#compdef git git-cvsserver git-receive-pack git-upload-archive git-upload-pack git-shell gitk tig

# Some parts of this completion's behaviour are configurable:
#
# Say you got your own git sub-commands (git will run a program `git-foo'
# when you run "git foo") and you want "git f<tab>" to complete that sub
# commands name for you. You can make that sub-command know to the completion
# via the user-command style:
#
#     % zstyle ':completion:*:*:git:*' user-commands foo:'description for foo'
#
# `user-commands' is a list style, so you can add any number of programs there.
# The :description part is optional, so you could add all git-* programs from
# your $path like this:
#
#     % zstyle ':completion:*:*:git:*' user-commands ${${(M)${(k)commands}:#git-*}/git-/}
#
# A better solution is to create a function _git-foo() to handle specific
# completion for that command.  This also allows you to add command-specific
# completion as well.  Place such a function inside an autoloaded #compdef file
# and you should be all set.  You can add a description to such a function by
# adding a line matching
# 
#     #description DESCRIPTION
#
# as the second line in the file.  See
# Completion/Debian/Command/_git-buildpackage in the Zsh sources for an
# example.
#
# As this solution is so much better than the user-commands zstyle method, the
# zstyle method is now DEPRECATED.  It will most likely be removed in the next
# major release of Zsh (5.0).
#
# When _git does not know a given sub-command (say `bar'), it falls back to
# completing file names for all arguments to that sub command. I.e.:
#
#     % git bar <tab>
#
# ...will complete file names. If you do *not* want that fallback to be used,
# use the `use-fallback' style like this:
#
#     % zstyle ':completion:*:*:git*:*' use-fallback false

# TODO: There is still undocumented configurability in here.

# HIGH-LEVEL COMMANDS (PORCELAIN)

# Main Porcelain Commands

(( $+functions[_git-add] )) ||
_git-add () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  local ignore_missing=
  if (( words[(I)-n|--dry-run] )); then
    ignore_missing='--ignore-missing[check if files (even missing) are ignored in dry run]'
  fi

  _arguments -w -C -S -s \
    '(-n --dry-run)'{-n,--dry-run}'[do not actually add files; only show which ones would be added]' \
    '(-v --verbose)'{-v,--verbose}'[show files as they are added]' \
    '(-f --force)'{-f,--force}'[allow adding otherwise ignored files]' \
    '(-i --interactive : -)'{-i,--interactive}'[add contents interactively to index]' \
    '(-p --patch)'{-p,--patch}'[like -i but go directly into patch mode for specified files]' \
    '(-e --edit)'{-e,--edit}'[open diff against index in editor]' \
    '(-u --update -A --all)'{-u,--update}'[update only files git already knows about]' \
    '(-A --all -u --update)'{-A,--all}'[act as both add . and add -u]' \
    '(-N --intent-to-add)'{-N,--intent-to-add}'[record only that path will be added later]' \
    '--refresh[do not add files, but refresh their stat() info in index]' \
    '--ignore-errors[continue adding if an error occurs]' \
    $ignore_missing \
    '*:: :->file' && return

  case $state in
    (file)
      declare -a ignored_files_alternatives
      if [[ -n ${opt_args[(I)-f|--force]} ]]; then
        ignored_files_alternatives=(
          'ignored-modified-files:ignored modified files:__git_ignore_line_inside_arguments __git_modified_files --ignored'
          'ignored-other-files:ignored other files:__git_ignore_line_inside_arguments __git_other_files --ignored')
      fi

      _alternative \
        'modified-files::__git_ignore_line_inside_arguments __git_modified_files' \
        'other-files::__git_ignore_line_inside_arguments __git_other_files' \
        $ignored_files_alternatives && ret=0
      ;;
  esac

  return ret
}

(( $+functions[_git-am] )) ||
_git-am () {
  local -a apply_options
  __git_setup_apply_options

  # NOTE: --rebasing and --resolvemsg are only for internal use between git
  # rebase and git am.
  # TODO: --patch-format is undocumented.
  # TODO: --rerere-autoupdate and --no-rerere-autoupdate are
  # undocumented (and not implemented here).
  _arguments -S \
    '(-s --signoff)'{-s,--signoff}'[add Signed-off-by: line to the commit message]' \
    '(-k --keep)'{-k,--keep}'[pass -k to git mailinfo]' \
    '(          --no-keep-cr)--keep-cr[pass --keep-cr to git mailsplit]' \
    '(--keep-cr             )--no-keep-cr[do not pass --keep-cr to git mailsplit]' \
    '(-c --scissors --no-scissors)'{-c,--scissors}'[strip everything before a scissors line]' \
    '(-c --scissors --no-scissors)--no-scissors[ignore scissors lines]' \
    '(-q --quiet)'{-q,--quiet}'[only print error messages]' \
    '(-u --utf8 --no-utf8)'{-u,--utf8}'[pass -u to git mailinfo]' \
    '(-u --utf8 --no-utf8)--no-utf8[pass -n to git mailinfo]' \
    '(-3 --3way)'{-3,--3way}'[use 3-way merge if patch does not apply cleanly]' \
    $apply_options \
    '(-i --interactive)'{-i,--interactive}'[apply patches interactively]' \
    '--committer-date-is-author-date[use author date as committer date]' \
    '--ignore-date[use committer date as author date]' \
    '--skip[skip the current patch]' \
    '(--continue -r --resolved)'{--continue,-r,--resolved}'[continue after resolving patch failure by hand]' \
    '--abort[restore the original branch and abort the patching operation]' \
    '--patch-format=-[specify format patches are in]:patch format:((mbox\:"mbox format"
                                                                    stgit-series\:"StGit patch series"
                                                                    stgit\:"stgit format"))' \
    '*:mbox file:_files'
}

(( $+functions[_git-archive] )) ||
_git-archive () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  declare -a backend_args

  if (( words[(I)--format=*] > 0 && words[(I)--format=*] < CURRENT )); then
    case ${words[$words[(I)--format=*]]#--format=} in
      (zip)
        backend_args=(
          '-0[do not deflate files]'
          '-1[minimum compression]'
          '-2[a little more compression]'
          '-3[slightly more compression]'
          '-4[a bit more compression]'
          '-5[even more compression]'
          '-6[slightly even more compression]'
          '-7[getting there]'
          '-8[close to maximum compression]'
          '-9[maximum compression]')
        ;;
    esac
  fi

  _arguments -w -C -S -s \
    '--format=-[format of the resulting archive]:archive format:__git_archive_formats' \
    '(- :)'{-l,--list}'[list available archive formats]' \
    '(-v --verbose)'{-v,--verbose}'[report progress to stderr]' \
    '--prefix=-[prepend the given path prefix to each filename]:path prefix:_directories -r ""' \
    '--output=[write archive to argument instead of stdout]:archive:_files' \
    '--worktree-attributes[look for attributes in .gitattributes in working directory too]' \
    $backend_args \
    '--remote=[archive remote repository]:remote repository:__git_any_repositories' \
    '--exec=[path to git-receive-pack on remote]:remote path:_files' \
    ': :__git_tree_ishs' \
    '*: :->file' && ret=0

  case $state in
    (file)
      __git_tree_files ${PREFIX:-.} $line[1] && ret=0
      ;;
  esac

  return ret
}

(( $+functions[_git-applymbox] )) ||
_git-applymbox () {
  _arguments -A '-*' \
    '-k[do not modify "Subject:" header]' \
    '-m[apply patches with "git-apply" and fail if patch is unclean]' \
    '-q[apply patches interactively]' \
    '-u[encode commit information in UTF-8]' \
    '(1)-c[restart command after fixing an unclean patch]:patch:_files -g ".dotest/0*"' \
    ':mbox file:_files' \
    '::signoff file:__git_signoff_file'
}

(( $+functions[_git-bisect] )) ||
_git-bisect () {
  # TODO: next subcommand is undocumented.  Git-bisect.sh mentions that the
  # subcommand might be removed from the UI level.
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -C \
    '--help[display git-bisect manual page]' \
    ': :->command' \
    '*:: :->option-or-argument' && ret=0

  case $state in
    (command)
      declare -a commands

      commands=(
        help:'display a short usage description'
        start:'reset bisection state and start a new bisection'
        bad:'mark current or given revision as bad'
        good:'mark current or given revision as good'
        skip:'choose a nearby commit'
        next:'find next bisection to test and check it out'
        reset:'finish bisection search and return to the given branch (or master)'
        visualize:'show the remaining revisions in gitk'
        view:'show the remaining revisions in gitk'
        replay:'replay a bisection log'
        log:'show the log of the current bisection'
        run:'run evaluation script')

      _describe -t commands command commands && ret=0
      ;;
    (option-or-argument)
      curcontext=${curcontext%:*}-$line[1]:

      case $line[1] in
        (start)
          _arguments -C \
            ':bad revision:__git_commits' \
            '*: :->revision-or-path' && ret=0
          case $state in
            (revision-or-path)
              if compset -N '--' || ! __git_is_committish $line[CURRENT-1]; then
                __git_cached_files && ret=0
              else
                _alternative \
                  'revisions::__git_revisions' \
                  'files::__git_cached_files' && ret=0
              fi
              ;;
          esac
          ;;
        (bad)
          _arguments \
            ': :__git_commits' && ret=0
          ;;
        (good|skip)
          # TODO: skip can take revlists.
          _arguments \
            '*: :__git_commits' && ret=0
          ;;
        (replay)
          _arguments \
            ':log file:_files' && ret=0
          ;;
        (reset)
          _arguments \
            ': :__git_heads' && ret=0
          ;;
        (run)
          _arguments \
            '*:: : _normal' && ret=0
          ;;
        (view|visualize)
          local -a log_options revision_options
          __git_setup_log_options
          __git_setup_revision_options

          _arguments -w -C -s \
            $log_options \
            $revision_options && ret=0
        (*)
          _nothing
          ;;
      esac
      ;;
  esac

  return ret
}

(( $+functions[_git-branch] )) ||
_git-branch () {
  declare l c m d

  l='--color --no-color -r -a -v --verbose --abbrev --no-abbrev'
  c='-l -f --force -t --track --no-track --set-upstream --contains --merged --no-merged'
  m='-m -M'
  d='-d -D'

  declare -a dependent_creation_args
  if (( words[(I)-r] == 0 )); then
    dependent_creation_args=(
      "($l $m $d): :__git_branch_names"
      "::start-point:__git_revisions")
  fi

  declare -a dependent_deletion_args
  if (( words[(I)-d] || words[(I)-D] )); then
    dependent_creation_args=
    dependent_deletion_args=(
      '-r[delete only remote-tracking branches]')
    if (( words[(I)-r] )); then
      dependent_deletion_args+='*: :__git_ignore_line_inside_arguments __git_remote_branch_names'
    else
      dependent_deletion_args+='*: :__git_ignore_line_inside_arguments __git_branch_names'
    fi
  fi

  declare -a dependent_modification_args
  if (( words[(I)-m] || words[(I)-M] )); then
    dependent_creation_args=
    dependent_modification_args=(
      ':old or new branch name:__git_branch_names'
      '::new branch name:__git_branch_names')
  fi

  _arguments -w -S -s \
    "($c $m $d --no-color :)--color=-[turn on branch coloring]:: :__git_color_whens" \
    "($c $m $d : --color)--no-color[turn off branch coloring]" \
    "($c $m      -a)-r[list or delete only remote-tracking branches]" \
    "($c $m $d : -r)-a[list both remote-tracking branches and local branches]" \
    "($c $m $d : -v --verbose)"{-v,--verbose}'[show SHA1 and commit subject line for each head]' \
    "($c $m $d :)--abbrev=[set minimum SHA1 display-length]: :__git_guard_number length" \
    "($c $m $d :)--no-abbrev[do not abbreviate sha1s]" \
    "($l $m $d)-l[create the branch's reflog]" \
    "($l $m $d -f --force)"{-f,--force}"[force the creation of a new branch]" \
    "($l $m $d -t --track)"{-t,--track}"[set up configuration so that pull merges from the start point]" \
    "($l $m $d)--no-track[override the branch.autosetupmerge configuration variable]" \
    "($l $m $d)--set-upstream[set up configuration so that pull merges]" \
    "($l $m $d)--contains=[only list branches which contain the specified commit]: :__git_committishs" \
    "($l $m $d)--merged=[only list branches which are fully contained by HEAD]: :__git_committishs" \
    "($l $m $d)--no-merged=[do not list branches which are fully contained by HEAD]: :__git_committishs" \
    $dependent_creation_args \
    "($l $c $d -M)-m[rename a branch and the corresponding reflog]" \
    "($l $c $d -m)-M[rename a branch even if the new branch-name already exists]" \
    $dependent_modification_args \
    "($l $c $m -D)-d[delete a fully merged branch]" \
    "($l $c $m -d)-D[delete a branch]" \
    $dependent_deletion_args
}

(( $+functions[_git-bundle] )) ||
_git-bundle () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -C \
    ': :->command' \
    '*:: :->option-or-argument' && ret=0

  case $state in
    (command)
      declare -a commands

      commands=(
        'create:create a bundle'
        'verify:check that a bundle is valid and will apply cleanly'
        'list-heads:list references defined in bundle'
        'unbundle:unbundle a bundle to repository')

      _describe -t commands command commands && ret=0
      ;;
    (option-or-argument)
      curcontext=${curcontext%:*}-$line[1]:

      case $line[1] in
        (create)
          if (( CURRENT == 2 )); then
            _arguments \
              ':bundle:_files' && ret=0
          else
            local revision_options
            __git_setup_revision_options

            _arguments -w -S -s \
              $revision_options \
              ': :_files' \
              '*: :__git_commit_ranges2' && ret=0
          fi
          ;;
        (verify)
          _arguments \
            ':bundle:_files' && ret=0
          ;;
        (list-heads|unbundle)
          _arguments \
            '*: :__git_ref_specs' && ret=0
          ;;
      esac
      ;;
  esac

  return ret
}

(( $+functions[_git-checkout] )) ||
_git-checkout () {
  # TODO: __git_tree_ishs is just stupid.  It should be giving us a list of tags
  # and perhaps also allow all that just with ^{tree} and so on.  Not quite sure
  # how to do that, though.
  local new_branch_reflog_opt
  if (( words[(I)-b|-B] )); then
    new_branch_reflog_opt="(--patch)-l[create the new branch's reflog]"
  fi

  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -w -C -s \
    '(-q --quiet)'{-q,--quiet}'[suppress feedback messages]' \
    '(-f --force -m --merge --conflict --patch)'{-f,--force}'[force branch switch/ignore unmerged entries]' \
    '(-q --quiet        --theirs --patch)--ours[check out stage #2 for unmerged paths]' \
    '(-q --quiet --ours          --patch)--theirs[check out stage #3 for unmerged paths]' \
    '(   -B --orphan --ours --theirs --conflict --patch)-b[create a new branch based at given commit]: :__git_branch_names' \
    '(-b    --orphan --ours --theirs --conflict --patch)-B[create or update branch based at given commit]: :__git_branch_names' \
    '(-t --track --orphan --patch)'{-t,--track}'[set up configuration so pull merges from the base commit]' \
    '(--patch)--no-track[override the branch.autosetupmerge configuration variable]' \
    $new_branch_reflog_opt \
    '(-b -B -t --track --patch)--orphan[create a new orphan branch based at given commit]: :__git_branch_names' \
    '(-q --quiet -f --force -m --merge --conflict --patch)'{-m,--merge}'[3way merge current branch, working tree and new branch]' \
    '(-q --quiet -f --force -m --merge --patch)--conflict[same as --merge, using given merge style]:style:(merge diff3)' \
    '(-)'{-p,--patch}'[interactively select hunks in diff between given tree-ish and working tree]' \
    '(-)--[start file arguments]' \
    '*:: :->branch-or-tree-ish-or-file' && ret=0

  case $state in
    (branch-or-tree-ish-or-file)
      # TODO: Something about *:: brings us here when we complete at “-”.  I
      # guess that this makes sense in a way, as we might want to treat it as
      # an argument, but I can’t find anything in the documentation about this
      # behavior.
      [[ $line[CURRENT] = -* ]] && return
      if (( CURRENT == 1 )) && [[ -z $opt_args[(I)--] ]]; then
        # TODO: Allow A...B
        local branch_arg='branches::__git_revisions' \
              tree_ish_arg='tree-ishs::__git_tree_ishs' \
              file_arg='modified-files::__git_modified_files'

        if [[ -n ${opt_args[(I)-b|-B|--orphan]} ]]; then
          tree_ish_arg=
          file_arg=
        elif [[ -n $opt_args[(I)--track] ]]; then
          branch_arg='remote-branches::__git_remote_branch_names'
          tree_ish_arg=
          file_arg=
        elif [[ -n ${opt_args[(I)--ours|--theirs|-m|--conflict|--patch]} ]]; then
          branch_arg=
        fi

        _alternative \
          $branch_arg \
          $tree_ish_arg \
          $file_arg && ret=0
      elif [[ -n ${opt_args[(I)-b|-B|-t|--track|--orphan]} ]]; then
        _nothing
      elif [[ -n $line[1] ]] && __git_is_treeish $line[1]; then
        __git_ignore_line __git_tree_files ${PREFIX:-.} $line[1] && ret=0
      else
        __git_ignore_line __git_modified_files && ret=0
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-cherry-pick] )) ||
_git-cherry-pick () {
  _arguments \
    '(-e --edit --ff)'{-e,--edit}'[edit commit before committing the revert]' \
    '(--ff)-x[append information about what commit was cherry-picked]' \
    '(-m --mainline)'{-m,--mainline}'[specify mainline when cherry-picking a merge commit]:parent number' \
    '(-n --no-commit --ff)'{-n,--no-commit}'[do not make the actually commit]' \
    '(-s --signoff --ff)'{-s,--signoff}'[add Signed-off-by line at the end of the commit message]' \
    '(-e --edit -x -n --no-commit -s --signoff)--ff[fast forward, if possible]' \
    ': :__git_revisions'
}

(( $+functions[_git-citool] )) ||
_git-citool () {
  _nothing
}

(( $+functions[_git-clean] )) ||
_git-clean () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -w -C -S -s \
    '-d[also remove untracked directories]' \
    '(-f --force)'{-f,--force}'[required when clean.requireForce is true (default)]' \
    '(-n --dry-run)'{-n,--dry-run}'[only show what would and what would not be removed]' \
    '(-q --quiet)'{-q,--quiet}'[only report errors]' \
    '*'{-e,--exclude=}'[skip files matching specified pattern]:pattern' \
    '(-X   )-x[also remove ignored files]' \
    '(   -x)-X[remove only ignored files]' \
    '*: :->file' && ret=0

  case $state in
    (file)
      local exclusion ignored_other_files_alt other_files_alt
      declare -a exclusions
      for spec in $opt_args[-e] $opt_args[--exclude]; do
        integer i
        for (( i = 1; i <= $#spec; i++ )); do
          case $spec[i] in
            (\\)
              if (( i + 1 <=  $#spec )) && [[ $spec[i+1] == : ]]; then
                (( i++ ))
                exclusion+=:
              else
                exclusion+=$spec[i]
              fi
              ;;
            (:)
              exclusions+=(-x $exclusion) exclusion=
              ;;
            (*)
              exclusion+=$spec[i]
              ;;
          esac
        done
      done
      [[ -n $exclusion ]] && exclusions+=(-x $exclusion)
      if [[ -n ${opt_args[(I)-x|-X]} ]]; then
        ignored_other_files_alt="ignored-untracked-files::__git_ignored_other_files $exclusions"
      fi
      if [[ -z ${opt_args[(I)-X]} ]]; then
        other_files_alt="untracked-files::__git_other_files $exclusions"
      fi
      _alternative \
        $ignored_other_files_alt \
        $other_files_alt && ret=0
      ;;
  esac

  return ret
}

(( $+functions[_git-clone] )) ||
_git-clone () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  # TODO: Argument to -o should be a remote name.
  # TODO: Argument to -b should complete branch names in the repository being
  # cloned.
  _arguments -w -C -S -s \
    '(-l --local)'{-l,--local}'[clone locally, hardlink refs and objects if possible]' \
    '--no-hardlinks[copy files instead of hardlinking when doing a local clone]' \
    '(-s --shared)'{-s,--shared}'[share the objects with the source repository (warning: see man page)]' \
    '--reference[reference repository]:repository:_directories' \
    '(-q --quiet)'{-q,--quiet}'[operate quietly]' \
    '(-v --verbose)'{-v,--verbose}'[always display the progressbar]' \
    '--progress[output progress even if stderr is not a terminal]' \
    '(-n --no-checkout)'{-n,--no-checkout}'[do not checkout HEAD after clone is complete]' \
    '(-o --origin)--bare[make a bare GIT repository]' \
    '(--bare)--mirror[clone refs into refs/* instead of refs/remotes/origin/*]' \
    '(-o --origin --bare)'{-o,--origin}'[use given remote name instead of "origin"]: :__git_guard_branch-name' \
    '(-b --branch)'{-b,--branch}'[point HEAD to the given branch]: :__git_guard_branch-name' \
    '(-u --upload-pack)'{-u,--upload-pack=}'[specify path to git-upload-pack on remote side]:remote path' \
    '--template=[directory to use as a template for the object database]: :_directories' \
    '--depth[create a shallow clone, given number of revisions deep]: :__git_guard_number depth' \
    '--recursive[initialize all contained submodules]' \
    ': :->repository' \
    ': :_directories' && ret=0

  case $state in
    (repository)
      if [[ -n ${opt_args[(I)-l|--local|--no-hardlinks|-s|--shared|--reference]} ]]; then
        __git_local_repositories && ret=0
      else
        __git_any_repositories && ret=0
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-commit] )) ||
_git-commit () {
  local amend_opt='--amend[amend the tip of the current branch]'
  if __git_is_initial_commit || __git_is_in_middle_of_merge; then
    amend_opt=
  fi

  local reset_author_opt=
  if (( words[(I)-C|--reuse-message(=*|)|-c|--reedit-message(=*|)|--amend] )); then
    reset_author_opt='(--author)--reset-author[make committer the author of the commit]'
  fi

  # TODO: --null is an undocumented alias.
  # TODO: --interactive isn’t explicitly listed in the documentation.
  _arguments -w -S -s \
    '(-a --all --interactive -o --only -i --include *)'{-a,--all}'[stage all modified and deleted paths]' \
    $reset_author_opt \
    '(        --porcelain --dry-run)--short[output dry run in short format]' \
    '(--short             --dry-run)--porcelain[output dry run in porcelain-ready format]' \
    '(--short --porcelain --dry-run -z --null)'{-z,--null}'[separate dry run entry output with NUL]' \
    '(--reset-author)--author[override the author name used in the commit]:author name' \
    '--date=[override the author date used in the commit]:date' \
    '(-s --signoff)'{-s,--signoff}'[add Signed-off-by line at the end of the commit message]' \
    '(-n --no-verify)'{-n,--no-verify}'[do not look for suspicious lines the commit introduces]' \
    '--allow-empty[allow recording an empty commit]' \
    '--allow-empty-message[allow recording a commit with an empty message]' \
    '--cleanup=[specify how the commit message should be cleaned up]:mode:((verbatim\:"don'\''t change the commit message at all"
                                                                            whitespace\:"remove leading and trailing whitespace lines"
                                                                            strip\:"remove both whitespace and commentary lines"
                                                                            default\:"act as '\''strip'\'' if the message is to be edited and as '\''whitespace'\'' otherwise"))' \
    '(-e --edit)'{-e,--edit}'[edit the commit message before committing]' \
    '(-a --all --interactive -o --only -i --include)'{-i,--include}'[update the given files and commit the whole index]' \
    '(-a --all --interactive -o --only -i --include)'{-o,--only}'[commit only the given files]' \
    '(-u --untracked-files)'{-u-,--untracked-files=}'[show files in untracked directories]::mode:((no\:"show no untracked files"
                                                                                                  normal\:"show untracked files and directories"
                                                                                                  all\:"show individual files in untracked directories"))' \
    '(-q --quiet -v --verbose)'{-v,--verbose}'[show unified diff of all file changes]' \
    '(-q --quiet -v --verbose)'{-q,--quiet}'[suppress commit summary message]' \
    '--dry-run[only show list of paths that are to be commited or not, and any untracked]' \
    '(         --no-status)--status[include the output of git status in the commit message template]' \
    '(--status            )--no-status[do not include the output of git status in the commit message template]' \
    '(-a --all --interactive -o --only -i --include *)--interactive[interactively update paths in the index file]' \
    '*: :__git_ignore_line_inside_arguments __git_changed_files' \
    - '(message)' \
      {-C,--reuse-message=}'[use existing commit object with same log message]: :__git_commits' \
      {-c,--reedit-message=}'[use existing commit object and edit log message]: :__git_commits' \
      {-F,--file=}'[read commit message from given file]: :_files' \
      {-m,--message=}'[use the given message as the commit message]:message' \
      {-t,--template=}'[use file as a template commit message]:template:_files' \
      $amend_opt
}

(( $+functions[_git-describe] )) ||
_git-describe () {
  _arguments -w -S -s \
    '(*)--dirty=-[describe HEAD, adding mark if dirty]::mark' \
    '--all[use any ref found in "$GIT_DIR/refs/"]' \
    '--tags[use any ref found in "$GIT_DIR/refs/tags"]' \
    '(--tags)--contains[find the tag after the commit instead of before]' \
    '(--long)--abbrev=[set minimum SHA1 display-length]: :__git_guard_number length' \
    '(             --exact-match)--candidates=[consider up to given number of candidates]: :__git_guard_number "number of candidates"' \
    '(--candidates              )--exact-match[only output exact matches, same as --candidates=0]' \
    '--debug[display information about the searching strategy]' \
    '(--abbrev)--long[always show full format, even for exact matches]' \
    '--match=[only consider tags matching glob pattern]:pattern' \
    '--always[show uniquely abbreviated commit object as fallback]' \
    '*: :__git_committishs'
}

(( $+functions[_git-diff] )) ||
_git-diff () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  local -a diff_options
  __git_setup_diff_options

  _arguments -w -C -s \
    $* \
    $diff_options \
    '(--cached --staged)'{--cached,--staged}'[show diff between index and named commit]' \
    '(-)--[start file arguments]' \
    '*:: :->from-to-file' && ret=0

  case $state in
    (from-to-file)
      case $CURRENT in
        (1)
          if [[ -n ${opt_args[(I)--]} ]]; then
            if [[ -n ${opt_args[(I)--cached|--staged]} ]]; then
              __git_changed-in-index_files && ret=0
            else
              __git_changed-in-working-tree_files && ret=0
            fi
          else
            local files_alt='files::__git_changed-in-working-tree_files'

            if [[ -n ${opt_args[(I)--cached|--staged]} ]]; then
              files_alt='files::__git_changed-in-index_files'
            fi

            _alternative \
              'commit-ranges::__git_commit_ranges' \
              'blobs-and-trees-in-treeish::__git_blobs_and_trees_in_treeish' \
              $files_alt \
              'blobs::__git_blobs ' && ret=0
          fi
          ;;
        (2)
          if __git_is_committish_range $line[1]; then
            __git_tree_files ${PREFIX:-.} $(__git_committish_range_last $line[1]) && ret=0
          elif __git_is_committish $line[1] || __git_is_treeish $line[1]; then
            if [[ -n ${opt_args[(I)--]} ]]; then
              __git_changed-in-working-tree_files && ret=0
            else
              _alternative \
                'commits::__git_commits' \
                'blobs-and-trees-in-treeish::__git_blobs_and_trees_in_treeish' \
                'files::__git_changed-in-working-tree_files' && ret=0
            fi
          elif __git_is_blob $line[1]; then
            if [[ -n ${opt_args[(I)--]} ]]; then
              __git_cached_files && ret=0
            else
              _alternative \
                'files::__git_cached_files' \
                'blobs::__git_blobs' && ret=0
            fi
          elif [[ -n ${opt_args[(I)--cached|--staged]} ]]; then
            __git_changed-in-index_files && ret=0
          else
            __git_changed-in-working-tree_files && ret=0
          fi
          ;;
        (*)
          if __git_is_committish_range $line[1]; then
            __git_tree_files ${PREFIX:-.} $(__git_committish_range_last $line[1]) && ret=0
          elif { __git_is_committish $line[1] && __git_is_committish $line[2] } ||
              __git_is_treeish $line[2]; then
            __git_tree_files ${PREFIX:-.} $line[2] && ret=0
          elif __git_is_blob $line[1] && __git_is_blob $line[2]; then
            _nothing
          else
            __git_changed-in-working-tree_files && ret=0
          fi
          ;;
      esac
      ;;
  esac

  return ret
}

(( $+functions[_git-fetch] )) ||
_git-fetch () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  local -a fetch_options
  __git_setup_fetch_options

  _arguments -w -C -S -s \
    $fetch_options \
    '--multiple[allow several repository arguments]' \
    '*:: :->repository-or-group-or-refspec' && ret=0

  case $state in
    (repository-or-group-or-refspec)
      if (( CURRENT > 1 )) && [[ -z ${opt_args[(I)--multiple]} ]]; then
        __git_ref_specs && ret=0
      else
        _alternative \
          'remotes::__git_remotes' \
          'remotes-groups::__git_remotes_groups' \
          'local-repositories::__git_local_repositories' \
          'remote-repositories::__git_remote_repositories' && ret=0
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-format-patch] )) ||
_git-format-patch () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  local -a diff_options
  __git_setup_diff_options

  # TODO: -- is wrong.
  # TODO: Should filter out --name-only, --name-status, and --check from
  # $diff_options.
  _arguments -w -C -S -s \
    $diff_options \
    '--[limit the number of patches to prepare]: :__git_guard_number "number of patches to prepare"' \
    '(-o --output-directory --stdout)'{-o,--output-directory}'[store resulting files in given directory]: :_directories' \
    '(-n --numbered -N --no-numbered -k --keep-subject)'{-n,--numbered}'[name output in \[PATCH n/m\] format]' \
    '(-n --numbered -N --no-numbered -k --keep-subject)'{-N,--no-numbered}'[name output in \[PATCH\] format]' \
    '--start-number=[start numbering patches at given number]: :__git_guard_number "patch number"' \
    '--numbered-files[use only number for file name]' \
    '(-n --numbered -N --no-numbered -k --keep-subject --subject-prefix)'{-k,--keep-subject}'[do not strip/add \[PATCH\] from the first line of the commit message]' \
    '(-s --signoff)'{-s,--signoff}'[add Signed-off-by: line to the commit message]' \
    '(-o --output-directory)--stdout[output the generated mbox on standard output (implies --mbox)]' \
    '(         --no-attach --inline)--attach=-[create attachments instead of inlining patches]::boundary' \
    '(--attach             --inline)--no-attach[disable creation of attachments]' \
    '(--attach --no-attach         )--inline=-[inline patches]::boundary' \
    '(         --no-thread)--thread=-[make the second and subsequent mails refer to the first]::style:((shallow\:"all refer to the first"
                                                                                                        deep\:"each refers to the previous"))' \
    '(--thread            )--no-thread[do not thread messages]' \
    '--in-reply-to=[make the first mail a reply to the given message]:message id' \
    '--ignore-if-in-upstream[do not include a patch that matches a commit in the given range]' \
    '(-k --keep-subject)--subject-prefix=[use the given prefix instead of \[PATCH\]]:prefix' \
    '*--to=[add To: header to email headers]: :_email_addresses' \
    '*--cc=[add Cc: header to email headers]: :_email_addresses' \
    '*--add-header=[add an arbitrary header to email headers]:header' \
    '--cover-letter[generate a cover letter template]' \
    '(            --no-signature)--signature=[add a signature]:signature' \
    '(--signature               )--no-signature[do not add a signature]' \
    '--suffix=[use the given suffix for filenames]:filename suffix' \
    '--no-binary[do not output contents of changes in binary files, only note that they differ]' \
    '--root[treat the revision argument as a range]' \
    ': :->commit-or-commit-range' && ret=0

  case $state in
    (commit-or-commit-range)
      if [[ -n ${opt_args[(I)--root]} ]]; then
        __git_commits && ret=0
      else
        __git_commit_ranges && ret=0
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-gc] )) ||
_git-gc () {
  _arguments -w -S -s \
    '--aggressive[more aggressively optimize]' \
    '--auto[check whether housekeeping is required]' \
    '(        --no-prune)--prune=[prune loose objects older than given date]: :__git_datetimes' \
    '(--prune           )--no-prune[do not prune any loose objects]' \
    '--quiet[suppress all progress reports]'
}

(( $+functions[_git-grep] )) ||
_git-grep () {
  local -a pattern_operators

  # TODO: Need to deal with grouping with ( and )
  if (( words[(I)-e] == CURRENT - 2 )); then
    pattern_operators=(
      '--and[both patterns must match]'
      '--or[either pattern must match]'
      '--not[the following pattern must not match]')
  fi

  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  # TODO: Need to implement -<num> as a shorthand for -C<num>
  _arguments -C -A '-*' \
    '(-O --open-files-in-pager --no-index)--cached[search blobs registered in index file instead of working tree]' \
    '(--cached)--no-index[search files in current directory, not just treacked files]' \
    '(-a --text)'{-a,--text}'[process binary files as if they were text]' \
    '(-i --ignore-case)'{-i,--ignore-case}'[ignore case when matching]' \
    '-I[do not match pattern in binary files]' \
    '--max-depth=[descend at most given levels of directories]:__git_guard_number depth' \
    '(-w --word-regexp)'{-w,--word-regexp}'[match only whole words]' \
    '(-v --invert-match)'{-v,--invert-match}'[select non-matching lines]' \
    '(   -H)-h[supress output of filenames]' \
    '(-h   )-H[show filenames]' \
    '--full-name[output paths relative to the project top directory]' \
    '(-E --extended-regexp -G --basic-regexp)'{-E,--extended-regexp}'[use POSIX extended regexes]' \
    '(-E --extended-regexp -G --basic-regexp)'{-G,--basic-regexp}'[use POSIX basic regexes]' \
    '(-F --fixed-strings)'{-F,--fixed-strings}'[do not interpret pattern as a regex]' \
    '-n[prefix the line number to matching lines]' \
    '(-l --files-with-matches -L --files-without-match --name-only)'{-l,--files-with-matches,--name-only}'[show only names of matching files]' \
    '(-l --files-with-matches -L --files-without-match)'{-L,--files-without-match}'[show only names of non-matching files]' \
    '(--cached -O --open-files-in-pager)'{-O,--open-files-in-pager}'=-[open matching files in pager]::_path_commands' \
    '(-z --null)'{-z,--null}'[output \0 after filenames]' \
    '(-c --count)'{-c,--count}'[show number of matching lines in files]' \
    '(        --no-color)--color=-[color matches]:: :__git_color_whens' \
    '(--color           )---no-color[do not color matches]' \
    '-A[show trailing context]: :__git_guard_number lines' \
    '-B[show leading context]: :__git_guard_number lines' \
    '-C[show context]: :__git_guard_number lines' \
    '(-p --show-function)'{-p,--show-function}'[show preceding line containing function name of match]' \
    '(1)*-f[read patterns from given file]:pattern file:_files' \
    '(1)*-e[use the given pattern for matching]:pattern' \
    $pattern_operators \
    '--all-match[all patterns must match]' \
    ':pattern' \
    '*:: :->tree-or-file' && ret=0

  # TODO: If --cached, --no-index, -O, or --open-files-in-pager was given,
  # don’t complete treeishs.
  case $state in
    (tree-or-file)
      integer first_tree last_tree start end

      (( start = words[(I)(-f|-e)] > 0 ? 1 : 2 ))
      (( end = $#line - 1 ))

      for (( i = start; i <= end; i++ )); do
        [[ line[i] == '--' ]] && break
        __git_is_treeish $line[i] || break
        if (( first_tree == 0 )); then
          (( first_tree = last_tree = i ))
        else
          (( last_tree = i ))
        fi
      done

      # TODO: Need to respect --cached and --no-index here.
      if (( last_tree == 0 || last_tree == end )); then
        if (( first_tree == 0 )); then
          _alternative \
            'treeishs::__git_tree_ishs' \
            'files::__git_cached_files' && ret=0
        else
          _alternative \
            'treeishs::__git_trees' \
            "files::__git_tree_files ${PREFIX:-.} $line[first_tree,last_tree]" && ret=0
        fi
      else
        if (( first_tree == 0 )); then
          __git_cached_files && ret=0
        else
          __git_tree_files ${PREFIX:-.} $line[first_tree,last_tree] && ret=0
        fi
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-gui] )) ||
_git-gui () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -C \
    '--version[display version information]' \
    ': :->command' \
    '*:: :->arg' && ret=0

  case $state in
    (command)
      local -a commands

      commands=(
        blame:'start a blame viewer'
        browser:'start a tree browser'
        citool:'arrange to make one commit'
        version:'display version information')

      _describe -t commands command commands && ret=0
      ;;
    (arg)
      curcontext=${curcontext%:*}-$line[1]:

      case $line[1] in
        (blame)
          _git-blame && ret=0
          ;;
        (browser)
          _arguments -C \
            ':: :__git_revisions' \
            '*:: :->file' && ret=0

          case $state in
            (file)
              __git_is_treeish $line[1] && __git_tree_files ${PREFIX:-.} $line[1] && ret=0
              ;;
          esac
          ;;
        (citool)
          _git-citool && ret=0
          ;;
        (version)
          _nothing
          ;;
        (*)
          _nothing
          ;;
      esac
      ;;
  esac

  return ret
}

(( $+functions[_git-init] )) ||
_git-init () {
  _arguments -w -S -s \
    '(-q --quiet)'{-q,--quiet}'[do not print any results to stdout]' \
    '--bare[create a bare repository]' \
    '--template=[directory to use as a template for the object database]: :_directories' \
    '--shared=[share repository amongst several users]:: :__git_repository_permissions' \
    ':: :_directories'
}

(( $+functions[_git-log] )) ||
_git-log () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  local -a log_options revision_options diff_options
  __git_setup_log_options
  __git_setup_revision_options
  __git_setup_diff_options

  _arguments -w -C -s \
    $log_options \
    $revision_options \
    $diff_options \
    '(-)--[start file arguments]' \
    '*:: :->commit-range-or-file' && ret=0

  case $state in
    (commit-range-or-file)
      case $CURRENT in
        (1)
          if [[ -n ${opt_args[(I)--]} ]]; then
            __git_cached_files && ret=0
          else
            _alternative \
              'commit-ranges::__git_commit_ranges' \
              'cached-files::__git_cached_files' && ret=0
          fi
          ;;
        (*)
          # TODO: Write a wrapper function that checks whether we have a
          # committish range or comittish and calls __git_tree_files
          # appropriately.
          if __git_is_committish_range $line[1]; then
            __git_tree_files ${PREFIX:-.} $(__git_committish_range_last $line[1]) && ret=0
          elif __git_is_committish $line[1]; then
            __git_tree_files ${PREFIX:-.} $line[1] && ret=0
          else
            __git_cached_files && ret=0
          fi
          ;;
      esac
  esac

  return ret
}

(( $+functions[_git-merge] )) ||
_git-merge () {
  local -a merge_options
  __git_setup_merge_options

  _arguments -w -S -s \
    $merge_options \
    '-m[set the commit message to be used for the merge commit]:merge message' \
    '(                    --no-rerere-autoupdate)--rerere-autoupdate[allow the rerere mechanism to update the index]' \
    '(--rerere-autoupdate                       )--no-rerere-autoupdate[do not allow the rerere mechanism to update the index]' \
    '*: :__git_commits'
}

(( $+functions[_git-mv] )) ||
_git-mv () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -w -C -S -s \
    '(-f --force)'{-f,--force}'[rename/move even if targets exist]' \
    '-k[skip rename/move that would lead to errors]' \
    '(-n --dry-run)'{-n,--dry-run}'[only show what would happen]' \
    ':source:__git_cached_files' \
    '*:: :->source-or-destination' && ret=0

  case $state in
    (source-or-destination)
      _alternative \
        'cached-files:source:__git_cached_files' \
        'directories:destination directory:_directories' && ret=0
      ;;
  esac

  return ret
}

(( $+functions[_git-notes] )) ||
_git-notes () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -C \
    '--ref=[manipulate the notes tree in given ref]: :__git_notes_refs' \
    ': :->command' \
    '*:: :->option-or-argument' && ret=0

  case $state in
    (command)
      local -a commands

      commands=(
        list:'list notes object for given object'
        add:'add notes for a given object'
        copy:'copy notes from one object to another'
        append:'append notes to a given object'
        edit:'edit notes for a given object'
        show:'show notes for a given object'
        remove:'remove notes for a given object'
        prune:'remove all notes for non-existing/unreachable objects')

      _describe -t commands command commands && ret=0
      ;;
    (option-or-argument)
      curcontext=${curcontext%:*}-$line[1]:

      case $line[1] in
        (list|show|edit|remove)
          _arguments \
            ': :__git_commits' && ret=0
          ;;
        (add)
          # TODO: Only complete commits that don’t have notes already, unless
          # -f or --force has been given.
          _arguments -w -S -s \
            '*'{-m,--message=}'[use given note message]:message' \
            '*'{-F,--file=}'[take note message from given file]:note message file:_files' \
            '(-C --reuse-message)'{-C,--reuse-message=}'[take note message from given blob object]: :__git_blobs' \
            '(-c --reedit-message)'{-c,--reedit-message=}'[take note message from given blob object and edit it]: :__git_blobs' \
            '(-f --force)'{-f,--force}'[overwrite existing note]' \
            ': :__git_commits' && ret=0
          ;;
        (copy)
          # TODO: --for-rewrite is undocumented.
          _arguments -w -S -s \
            '(-f --force)'{-f,--force}'[replace existing note]' \
            '(:)--stdin[read objects from stdin]' \
            '(:--stdin)--for-rewrite=[load rewriting config for given command]:command:(amend rebase)' \
            ': :__git_commits' \
            ': :__git_commits' && ret=0
          ;;
        (append)
          _arguments -w -S -s \
            '*'{-m,--message=}'[use given note message]:message' \
            '*'{-F,--file=}'[take note message from given file]:note message file:_files' \
            '(-C --reuse-message)'{-C,--reuse-message=}'[take note message from given blob object]: :__git_blobs' \
            '(-c --reedit-message)'{-c,--reedit-message=}'[take note message from given blob object and edit it]: :__git_blobs' \
            ': :__git_commits' && ret=0
          ;;
        (*)
          _nothing
          ;;
      esac
      ;;
  esac

  return ret
}

(( $+functions[_git-pull] )) ||
_git-pull () {
  local -a merge_options fetch_options
  __git_setup_merge_options
  __git_setup_fetch_options

  _arguments \
    $merge_options \
    '(         --no-rebase)--rebase[perform a rebase after fetching]' \
    '(--rebase            )--no-rebase[do not perform a rebase after fetching]' \
    $fetch_options \
    ': :__git_any_repositories' \
    '*: :__git_ref_specs'
}

(( $+functions[_git-push] )) ||
_git-push () {
  # NOTE: For --receive-pack we use _files to complete, even though this will
  # only complete files on the local end, not the remote end.  Still, it may be
  # helpful to get some sort of completion going, perhaps modifying the path
  # later on to match the remote end.
  _arguments -w -S -s \
    '--all[push all refs under refs/heads/]' \
    '--mirror[push all refs under refs/heads/ and refs/tags/ and delete non-existing refs]' \
    '(-n --dry-run)'{-n,--dry-run}'[do everything except actually send the updates]' \
    '--porcelain[produce machine-readable output]' \
    '--delete[delete all listed refs from the remote repository]' \
    '--tags[all tags under refs/tags are pushed]' \
    '(--receive-pack --exec)'{--receive-pack=-,--exec=-}'[path to git-receive-pack on remote]:remote git-receive-pack:_files' \
    '(-f --force)'{-f,--force}'[allow refs that are not ancestors to be updated]' \
    '(:)--repo=[default repository to use]:repository:__git_any_repositories' \
    '(-u --set-upstream)'{-u,--set-upstream}'[add upstream reference for each branch that is up to date or pushed]' \
    '(       --no-thin)--thin[try to minimize number of objects to be sent]' \
    '(--thin          )--no-thin[do not try to minimize number of objects to be sent]' \
    '(-q --quiet -v --verbose --progress)'{-q,--quiet}'[suppress all output]' \
    '(-q --quiet -v --verbose)'{-v,--verbose}'[output additional information]' \
    '(-q --quiet)--progress[output progress information]' \
    ':: :__git_any_repositories' \
    '*: :__git_ref_specs'
}

(( $+functions[_git-rebase] )) ||
_git-rebase () {
  local -a autosquash_opts

  if (( words[(I)--interactive] )); then
    autosquash_opts=(
      '(             --no-autosquash)--autosquash[check for auto-squash boundaries]'
      '(--autosquash                )--no-autosquash[do not check for auto-squash boundaries]')
  fi

  _arguments -A '-*' \
    '(- :)--continue[continue after resolving merge conflict]' \
    '(- :)--abort[abort current rebase]' \
    '(- :)--skip[skip the current patch]' \
    '(-m --merge)'{-m,--merge}'[use merging strategies to rebase]' \
    '*'{-s,--strategy=}'[use given merge strategy]:merge strategy:__git_merge_strategies' \
    '*'{-X,--strategy-option=}'[pass merge-strategy-specific option to merge strategy]' \
    '(-q --quiet -v --verbose --stat -n --no-stat)'{-q,--quiet}'[suppress all output]' \
    '(-q --quiet -v --verbose --stat -n --no-stat)'{-v,--verbose}'[output additional information]' \
    '--no-verify[bypass the pre-rebase hook]' \
    '-C-[ensure that given lines of surrounding context match]: :__git_guard_number "lines of context"' \
    '(-f --force-rebase)'{-f,--force-rebase}'[force rebase even if current branch descends from commit rebasing onto]' \
    '(-i --interactive)--ignore-whitespace[ignore whitespace in context]' \
    '(-i --interactive)--whitespace=-[detect a new or modified line that has whitespace errors]: :__git_apply_whitespace_strategies' \
    '(-i --interactive)--committer-date-is-author-date[use author date as committer date]' \
    '(-i --interactive --ignore-whitespace --whitespace --committer-date-is-author-date)'{-i,--interactive}'[make a list of commits to be rebased and open in $EDITOR]' \
    '(-p --preserve-merges --interactive)'{-p,--preserve-merges}'[try to recreate merges instead of ignoring them]' \
    '(1)--root[rebase all reachable commits]' \
    $autosquash_opts \
    '--no-ff[cherry-pick all rebased commits with --interactive, otherwise synonymous to --force-rebase]' \
    '--onto[start new branch with HEAD equal to given revision]:newbase:__git_revisions' \
    ':upstream branch:__git_revisions' \
    '::working branch:__git_branch_names'
}

(( $+functions[_git-reset] )) ||
_git-reset () {
  local curcontext=$curcontext state line ret=1
  typeset -A opt_args

  _arguments -w -C -s \
      '(       --mixed --hard --merge --keep -p --patch -- *)--soft[do not touch the index file nor the working tree]' \
      '(--soft         --hard --merge --keep -p --patch -- *)--mixed[reset the index but not the working tree (default)]' \
      '(--soft --mixed        --merge --keep -p --patch -- *)--hard[match the working tree and index to the given tree]' \
      '(--soft --mixed --hard         --keep -p --patch -- *)--merge[reset out of a conflicted merge]' \
      '(--soft --mixed --hard --merge        -p --patch -- *)--keep[like --hard, but keep local working tree changes]' \
      '(-p --patch)'{-p,--patch}'[select diff hunks to remove from the index]' \
      '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
      '(- 1)--[start file arguments]' \
      '(--soft --mixed --hard --merge --keep):: :__git_commits' \
      '(--soft --mixed --hard --merge --keep)*:: :->file' && ret=0

  case $state in
    (file)
      local commit=HEAD
      if [[ -n $line[1] ]] && __git_is_committish $line[1]; then
        commit=$line[1]
      fi
      __git_tree_files ${PREFIX:-.} $commit && ret=0
      ;;
  esac

  return ret
}

(( $+functions[_git-revert] )) ||
_git-revert () {
  _arguments -w -S -s \
    '(-e --edit --no-edit)'{-e,--edit}'[edit the commit before committing the revert]' \
    '(-m --mainline)'{-m+,--mainline=}'[pick which parent is mainline]:parent number' \
    '(-e --edit)--no-edit[do not edit the commit message]' \
    '(-n --no-commit)'{-n,--no-commit}'[do not commit the reversion]' \
    '(-s --signoff)'{-s,--signoff}'[add Signed-off-by line at the end of the commit message]' \
    ': :__git_commits'
}

(( $+functions[_git-rm] )) ||
_git-rm () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -w -C -S -s \
    '(-f --force)'{-f,--force}'[override the up-to-date check]' \
    '(-n --dry-run)'{-n,--dry-run}'[do not actually remove the files, just show if they exist in the index]' \
    '-r[allow recursive removal when a leading directory-name is given]' \
    '--cached[only remove files from the index]' \
    '--ignore-unmatch[exit with 0 status even if no files matched]' \
    '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
    '*:: :->file' && ret=0

  case $state in
    (file)
      if [[ -n ${opt_args[(I)--cached]} ]]; then
        __git_changed-in-index_files && ret=0
      else
        __git_cached_files && ret=0
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-shortlog] )) ||
_git-shortlog () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  local -a revision_options
  __git_setup_revision_options

  # TODO: should take all arguments found in setup_revisions() (probably more
  # or less what git-rev-list takes).
  _arguments -w -C -S -s \
    '(: -)'{-h,--help}'[print a short usage message and exit]' \
    '(-n --numbered)'{-n,--numbered}'[sort according to number of commits]' \
    '(-s --summary)'{-s,--summary}'[suppress commit description]' \
    '(-e --email)'{-e,--email}'[show email addres of each author]' \
    '-w-[linewrap the output]:: :->wrap' \
    $revision_options \
    '*: :__git_commits' && ret=0

  case $state in
    (wrap)
      if [[ -prefix [[:digit:]]#,[[:digit:]]#,[[:digit:]]# ]]; then
        compset -P '[[:digit:]]#,[[:digit:]]#,'
        __git_guard_number 'indent of second and subsquent wrapped lines'
      elif [[ -prefix [[:digit:]]#,[[:digit:]]# ]]; then
        compset -P '[[:digit:]]#,'
        compset -S ',[[:digit:]]#'
        __git_guard_number 'indent of first wrapped line'
      else
        compset -S ',[[:digit:]]#,[[:digit:]]#'
        __git_guard_number 'line width'
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-show] )) ||
_git-show () {
  local curcontext=$curcontext state line ret=1
  typeset -A opt_args

  local -a log_options revision_options
  __git_setup_log_options
  __git_setup_revision_options

  _arguments -w -C -s \
    $log_options \
    $revision_options \
    '*:: :->object' && ret=0

  case $state in
    (object)
      _alternative \
        'commits::__git_commits' \
        'tags::__git_tags' \
        'trees::__git_trees' \
        'blobs::__git_blobs' && ret=0
      ;;
  esac

  return ret
}

(( $+functions[_git-stash] )) ||
_git-stash () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -C \
    ': :->command' \
    '*:: :->option-or-argument' && ret=0

  case $state in
    (command)
      local -a commands

      commands=(
        save:'save your local modifications to a new stash'
        list:'list the stashes that you currently have'
        show:'show the changes recorded in the stash as a diff'
        pop:'remove and apply a single stashed state from the stash list'
        apply:'apply the changes recorded in the stash'
        branch:'branch off at the commit at which the stash was originally created'
        clear:'remove all the stashed states'
        drop:'remove a single stashed state from the stash list'
        create:'create a stash without storing it in the ref namespace')

      _describe -t commands command commands && ret=0
      ;;
    (option-or-argument)
      curcontext=${curcontext%:*}-$line[1]:

      case $line[1] in
        (save)
          _arguments -S \
            '(--keep-index)--patch[interactively select hunks from diff between HEAD and working tree to stash]' \
            '(             --no-keep-index)--keep-index[all changes already added to the index are left intact]' \
            '(--keep-index                )--no-keep-index[all changes already added to the index are undone]' \
            '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
            '::message' && ret=0
          ;;
        (list)
          local -a log_options revision_options
          __git_setup_log_options
          __git_setup_revision_options

          _arguments -s -w \
            $log_options \
            $revision_options && ret=0
          ;;
        (show)
          local diff_options
          __git_setup_diff_options

          _arguments -S -s -w \
            $diff_options \
            ':: :__git_stashes' && ret=0
          ;;
        (pop|apply)
          _arguments \
            '--index[try to reinstate the changes added to the index as well]' \
            '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
            ':: :__git_stashes' && ret=0
          ;;
        (branch)
          _arguments \
            ': :__git_guard_branch-name' \
            ':: :__git_stashes' && ret=0
          ;;
        (clear)
          _nothing
          ;;
        (drop)
          _arguments \
            '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
            ':: :__git_stashes' && ret=0
          ;;
        (create)
          _nothing
          ;;
        (*)
          _nothing
          ;;
      esac
      ;;
  esac

  return ret
}

(( $+functions[_git-status] )) ||
_git-status () {
  local -a branch_opts

  if (( $words[(I)-s|--short] )); then
    branch_opts=('(-b --branch)'{-b,--branch}'[show branch and tracking info]')
  fi

  _arguments -w -S -s \
    '(-s --short)'{-s,--short}'[output in short format]' \
    $branch_opts \
    '(-s --short)--porcelain[produce machine-readable output]' \
    '(-u --untracked-files)'{-u-,--untracked-files=-}'[show untracked files]::mode:((no\:"show no untracked files" \
                                                                                     normal\:"show untracked files and directories" \
                                                                                     all\:"also show untracked files in untracked directories (default)"))' \
    '--ignore-submodules[ignore changes to submodules]:: :__git_ignore_submodules_whens' \
    '(--porcelain)-z[use NUL termination on output]' \
    '*: :__git_ignore_line_inside_arguments _files'
}

(( $+functions[_git-submodule] )) ||
_git-submodule () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -C -A '-*' \
    '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
    ': :->command' \
    '*:: :->option-or-argument' && ret=0

  case $state in
    (command)
      declare -a commands

      commands=(
        add:'add given repository as a submodule'
        status:'show the status of a submodule'
        init:'initialize a submodule'
        update:'update a submodule'
        summary:'show commit summary between given commit and working tree/index'
        foreach:'evaluate shell command in each checked-out submodule'
        sync:'synchronize submodule settings')

      _describe -t commands command commands && ret=0
      ;;
    (option-or-argument)
      curcontext=${curcontext%:*}-$line[1]:

      case $line[1] in
        (add)
          # TODO: Second argument should only complete relative paths inside
          # the current repository.
          _arguments -S \
            '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
            '(-b --branch)'{-b,--branch}'[branch of repository to add as submodule]' \
            '(-f --force)'{-f,--force}'[allow adding an otherwise ignored submodule path]' \
            '--reference=[remote repository to clone]: :__git_any_repositories' \
            ': :__git_any_repositories' \
            ':: :_directories' && ret=0
          ;;
        (status)
          _arguments -S \
            '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
            '--cached[use commit stored in the index]' \
            '--recursive[traverse submodules recursively]' \
            '*: :__git_ignore_line_inside_arguments __git_submodules' && ret=0
          ;;
        (init)
          _arguments -S \
            '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
            '*: :__git_ignore_line_inside_arguments __git_submodules' && ret=0
          ;;
        (update)
          # TODO: --init not properly documented.
          _arguments -S \
            '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
            '(-N --no-fetch)'{-N,--no-fetch}'[do not fetch new objects from repository]' \
            '--merge[merge commit recorded in superproject into current branch of submodule]' \
            '--rebase[rebase current branch onto commit recorded in superproject]' \
            '--reference=[remote repository to clone]: :__git_any_repositories' \
            '--recursive[traverse submodules recursively]' \
            '--init[initialize uninitialized submodules]' \
            '*: :__git_ignore_line_inside_arguments __git_submodules' && ret=0
          ;;
        (summary)
          _arguments -C -A '-*' \
            '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
            '--cached[use commit stored in the index]' \
            '--files[compare commit in index with submodule HEAD commit]' \
            '(-n --summary-limit)'{-n,--summary-limit}'[limit summary size]: :__git_guard_number "limit"' \
            '(-)--[start submodule arguments]' \
            '*:: :->commit-or-submodule' && ret=0

          case $state in
            (commit-or-submodule)
              if (( CURRENT == 1 )) && [[ -z ${opt_args[(I)--]} ]]; then
                _alternative \
                  'commits::__git_commits' \
                  'submodules::__git_submodules' && ret=0
              else
                __git_ignore_line __git_submodules && ret=0
              fi
              ;;
          esac
          ;;
        (foreach)
          _arguments -S \
            '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
            '--recursive[traverse submodules recursively]' \
            '(-):command: _command_names -e' \
            '*::arguments: _normal' && ret=0
          ;;
        (sync)
          _arguments -S \
            '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
            '*: :__git_ignore_line_inside_arguments __git_submodules' && ret=0
          ;;
        (*)
          _nothing
          ;;
      esac
      ;;
  esac

  return ret
}

(( $+functions[_git-tag] )) ||
_git-tag () {
  local -a message_opts

  if (( words[(I)-[asu]] )); then
    message_opts=(
      '(   -F)-m+[specify tag message]:message'
      '(-m   )-F+[read tag message from given file]:message file:_files')
  fi

  _arguments -A '-*' \
    - creation \
      '(   -s -u)-a[create an unsigned, annotated tag]' \
      '(-a    -u)-s[create an signed and annotated tag]' \
      '(-a -s   )-u[create a tag, annotated and signed with the given key]: :__git_gpg_secret_keys' \
      '-f[replace existing tag]' \
      $message_opts \
      ': :__git_tags' \
      ':: :__git_commits' \
    - deletion \
      '-d[delete tags]' \
      '*:: :__git_ignore_line_inside_arguments __git_tags' \
    - listing \
      '-n+[limit line output of annotation]: :__git_guard_number "limit"' \
      '-l[list tags matching pattern]' \
      '--contains=[only list tags which contain the specified commit]: :__git_commits' \
      '::pattern' \
    - verification \
      '-v[verifies gpg signutare of tags]' \
      '*:: :__git_ignore_line_inside_arguments __git_tags'
}

(( $+functions[_gitk] )) ||
_gitk () {
  _git-log
}

(( $+functions[_tig] )) ||
_tig () {
  _git-log
}

# Ancillary Commands (Manipulators)

(( $+functions[_git-config] )) ||
_git-config () {
  local name_arg value_arg
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  if (( words[(I)--get-regexp] )); then
    name_arg=':name regex'
  elif (( words[(I)--get-colorbool] )); then
    name_arg=':: :->is-a-tty'
  elif (( words[(I)--get-color] )); then
    name_arg='::default'
  elif (( words[(I)--remove-section|--rename-section] )); then
    name_arg=': :->section'
  elif (( words[(I)--get|--get-all] )); then
    name_arg=': :->gettable-option'
  else
    name_arg=': :->option'
  fi

  if (( words[(I)--rename-section] )); then
    value_arg=': :->section'
  else
    value_arg=': :->value'
  fi

  # TODO --local is undocumented.
  _arguments -w -C -S -s \
    '(         --system --local -f --file)--global[use user-global config file]' \
    '(--global          --local -f --file)--system[use system-wide config file]' \
    '(--global --system         -f --file)--local[use local config file]' \
    '(--global --system -f --file)'{-f+,--file=}'[use given config file]:config file:_files' \
    '(       --int --bool-or-int --path)--bool[setting is a boolean]' \
    '(--bool       --bool-or-int --path)--int[setting is an integer]' \
    '(--bool --int               --path)--bool-or-int[setting is an integer]' \
    '(--bool --int --bool-or-int       )--path[setting is a path]' \
    '(-z --null)'{-z,--null}'[end values with NUL and newline between key and value]' \
    $name_arg \
    $value_arg \
    '::value regex' \
    - '(actions)' \
      '(-z --null)--replace-all[replace all values of the given key]' \
      '(3 -z --null)--add[add new value without altering any existing ones]' \
      '(2)--get[get the first matching value of the key]' \
      '(2)--get-all[get all matching values of the key]' \
      '(3 --bool --int --bool-or-int --path -z --null)--remove-section[remove the given section]' \
      '(3 --bool --int --bool-or-int --path -z --null)--rename-section[rename the given section]'  \
      '(2 --bool --int --bool-or-int --path -z --null)--unset[remove the first matching value of the key]' \
      '(2 --bool --int --bool-or-int --path -z --null)--unset-all[remove all matching values of the key]' \
      '(: --bool --int --bool-or-int --path)'{-l,--list}'[list all variables set in config file]' \
      '(2)--get-regexp[like "--get-all", but interpret "name" as a regular expression]' \
      '(2 3 --bool --int --bool-or-int --path -z --null)--get-colorbool[check if color should be used]: :->gettable-colorbool-option' \
      '(2 3 --bool --int --bool-or-int --path -z --null)--get-color[find color setting]: :->gettable-color-option' \
      '(-e --edit --bool --int --bool-or-int --path -z --null)'{-e,--edit}'[open config file for editing]' && ret=0

  # TODO: Most all _path_commands should be able to take arguments and so on.
  # How do we deal with that and how do we quote the whole argument to git
  # config?
  # TODO: Add merge.*.(name|driver|recursive) and diff.*.(command|funcname)
  # (see gitattributes(5)).
  # TODO: .path options should take absolute paths.
  declare -a git_options_static
  git_options_static=(
    advice.pushNonFastForward:'show advice when git push refuses non-fast-forward refs::->bool:true'
    advice.statusHints:'show advice in output of git status::->bool:true'
    advice.commitBeforeMerge:'show advice when git merge refuses to merge::->bool:true'
    advice.resolveConflict:'show advice when conflict prevents operation from being performed::->bool:true'
    advice.implicitIdentity:'show advice when identity is guessed from system settings::->bool:true'
    advice.detachedHead:'show advice when entering detached-HEAD state::->bool:true'
    blame.blankboundary:'show blank SHA-1 for boundary commits::->bool:false'
    blame.showroot:'show root commits as normal commits::->bool:false'
    blame.date:'date format to use in output::__git_date_formats:iso'
    core.fileMode:'track changes to the executable bit of files::->bool:true'
    core.ignoreCygwinFSTricks:'use Cygwin stat()/lstat()::->bool:true'
    core.ignorecase:'use workarounds for non-case-sensitive filesystems::->bool:false'
    core.trustctime:'trust inode change time::->bool:true'
    core.quotepath:'escape characters in paths on output::->bool:false'
    core.eol:'line ending type::->core.eol:native'
    core.safecrlf:'verify that CRLF conversion is reversible::->core.safecrlf:false'
    core.autocrlf:'convert CRLFs to and from system specific::->core.autocrlf:false'
    core.symlinks:'create symbolic links for indexed symbolic links upon creation::->bool:true'
    core.gitProxy:'command to execute to establish a connection to remote server:proxy command:_path_commands'
    core.ignoreStat:'ignore modification times of files::->bool:false'
    core.preferSymlinkRefs:'use symbolic links for symbolic-reference files::->bool:false'
    core.bare:'use a repository without a working tree::->bool:false'
    core.worktree:'path to the root of the work tree:work tree:_directories'
    core.logAllRefUpdates:'log updates of references::->bool:true'
    core.repositoryFormatVersion:'internal variable determining the repository version:version:->string'
    core.sharedRepository:'what kind of sharing is done for this repository::->permission:false'
    core.warnAmbiguousRefs:'warn if a ref name is ambiguous::->bool:true'
    core.compression:'level of compression to apply to packs::->compression:-1'
    core.loosecompression:'level of compression to apply to non-pack files::->compression:1'
    core.packedGitWindowSize:'size of mappings of pack files:pack window size:->bytes'
    core.packedGitLimit:'maximum number of bytes to map from pack files:maximum pack file map size:->bytes'
    core.deltaBaseCacheLimit:'maximum size of cache for base objects:maximum base objects cache size:->bytes:16m'
    core.bigFileThreshold:'maximum size of files to compress:maximum compress size:->bytes:512m'
    core.excludesfile:'additional file to use for exclusion:excludes file:_files'
    core.askpass:'program to use for asking for passwords:password command:_path_commands'
    core.editor:'editor to use for editing messages:editor:_path_commands'
    core.pager:'pager to use for paginating output:pager:_path_commands'
    core.whitespace:'list of common whitespace problems to notice::->core.whitespace'
    core.fsyncobjectfiles:'fsync() when writing object files::->bool:false'
    core.preloadindex:'use parallel index preload for operations like git diff::->bool:false'
    core.createObject:'take steps to prevent overwriting existing objects::->core.createObject:link'
    core.notesRef:'show notes in given refs:refs:->string:refs/notes/commits'
    core.sparseCheckout:'use sparse checkout::->bool:false'
    add.ignore-errors:'ignore indexing errors when adding files::->bool:false'
    am.keepcr:'keep CR characters when splitting mails::->bool:false'
    apply.ignorewhitespace:'ignore whitespace changes::->apply.ignorewhitespace:no'
    apply.whitespace:'default value for the --whitespace option::->apply.whitespace:error'
    branch.autosetupmerge:'set up new branches for git pull::->bool:true'
    branch.autosetuprebase:'rebase new branches of merge for autosetupmerge::->branch.autosetuprebase:never'
    'branch.*.remote:what remote git fetch and git push should fetch form/push to::__git_remotes'
    'branch.*.merge:default refspec to be marked for merging::__git_ref_specs'
    'branch.*.mergeoptions:default options for merging::->branch.mergeoptions'
    'branch.*.rebase:rebase on top of fetched branch::->bool:false'
    'browser.*.cmd:browser command to use:browser:_path_commands'
    'browser.*.path:path to use for the browser:absolute browser path:_files -g "*(*)"'
    clean.requireForce:'require --force for git clean to actually do something::->bool:true'
    color.branch:'color output of git branch::->color-bool'
    color.branch.current:'color of the current branch::->color'
    color.branch.local:'color of a local branch::->color'
    color.branch.remote:'color of a remote branch::->color'
    color.branch.plain:'color of other branches::->color'
    color.diff:'color output of git diff::->color-bool'
    color.diff.plain:'color of context text::->color'
    color.diff.meta:'color of meta-information::->color'
    color.diff.frag:'color of hunk headers::->color'
    color.diff.func:'color of function in hunk header::->color'
    color.diff.old:'color of removed lines::->color'
    color.diff.new:'color of added lines::->color'
    color.diff.commit:'color of commit headers::->color'
    color.diff.whitespace:'color of whitespace errors::->color'
    color.decorate.branch:'color of branches::->color'
    color.decorate.remoteBranch:'color of remote branches::->color'
    color.decorate.tag:'color of tags::->color'
    color.decorate.stash:'color of stashes::->color'
    color.decorate.HEAD:'color of HEAD::->color'
    color.grep:'whether or not to color output of git grep::->color-bool'
    color.grep.context:'color of non-matching text in context lines::->color'
    color.grep.filename:'color of filename prefix::->color'
    color.grep.function:'color of function name lines::->color'
    color.grep.linenumber:'color of line number prefix::->color'
    color.grep.match:'color of matching text::->color'
    color.grep.selected:'color of non-matching text in selected lines::->color'
    color.grep.separator:'color of separators between fields in a line::->color'
    color.interactive:'whether or not to color in interactive mode::->color-bool'
    color.interactive.prompt:'color of prompt::->color'
    color.interactive.header:'color of header::->color'
    color.interactive.help:'color of help::->color'
    color.interactive.error:'color of error::->color'
    color.pager:'feed colored output to pager::->bool:true'
    color.showbranch:'color output of git show-branch::->color-bool'
    color.status:'color output of git status::->color-bool'
    color.status.header:'color of header text::->color'
    color.status.added:'color of added, but not yet committed, files::->color'
    color.status.updated:'color of updated, but not yet committed, files::->color'
    color.status.changed:'color of changed, but not yet added in the index, files::->color'
    color.status.untracked:'color of files not currently being tracked::->color'
    color.status.nobranch:'color of no-branch warning::->color'
    color.ui:'color output of capable git commands::->color-bool'
    commit.status:'include status information in commit message template::->bool:true'
    commit.template:'template file for commit messages:template:_files'
    diff.autorefreshindex:'run git update-index --refresh before git diff::->bool:true'
    diff.external:'command to generate diff with:diff command:_path_commands'
    diff.mnemonicprefix:'use mnemonic source and destination prefixes::->bool:false'
    diff.noprefix:'strip source and destination prefixes::->bool:false'
    diff.renameLimit:'number of files to consider when detecting copy/renames:rename limit:->int'
    diff.renames:'try to detect renames::->diff.renames:true'
    diff.ignoreSubmodules:'ignore submodules::->bool:false'
    diff.suppressBlankEmpty:'inbihit printing space before empty output lines::->bool:false'
    diff.tool:'diff tool to use::__git_difftools'
    'difftool.*.cmd:command to invoke for the diff tool::_path_commands'
    'difftool.*.path:path to use for the diff tool:absolute diff tool path:_files -g "*(*)"'
    difftool.prompt:'prompt before each invocation of the diff tool::->bool:true'
    diff.wordRegex:'regex used to determine what a word is when performing word-by-word diff:regex:->string'
    diff.guitool:'diff tool with gui to use::__git_difftools'
    fetch.unpackLimit:'maximum number of objects to unpack when fetching:unpack limit:->int'
    format.attach:'use multipart/mixed attachments::->bool:false'
    format.numbered:'use sequence numbers in patch subjects::->format.numbered:auto'
    format.headers:'additional email headers to include in email patches:headers:->string'
    format.to:'additional email recipients of patches::->string'
    format.cc:'additional carbon-copy email recipients of patches:recipients:->string'
    format.subjectprefix:'prefix to use for subjects:prefix:->string'
    format.signature:'signature to use:signature:->string'
    format.suffix:'default suffix for output files from git-format-patch:suffix:->string'
    format.pretty:'pretty format for log/show/whatchanged:format:->string'
    format.thread:'threading style to use::->format.thread:false'
    format.signoff:'enable --signoff by default::->bool:false'
    'gc.*.reflogexpire:grace period for git reflog expire::->days:90'
    'gc.*.reflogexpireunreachable:grace period for git reflog expire for unreachable entries::->days:30'
    gc.aggressiveWindow:'window size used in delta compression algorithm:->int:250'
    gc.auto:'minimum limit for packing loose objects with --auto::->int:6700'
    gc.autopacklimit:'minimum limit for packing packs with --auto::->int:50'
    gc.packrefs:'allow git gc to run git pack-refs::->gc.packrefs:true'
    gc.pruneexpire:'grace period for pruning::->days+now'
    gc.reflogexpire:'grace period for git reflog expire::->days:90'
    gc.reflogexpireunreachable:'grace period for git reflog expire for unreachable entries::->days:30'
    gc.rerereresolved:'number of days to keep records of resolved merges::->days:60'
    gc.rerereunresolved:'number of days to keep records of unresolved merges::->days:15'
    gitcvs.commitmsgannotation:'string to append to each commit message::->string'
    gitcvs.enabled:'enable the cvs server interface::->bool:false'
    gitcvs.logfile:'name of log file for cvs pserver:log file:_files'
    gitcvs.dbname:'name of database to use:database name:->string'
    gitcvs.dbdriver:'name of DBI driver to use::->gitcvs.dbdriver:SQLite'
    gitcvs.dbuser:'username to connect to database as:database user:_users'
    gitcvs.dbpass:'password to use when connecting to database:password:->string'
    gitcvs.dbTableNamePrefix:'database table name prefix:prefix:->string'
    'gitcvs.*.commitmsgannotation:string to append to each commit message:annotation:->string'
    'gitcvs.*.enabled:enable the cvs server interface::->bool:false'
    'gitcvs.*.logfile:name of log file for cvs pserver:log file:_files'
    'gitcvs.*.dbname:name of database to use:database name:->string'
    'gitcvs.*.dbdriver:name of DBI driver to use:DBI driver:->string'
    'gitcvs.*.dbuser:username to connect to database as::_users'
    'gitcvs.*.dbpass:password to use when connecting to database:password:->string'
    'gitcvs.*.dbTableNamePrefix:database table name prefix:prefix:->string'
    gitcvs.usecrlfattr:'use end-of-line conversion attributes::->bool:false'
    gitcvs.allbinary:'treat all files from CVS as binary::->bool:false'
    gui.commitmsgwidth:'width of commit message window:width:->int:75'
    gui.diffcontext:'number of context lines used in diff window:context:->int:5'
    gui.encoding:'encoding to use for displaying file contents::->encoding'
    gui.matchtrackingbranch:'create branches that track remote branches::->bool:false'
    gui.newbranchtemplate:'suggested name for new branches:template:->string'
    gui.pruneduringfetch:'prune tracking branches when performing a fetch::->bool:false'
    gui.trustmtime:'trust file modification timestamp::->bool:false'
    gui.spellingdictionary:'dictionary to use for spell checking commit messages:dictionary:_files'
    gui.fastcopyblame:'try harder during blame detection::->bool:false'
    gui.copyblamethreshold:'threshold to use in blame location detection:threshold:->string'
    gui.blamehistoryctx:'specify radius of history context in days for selected commit::->days'
    guitool.cmd:'shell command line to execute::_path_commands'
    guitool.needsfile:'require that a diff is selected for command to be available::->bool:false'
    guitool.noconsole:'suppress command output::->bool:false'
    guitool.norescan:'skip rescanning for changes to the working directory::->bool:false'
    guitool.confirm:'show a confirmation dialog::->bool:false'
    guitool.argprompt:'prompt for arguments:argument prompt:->string'
    guitool.revprompt:'prompt for a single revision:revision prompt:->string'
    guitool.revunmerged:'show only unmerged branches in revprompt::->bool:false'
    guitool.title:'title of prompt dialog:prompt title:->string'
    guitool.prompt:'prompt to display:prompt:->string'
    help.browser:'browser used to display help in web format::__git_browsers'
    help.format:'default help format used by git help::->help.format'
    help.autocorrect:'execute corrected mistyped commands::->bool:false'
    http.proxy:'HTTP proxy to use:proxy:_urls'
    http.sslVerify:'verify the SSL certificate for HTTPS::->bool:true'
    http.sslCert:'file containing SSL certificates for HTTPS:SSL certificate file:_files'
    http.sslKey:'file containing the SSL private key for HTTPS:SSL private key file:_files'
    http.sslCertPasswordProtected:'prompt for a password for the SSL certificate::->bool:false'
    http.sslCAInfo:'file containing CA certificates to verify against for HTTPS:CA certificates file:_files'
    http.sslCAPath:'directory containing files with CA certificates to verify against for HTTPS:CA certificates directory:_directories'
    http.maxRequests:'how many HTTP requests to launch in parallel:maximum number of requests:->int:5'
    http.minSessions:'number of curl sessions to keep across requests:mininmum number of sessions:->int:1'
    http.postBuffer:'maximum size of buffer used by smart HTTP transport when POSTing:maximum POST buffer size:->bytes:1m'
    http.lowSpeedLimit:'lower limit for HTTP transfer-speed:low transfer-speed limit:->int'
    http.lowSpeedTime:'duration for http.lowSpeedLimit:time:->int'
    http.noEPSV:'disable the use of the EPSV ftp-command::->bool:false'
    http.useragent:'user agent presented to HTTP server:user agent string:->string'
    http.getanyfile:'allow clients to read any file within repository::->bool:true'
    http.uploadpack:'serve git fetch-pack and git ls-remote clients::->bool:true'
    http.receivepack:'serve git send-pack clients::->bool:true'
    i18n.commitEncoding:'character encoding commit messages are stored in::->encoding'
    i18n.logOutputEncoding:'character encoding commit messages are output in::->encoding'
    imap.folder:'IMAP folder to use with git imap-send:IMAP folder name::_mailboxes'
    imap.tunnel:'tunneling command to use for git imap-send:tunnel command:_path_commands'
    imap.host:'host git imap-send should connect to::_hosts'
    # TODO: If imap.host is set, complete users on that system.
    imap.user:'user git imap-send should log in as::_users'
    imap.pass:'password git imap-send should use when logging in:password:->string'
    imap.port:'port git imap-send should connect on::_ports'
    imap.sslverify:'verify server certificate::->bool:true'
    imap.preformattedHTML:'use HTML encoding when sending a patch::->bool:false'
    imap.authMethod:'authentication method used::->imap.authMethod'
    init.templatedir:'directory from which templates are copied:template directory:_directories'
    instaweb.browser:'browser to use when browsing with gitweb::__git_browsers'
    instaweb.httpd:'HTTP-daemon command-line to execute for instaweb:daemon:_path_commands'
    instaweb.local:'bind to 127.0.0.1::->bool:false'
    instaweb.modulepath:'module path for the Apache HTTP-daemon for instaweb:module directory:_directories'
    instaweb.port:'port to bind HTTP daemon to for instaweb::_ports'
    interactive.singlekey:'accept one-letter input without Enter::->bool:false'
    log.date:'default date-time mode::__git_date_formats'
    log.decorate:'type of ref names to show::__git_log_decorate_formats'
    log.showroot:'show initial commit as a diff against an empty tree::->bool:true'
    mailinfo.scissors:'remove everything in body before a scissors line::->bool:false'
    mailmap.file:'augmenting mailmap file:mailmap file:_files'
    man.viewer:'man viewer to use for help in man format::__git_man_viewers'
    'man.*.cmd:the command to invoke the specified man viewer:man command:_path_commands'
    'man.*.path:path to use for the man viewer:absolute man tool path:_files -g "*(*)"'
    merge.conflictstyle:'style used for conflicted hunks::->merge.conflictstyle:merge'
    merge.log:'include summaries of merged commits in new merge commit messsages::->bool:false'
    merge.renameLimit:'number of files to consider when detecting copy/renames during merge:limit:->int'
    merge.renormalize:'use canonical representation of files during merge::->bool:false'
    merge.stat:'print the diffstat between ORIG_HEAD and merge at end of merge::->bool:true'
    merge.tool:'tool used by git mergetool during merges::__git_mergetools'
    merge.verbosity:'amount of output shown by recursive merge strategy::->merge.verbosity:2'
    'merge.*.name:human-readable name for custom low-level merge driver:name:->string'
    'merge.*.driver:command that implements a custom low-level merge driver:merge command:_path_commands'
    'merge.*.recursive:low-level merge driver to use when performing internal merge between common ancestors::__git_builtin_merge_drivers'
    'mergetool.*.path:path to use for the merge tool:absolute merge tool path:_files -g "*(*)"'
    'mergetool.*.cmd:command to invoke for the merge tool:merge command:_path_commands'
    'mergetool.*.trustExitCode:trust the exit code of the merge tool::->bool:false'
    mergetool.keepBackup:'keep the original file with conflict markers::->bool:true'
    mergetool.keepTemporaries:'keep temporary files::->bool:false'
    mergetool.prompt:'prompt before each invocation of the merge tool::->bool:true'
    notes.displayRef:'refname to show notes from::->refname'
    notes.rewrite.amend:'copy notes from original to rewritten commit when running git amend::->bool:true'
    notes.rewrite.rebase:'copy notes from original to rewritten commit when running git rebase::->bool:true'
    notes.rewriteMode:'what to do when target commit already has a not when rewriting::->notes.rewriteMode'
    notes.rewriteRef:'refname to use when rewriting::->refname'
    pack.window:'size of window:window size:->int:10'
    pack.depth:'maximum delta depth:maximum delta depth:->int:50'
    pack.windowMemory:'window size limit:maximum window size:->bytes:0'
    pack.compression:'compression level::->compression:-1'
    pack.deltaCacheSize:'maximum amount of memory for caching deltas:maximum delta cache size:->bytes:256m'
    pack.deltaCacheLimit:'maximum size of deltas:maximum delta size:->int:1000'
    pack.threads:'number of threads to use for searching for best delta matches:number of threads:->int'
    pack.indexVersion:'default pack index version:index version:->string'
    pack.packSizeLimit:'maximum size of packs:maximum size of packs:->bytes'
    pull.octopus:'default merge strategy to use when pulling multiple branches::__git_merge_strategies'
    pull.twohead:'default merge strategy to use when pulling a single branch::__git_merge_strategies'
    push.default:'action git push should take if no refspec is given::->push.default'
    rebase.stat:'show a diffstat of what changed upstream since last rebase::->bool:false'
    rebase.autosquash:'autosquash by default::->bool:false'
    receive.autogc:'run git gc --auto after receiving data::->bool:true'
    receive.fsckObjects:'check all received objects::->bool:true'
    receive.unpackLimit:'maximum number of objects received for unpacking into loose objects:unpack limit:->int'
    receive.denyDeletes:'deny a ref update that deletes a ref::->bool:false'
    receive.denyDeleteCurrent:'deny a ref update that deletes currently checked out branch::->bool:false'
    receive.denyCurrentBranch:'deny a ref update of currently checked out branch::->receive.denyCurrentBranch'
    receive.denyNonFastForwards:'deny a ref update that is not a fast-forward::->bool:false'
    receive.updateserverinfo:'run git update-server-info after receiving data::->bool:false'
    'remote.*.url:URL of a remote repository::__git_any_repositories'
    'remote.*.pushurl:push URL of a remote repository::__git_any_repositories'
    'remote.*.proxy:URL of proxy to use for a remote repository::_urls'
    'remote.*.fetch:default set of refspecs for git fetch::__git_ref_specs'
    'remote.*.push:default set of refspecs for git push::__git_ref_specs'
    'remote.*.mirror:push with --mirror::->bool:false'
    'remote.*.skipDefaultUpdate:skip this remote by default::->bool:false'
    'remote.*.skipFetchAll:skip this remote by default::->bool:false'
    'remote.*.receivepack:default program to execute on remote when pushing:git receive-pack command:_path_commands'
    'remote.*.uploadpack:default program to execute on remote when fetching:git upload-pack command:_path_commands'
    'remote.*.tagopt:options for retrieving remote tags::->remote.tagopt'
    'remote.*.vcs:interact with the remote through git-remote helper:remote VCS:->string'
    repack.usedeltabaseoffset:'use delta-base offsets::->bool:true'
    rerere.autoupdate:'update index after resolution::->bool:false'
    rerere.enabled:'record resolved conflicts::->bool'
    sendemail.smtpencryption:'encryption method to use::->sendemail.smtpencryption'
    sendemail.aliasesfile:'file containing email aliases:email aliases file:_files'
    sendemail.aliasfiletype:'format of aliasesfile::->sendemail.aliasfiletype'
    sendemail.bcc:'value of Bcc\: header::_email_addresses'
    sendemail.cc:'value of Cc\: header::_email_addresses'
    sendemail.cccmd:'command to generate Cc\: header with:Cc\: command:_path_commands'
    sendemail.chainreplyto:'send each email as a reply to the previous one::->bool:false'
    sendemail.confirm:'type of confirmation required before sending::->sendemail.confirm:auto'
    sendemail.envelopesender:'envelope sender to send emails as::_email_addresses'
    sendemail.from:'sender email address::_email_addresses'
    sendemail.multiedit:'edit all files at once::->bool:false'
    sendemail.signedoffbycc:'add Signed-off-by\: or Cc\: lines to Cc\: header::->bool:true'
    sendemail.smtppass:'password to use for SMTP-AUTH:password:->string'
    sendemail.suppresscc:'rules for suppressing Cc\:::->sendemail.suppresscc'
    sendemail.suppressfrom:'add From\: address to the Cc\: list::->bool:false'
    sendemail.to:'value of To\: header::_email_addresses'
    sendemail.smtpdomain:'FQDN to use for HELO/EHLO commands to SMTP server:smtp domain:_domains'
    sendemail.smtpserver:'SMTP server to connect to:smtp host:_hosts'
    sendemail.smtpserverport:'port to connect to SMTP server on:smtp port:_ports'
    sendemail.smtpuser:'user to use for SMTP-AUTH:smtp user:_users'
    sendemail.thread:'set In-Reply-To\: and References\: headers::->bool:true'
    sendemail.validate:'perform sanity checks on patches::->bool:true'
    'sendemail.*.aliasesfile:file containing email aliases::_files'
    'sendemail.*.aliasfiletype:format of aliasesfile::->sendemail.aliasfiletype'
    'sendemail.*.bcc:value of Bcc\: header::_email_addresses'
    'sendemail.*.cc:value of Cc\: header::_email_addresses'
    'sendemail.*.cccmd:command to generate Cc\: header with:Cc\: command:_path_commands'
    'sendemail.*.chainreplyto:send each email as a reply to the previous one::->bool:false'
    'sendemail.*.confirm:type of confirmation required before sending::->sendemail.confirm:auto'
    'sendemail.*.envelopesender:envelope sender to send emails as::_email_addresses'
    'sendemail.*.from:sender email address::_email_addresses'
    'sendemail.*.multiedit:edit all files at once::->bool:false'
    'sendemail.*.signedoffbycc:add Signed-off-by\: or Cc\: lines to Cc\: header::->bool:true'
    'sendemail.*.smtppass:password to use for SMTP-AUTH:password:->string'
    'sendemail.*.suppresscc:rules for suppressing Cc\:::->sendemail.suppresscc'
    'sendemail.*.suppressfrom:rules for suppressing From\:::->sendemail.suppressfrom'
    'sendemail.*.to:value of To\: header::_email_addresses'
    'sendemail.*.smtpdomain:FQDN to use for HELO/EHLO commands to SMTP server:smtp domain:_domains'
    'sendemail.*.smtpserver:SMTP server to connect to:smtp host:_hosts'
    'sendemail.*.smtpserverport:port to connect to SMTP server on:smtp port:_ports'
    'sendemail.*.smtpuser:user to use for SMTP-AUTH:smtp user:_users'
    'sendemail.*.thread:set In-Reply-To\: and References\: headers::->bool:true'
    'sendemail.*.validate:perform sanity checks on patches::->bool:true'
    sendemail.assume8bitEncoding:'encoding to use for non-ASCII messages::__git_encodings'
    showbranch.default:'default set of branches for git show-branch::->branch'
    status.relativePaths:'show paths relative to current directory::->bool:false'
    status.showUntrackedFiles:'show untracked files::->status.showUntrackedFiles:normal'
    status.submodulesummary:'include submodule summary::->bool:false'
    'submodule.*.path:path within project:submodule directory:_directories -qS \:'
    'submodule.*.url:URL to update from::__git_any_repositories'
    'submodule.*.update:update strategy to use::->submodule.update'
    'submodule.*.ignore:ignore modifications to submodules with git status and git diff-*::->submodule.ignore'
    svn.noMetadata:'disable git-svn-id: lines at end of commits::->bool:false'
    svn.useSvmProps:'use remappings of URLs and UUIDs from mirrors::->bool:false'
    svn.useSvnsyncProps:'use remappings of URLs and UUIDs for the svnsync command::->bool:false'
    svn.ignore-paths:'regular expression of paths to not check out:regular expression:->string'
    svn.brokenSymlinkWorkaround:'apply the broken-symlink check::->bool:true'
    svn.pathnameencoding:'encoding to recode pathnames into::->encoding'
    svn.followparent:'follow parent commit::->bool:true'
    svn.authorsFile:'default authors file:authors file:_files'
    svn.quiet:'produce less output::->bool:false'
    'svn-remote.*.noMetadata:disable git-svn-id: lines at end of commits::->bool:false'
    'svn-remote.*.useSvmProps:use remappings of URLs and UUIDs from mirrors::->bool:false'
    'svn-remote.*.useSvnsyncProps:use remappings of URLs and UUIDs for the svnsync command::->bool:false'
    'svn-remote.*.rewriteRoot:alternate root URL to use:root url:_urls'
    'svn-remote.*.rewriteUUID:remap URLs and UUIDs for mirrors manually::->bool:false'
    'svn-remote.*.ignore-paths:regular expression of paths to not check out:regular expression:->string'
    'svn-remote.*.url:URL to connect to::_urls'
    'svn-remote.*.fetch:fetch specification::__git_ref_specs'
    'svn-remote.*.branches:branch mappings:branch mapping:->string'
    'svn-remote.*.tags:tag mappings:tag mapping:->string'
    tar.umask:'umask to apply::->umask'
    transfer.unpackLimit:'default value for fetch.unpackLimit and receive.unpackLimit:unpack limit:->int:100'
    'url.*.insteadOf:string to start URLs with:prefix:->string'
    'url.*.pushInsteadOf:string to start URLs to push to with:prefix:->string'
    user.email:'email address used for commits::_email_addresses'
    user.name:'full name used for commits:name:->string'
    user.signingkey:'default GPG key to use when creating signed tags::__git_gpg_secret_keys'
    web.browser:'web browser to use::__git_browsers')

  case $state in
    (section)
      __git_config_sections -b '(|)' '^' section-names 'section name' $* && ret=0
      ;;
    (is-a-tty)
      declare -a values
      values=(
        true
        false
        auto)
      _describe -t values 'stdout is a tty' values && ret=0
      ;;
    (option)
      local label=option
      declare -a sections sections_and_options options

      [[ -prefix *. ]] && label="${line[1]%.*} option"

      if compset -P '[^.]##.*.'; then
        declare -a match mbegin mend
        options+=(${${${${(M)git_options_static:#(#i)${IPREFIX}[^.:]##:*}#(#i)${IPREFIX}}/#(#b)([^:]##:)([^\\:]#(\\?[^\\:]#)#:[^\\:]#(\\?[^\\:]#)#:->bool)/$match[1]whether or not to $match[2]}/#(#b)([^:]##:([^\\:]#(\\?[^\\:]#)#))*/$match[1]})
        options+=(${${${${(M)git_options_static:#(#i)${IPREFIX%%.*}.\*.[^.:]##:*}#(#i)${IPREFIX%%.*}.\*.}/#(#b)([^:]##:)([^\\:]#(\\?[^\\:]#)#:[^\\:]#(\\?[^\\:]#)#:->bool)/$match[1]whether or not to $match[2]}/#(#b)([^:]##:([^\\:]#(\\?[^\\:]#)#))*/$match[1]})

        declare -a labels
        labels=(
          'branch.*.:${${line[1]#branch.}%.*} branch option'
          'browser.*.:${${line[1]#browser.}%.*} browser option'
          'color.branch.:branch-specific color option'
          'color.diff.:diff-specific color option'
          'color.decorate.:git-log---decorate-specific color option'
          'color.grep.:git-grep-specific color option'
          'color.interactive.:interaction-specific color option'
          'color.status.:git-status-specific color option'
          'difftool.*.:${${line[1]#difftool.}%.*}-specific option'
          'gc.*.:${${line[1]#gc.}%.*}-specific gc option'
          'gitcvs.*.:gitcvs ${${line[1]#gitcvs.}%.*}-specific option'
          'guitool.*.:${${line[1]#gc.}%.*}-specific option'
          'man.*.:${${line[1]#man.}%.*}-specific man option'
          'merge.*.:${${line[1]#merge.}%.*}-specific merge option'
          'mergetool.*.:${${line[1]#mergetool.}%.*}-specific option'
          'sendemail.*.:${${line[1]#sendemail.}%.*}-specific sendemail option'
          'submodule.*.:${${line[1]#submodule.}%.*}-submodule-specific option'
          'url.*.:${${line[1]#url.}%.*}-specific option'
          'svn-remote.*.:git-svn ${${line[1]#svn-remote.}%.*}-specific option')

        local found
        found=${${${(M)labels:#(${IPREFIX}|${IPREFIX%%.*}.\*.):*}[1]}#*:}
        [[ -n $found ]] && label=${(Q)"$(eval "print -rn -- $found")"}
      elif compset -P '[^.]##.'; then
        local opt
        declare -a match mbegin mend
        for opt in ${${${${(M)git_options_static:#(#i)${IPREFIX}[^.:]##:*}#(#i)${IPREFIX}}/#(#b)([^:]##:)([^\\:]#(\\?[^\\:]#)#:[^\\:]#(\\?[^\\:]#)#:->bool)/$match[1]whether or not to $match[2]}/#(#b)([^:]##:([^\\:]#(\\?[^\\:]#)#))*/$match[1]}; do
          if (( ${git_options_static[(I)${opt%%:*}.*]} )); then
            sections_and_options+=$opt
          else
            options+=$opt
          fi
        done

        declare -a subsections
        subsections=(
          'color.decorate:git log --decorate options'
          'gitcvs.ext:ext-connection-method-specific options'
          'gitcvs.pserver:pserver-connection-method-specific options'
          'notes.rewrite:commands to copy notes from original for when rewriting commits')
        sections+=(${${(M)subsections:#${IPREFIX}[^.:]##(.|):*}#${IPREFIX}})

        # TODO: Is it fine to use functions like this before _describe below,
        # or do we need a tag loop?
        # TODO: It would be nice to output _message -e TYPE label when the
        # following functions don’t generate any output in the case of
        # multi-level options.
        case $IPREFIX in
          (alias.)
            __git_aliases && ret=0
            ;;
          (branch.)
            __git_branch_names -S . && ret=0
            ;;
          (browser.)
            __git_browsers -S . && ret=0
            ;;
          (difftool.)
            __git_difftools -S . && ret=0
            ;;
          (gc.)
            __git_config_sections '^gc\..+\.[^.]+$' refpatterns 'ref pattern' -S . && ret=0
            ;;
          (guitool.)
            __git_config_sections '^guitool\..+\.[^.]+$' guitools 'gui tool' -S . && ret=0
            ;;
          (man.)
            __git_man_viewers -S . && ret=0
            ;;
          (merge.)
            __git_merge_drivers -S . && ret=0
            ;;
          (mergetool.)
            __git_mergetools -S . && ret=0
            ;;
          (pager.)
            _git_commands && ret=0
            ;;
          (pretty.)
            __git_config_sections -a '(|)' '^pretty\..+\.[^.]+$' prettys 'pretty format string' && ret=0
            ;;
          (remote.)
            __git_remotes -S . && ret=0
            ;;
          (remotes.)
            __git_remote-groups && ret=0
            ;;
          (sendemail.)
            __git_sendemail_identities -S . && ret=0
            ;;
          (submodule.)
            __git_submodules -S . && ret=0
            ;;
          (url.)
            __git_config_sections '^url\..+\.[^.]+$' bases base -S . && ret=0
            ;;
          (svn-remote.)
            __git_svn-remotes -S . && ret=0
            ;;
        esac
      else
        sections=(
          advice:'options controlling advice'
          core:'options controlling git core'
          add:'git add options'
          alias:'command aliases'
          am:'git am options'
          apply:'git apply options'
          branch:'branch options'
          browser:'browser options'
          clean:'git clean options'
          color:'color options'
          commit:'git commit options'
          diff:'diff options'
          difftool:'difftools'
          fetch:'git fetch options'
          format:'format options'
          gc:'git gc options'
          gitcvs:'git-cvs options'
          gui:'git gui options'
          guitool:'git gui tool options'
          help:'git help options'
          http:'http options'
          i18n:'internationalization options'
          imap:'IMAP options'
          init:'git init options'
          instaweb:'git web options'
          interactive:'options controlling interactivity'
          log:'git log options'
          mailmap:'mailmap options'
          man:'man options'
          merge:'git merge options'
          mergetool:'mergetools'
          notes:'git notes options'
          pack:'options controlling packing'
          pager:'pager options'
          pretty:'pretty formats'
          pull:'git pull options'
          push:'git push options'
          rebase:'git rebase options'
          receive:'git receive options'
          remote:'remotes'
          remotes:'remotes groups'
          repack:'repack options'
          rerere:'git rerere options'
          sendemail:'git send-email options'
          showbranch:'showbranch options'
          status:'git status options'
          submodule:'git submodule options'
          tar:'git tar-tree options'
          transfer:'options controlling transfers'
          url:'URL prefixes'
          user:'options controlling user identity'
          web:'web options'
          svn:'git svn options'
          svn-remote:'git svn remotes')
      fi

      # TODO: Add equivalent of -M 'r:|.=* r:|=*' here so that we can complete
      # b.d.c to browser.dillo.cmd.
      _describe -t option-names $label \
        sections -M 'm:{[:lower:][:upper:]}={[:upper:][:lower:]}' -S . -- \
        sections_and_options -M 'm:{[:lower:][:upper:]}={[:upper:][:lower:]}' -qS . -- \
        options -M 'm:{[:lower:][:upper:]}={[:upper:][:lower:]}' && ret=0
      ;;
    (gettable-option)
      _describe -t git-options option \
        ${${${(0)"$(_call_program gettable-options git config -z --list)"}%%$'\n'*}//:/\\:} && ret=0
      ;;
    (gettable-colorbool-option)
      __git_config_sections -b '(|)' -a '(|)' '^color\.[^.]+$' gettable-colorbool-options option && ret=0
      ;;
    (gettable-color-option)
      __git_config_sections -b '(|)' -a '(|)' '^color\.[^.]+\..*$' gettable-color-options option && ret=0
      ;;
    (value)
      local current=${${(0)"$(_call_program current "git config $opt_args[(I)--system|--global|--local] ${(kv)opt_args[(I)-f|--file]} -z --get '$line[1]'")"}#*$'\n'}
      case $line[1] in
        (alias.*)
          if [[ -n $current ]]; then
            compadd - $current && ret=0
          else
            _message 'command'
          fi
          return
          ;;
        (remotes.*)
          # TODO: Use this strategy for all multi-item values.
          compset -P '* '

          local suffix
          if [[ $words[CURRENT] == [\"\']* ]]; then
            suffix=' '
          else
            suffix='\ '
          fi

          # TODO: Should really only complete unique remotes, that is, not the same
          # remote more than once in the list.
          __git_remotes -S $suffix -q && ret=0
          return ret
          ;;
      esac
      local z=$'\0'
      declare -a parts
      parts=("${(S@0)${git_options_static[(r)(#i)${line[1]}:*]}//(#b)(*[^\\]|):/$match[1]$z}")
      if (( $#parts < 2 )) && [[ $line[1] == [^.]##.*.[^.]## ]]; then
        parts=("${(S@0)${git_options_static[(r)(#i)${line[1]%%.*}.\*.${line[1]##*.}:*]}//(#b)(*[^\\]|):/$match[1]$z}")
      fi
      (( $#parts > 0 )) || return ret
      case $parts[4] in
        ('->'*)
          case ${parts[4]#->} in
            (apply.ignorewhitespace)
              __git_config_values -- "$current" "$parts[5]" \
                {no,false,never,none}':do not ignore whitespace' \
                change:'ignore changes in whitespace' && ret=0
              ;;
            (apply.whitespace)
              __git_apply_whitespace_strategies && ret=0
              ;;
            (bool)
              __git_config_booleans "$current" "$parts[5]" "$parts[2]" && ret=0
              ;;
            (branch)
              __git_branch_names && ret=0
              ;;
            (branch.autosetuprebase)
              __git_config_values -- "$current" "$parts[5]" \
                never:'never set branch.*.rebase to true' \
                local:'set branch.*.rebase to true for tracked branches of local branches' \
                remote:'set branch.*.rebase to true for tracked branches of remote branches' \
                always:'set branch.*.rebase to true for all tracking branches' && ret=0
              ;;
            (branch.mergeoptions)
              # TODO: Complete options to git-merge(1).
              _message 'git-merge options'
              ;;
            (bytes)
              __git_guard_bytes "$parts[2]" && ret=0
              ;;
            (color)
              compset -P '* '

              case ($words[CURRENT]) in
                (?*' '?*' '*)
                  if [[ $words[CURRENT] == *(bold|dim|ul|blink|reverse)* ]]; then
                    __git_colors && ret=0
                  else
                    __git_color_attributes && ret=0
                  fi
                  ;;
                (*)
                  local suffix q_flag
                  if [[ $words[CURRENT] == [\"\']* ]]; then
                    suffix=' '
                    q_flag=-q
                  else
                    suffix='\ '
                  fi

                  if [[ $words[CURRENT] == *(bold|dim|ul|blink|reverse)* ]]; then
                    __git_colors -S $suffix $q_flag && ret=0
                  else
                    _alternative \
                      'colors::__git_colors -S $suffix $q_flag' \
                      'attributes::__git_color_attributes -S $suffix $q_flag' && ret=0
                  fi
                  ;;
              esac
              ;;
            (color-bool)
              __git_config_values -t booleans -l boolean -- "$current" false \
                {never,false,no,off}:"do not $parts[2]" \
                always:"always $parts[2]" \
                {auto,true,yes,on}:$parts[2] && ret=0
              ;;
            (compression)
              __git_compression_levels && ret=0
              ;;
            (core.autocrlf)
              __git_config_booleans "$current" "$parts[5]" "$parts[2]" \
                input:'convert CRLFs on input only' && ret=0
              ;;
            (core.createObject)
              __git_config_values -- "$current" "$parts[5]" \
                rename:'rename source objects' \
                link:'hardlink, then delete source objects' && ret=0
              ;;
            (core.safecrlf)
              __git_config_booleans "$current" "$parts[5]" "$parts[2]" \
                warn:'only warn about irreversible CRLF conversions' && ret=0
              ;;
            (core.whitespace)
              declare -a values

              values=(
                'blank-at-eol[treat whitespace at the end of the line as an error]'
                'space-before-tab[treat space character before tab character in initial indent as an error]'
                'indent-with-non-tab[treat lines indented with 8 or more space characters as an error]'
                'tab-in-indent[treat lines indented with a tab character as an error]'
                'blank-at-eof[treat blank lines at the end of the files as an error]'
                'cr-at-eol[treat carriage-return at the end of the line as part of line terminator]')

              _values -s , $parts[2] $values && ret=0
              ;;
            (days)
              if [[ -n $current ]]; then
                compadd - $current && ret=0
              elif [[ -n $parts[5] ]]; then
                compadd - $parts[5] && ret=0
              else
                __git_guard_number 'number of days'
              fi
              ;;
            (days+now)
              # TODO: This needs to be improved.
              if [[ -n $current ]]; then
                compadd - $current && ret=0
              elif [[ -n $parts[5] ]]; then
                compadd - $parts[5] && ret=0
              else
                __git_guard_number 'number of days'
              fi
              ;;
            (diff.renames)
              __git_config_booleans "$current" "$parts[5]" "$parts[2]" \
                {copies,copy}:'try to detect both renames and copies' && ret=0
              ;;
            (encoding)
              __git_encodings && ret=0
              ;;
            (eol)
              __git_config_values -- "$current" "$parts[5]" \
                lf:'use LF' \
                crlf:'use CR+LF' \
                native:'use line ending of platform' && ret=0
              ;;
            (format.numbered)
              __git_config_booleans "$current" "$parts[5]" "$parts[2]" \
                auto:'use sequence numbers if more than one patch' && ret=0
              ;;
            (format.thread)
              __git_config_booleans "$current" "$parts[5]" "$parts[2]" \
                deep:'make every mail a reply to the previous one' \
                shallow:'make every mail a reply to the first one' && ret=0
              ;;
            (gc.packrefs)
              __git_config_booleans "$current" "$parts[5]" "$parts[2]" \
                notbare:'pack references if the repository has a working directory' && ret=0
              ;;
            (gitcvs.dbdriver)
              # TODO: Would be nice to only include those that are installed, but I
              # couldn’t figure out a good way of doing that when I wrote this code.
              __git_config_values -t dbi-drivers -l 'DBI driver' -- "$current" "$part[5]" \
                SQLite:'use the SQLite database driver' \
                Pg:'use the Pg database driver' && ret=0
              ;;
            (help.format)
              __git_config_values -- "$current" "$parts[5]" \
                man:'use man' \
                info:'use info' \
                {web,html}:'use HTML' && ret=0
              ;;
            (imap.authMethod)
              __git_config_values -- "$current" "$parts[5]" \
                CRAM-MD5:'use CRAM-MD5' && ret=0
              ;;
            (int)
              if [[ -n $current ]]; then
                compadd - $current && ret=0
              elif [[ -n $parts[5] ]]; then
                compadd - $parts[5] && ret=0
              else
                __git_guard_number 'integer'
              fi
              ;;
            (merge.conflictstyle)
              __git_config_values -- "$current" "$parts[5]" \
                merge:'use standard merge style' \
                diff3:'use diff3 style' && ret=0
              ;;
            (merge.verbosity)
              __git_config_values -t verbosity-levels -l 'verbosity level' -- "$current" "$parts[5]" \
                0:'only final error message if conflicts were detected'
                1:'conflicts'
                2:'conflicts and file changes'
                5:'debugging information' && ret=0
              ;;
            (notes.rewriteMode)
              __git_config_values -- "$current" "$parts[5]" \
                overwrite:'overwrite existing notes' \
                concatenate:'add the note to the existing ones' \
                ignore:'ignore the new note' && ret=0
              ;;
            (permission)
              __git_repository_permissions && ret=0
              ;;
            (push.default)
              __git_config_values -- "$current" "$parts[5]" \
                nothing:'do not push anything' \
                matching:'push all matching branches' \
                tracking:'push current branch to its upstream branch' \
                current:'push current branch to branch of same name' && ret=0
              ;;
            (receive.denyCurrentBranch)
              __git_config_values -- "$current" "$parts[5]" \
                {refuse,true,yes,on}:'update ref to current branch of non-bare repository' \
                {warn}:'warn about dangers of pushing, but perform it anyway' \
                {false,no,off}:'do not update ref to current branch of non-bare repository' && ret=0
              ;;
            (remote.tagopt)
              __git_config_values -- "$current" "$parts[5]" \
                --tags:'automatically follow tags' \
                --no-tags:'do not automatically follow tags' && ret=0
              ;;
            (sendemail.aliasfiletype)
              __git_config_values -- "$current" "$parts[5]" \
                elm:'elm(1)' \
                gnus:'gnus(1)' \
                mutt:'mutt(1)' \
                mailrc:'mailrc(5)' \
                pine:'pine(1)' && ret=0
              ;;
            (sendemail.confirm)
              __git_sendemail_confirm_values && ret=0
              ;;
            (sendemail.smtpencryption)
              __git_sendemail_smtpencryption_values && ret=0
              ;;
            (sendemail.suppresscc)
              __git_sendemail_suppresscc_values && ret=0
              ;;
            (status.showUntrackedFiles)
              __git_config_values -- "$current" "$parts[5]" \
                no:'do not show untracked files' \
                normal:'show untracked files and directories' \
                all:'show all individual files in directories' && ret=0
              ;;
            (refname|string)
              # TODO: Something better?
              if [[ -n $current ]]; then
                compadd - $current && ret=0
              elif [[ -n $parts[5] ]]; then
                compadd - $parts[5] && ret=0
              else
              #  _message 'refname'
                _message "${parts[3]:-${parts[2]:-value}}"
              fi
              ;;
            (submodule.ignore)
              __git_config_values -- "$current" "$parts[5]" \
                all:'never consider submodules modified' \
                dirty:'ignore all changes to submodule work tree, only take diff between HEAD and recorded commit' \
                untracked:'show modified tracked files' \
                none:'show modified tracked and untracked files' && ret=0
              ;;
            (umask)
              _alternative \
                'values:value:(user)' \
                'umasks::__git_guard_number umask' && ret=0
              ;;
          esac
          ;;
        (*)
          # TODO: Do we need to set up a _requested/_next_label?
          declare -a action
          local expl
          _description values expl "$parts[2]"
          eval "action=($parts[4])"
          "$action[1]" "$expl[@]" "${(@)action[2,-1]}" && ret=0
          ;;
      esac
      ;;
  esac

  return ret
}

(( $+functions[_git-fast-export] )) ||
_git-fast-export () {
  # TODO: * should be git-rev-arg and git-rev-list arguments.
  _arguments -w -S -s \
    '--progress=[insert progress statements]: :__git_guard_number interval' \
    '--signed-tags=[specify how to handle signed tags]:action:((verbatim\:"silently export"
                                                                warn\:"export, but warn"
                                                                strip\:"export unsigned tags instead"
                                                                abort\:"abort on signed tags (default)"))' \
    '--tag-of-filtered-object=[specify how to handle tags whose tagged object is filtered out]:action:((abort\:"abort on such tags"
                                                                                                        drop\:"omit such tags"
                                                                                                        rewrite\:"tag ancestor commit"))' \
    '-M-[detect moving lines in the file as well]: : :__git_guard_number "number of characters"' \
    '-C-[detect copies as well as renames with given scope]: :__git_guard_number size' \
    '--export-marks=[dump internal marks table when complete]: :_files' \
    '--import-marks=[load marks before processing input]: :_files' \
    '--fake-missing-tagger=[fake a tagger when tags lack them]' \
    '--no-data[do not output blocb objects, instead referring to them via their SHA-1 hash]' \
    '--full-tree[output full tree for each commit]' \
    '*: :__git_commit_ranges'
}

(( $+functions[_git-fast-import] )) ||
_git-fast-import () {
  _arguments -S -A '-*' \
    '--date-format=-[type of dates used in input]:format:((raw\:"native Git format"
                                                           rfc2822\:"standard email format from RFC 2822"
                                                           now\:"use current time and timezone"' \
    '--force[force updating modified existing branches]' \
    '--max-pack-size=-[maximum size of each packfile]: :__git_guard_bytes' \
    '--big-file-threshold=-[maximum size of blob to create deltas for]: :__git_guard_bytes' \
    '--depth=-[maximum delta depth for blob and tree deltification]: :__git_guard_number "maximum delta depth"' \
    '--active-branches=-[maximum number of branches to maintain active at once]: :__git_guard_number "maximum number of branches"' \
    '--export-marks=-[dump internal marks table when complete]: :_files' \
    '--import-marks=-[load marks before processing input]: :_files' \
    '*--relative-marks[paths for export/import are relative to internal directory in current repository]' \
    '*--no-relative-marks[paths for export/import are not relative to internal directory in current repository]' \
    '--export-pack-edges=-[list packfiles and last commit on branches in them in given file]: :_files' \
    '--quiet[disable all non-fatal output]' \
    '--stats[display statistics about object created]'
}

(( $+functions[_git-filter-branch] )) ||
_git-filter-branch () {
  # TODO: --*-filter should take a whole command line.
  # TODO: --original should take subdirectory under .git named refs/* or some
  # such.
  # TODO: * should be git-rev-arg and git-rev-list arguments.
  _arguments -S -A '-*' \
    '--env-filter[filter for modifying environment in which commit will be performed]: :_path_commands' \
    '--tree-filter[filter for rewriting tree and its contents]: :_path_commands' \
    '--index-filter[filter for rewriting index]: :_path_commands' \
    '--parent-filter[filter for rewriting parent list of commit]: :_path_commands' \
    '--msg-filter[filter for rewriting commit messages]: :_path_commands' \
    '--commit-filter[filter for rewriting commit]: :_path_commands' \
    '--tag-name-filter[filter for rewriting tag names]: :_path_commands' \
    '--subdirectory-filter[only look at histor that touches given directory]: :_directories' \
    '--prune-empty[ignore empty generated commits]' \
    '--original[namespace where original commits will be stored]:namespace:_directories' \
    '-d[temporary directory used for rewriting]: :_directories' \
    '(-f --force)'{-f,--force}'[force operation]' \
    '*: :__git_commit_ranges'
}

(( $+functions[_git-mergetool] )) ||
_git-mergetool () {
  # TODO: Only complete files with merge conflicts.
  _arguments -S -A '-*' \
    '(-t --tool)'{-t,--tool=}'[merge resolution program to use]: :__git_mergetools' \
    '(-y --no-prompt --prompt)'{-y,--no-prompt}'[do not prompt before invocation of merge resolution program]' \
    '(-y --no-prompt)--prompt[prompt before invocation of merge resolution program]' \
    '*:conflicted file:_files'
}

(( $+functions[_git-pack-refs] )) ||
_git-pack-refs () {
  _arguments \
    '(      --no-all)--all[pack all refs]' \
    '(--all         )--no-all[do not pack all refs]' \
    '(        --no-prune)--prune[remove loose refs after packing them]' \
    '(--prune           )--no-prune[do not remove loose refs after packing them]'
}

(( $+functions[_git-prune] )) ||
_git-prune () {
  _arguments -S \
    '(-n --dry-run)'{-n,--dry-run}'[do not remove anything; just report what would be removed]' \
    '(-v --verbose)'{-v,--verbose}'[report all removed objects]' \
    '--expire[only expire loose objects older than given date]: :__git_datetimes' \
    '*:: :__git_heads'
}

(( $+functions[_git-reflog] )) ||
_git-reflog () {
  declare -a revision_options
  __git_setup_revision_options

  if [[ $words[2] == --* ]]; then
    _arguments -S \
      $revision_options \
      ':: :__git_references'
  else
    local curcontext=$curcontext state line ret=1
    declare -A opt_args

    # TODO: -h is undocumented.
    _arguments -C -S \
      '(- : *)-h[display usage]' \
      $revision_options \
      ': :->command' \
      '*:: :->option-or-argument' && ret=0

    case $state in
      (command)
        declare -a commands

        commands=(
          'expire:prune old reflog entries'
          'delete:delete entries from reflog'
          'show:show log of ref')

        _describe -t commands command commands && ret=0
        ;;
      (option-or-argument)
        curcontext=${curcontext%:*}-$line[1]:

        case $line[1] in
          (expire)
            # TODO: -n, --dry-run is undocumented.
            _arguments -S \
              '(-n --dry-run)'{-n,--dry-run}'[undocumented]' \
              '--stale-fix[TODO\: provide a decent description for this option]' \
              '--expire=-[prune entries older than given time]: :__git_datetimes' \
              '--expire-unreachable=-[prune entries older than given time and unreachable]: :__git_datetimes' \
              '--all[prune all refs]' \
              '--updateref[update ref with SHA-1 of top reflog entry after expiring or deleting]' \
              '--rewrite[adjust reflog entries to ensure old SHA-1 points to new SHA-1 of previous entry after expring or deleting]' \
              '--verbose[output additional information]' && ret=0
            ;;
          (delete)
            # TODO: -n, --dry-run is undocumented.
            _arguments -C -S \
              '(-n --dry-run)'{-n,--dry-run}'[undocumented]' \
              '--updateref[update ref with SHA-1 of top reflog entry after expiring or deleting]' \
              '--rewrite[adjust reflog entries to ensure old SHA-1 points to new SHA-1 of previous entry after expring or deleting]' \
              '*:: :->reflog-entry' && ret=0

            case $state in
              (reflog-entry)
                # TODO: __git_ignore_line doesn’t work here for some reason.
                __git_ignore_line __git_reflog_entries && ret=0
                ;;
            esac
            ;;
          (show|--*)
            _arguments -S \
              $revision_options \
              ':: :__git_references' && ret=0
            ;;
        esac
    esac

    return ret
  fi
}

(( $+functions[_git-relink] )) ||
_git-relink () {
  # TODO: --help is undocumented.
  _arguments \
    '--safe[stop if two objects with the same hash exist but have different sizes]' \
    '--help[display help]' \
    ': :_directories' \
    ': :_directories' \
    '*: :_directories'
}

(( $+functions[_git-remote] )) ||
_git-remote () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -C \
    '(-v --verbose)'{-v,--verbose}'[show remote url after name]' \
    ': :->command' \
    '*:: :->option-or-argument' && ret=0

  case $state in
    (command)
      declare -a commands

      commands=(
        'add:add a new remote'
        'rename:rename a remote and update all associated tracking branches'
        'rm:remove a remote and all associated tracking branches'
        'set-head:set or delete default branch for a remote'
        'set-branches:change list of branches tracked by a remote'
        'set-url:change URL for a remote'
        'show:show information about a given remote'
        'prune:delete all stale tracking branches for a remote'
        'update:fetch updates for a set of remotes')

      _describe -t commands command commands && ret=0
      ;;
    (option-or-argument)
      curcontext=${curcontext%:*}-$line[1]:

      case $line[1] in
        (add)
          # TODO: -t and --track should really list branches at url.
          _arguments -w -S -s \
            '(-f --fetch)'{-f,--fetch}'[run git fetch on new remote after it has been created]' \
            '(       --no-tags)--tags[tell git fetch to import every tag from remote repository]' \
            '(--tags          )--no-tags[tell git fetch to not import every tag from remote repository]' \
            '*'{-t,--track=}'[track given branch instead of default glob refspec]: :__git_branch_names' \
            '(-m --master)'{-m,--master=}'[set HEAD of remote to point to given master branch]: :__git_branch_names' \
            '--mirror[do not use separate remotes]' \
            ':name:__git_remotes' \
            ':url:_urls' && ret=0
          ;;
        (rename)
          _arguments \
            ':old name:__git_remotes' \
            ':new name:__git_remotes' && ret=0
          ;;
        (rm)
          _arguments \
            ': :__git_remotes' && ret=0
          ;;
        (set-head)
          # TODO: Second argument should be a branch at url for remote.
          _arguments -w -S -s \
            '(- 2)'{-d,--delete}'[delete default branch]' \
            '(- 2)'{-a,--auto}'[determine default branch automatically]' \
            ': :__git_remotes' \
            ': :__git_branch_names' && ret=0
          ;;
        (set-branches)
          # TODO: Branches should be at url.
          _arguments -w -S -s \
            '--add[add branches to those already defined]' \
            ': :__git_remotes' \
            '*: :__git_branch_names' && ret=0
          ;;
        (set-url)
          # TODO: Old URL should be one of those defined for the remote.
          _arguments -w -S -s \
            '(3)--push[manipulate push URLs instead of fetch URLs]' \
            '--add[add URL to those already defined]' \
            '(3)--delete[delete all matching URLs]' \
            ': :__git_remotes' \
            ':new url:_urls' \
            ':old url:_urls' && ret=0
          ;;
        (show)
          _arguments -w -S -s \
            '-n[do not contact the remote for a list of branches]' \
            '*: :__git_remotes' && ret=0
          ;;
        (prune)
          _arguments -w -S -s \
            '(-n --dry-run)'{-n,--dry-run}'[do not actually prune, only list what would be done]' \
            '*: :__git_remotes' && ret=0
          ;;
        (update)
          _arguments -w -S -s \
            '(-p --prune)'{-p,--prune}'[prune all updated remotes]' \
            ': :__git_remote-groups' && ret=0
          ;;
      esac
      ;;
  esac

  return ret
}

(( $+functions[_git-repack] )) ||
_git-repack () {
  # TODO: --quiet is undocumented.
  _arguments -w -S -s \
    '(-A)-a[pack all objects into a single pack]' \
    '(-a)-A[pack all objects into a single pack, but unreachable objects become loose]' \
    '-d[remove redundant packs after packing]' \
    '-l[pass --local option to git pack-objects]' \
    '-f[pass --no-reuse-delta option to git pack-objects]' \
    '-F[pass --no-reuse-object option to git pack-objects]' \
    '(-q --quiet)'{-q,--quiet}'[pass -q option to git pack-objects]' \
    '-n[do not update server information]' \
    '--window=-[number of objects to consider when doing delta compression]: :__git_guard_number "number of objects"' \
    '--depth=-[maximum delta depth]: :__git_guard_number "maximum delta depth"' \
    '--window-memory=-[scale window size dynamically to not use more than N bytes of memory]: :__git_guard_bytes' \
    '--max-pack-size=-[maximum size of each output packfile]:maximum pack size:__git_guard_bytes'
}

(( $+functions[_git-replace] )) ||
_git-replace () {
  _arguments -w -S -s \
    '(- *)-f[overwrite existing replace ref]' \
    '(- 2)-d[delete existing replace refs]' \
    '(- : *)-l[list replace refs]:pattern' \
    ': :__git_objects' \
    ':replacement:__git_objects' \
    '*: :__git_objects'
}

# Ancillary Commands (Interrogators)

(( $+functions[_git-blame] )) ||
_git-blame () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  declare -a revision_options
  __git_setup_revision_options

  # TODO: Not sure about __git_cached_files.
  _arguments -w -C -S -s \
    '-b[show blank SHA-1 for boundary commits]' \
    '--root[do not treat root commits as boundaries]' \
    '--show-stats[include additional statistics at the end of blame output]' \
    '-L[annotate only the given line range]: :->line-range' \
    '-l[show long rev]' \
    '-t[show raw timestamp]' \
    '-S[use revs from revs-file]:revs-file:_files' \
    '--reverse[walk histor forward instead of backward]' \
    '(-p --porcelain)'{-p,--porcelain}'[show results designed for machine processing]' \
    '--incremental[show results incrementally for machine processing]' \
    '--contents[annotate against the given file if no rev is specified]: :_files' \
    '(-h --help)'{-h,--help}'[show help message]' \
    '-c[use same output format as git annotate]' \
    '--score-debug[output debugging information relating to -C and -M line movement]' \
    '(-f --show-name)'{-f,--show-name}'[show the filename of the original commit]' \
    '(-n --show-number)'{-n,--show-number}'[show the line number in the original commit]' \
    '-s[suppress author name and timestamp]' \
    '-w[ignore whitespace when finding lines]' \
    $revision_options \
    ': :__git_cached_files' \
    ':: :__git_revisions' && ret=0

  case $state in
    (line-range)
      if compset -P '([[:digit:]]#|/[^/]#(\\?[^/]#)#/),'; then
        _alternative \
          'line-numbers::__git_guard_number "line number"' \
          'regexes::_guard "(/[^/]#(\\?[^/]#)#(/|)|)" regex' \
          'offsets::_guard "([+-][[:digit:]]#|)" "line offset"' && ret=0
      else
        _alternative \
          'line-numbers::__git_guard_number "line number"' \
          'regexes::_guard "(/[^/]#(\\?[^/]#)#(/|)|)" regex' && ret=0
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-cherry] )) ||
_git-cherry () {
  # TODO: --abbrev is undocumented.
  _arguments \
    '(-v --verbose)'{-v,--verbose}'[output additional information]' \
    '--abbrev=[set minimum SHA1 display-length]: :__git_guard_number length' \
    ':upstream commit:__git_commits' \
    '::head commit:__git_commits' \
    '::limit commit:__git_commits'
}

(( $+functions[_git-count-objects] )) ||
_git-count-objects () {
  _arguments \
    '(-v --verbose)'{-v,--verbose}'[also report number of in-pack objects and objects that can be removed]'
}

(( $+functions[_git-difftool] )) ||
_git-difftool () {
  # TODO: Is this fine, or do we need to modify the context or similar?
  _git-diff \
    '(-y --no-prompt --prompt)'{-y,--no-prompt}'[do not prompt before invocation of diff tool]' \
    '(-y --no-prompt)--prompt[prompt before invocation of diff tool]' \
    '(-t --tool -x --extcmd)'{-t,--tool=-}'[merge resolution program to use]: :__git_difftools' \
    '(-t --tool -x --extcmd)'{-x,--extcmd=-}'[custom diff command to use]: :_path_commands' \
    '(-g --gui)'{-g,--gui}'[use diff.guitool instead of diff.tool]'
}

(( $+functions[_git-fsck] )) ||
_git-fsck () {
  # TODO: -v is undocumented.
  _arguments -w -S -s \
    '--unreachable[show objects that are unreferenced in the object database]' \
    '--root[show root nodes]' \
    '--tags[show tags]' \
    '--cache[consider objects recorded in the index as head nodes for reachability traces]' \
    '--no-reflogs[do not consider commits referenced only by reflog entries to be reachable]' \
    '--full[check all object directories]' \
    '--strict[do strict checking]' \
    '(-v --verbose)'{-v,--verbose}'[output additional information]' \
    '--lost-found[write dangling objects into .git/lost-found]' \
    '*: :__git_objects'
}

(( $+functions[_git-get-tar-commit-id] )) ||
_git-get-tar-commit-id () {
  _message 'no arguments allowed; accepts tar-file on standard input'
}

(( $+functions[_git-help] )) ||
_git-help () {
  _arguments -w -S -s \
    '(         -i --info -m --man -w --web)'{-a,--all}'[show all available commands]' \
    '(-a --all           -m --man -w --web)'{-i,--info}'[show all available commands]' \
    '(-a --all -i --info          -w --web)'{-m,--man}'[show all available commands]' \
    '(-a --all -i --info -m --man         )'{-w,--web}'[show all available commands]' \
    ': :_git_commands'
}

(( $+functions[_git-instaweb] )) ||
_git-instaweb () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -w -C -S -s \
    '(-l --local)'{-l,--local}'[bind the web server to 127.0.0.1]' \
    '(-d --httpd)'{-d,--httpd=}'[HTTP-daemon command-line that will be executed]:command line' \
    '(-m --module-path)'{-m,--module-path=}'[module path for the Apache HTTP-daemon]:module path:_directories' \
    '(-p --port)'{-p,--port=}'[port to bind web server to]: :__git_guard_number port' \
    '(-b --browser)'{-b,--browser=}'[web-browser command-line that will be executed]:command line' \
    '(:)--start[start the HTTP-daemon and exit]' \
    '(:)--stop[stop the HTTP-daemon and exit]' \
    '(:)--restart[restart the HTTP-daemon and exit]' \
    ': :->command' && ret=0

  case $state in
    (command)
      declare -a commands

      commands=(
        start:'start the HTTP-daemon and exit'
        stop:'stop the HTTP-daemon and exit'
        restart:'restart the HTTP-daemon and exit')

      _describe -t commands command commands && ret=0
      ;;
  esac

  return ret
}

(( $+functions[_git-merge-tree] )) ||
_git-merge-tree () {
  _arguments \
    ':base-tree:__git_tree_ishs' \
    ':branch 1:__git_tree_ishs' \
    ':branch 2:__git_tree_ishs'
}

(( $+functions[_git-rerere] )) ||
_git-rerere () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  # TODO: --rerere-autoupdate is undocumented.
  _arguments -w -C -S -s \
    '--rerere-autoupdate[register clean resolutions in index]' \
    ': :->command' && ret=0

  case $state in
    (command)
      # TODO: This isn’t optimal, as forget get confused.
      _values command \
        'clear[reset metadata used by rerere]' \
        'forget[resets metadata used by rerere for specific conflict]: :__git_cached_files' \
        'diff[output diffs for the current state of the resolution]' \
        'status[like diff, but only output filesames]' \
        'gc[prune old records of conflicted merges]' && ret=0
      ;;
  esac

  return ret
}

(( $+functions[_git-rev-parse] )) ||
_git-rev-parse () {
  local parseopt_opt= sq_quote_opt= local_env_vars_opt= h_opt=
  declare -a quiet_opts
  if (( CURRENT == 2 )); then
    parseopt_opt='--parseopt[use git rev-parse in option parsing mode]'
    sq_quote_opt='--sq-quote[use git rev-parse in shell quoting mode]'
    local_env_vars_opt='--local-env-vars[list git environment variables local to repository]'
    h_opt='-h[display usage]'
  fi

  if (( words[(I)--verify] )); then
    quiet_opts=({-q,--quiet}'[do not output error messages]')
  fi

  local ret=0

  if (( words[(I)--parseopt] )); then
    if (( words[(I)--] )); then
      _message 'argument'
    else
      # TODO: Parse option specification?
      _arguments -w -S -s \
        '(- *)'{-h,--help}'[display usage]' \
        '--keep-dashdash[do not skip first -- option]' \
        '--stop-at-non-option[stop parsing options at first non-option argument]' \
        '*:option specification' && ret=0
    fi
  elif (( words[(I)--sq-quote] )); then
    _message 'argument'
  elif (( words[(I)--local-env-vars|-h] )); then
    _message 'no more arguments'
  else
    _arguments \
      $parseopt_opt \
      $sq_quote_opt \
      $local_env_vars_opt \
      $h_opt \
      '(            --no-revs --verify --short)--revs-only[do not output flags and parameters not meant for git rev-list]' \
      '(--revs-only           --verify --short)--no-revs[do not output flags and parameters meant for git rev-list]' \
      '(        --no-flags --verify --short)--flags[do not output non-flag parameters]' \
      '(--flags            --verify --short)--no-flags[do not output flag parameters]' \
      '--default[use given argument if there is no parameter given]:argument' \
      '(--revs-only --no-revs --flags --no-flags --short)--verify[verify parameter to be usable]' \
      '(-q --quiet)'{-q,--quiet}'[suppress all output]' \
      '--sq[output single shell-quoted line]' \
      '--not[toggle ^ prefix of object names]' \
      '(           --symbolic-full-name)--symbolic[output in a format as true to input as possible]' \
      '(--symbolic                     )--symbolic-full-name[same as --symbolic, but omit non-ref inputs]' \
      '--abbrev-ref=-[a non-ambiguous short name of object]::mode:(strict loose)' \
      '--all[show all refs found in refs/]' \
      '--branches=-[show branch refs found in refs/heads/]::shell glob pattern' \
      '--tags=-[show tag refs found in refs/tags/]::shell glob pattern' \
      '--remotes=-[show tag refs found in refs/remotes/]::shell glob pattern' \
      '--glob=-[show all matching refs]::shell glob pattern' \
      '--show-toplevel[show absolute path of top-level directory]' \
      '--show-prefix[show path of current directory relative to top-level directory]' \
      '--show-cdup[show path of top-level directory relative to current directory]' \
      '--git-dir[show $GIT_DIR if defined else show path to .git directory]' \
      '--is-inside-git-dir[show whether or not current working directory is below repository directory]' \
      '--is-inside-work-tree[show whether or not current working directory is inside work tree]' \
      '--is-bare-repository[show whether or not repository is bare]' \
      '(--revs-only --no-revs --flags --no-flags --verify)--short=-[show only shorter unique name]:: :__git_guard_number length' \
      '(--since --after)'{--since=-,--after=-}'[show --max-age= parameter corresponding given date string]:datestring' \
      '(--until --before)'{--until=-,--before=-}'[show --min-age= parameter corresponding given date string]:datestring' \
      '*: :__git_objects' && ret=0
  fi

  return ret
}

(( $+functions[_git-show-branch] )) ||
_git-show-branch () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -w -C -S -s -A '-*' \
    '(--more        --merge-base --independent)--list[do not show any ancestry (--more=-1)]' \
    - branches \
      '(-r --remotes -a --all)'{-r,--remotes}'[show remote-tracking branches]' \
      '(-r --remotes -a --all)'{-a,--all}'[show both remote-tracking branches and local branches]' \
      '--current[include current branch to the list of revs]' \
      '(             --date-order)--topo-order[show commits in topological order]' \
      '(--topo-order             )--date-order[show commits in commit-date order]' \
      '--sparse[output merges that are reachable from multiple tips being shown]' \
      '(       --list --merge-base --independent)--more=[go given number of commit beyond common ancestor (no ancestry if negative)]:: :_guard "(-|)[[\:digit\:]]#" limit' \
      '(--more --list              --independent)--merge-base[act like git merge-base -a, but with two heads]' \
      '(--more --list --merge-base              )--independent[show only the reference that can not be reached from any of the other]' \
      '(          --sha1-name)--no-name[do not show naming strings for each commit]' \
      '(--no-name            )--sha1-name[name commits with unique prefix of object names]' \
      '--topics[show only commits that are NOT on the first branch given]' \
      '(        --no-color)--color[color status sign of commits]:: :__git_color_whens' \
      '(--color           )--no-color[do not color statis sign of commits]' \
      '*: :__git_revisions' \
    - reflogs \
      '(-g --reflog)'{-g,--reflog=}'[show reflog entries for given ref]:: :->limit-and-base' \
      ': :__git_references' && ret=0

  case $state in
    (limit-and-base)
      if compset -P '[[:digit:]]##,'; then
        _alternative \
          'counts::__git_guard_number count' \
          'dates::__git_datetimes' && ret=0
      else
        __git_guard_number limit
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-verify-tag] )) ||
_git-verify-tag () {
  # TODO: -v and --verbose are undocumented.
  _arguments -w -S -s \
    '(-v --verbose)'{-v,--verbose}'[output additional information]' \
    '*: :__git_tags'
}

(( $+functions[_git-whatchanged] )) ||
_git-whatchanged () {
  local -a revision_options
  __git_setup_revision_options

  _arguments -S \
    $revision_options \
    '1:: :__git_commits' \
    '*: :__git_cached_files'
}

# Interacting With Others

(( $+functions[_git-archimport] )) ||
_git-archimport () {
  # TODO: archive/branch can perhaps use _arch_archives.  It should also allow
  # an optional colon followed by a __git_branches.
  _arguments \
    '-h[display usage]' \
    '-v[verbose output]' \
    '-T[create tag for every commit]' \
    '-f[use fast patchset import strategy]' \
    '-o[use old-style branch names]' \
    '-D[attempt to import trees that have been merged from]: :__git_guard_number depth' \
    '-a[auto-register archives at http://mirrors.sourcecontrol.net]' \
    '-t[use given directory as temporary directory]: :_directories' \
    '*:archive/branch'
}

(( $+functions[_git-cvsexportcommit] )) ||
_git-cvsexportcommit () {
  # TODO: Could use _cvs_root from _cvs for completing argument to -d.
  _arguments \
    '-c[commit automatically if patch applied cleanly]' \
    '-p[be pedantic (paranoid) when applying patches]' \
    '-a[add authorship information]' \
    '-d[set an alternative CVSROOT to use]:cvsroot' \
    '-f[force the merge, even if files are not up to date]' \
    '-P[force the parent commit, even if it is not a direct parent]' \
    '-m[prepend the commit message with the provided prefix]:message prefix' \
    '-u[update affected files from CVS repository before attempting export]' \
    '-k[reverse CVS keyword expansion]' \
    '-w[specify location of CVS checkout to use for export]' \
    '-W[use current working directory for bot Git and CVS checkout]' \
    '-v[verbose output]' \
    '-h[display usage]' \
    ':: :__git_commits' \
    ': :__git_commits'
}

(( $+functions[_git-cvsimport] )) ||
_git-cvsimport () {
  # TODO: _cvs_root for -d would be nice
  _arguments \
    '-v[verbose output]' \
    '-d[specify the root of the CVS archive]:cvsroot' \
    '-C[specify the git repository to import into]:directory:_directories' \
    '-r[the git remote to import into]:remote' \
    '-o[specify the branch into which you wish to import]: :__git_branch_names' \
    '-i[do not perform a checkout after importing]' \
    '-k[remove keywords from source files in the CVS archive]' \
    '-u[convert underscores in tag and branch names to dots]' \
    '-s[substitute the "/" character in branch names with given substitution]:substitute' \
    '-p[specify additional options for cvsps]:cvsps-options' \
    '-z[specify timestamp fuzz factor to cvsps]:fuzz-factor' \
    '-P[read cvsps output file]:file:_files' \
    '-m[attempt to detect merges based on the commit message]' \
    '*-M[attempt to detect merges based on the commit message with custom pattern]:pattern' \
    '-S[skip paths matching given regex]:regex' \
    '-a[import all commits, including recent ones]' \
    '-L[limit the number of commits imported]:limit' \
    '-A[specify author-conversion file]:author-conversion file:_files' \
    '-R[generate cvs-revisions file mapping CVS revision numbers to commit IDs]' \
    '-h[display usage information]' \
    ':cvsmodule'
}

(( $+functions[_git-cvsserver] )) ||
_git-cvsserver () {
  _arguments -w -S -s \
    '--base-path[path to prepend to requested CVSROOT]: :_directories' \
    '--strict-paths[do not allow recursing into subdirectories]' \
    '--export-all[do not check for gitcvs.enabled]' \
    '(- * -V --version)'{-V,--version}'[display version information]' \
    '(- * -h --help)'{-h,-H,--help}'[display usage information]' \
    '::type:(pserver server)' \
    '*: :_directories'
}

(( $+functions[_git-imap-send] )) ||
_git-imap-send () {
  _message 'no arguments allowed; accepts mailbox file on standard input'
}

(( $+functions[_git-quiltimport] )) ||
_git-quiltimport () {
  _arguments -S \
    '(-n --dry-run)'{-n,--dry-run}'[check patches and warn if they cannot be imported]' \
    '--author[default author name and email address to use for patches]: :_email_addresses' \
    '--patches[set directory containing patches]:patch directory:_directories'
}

(( $+functions[_git-request-pull] )) ||
_git-request-pull () {
  _arguments -S \
    '-p[display patch text]' \
    ':start commit:__git_commits' \
    ': :_urls' \
    '::end commit:__git_commits'
}

(( $+functions[_git-send-email] )) ||
_git-send-email () {
  _arguments -S \
    '--annotate[review and edit each patch before sending it]' \
    '--bcc=[Bcc: value for each email]: :_email_addresses' \
    '--cc=[starting Cc: value for each email]: :_email_addresses' \
    '--compose[edit introductory message for patch series]' \
    '--from=[specify sender]:email address:_email_addresses' \
    '--in-reply-to=[specify contents of first In-Reply-To header]:message-id' \
    '--subject=[specify the initial subject of the email thread]:subject' \
    '--to=[specify the primary recipient of the emails]: :_email_addresses' \
    '--8bit-encoding=[encoding to use for non-ASCII messages]: :__git_encodings' \
    '--envelope-sender[specify the envelope sender used to send the emails]: :_email_addresses' \
    '--smtp-encryption=[specify encryption method to use]: :__git_sendemail_smtpencryption_values' \
    '--smtp-domain=[specify FQDN used in HELO/EHLO]: :_domains' \
    '--smtp-pass=[specify password to use for SMTP-AUTH]::password' \
    '--smtp-server=[specify SMTP server to connect to]:smtp server:_hosts' \
    '--smtp-server-port=[specify port to connect to SMTP server on]:smtp port:_ports' \
    '--smtp-user=[specify user to use for SMTP-AUTH]:smtp user:_users' \
    '--cc-cmd=[specify command to generate Cc\: header with]:Cc\: command:_path_commands' \
    '(                 --no-chain-reply-to)--chain-reply-to[send each email as a reply to previous one]' \
    '(--chain-reply-to                    )--no-chain-reply-to[send all emails after first as replies to first one]' \
    '--identity=[specify configuration identity]: :__git_sendemail_identities' \
    '(                   --no-signed-off-by-cc)--signed-off-by-cc[add emails found in Signed-off-by: lines to the Cc: list]' \
    '(--signed-off-by-cc                      )--no-signed-off-by-cc[do not add emails found in Signed-off-by: lines to the Cc: list]' \
    '--suppress-cc=[specify rules for suppressing Cc:]: :__git_sendemail_suppresscc_values' \
    '(                --no-suppress-from)--suppress-from[do not add the From: address to the Cc: list]' \
    '(--suppress-from                   )--no-suppress-from[add the From: address to the Cc: list]' \
    '(         --no-thread)--thread[set In-Reply-To: and References: headers]' \
    '(--thread            )--no-thread[do not set In-Reply-To: and References: headers]' \
    '--confirm[specify type of confirmation required before sending]: :__git_sendemail_confirm' \
    '--dry-run[do everything except actually sending the emails]' \
    '(               --no-format-patch)--format-patch[interpret ambiguous arguments as format-patch arguments]' \
    '(--format-patch                  )--no-format-patch[interpret ambiguous arguments file-name arguments]' \
    '--quiet[be less verbose]' \
    '(           --no-validate)--validate[perform sanity checks on patches]' \
    '(--validate              )--validate[do not perform sanity checks on patches]' \
    '--force[send emails even if safetiy checks would prevent it]' \
    '*: :_files'
}

(( $+functions[_git-svn] )) ||
_git-svn () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -C \
    '(- :)'{-V,--version}'[display version information]' \
    '(- :)'{-h,-H,--help}'[display usage information]' \
    ': :->command' \
    '*:: :->option-or-argument' && ret=0

  case $state in
    (command)
      declare -a commands

      commands=(
        init:'initialize an empty git repository with additional svn data'
        fetch:'fetch revisions from the SVN remote'
        clone:'same as init, followed by fetch'
        rebase:'fetch revs from SVN parent of HEAD and rebase current work on it'
        dcommit:'commit diffs from given head onto SVN repository'
        branch:'create a branch in the SVN repository'
        tag:'create a tag in the SVN repository'
        log:'output SVN log-messages'
        blame:'show what revision and author last modified each line of a file'
        find-rev:'output git commit corresponding to the given SVN revision'\''s hash'
        set-tree:'commit given commit or tree to SVN repository'
        create-ignore:'recursively finds the svn:ignore property and creates .gitignore files'
        show-ignore:'output corresponding toplevel .gitignore file of svn:ignore'
        mkdirs:'recreate empty directories that Git cannot track'
        commit-diff:'commit diff of two tree-ishs'
        info:'show information about a file or directory'
        proplist:'list the SVN properties stored for a file or directory'
        propget:'get a given SVN property for a file'
        show-externals:'show the subversion externals'
        gc:'compress git-svn-related information'
        reset:'undo effect of fetch back to specific revision')

      _describe -t commands command commands && ret=0
      ;;
    (option-or-argument)
      curcontext=${curcontext%:*}-$line[1]:

      declare -a remote_opts fc_opts init_opts cmt_opts opts

      # TODO: --no-auth-cache is undocumented.
      # TODO: --config-dir is undocumented.
      remote_opts=(
          '--username=[username to use for SVN transport]: :_users'
          '--ignore-paths[regular expression of paths to not check out]:pattern'
          '--no-auth-cache[undocumented]'
          '--config-dir=[undocumented]:configuration directory:_directories')

      # TODO: --repack-flags can be improved by actually completing the legal
      # flags to git-repack.
      # TODO: --noMetadata is undocumented.
      # TODO: --useSvmProps is undocumented.
      # TODO: --useSvnsyncProps is undocumented.
      # TODO: --log-window-size is undocumented.
      # TODO: --no-checkout is undocumented.
      fc_opts=(
        '--localtime[store Git commit times in local timezone]'
        '--use-log-author[use author from the first From: or Signed-Off-By: line, when fetching into git]'
        '--add-author-from[when committing to svn, append a From: line based on the git commit'\''s author string]'
        '(                --no-follow-parent)--follow-parent[follow parent commit]'
        '(--follow-parent                   )--no-follow-parent[do not follow parent commit]'
        '(-A --authors-file)'{-A,--authors-file}'[specify author-conversion file]:author-conversion file:_files'
        '--authors-prog=[program used to generate authors]: :_path_commands'
        '(-q --quiet)'{-q,--quiet}'[make git-svn less verbose]'
        '--repack=[repack files (for given number of revisions)]:: :__git_guard_number "revision limit"'
        '(--repack-flags --repack-args --repack-opts)'{--repack-flags=,--repack-args=,--repack-opts=}'[flags to pass to git-repack]:git-repack flags'
        '--noMetadata[undocumented]'
        '--useSvmProps[undocumented]'
        '--useSvnsyncProps[undocumented]'
        '--log-window-size=[undocumented]'
        '--no-checkout[undocumented]'
        $remote_opts)

      init_opts=(
          '(-T --trunk)'{-T-,--trunk=}'[set trunk sub-directory]:trunk sub-directory:->subdirectory'
          '(-t --tags)*'{-t-,--tags=}'[add tags sub-directory]:tags sub-directory:->subdirectory'
          '(-b --branches)*'{-b-,--branches=}'[add branches sub-directory]:branches sub-directory:->subdirectory'
          '(-s --stdlayout)'{-s,--stdlayout}'[shorthand for setting trunk, tags, branches as relative paths, the SVN default]'
          '--no-metadata[set svn-remote.*.noMetadata]'
          '--use-svm-props[set svn-remote.*.useSvmProps]'
          '--use-svnsync-props[set svn-remote.*.useSvnsyncProps]'
          '--rewrite-root=[set svn-remote.*.rewriteRoot]:new root:_urls'
          '--rewrite-uuid=[set svn-remote.*.rewriteUUID]:uuid'
          '--prefix=[prefix to use for names of remotes]:path prefix:_directories -r ""'
          '(               --no-minimize-url)--minimize-url[minimize URLs]'
          '(--minimize-url                  )--no-minimize-url[do not minimize URLs]'
          '--shared=[share repository amongst several users]:: :__git_repository_permissions'
          '--template=[directory to use as a template for the object database]: :_directories'
          $remote_opts)

      # TODO: -C and --copy-similarity are undocumented.
      cmt_opts=(
        '--rmdir[remove empty directories from SVN tree after commit]'
        '(-e --edit)'{-e,--edit}'[edit commit message before committing]'
        '-l-[limit number of rename/copy targets to run]: :__git_guard_number'
        '--find-copies-harder[try harder to find copies]'
        '(-C --copy-similarity)'{-C-,--copy-similarity=}'[undocumented]: :_guard "[[\:digit:\]]#" number')

      if [[ $line[1] == (fetch|clone) ]]; then
        arguments+=(
          '(-r --revision)'{-r,--revision}'[only fetch given revision or revision range]: :__git_svn_revisions'
          ':: :__git_svn-remotes')
      fi

      if [[ $line[1] == (fetch|rebase|dcommit) ]]; then
        # TODO: --fetch-all and --all are undocumented.
        opts+=(
          '(--fetch-all --all)'{--fetch-all,--all}'[undocumented]')
      fi

      if [[ $line[1] == (rebase|dcommit) ]]; then
        opts+=(
          '(-m --merge)'{-m,--merge}'[use merging strategies, if necessary]'
          '*'{-s,--strategy=-}'[use given merge strategy]:merge strategy:__git_merge_strategies')
      fi

      if [[ $line[1] == (rebase|dcommit|branch) ]]; then
        opts+=(
          '(-n --dry-run)'{-n,--dry-run}'[only display what would be done]')
      fi

      if [[ $line[1] == (rebase|dcommit|log) ]]; then
        opts+=(
          '(-v --verbose)'{-v,--verbose}'[display extra information]')
      fi

      case $line[1] in
        (init)
          opts+=(
            $init_opts)
          ;;
        (fetch)
          opts+=(
            '--parent[fetch only from SVN parent of current HEAD]'
            $fc_opts)
          ;;
        (clone)
          opts+=(
            $init_opts
            $fc_opts
            ':url:_urls'
            '::directory:_directories')
          ;;
        (rebase)
          opts+=(
            '--local[do not fetch remotely, rebase against the last fetched commit from SVN]'
            $fc_opts)
          ;;
        (dcommit)
          arguments+=(
            '--no-rebase[do not rebase or reset after committing]'
            '--commit-url[commit to a different SVN url]:SVN URL:_url'
            $fc_opts
            $cmt_opts)
          ;;
        (branch|tag)
          # TODO: -d/--destination should complete output of
          # git config --get-all svn-remote.*.branches
          # git config --get-all svn-remote.*.tags
          # TODO: --username should probably use something from _svn.
          # TODO: --commit-url should complete output of
          # git config --get-all svn-remote.*.commiturl
          opts+=(
            '(-m --message)'{-m,--message}'[specify the commit message]:message'
            '(-d --destination)'{-d,--destination}'[location of branch or tag to create in SVN repository]: :_directories'
            '--username[specify SVN username to perform commit as]: :_users'
            '--commit-url[specify URL to connect to destination SVN repository]: :_urls')

          if [[ $line[1] != tag ]]; then
            opts+=(
              '(-t --tag)'{-t,--tag}'[create a tag]')
          fi
          ;;
        (log)
          declare -a revision_options
          __git_setup_revision_options

          # TODO: --color is undocumented.
          # TODO: --pager is undocumented.
          # TODO: --non-recursive is undocumented.
          opts+=(
            $revision_options
            '(-r --revision)'{-r-,--revision=}'[revisions to output log information for]: :__git_svn_revision_numbers'
            '--limit=[like --max-count, but not counting merged/excluded commits]: :__git_guard_number limit'
            '--incremental[give output suitable for concatenation]'
            '--show-commit[output git commit SHA-1, as well]'
            '--color[undocumented]'
            '--pager[undocumented]:pager:_path_commands'
            '--non-recursive[undocumented]')
          ;;
        (blame)
          opts+=(
            '--git-format[produce output in git-blame format, with SVN revision numbers instead of git commit hashes]')
          ;;
        (set-tree)
          opts+=(
            '--stdin[read list of commits to commit from stdin]')
          ;;
        (create-ignore|show-ignore|mkdirs|proplist|propget|show-externals)
          # TODO: -r and --revision is undocumented for show-ignore and mkdirs.
          opts+=(
            '(-r --revision)'{-r,--revision}'[specify SVN revision]: :__git_svn_revisions')
          ;;
        (commit-diff)
          # TODO: -m and --message is undocumented.
          # TODO: -F and --file is undocumented.
          # TODO: -r and --revision is undocumented.
          opts+=(
            '(-m --message)'{-m-,--message=}'[undocumented]:message'
            '(-F --file)'{-F-,--file=}'[undocumented]: :_files'
            '(-r --revision)'{-r-,--revision=}'[undocumented]: :__git_svn_revisions')
          ;;
        (info)
          opts+=(
            '--url[output only value of URL field]')
          ;;
        (reset)
          opts+=(
            '(-r --revision)'{-r,--revision}'[specify most recent SVN revision to keep]: :__git_svn_revisions'
            '(-p --parent)'{-p,--parent}'[discard specified revision as well, keeping nearest parent instead]')
          ;;
      esac

      _arguments -w -C -S -s \
        '(-h -H --help)'{-h,-H,--help}'[display usage information]' \
        '(-V --version)'{-V,--version}'[display version information]' \
        '--minimize-connections[undocumented]' \
        '(-R --svn-remote --remote)'{-R,--svn-remote,--remote}'[svn remote to use]:svn remote:__git_svn-remotes' \
        '(-i --id)'{-i,--id}'[set GIT_SVN_ID]:GIT_SVN_ID' \
        $opts && ret=0

      case $state in
        (subdirectory)
          _alternative \
            'sub-directories:sub-directory:_directories' \
            'urls: :_urls' && ret=0
          ;;
      esac
      ;;
  esac

  return ret
}

# LOW-LEVEL COMMANDS (PLUMBING)

# Manipulation commands

(( $+functions[_git-apply] )) ||
_git-apply () {
  local -a apply_options
  __git_setup_apply_options

  _arguments -w -S -s \
    $apply_options \
    '--stat[output diffstat for input (turns off "apply")]' \
    '--numstat[same as --stat but in decimal notation and complete pathnames (turns off "apply")]' \
    '--summary[output summary of git-diff extended headers (turns off "apply")]' \
    '--check[check if patches are applicable (turns off "apply")]' \
    '(        --cached)--index[make sure that patch is applicable to index]' \
    '(--index         )--cached[apply patches without touching working tree]' \
    '--build-face-ancestor[build temporary index for blobs with ambiguous origin]:index:_files' \
    '(-R --reverse)'{-R,--reverse}'[apply patches in reverse]' \
    '-z[use NUL termination on output]' \
    '--unidiff-zero[disable unified-diff-context check]' \
    '--apply[apply patches that would otherwise not be applied]' \
    '--no-add[ignore additions made by the patch]' \
    '*--exclude=[skip files matching specified pattern]:pattern' \
    '*--include=[include files matching specified pattern]:pattern' \
    '--inaccurate-eof[work around missing-new-line-at-EOF bugs]' \
    '(-v --verbose)'{-v,--verbose}'[display progress on stderr]' \
    '--recount[do not trust line counts in hunk headers]' \
    '*:patch:_files'
}

(( $+functions[_git-checkout-index] )) ||
_git-checkout-index () {
  local z_opt=

  if (( words[(I)--stdin] )); then
    z_opt='-z[paths are separated with NUL character when reading from standard input]'
  fi

  _arguments -w -S -s \
    '(-u --index)'{-u,--index}'[update stat information in index]' \
    '(-q --quiet)'{-q,--quiet}'[do not complain about existing files or missing files]' \
    '(-f --force)'{-f,--force}'[force overwrite of existing files]' \
    '(-a --all --stdin *)'{-a,--all}'[check out all files in index]' \
    '(-n --no-create)'{-n,--no-create}'[do not checkout new files]' \
    '--prefix=-[prefix to use when creating files]:directory:_directories' \
    '--stage=-[check out files from named stage]:stage:(1 2 3 all)' \
    '--temp[write content to temporary files]' \
    '(-a --all *)--stdin[read list of paths from the standard input]' \
    $z_opt \
    '*: :__git_cached_files'
}

(( $+functions[_git-commit-tree] )) ||
_git-commit-tree () {
  if (( CURRENT == 2 )); then
    _arguments \
      '-h[display usage]' \
      ': :__git_trees'
  elif [[ $words[CURRENT-1] == -p ]]; then
    local expl
    _description commits expl 'parent commit'
    __git_objects $expl
  else
    compadd - '-p'
  fi
}

(( $+functions[_git-hash-object] )) ||
_git-hash-object () {
  _arguments -S \
    '-t[type of object to create]:object type:((blob\:"a blob of data"
                                                commit\:"a tree with parent commits"
                                                tag\:"a symbolic name for another object"
                                                tree\:"a recursive tree of blobs"))' \
    '-w[write object to object database]' \
    '(: --stdin-paths)--stdin[read object from standard input]' \
    '(: --stdin --path)--stdin-paths[read file names from standard input instead of from command line]' \
    '(       --no-filters)--path=[hash object as if it were located at given path]: :_files' \
    '(--path             )--no-filters[hash contents as is, ignoring any input filters]' \
    '(--stdin --stdin-paths):file:_files'
}

(( $+functions[_git-index-pack] )) ||
_git-index-pack () {
  local -a stdin_opts

  if (( words[(I)--stdin] )); then
    stdin_opts=(
      '--fix-thin[record deltified objects, based on objects not included]'
      '--keep=-[create .keep file]::reason')
  fi

  # NOTE: --index-version is only used by the Git test suite.
  # TODO: --pack_header is undocumented.
  _arguments \
    '-v[display progress on stderr]' \
    '-o[write generated pack index into specified file]: :_files' \
    '--stdin[read pack from stdin and instead write to specified file]' \
    $stdin_opts \
    '--strict[die if the pack contains broken objects or links]' \
    ':pack file:_files -g "*.pack(-.)"'
}

(( $+functions[_git-merge-file] )) ||
_git-merge-file () {
  integer n_labels=${#${(M)words[1,CURRENT-1]:#-L}}
  local label_opt=

  if (( n_labels < 3 )) || [[ $words[CURRENT-1] == -L ]]; then
    local -a ordinals

    ordinals=(first second third)

    label_opt="*-L[label to use for the $ordinals[n_labels+1] file]:label"
  fi

  # TODO: --marker-size in undocumented.
  # TODO: --diff3 is undocumented.
  _arguments \
    $label_opt \
    '(-p --stdout)'{-p,--stdout}'[send merged file to standard output instead of overwriting first file]' \
    '(-q --quiet)'{-q,--quiet}'[do not warn about conflicts]' \
    '(       --theirs --union)--ours[resolve conflicts favoring our side of the lines]' \
    '(--ours          --union)--theirs[resolve conflicts favoring their side of the lines]' \
    '(--ours --theirs        )--union[resolve conflicts favoring both sides of the lines]' \
    '--marker-size[specify length of conflict markers]: :__git_guard_number "marker length"' \
    '--diff3[undocumented]' \
    ':current file:_files' \
    ':base file:_files' \
    ':other file:_files'
}

(( $+functions[_git-merge-index] )) ||
_git-merge-index () {
  if (( CURRENT > 2 )) && [[ $words[CURRENT-1] != -[oq] ]]; then
    _arguments -S \
      '(:)-a[run merge against all files in index that need merging]' \
      '*: :__git_cached_files'
  else
    declare -a arguments

    (( CURRENT == 2 )) && arguments+='-o[skip failed merges]'
    (( CURRENT == 2 || CURRENT == 3 )) && arguments+='(-o)-q[do not complain about failed merges]'
    (( 2 <= CURRENT && CURRENT <= 4 )) && arguments+='*:merge program:_files -g "*(*)"'

    _arguments -S $arguments
  fi
}

(( $+functions[_git-mktag] )) ||
_git-mktag () {
  _message 'no arguments allowed; only accepts tags on standard input'
}

(( $+functions[_git-mktree] )) ||
_git-mktree () {
  _arguments -w -S -s \
    '-z[read NUL-terminated ls-tree -z output]' \
    '--missing[allow missing objects]' \
    '--batch[allow creation of more than one tree]'
}

(( $+functions[_git-pack-objects] )) ||
_git-pack-objects () {
  local thin_opt=

  if (( words[(I)--stdout] )); then
    thin_opt='--thin[create a thin pack]'
  fi

  # NOTE: --index-version is only used by the Git test suite.
  # TODO: --reflog is undocumented.
  # TODO: --keep-unreachable is undocumented.
  # TODO: --unpack-unreachable is undocumented.
  _arguments -A '-*' \
    '(: --max-pack-size)--stdout[write pack contents to standard output]' \
    '--revs[read revision arguments from standard input]' \
    '(--revs)--unpacked[limit objects to pack to those not already packed]' \
    '(--revs)--all[include all refs as well as revisions already specified]' \
    '--include-tag[include unasked-for annotated tags if object they reference is included]' \
    '--window=-[number of objects to use per delta compression]: :__git_guard_number "window size"' \
    '--depth=-[maximum delta depth]: :__git_guard_number "maximum delta depth"' \
    '--window-memory=-[window size in memory]:window size:__git_guard_bytes' \
    '(--stdout)--max-pack-size=[maximum size of each output packfile]:maximum pack size:__git_guard_bytes' \
    '--honor-pack-keep[ignore objects in local pack with .keep file]' \
    '(              --local)--incremental[ignore objects that have already been packed]' \
    '(--incremental        )--local[similar to --incremental, but only ignore unpacked non-local objects]' \
    '--non-empty[only create a package if it contains at least one object]' \
    '(           --all-progress)--progress[display progress on standard error]' \
    '(--progress                --all-progress-implied)--all-progress[display progress output on standard error, even during write-out phase]' \
    '(--all-progress)--all-progress-implied[like --all-progress, but only if --progress was also passed]' \
    '-q[do not report progress]' \
    '--no-reuse-delta[do not reuse existing deltas, but compute them from scratch]' \
    '--no-reuse-object[do not reuse existing object data]' \
    '--compression=-[specify compression level]: :__git_compression_levels' \
    $thin_opt \
    '--delta-base-offset[use delta-base-offset packing]' \
    '--threads=-[specify number of threads for searching for best delta matches]: :__git_guard_number "number of threads"' \
    '--keep-true-parents[pack parents hidden by grafts]' \
    '(                   --unpack-unreachable)--keep-unreachable[undocumented]' \
    '(--keep-unreachable                     )--unpack-unreachable[undocumented]' \
    ':base-name:_files'
}

(( $+functions[_git-prune-packed] )) ||
_git-prune-packed () {
  _arguments -w -S -s \
    '(-n --dry-run)'{-n,--dry-run}'[only list objects that would be removed]' \
    '(-q --quiet)'{-q,--quiet}'[do not display progress on standard error]'
}

(( $+functions[_git-read-tree] )) ||
_git-read-tree () {
  local trivial_opt= aggressive_opt=

  if (( words[(I)-m] )); then
    trivial_opt='--trivial[restrict three-way merge to only happen if no file-level merging is required]'
    aggressive_opt='--aggressive[try harder to resolve merge conflicts]'
  fi

  local -a ui_opts

  if (( words[(I)(-m|--reset|--prefix)] )); then
    ui_opts=(
      '(   -i)-u[update the work tree after successful merge]'
      '(-u   )-i[update only the index; ignore changes in work tree]')
  fi

  local exclude_per_directory_opt

  if (( words[(I)-u] )); then
    exclude_per_directory_opt='--exclude-per-directory=-[specify .gitignore file]:.gitignore file:_files'
  fi

  _arguments -w -S -s \
    '(   --reset --prefix)-m[perform a merge, not just a read]' \
    '(-m         --prefix)--reset[perform a merge, not just a read, ignoring unmerged entries]' \
    '(-m --reset          2 3)--prefix=-[read the contents of specified tree-ish under specified directory]:prefix:_directories -r ""' \
    $ui_opts \
    '-v[display progress on standard error]' \
    $trivial_opt \
    $aggressive_opt \
    $exclude_per_directory_opt \
    '--index-output=[write index in the named file instead of $GIT_INDEX_FILE]: :_files' \
    '--no-sparse-checkout[display sparse checkout support]' \
    '1:first tree-ish to be read/merged:__git_tree_ishs' \
    '2::second tree-ish to be read/merged:__git_tree_ishs' \
    '3::third tree-ish to be read/merged:__git_tree_ishs'
}

(( $+functions[_git-symbolic-ref] )) ||
_git-symbolic-ref () {
  _arguments -w -S -s \
    '(-q --quiet)'{-q,--quiet}'[do not issue error if specified name is not a symbolic ref]' \
    '-m[update reflog for specified name with specied reason]:reason for update' \
    ':symbolic reference:__git_heads' \
    ':: :__git_references'
}

(( $+functions[_git-unpack-objects] )) ||
_git-unpack-objects () {
  _arguments \
    '-n[only list the objects that would be unpacked]' \
    '-q[run quietly]' \
    '-r[try recovering objects from corrupt packs]' \
    '--strict[do not write objects with broken content or links]'
}

(( $+functions[_git-update-index] )) ||
_git-update-index () {
  local z_opt

  if (( words[(I)--stdin|--index-info] )); then
    z_opt='-z[paths are separated with NUL character when reading from stdin]'
  fi

  _arguments -S \
    $refreshables \
    '(-)'{-h,--help}'[display usage information]' \
    '--add[add files not already in index]' \
    '(         --force-remove)--remove[remove files that are in the index but are missing from the work tree]' \
    '(--remove               )--force-remove[remove files from both work tree and index]' \
    '(-q --unmerged --ignore-missing --really-refresh)--refresh[refresh index]' \
    '-q[run quietly]' \
    '--ignore-submodules[do not try to update submodules]' \
    '--unmerged[if unmerged changes exists, ignore them instead of exiting]' \
    '--ignore-missing[ignore missing files when refreshing the index]' \
    '*--cacheinfo[insert information directly into the cache]: :_guard "[0-7]#" "octal file mode": :_guard "[[\:xdigit\:]]#" "object id": :_files' \
    '(: -)--index-info[read index information from stdin]' \
    '--chmod=-[set execute permissions on updated files]:permission:((-x\:executable +x\:"not executable"))' \
    '(                   --no-assume-unchanged)--assume-unchanged[set "assume unchanged" bit for given paths]' \
    '(--assume-unchanged                      )--no-assume-unchanged[unset "assume unchanged" bit for given paths]' \
    '(-q --unmerged --ignore-missing --refresh)--really-refresh[refresh index, unconditionally checking stat information]' \
    '(                --no-skip-worktree)--skip-worktree[set "skip-worktree" bit for given paths]' \
    '(--skip-worktree                   )--no-skip-worktree[unset "skip-worktree" bit for given paths]' \
    '(-)'{-g,--again}'[run git-update-index on differing index entries]' \
    '(-)--unresolve[restore "unmerged" or "needs updating" state of files]' \
    '--info-only[only insert files object-IDs into index]' \
    '(--remove)--force-remove[remove file from index even when working directory has no such file]' \
    '--replace[replace files already in index, if necessary]' \
    '(: -)--stdin[read list of paths from standard input]' \
    '--verbose[report what is being added and removed from the index]' \
    $z_opt \
    '*:: :_files'
}

(( $+functions[_git-update-ref] )) ||
_git-update-ref () {
  _arguments -w -S -s \
    '-m[update reflog for specified name with specied reason]:reason for update' \
    '(:)-d[delete given reference after verifying its value]:symbolic reference:__git_revisions:old reference:__git_revisions' \
    '--no-deref[overwrite ref itself, not what it points to]' \
    ':symbolic reference:__git_revisions' \
    ':new reference:__git_revisions' \
    '::old reference:__git_revisions'
}

(( $+functions[_git-write-tree] )) ||
_git-write-tree () {
  # NOTE: --ignore-cache-tree is only used for debugging.
  _arguments -w -S -s \
    '--missing-ok[ignore objects in index that are missing in object database]' \
    '--prefix=[write tree representing given sub-directory]:sub-directory:_directories -r ""'
}

# Interrogation commands

(( $+functions[_git-cat-file] )) ||
_git-cat-file () {
  _arguments -w -S -s \
    '(- 1)-t[show type of given object]' \
    '(- 1)-s[show size of given object]' \
    '(- 1)-e[exit with zero status if object exists]' \
    '(- 1)-p[pretty-print given object]' \
    '(- 1)--textconv[show content as transformed by a textconv filter]' \
    '(- :)--batch[print SHA1, type, size, and contents of each object provided on stdin]' \
    '(- :)--batch-check[print SHA1, type, and size of each object provided on stdin]' \
    '(-):object type:(blob commit tag tree)' \
    ': :__git_objects'
}

(( $+functions[_git-diff-files] )) ||
_git-diff-files () {
  declare -a revision_options
  __git_setup_revision_options

  _arguments -w -S -s \
    $revision_options \
    ': :__git_changed-in-working-tree_files' \
    ': :__git_changed-in-working-tree_files' \
    '*: :__git_changed-in-working-tree_files'
}

(( $+functions[_git-diff-index] )) ||
_git-diff-index () {
  local -a revision_options
  __git_setup_revision_options

  # TODO: Description of -m doesn’t match that for git-rev-list.  What’s going
  # on here?
  # TODO: With --cached, shouldn’t we only list files changed in index compared
  # to given tree-ish?  This should be done for git-diff as well, in that case.
  _arguments -S \
    $revision_options \
    '--cached[do not consider the work tree at all]' \
    '-m[flag non-checked-out files as up-to-date]' \
    ': :__git_tree_ishs' \
    '*: :__git_cached_files'
}

(( $+functions[_git-diff-tree] )) ||
_git-diff-tree () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  declare -a revision_options
  __git_setup_revision_options

  # NOTE: -r, -t, --root are actually parsed for all
  # __git_setup_revision_options, but only used by this command, so only have
  # them here.
  _arguments -w -C -S -s \
    $revision_options \
    '-r[recurse into subdirectories]' \
    '(-r   )-t[disply tree objects in diff output]' \
    '--root[display root diff]' \
    '-m[do not ignore merges]' \
    '-s[do not show differences]' \
    '(--pretty --header)-v[display commit message before differences]' \
    '--no-commit-id[do not display commit IDs]' \
    '(-c --cc)-c[show differences from each of parents to merge result]' \
    '(-c --cc)--cc[how differences from each of parents and omit differences from only one parent]' \
    '--always[always show commit itself and commit log message]' \
    ': :__git_tree_ishs' \
    '*:: :->files' && ret=0

  case $state in
    (files)
      if (( $#line > 2 )); then
        # TODO: It would be better to output something like
        #
        # common files:
        #   ...
        # original tree:
        #   ...
        # new tree:
        #   ...
        _alternative \
          "original-tree-files:original tree:__git_tree_files ${PREFIX:-.} $line[1]" \
          "new-tree-files:new tree:__git_tree_files ${PREFIX:-.} $line[2]" && ret=0
      else
        _alternative \
          'tree-ishs::__git_tree_ishs' \
          "tree-files::__git_tree_files ${PREFIX:-.} $line[1]" && ret=0
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-for-each-ref] )) ||
_git-for-each-ref () {
  # TODO: Better completion for --format: should complete %(field) stuff, that
  # is, %(refname), %(objecttype), %(objectsize), %(objectname) with optional ‘*’
  # in front.
  _arguments -w -S -s \
    '--count=[maximum number of refs to iterate over]: :__git_guard_number "maximum number of refs"' \
    '--sort=[key to sort refs by]: :__git_ref_sort_keys' \
    '--format=-[output format of ref information]:format' \
    '(-s --shell -p --perl --python --tcl)'{-s,--shell}'[use string literals suitable for sh]' \
    '(-s --shell -p --perl --python --tcl)'{-p,--perl}'[use string literals suitable for Perl]' \
    '(-s --shell -p --perl          --tcl)'--python'[use string literals suitable for Python]' \
    '(-s --shell -p --perl --python      )'--tcl'[use string literals suitable for Tcl]' \
    ':: :_guard "([^-]?#|)" pattern'
}

(( $+functions[_git-ls-files] )) ||
_git-ls-files () {
  local no_empty_directory_opt=

  if (( words[(I)--directory] )); then
    no_empty_directory_opt='--no-empty-directory[do not list empty directories]'
  fi

  # TODO: --resolve-undo is undocumented.
  # TODO: Replace _files with something more intelligent based on seen options.
  # TODO: Apply excludes like we do for git-clean.
  _arguments -w -S -s \
    '(-c --cached)'{-c,--cached}'[show cached files in output]' \
    '(-d --deleted)'{-d,--deleted}'[show deleted files in output]' \
    '(-m --modified)'{-m,--modified}'[show modified files in output]' \
    '(-o --others)'{-o,--others}'[show other files in output]' \
    '(-i --ignored)'{-i,--ignored}'[show ignored files in output]' \
    '(-s --stage --with-tree)'{-s,--stage}'[show stage files in output]' \
    '--directory[if a whole directory is classified as "other", show just its name]' \
    $no_empty_directory_opt \
    '(-s --stage -u --unmerged --with-tree)'{-u,--unmerged}'[show unmerged files in output]' \
    '(-k --killed)'{-k,--killed}'[show killed files in output]' \
    '-z[use NUL termination on output]' \
    '*'{-x,--exclude=-}'[skip files matching given pattern]:file pattern' \
    '*'{-X,--exclude-from=-}'[skip files matching patterns in given file]: :_files' \
    '*--exclude-per-directory=-[skip directories matching patterns in given file]: :_files' \
    '--exclude-standard[skip files in standard Git exclusion lists]' \
    '--error-unmatch[if any file does not appear in index, treat this as an error]' \
    '(-s --stage -u --unmerged)--with-tree=[treat paths removed since given tree-ish as still present]: :__git_tree_ishs' \
    '-v[identify each files status (hmrck?)]' \
    '--full-name[force paths to be output relative to the project top directory]' \
    '--abbrev=[set minimum SHA1 display-length]: :__git_guard_number length' \
    '*:: :_files'
}

(( $+functions[_git-ls-remote] )) ||
_git-ls-remote () {
  # TODO: repository needs fixing
  _arguments -A '-*' \
    '(-h --heads)'{-h,--heads}'[show only refs under refs/heads]' \
    '(-t --tags)'{-t,--tags}'[show only refs under refs/tags]' \
    '(-u --upload-pack)'{-u,--upload-pack=-}'[specify path to git-upload-pack on remote side]:remote path' \
    ': :__git_any_repositories' \
    '*: :__git_references'
}

(( $+functions[_git-ls-tree] )) ||
_git-ls-tree () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -w -C -S -s \
    '(-t)-d[do not show children of given tree (implies -t)]' \
    '-r[recurse into subdirectories]' \
    '-t[show tree entries even when going to recurse them]' \
    '(-l --long)'{-l,--long}'[show object size of blob entries]' \
    '-z[use NUL termination on output]' \
    '(--name-only --name-status)'{--name-only,--name-status}'[list only filenames, one per line]' \
    '--abbrev=[set minimum SHA1 display-length]: :__git_guard_number length' \
    '--full-name[output full path-names]' \
    '(--full-name)--full-tree[do not limit listing to current working-directory]' \
    ': :__git_tree_ishs' \
    '*:: :->file' && ret=0

  case $state in
    (file)
      __git_ignore_line __git_tree_files ${PREFIX:-.} $line[1] && ret=0
      ;;
  esac

  return ret
}

(( $+functions[_git-merge-base] )) ||
_git-merge-base () {
  _arguments -w -S -s \
    '(-a --all)'{-a,--all}'[display all common ancestors]' \
    '--octopus[compute best common ancestors of all supplied commits]' \
    '(-)--independent[display minimal subset of supplied commits with same ancestors]' \
    ': :__git_commits' \
    '*: :__git_commits'
}

(( $+functions[_git-name-rev] )) ||
_git-name-rev () {
  _arguments -S \
    '--tags[only use tags to name commits]' \
    '--refs=[only use refs matching given pattern]: :_guard "?#" "shell pattern"' \
    '(--stdin :)--all[list all commits reachable from all refs]' \
    '(--all :)--stdin[read from stdin and append revision-name]' \
    '--name-only[display only name of commits]' \
    '--no-undefined[die with non-zero return when a reference is undefined]' \
    '--always[show uniquely abbreviated commit object as fallback]' \
    '(--stdin --all)*: :__git_commits'
}

(( $+functions[_git-pack-redundant] )) ||
_git-pack-redundant () {
  _arguments -S -A '-*' \
    '(:)--all[process all packs]' \
    '--alt-odb[do not require objects to be present in local packs]' \
    '--verbose[output some statistics to standard error]' \
    '(--all)*::packs:_files -g "*.pack(-.)"'
}

(( $+functions[_git-rev-list] )) ||
_git-rev-list () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  declare -a revision_options
  __git_setup_revision_options

  _arguments -C -S \
    $revision_options \
    '(--pretty)--header[display contents of commit in raw-format]' \
    '--timestamp[print raw commit timestamp]' \
    '(         --bisect-vars --bisect-all)--bisect[show only middlemost commit object]' \
    '(--bisect)--bisect-vars[same as --bisect, displaying shell-evalable code]' \
    '(--bisect)--bisect-all[display all commit objects beteen included and excluded commits]' \
    '*:: :->commit-or-path' && ret=0

  case $state in
    (commit-or-path)
      # TODO: What paths should we be completing here?
      if [[ -n ${opt_args[(I)--]} ]]; then
        __git_cached_files && ret=0
      else
        _alternative \
          'commit-ranges::__git_commit_ranges' \
          'cached-files::__git_cached_files' && ret=0
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-show-index] )) ||
_git-show-index () {
  _message 'no arguments allowed; accepts index file on standard input'
}

(( $+functions[_git-show-ref] )) ||
_git-show-ref () {
  _arguments -S \
    - list \
      '(-h --head)'{-h,--head}'[show HEAD reference]' \
      '--tags[show only refs/tags]' \
      '--heads[show only refs/heads]' \
      '(-d --dereference)'{-d,--dereference}'[dereference tags into object IDs as well]' \
      '(-s --hash)'{-s+,--hash=-}'[only show the SHA-1 hash, not the reference name]:: :__git_guard_number length' \
      '--verify[enable stricter reference checking]' \
      '--abbrev=[set minimum SHA1 display-length]: :__git_guard_number length' \
      '(-q --quiet)'{-q,--quiet}'[do not print any results]' \
      '*: :_guard "([^-]?#|)" pattern' \
    - exclude \
      '--exclude-existing=-[filter out existing refs from stdin]:: :_guard "([^-]?#|)" pattern'
}

(( $+functions[_git-unpack-file] )) ||
_git-unpack-file () {
  _arguments -A '-*' \
    '(:)-h[display usage information]' \
    '(-): :__git_blobs'
}

(( $+functions[_git-var] )) ||
_git-var () {
  _arguments \
    '(:)-l[show logical variables]' \
    '(-):variable:((GIT_AUTHOR_IDENT\:"name and email of author" \
                    GIT_COMMITTER_IDENT\:"name and email of committer" \
                    GIT_EDITOR\:"text editor used by git commands" \
                    GIT_PAGER\:"text viewer used by git commands"))'
}

(( $+functions[_git-verify-pack] )) ||
_git-verify-pack () {
  _arguments -w -S -s \
    '(-v --verbose)'{-v,--verbose}'[show objects contained in pack]' \
    '(-s --stat-only)'{-s,--stat-only}'[do not verify pack contents; only display histogram of delta chain length]' \
    '*:index file:_files -g "*.idx"'
}

# Synching Repositories

(( $+functions[_git-daemon] )) ||
_git-daemon () {
  # TODO: do better than _directories?  The directory needs to be a git-repository,
  # so one could check for a required file in the given directory.
  # TODO: --interpolated-path should complete %H, %CH, %IP, %P, and %D.
  _arguments -S \
    '--strict-paths[match paths exactly]' \
    '--base-path=-[remap all the path requests as relative to the given path]:path:_directories' \
    '--base-path-relaxed[allow lookup of base path witout prefix]' \
    '--interpolated-path=-[dynamically construct alternate paths]:path:_directories' \
    '--export-all[allow pulling from all repositories without verification]' \
    '(--port --listen --user --group)--inetd[run server as an inetd service]' \
    '(--inetd)--listen=-[listen on a specific IP address or hostname]: :_hosts' \
    '(--inetd)--port=-[specify port to listen to]: :_ports' \
    '--init-timeout=-[specify timeout between connection and request]: :__git_guard_number timeout' \
    '--timeout=-[specify timeout for sub-requests]: :__git_guard_number timeout' \
    '--max-connections=-[specify maximum number of concurrent clients]: :__git_guard_number "connection limit"' \
    '--syslog[log to syslog instead of standard error]' \
    '--user-path=-[allow ~user notation to be used in requests]::path:_directories' \
    '--verbose[log details about incoming connections and requested files]' \
    '--reuseaddr[reuse addresses when already bound]' \
    '(--syslog)--detach[detach from the shell]' \
    '--pid-file=-[save the process id in given file]:pid file:_files' \
    '--user=-[set uid of daemon]: :_users' \
    '--group=-[set gid of daemon]: :_groups' \
    '--enable=-[enable site-wide service]: :__git_daemon_service' \
    '--disable=-[disable site-wide service]: :__git_daemon_service' \
    '--allow-override[allow overriding site-wide service]: :__git_daemon_service' \
    '--forbid-override[forbid overriding site-wide service]: :__git_daemon_service' \
    '*:repository:_directories'
}

(( $+functions[_git-fetch-pack] )) ||
_git-fetch-pack () {
  # TODO: Limit * to __git_head_references?
  _arguments -A '-*' \
    '--all[fetch all remote refs]' \
    '(-q --quiet)'{-q,--quiet}'[make output less verbose]' \
    '(-k --keep)'{-k,--keep}'[do not invoke git-unpack-objects on received data]' \
    '--thin[fetch a thin pack]' \
    '--include-tag[download referenced annotated tags]' \
    '(--upload-pack --exec)'{--upload-pack=-,--exec=-}'[specify path to git-upload-pack on remote side]:remote path' \
    '--depth=-[limit fetching to ancestor-chains not longer than given number]: :__git_guard_number "maximum ancestor-chain length"' \
    '--no-progress[do not display progress]' \
    '-v[produce verbose output]' \
    ': :__git_any_repositories' \
    '*: :__git_references'
}

(( $+functions[_git-http-backend] )) ||
_git-http-backend () {
  _nothing
}

(( $+functions[_git-send-pack] )) ||
_git-send-pack () {
  # TODO: --mirror is undocumented.
  # TODO: --stateless-rpc is undocumented.
  # TODO: --helper-status is undocumented.
  _arguments -A '-*' \
    '(--receive-pack --exec)'{--receive-pack=-,--exec=-}'[specify path to git-receive-pack on remote side]:remote path' \
    '--all[update all refs that exist locally]' \
    '--dry-run[do everything except actually sending the updates]' \
    '--force[update remote orphaned refs]' \
    '-v[produce verbose output]' \
    '--thin[send a thin pack]' \
    '--mirror[undocumented]' \
    '--stateless-rpc[undocumented]' \
    '--helper-status[undocumented]' \
    ': :__git_any_repositories' \
    '*: :__git_remote_references'
}

(( $+functions[_git-update-server-info] )) ||
_git-update-server-info () {
  _arguments -w -S -s \
    '(-f --force)'{-f,--force}'[update the info files from scratch]'
}

(( $+functions[_git-http-fetch] )) ||
_git-http-fetch () {
  _arguments \
    '-c[fetch commit objects]' \
    '-t[fetch trees associated with commit objects]' \
    '-a[fetch all objects]' \
    '-v[report what is downloaded]' \
    '-w[write commit-id into the filename under "$GIT_DIR/refs/<filename>"]:filename' \
    '--recover[recover from a failed fetch]' \
    '(1)--stdin[read commit ids and refs from standard input]' \
    ': :__git_commits' \
    ': :_urls'
}

(( $+functions[_git-http-push] )) ||
_git-http-push () {
  _arguments \
    '--all[verify that all objects in local ref history exist remotely]' \
    '--force[allow refs that are not ancestors to be updated]' \
    '--dry-run[do everything except actually sending the updates]' \
    '--verbose[report the list of objects being walked locally and sent to remote]' \
    '(   -D)-d[remove refs from remote repository]' \
    '(-d   )-D[forcefully remove refs from remote repository]' \
    ': :_urls' \
    '*: :__git_remote_references'
}

# NOTE: git-parse-remote isn’t a user command.

(( $+functions[_git-receive-pack] )) ||
_git-receive-pack () {
  # TODO: --advertise-refs is undocumented.
  # TODO: --stateless-rpc is undocumented.
  _arguments -A '-*' \
    '--advertise-refs[undocumented]' \
    '--stateless-rpc[undocumented]' \
    ':directory to sync into:_directories'
}

(( $+functions[_git-shell] )) ||
_git-shell () {
  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  _arguments -C \
    '-c[command to execute]: :->command' \
    ': :->argument' && ret=0

  case $state in
    (command)
      declare -a commands

      commands=(
        git-receive-pack
        git-upload-pack
        git-upload-archive
        cvs)

      _describe -t commands command commands && ret=0
      ;;
    (argument)
      case $line[1] in
        (git-receive-pack)
          local expl

          _description directories expl 'directory to sync into'
          _directories $expl && ret=0
          ;;
        (git-upload-pack|git-upload-archive)
          local expl

          _description directories expl 'directory to sync from'
          _directories $expl && ret=0
          ;;
        (cvs)
          compadd - server && ret=0
      esac
      ;;
  esac

  return ret
}


(( $+functions[_git-upload-archive] )) ||
_git-upload-archive () {
  _arguments \
    ':directory to get tar archive from:_directories'
}

(( $+functions[_git-upload-pack] )) ||
_git-upload-pack () {
  # TODO: --advertise-refs is undocumented.
  # TODO: --stateless-rpc is undocumented.
  _arguments -S -A '-*' \
    '--strict[do not try <directory>/.git/ if <directory> is not a git directory' \
    '--timeout=-[interrupt transfer after given number of seconds of inactivity]: :__git_guard_number "inactivity timeout"' \
    '--advertise-refs[undocumented]' \
    '--stateless-rpc[undocumented]' \
    ': :_directories'
}

# Internal Helper Commands

(( $+functions[_git-check-attr] )) ||
_git-check-attr () {
  local z_opt=

  local curcontext=$curcontext state line ret=1
  declare -A opt_args

  if (( words[(I)--stdin] )); then
    z_opt='-z[paths are separated with NUL character when reading from stdin]'
  fi

  _arguments -C \
    '--stdin[read file names from stdin instead of from command line]' \
    $z_opt \
    '(-)--[interpret preceding arguments as attributes and following arguments as path names]' \
    '*:: :->attribute-or-file' && ret=0

  case $state in
    (attribute-or-file)
      local -a attributes

      attributes=(crlf ident filter diff merge)

      local only_attributes=1
      for (( i = 2; i < $#words; i++ )); do
        if (( attributes[(I)$words[i]] == 0 )); then
          only_attributes=0
          break
        fi
      done

      if (( !only_attributes )) || [[ -n ${opt_args[(I)--]} ]]; then
        __git_cached_files && ret=0
      else
        _alternative \
          'attributes::__git_attributes' \
          'files::__git_cached_files' && ret=0
      fi
      ;;
  esac

  return ret
}

(( $+functions[_git-check-ref-format] )) ||
_git-check-ref-format () {
  _arguments \
    '-h[display usage information]' \
    '--print[display canonicalized name of hypothetical reference of given name]' \
    '--branch[expand previous branch syntax]' \
    ': :__git_references'
}

(( $+functions[_git-fmt-merge-msg] )) ||
_git-fmt-merge-msg () {
  _arguments -w -S -s \
    '(      --no-log)--log[display one-line descriptions from actual commits being merged]' \
    '(--log         )--no-log[do not display one-line descriptions from actual commits being merged]' \
    '(-m --message)'{-m+,--message=}'[use given message instead of branch names for first line in log message]:message' \
    '(-F --file)'{-F,--file}'[specify list of merged objects from file]: :_files'
}

(( $+functions[_git-mailinfo] )) ||
_git-mailinfo () {
  # TODO: --no-inbody-headers is undocumented.
  _arguments -A '-*' \
    '-k[do not strip/add \[PATCH\] from first line of commit message]' \
    '(-u --encoding)-u[encode commit information in UTF-8]' \
    '(-u --encoding)--encoding=-[encode commit information in given encoding]: :__git_encodings' \
    '-n[disable all charset re-coding of metadata]' \
    '(           --no-scissors)--scissors[remove everything in body before a scissors line]' \
    '(--scissors              )--no-scissors[do not remove everything in body before a scissors line]' \
    '--no-inbody-headers[undocumented]' \
    ':message file:_files' \
    ':patch file:_files'
}

(( $+functions[_git-mailsplit] )) ||
_git-mailsplit () {
  _arguments -S -A '-*' \
    '-o-[directory in which to place individual messages]:directory:_directories' \
    '-b[if file does not begin with "From " line, assume it is a single mail message]' \
    '-d-[specify number of leading zeros]: :__git_guard_number precision' \
    '-f-[skip the first N numbers]: :__git_guard_number' \
    '--keep-cr[do not remove CR from lines ending with CR+LF]' \
    '*::mbox file:_files'
}

(( $+functions[_git-merge-one-file] )) ||
_git-merge-one-file () {
  _message 'you probably should not be issuing this command'
}

(( $+functions[_git-patch-id] )) ||
_git-patch-id () {
  _message 'no arguments allowed; accepts patch on standard input'
}

# NOTE: git-sh-setup isn’t a user command.

(( $+functions[_git-stripspace] )) ||
_git-stripspace () {
  _arguments \
    '(-s --strip-comments)'{-s,--strip-comments}'[also strip lines starting with #]'
}

# INTERNAL GIT COMPLETION FUNCTIONS

# Generic Helpers

(( $+functions[__git_command_successful] )) ||
__git_command_successful () {
  if (( ${#*:#0} > 0 )); then
    _message 'not a git repository'
    return 1
  fi
  return 0
}

(( $+functions[__git_committish_range_first] )) ||
__git_committish_range_first () {
  print -r -- ${1%..(.|)*}
}

(( $+functions[__git_committish_range_last] )) ||
__git_committish_range_last () {
  print -r -- ${1##*..(.|)}
}

(( $+functions[__git_pattern_escape] )) ||
__git_pattern_escape () {
  print -r -n ${1//(#m)[\[\]()\\*?#<>~\^]/\\$MATCH}
}

(( $+functions[__git_is_type] )) ||
__git_is_type () {
  git rev-parse -q --verify "$2^{$1}" 2>/dev/null >/dev/null
}

(( $+functions[__git_is_blob] )) ||
__git_is_blob () {
  __git_is_type blob $1
}
(( $+functions[__git_is_committish] )) ||
__git_is_committish () {
  __git_is_type commit $1
}

(( $+functions[__git_is_treeish] )) ||
__git_is_treeish () {
  __git_is_type tree $1
}

(( $+functions[__git_is_committish_range] )) ||
__git_is_committish_range () {
  # TODO: This isn’t quite right.  We would like to do parts=${(~s:..(.|))},
  # but that doesn’t work.  (This would allow us to make sure that parts only
  # contains two elements and then apply __git_is_committish on them.
  [[ $1 == *..(.|)* ]] &&
    __git_is_committish $(__git_committish_range_first $1) &&
    __git_is_committish $(__git_committish_range_last $1)
}

(( $+functions[__git_is_initial_commit] )) ||
__git_is_initial_commit () {
  git rev-parse -q --verify HEAD >/dev/null 2>/dev/null
  (( $? == 1 ))
}

(( $+functions[__git_is_in_middle_of_merge] )) ||
__git_is_in_middle_of_merge () {
  local gitdir

  gitdir=$(_call_program gitdir git rev-parse --git-dir 2>/dev/null)
  __git_command_successful $pipestatus || return

  [[ -f $gitdir/MERGE_HEAD ]]
}

# Completion Wrappers

(( $+functions[__git_ignore_line] )) ||
__git_ignore_line () {
  declare -a ignored
  ignored=()
  ((CURRENT > 1)) &&
    ignored+=(${line[1,CURRENT-1]//(#m)[\[\]()\\*?#<>~\^]/\\$MATCH})
  ((CURRENT < $#line)) &&
    ignored+=(${line[CURRENT+1,-1]//(#m)[\[\]()\\*?#<>~\^]/\\$MATCH})
  $* -F ignored
}

(( $+functions[__git_ignore_line_inside_arguments] )) ||
__git_ignore_line_inside_arguments () {
  declare -a compadd_opts

  zparseopts -D -E -a compadd_opts V: J: 1 2 n f X: M: P: S: r: R: q F:

  __git_ignore_line $* $compadd_opts
}

# Common Argument Types

(( $+functions[_git_commands] )) ||
_git_commands () {
  local -a main_porcelain_commands
  main_porcelain_commands=(
    add:'add file contents to index'
    am:'apply patches from a mailbox'
    archive:'create archive of files from named tree'
    bisect:'find, by binary search, change that introduced a bug'
    branch:'list, create, or delete branches'
    bundle:'move objects and refs by archive'
    checkout:'checkout branch or paths to working tree'
    cherry-pick:'apply changes introduced by some existing commits'
    citool:'graphical alternative to git commit'
    clean:'remove untracked files from working tree'
    clone:'clone repository into new directory'
    commit:'record changes to repository'
    describe:'show most recent tag that is reachable from a commit'
    diff:'show changes between commits, commit and working tree, etc.'
    fetch:'download objects and refs from another repository'
    format-patch:'prepare patches for e-mail submission'
    gc:'cleanup unnecessary files and optimize local repository'
    grep:'print lines matching a pattern'
    gui:'run portable graphical interface to git'
    init:'create empty git repository or re-initialize an existing one'
    log:'show commit logs'
    merge:'join two or more development histories together'
    mv:'move or rename file, directory, or symlink'
    notes:'add or inspect object notes'
    pull:'fetch from and merge with another repository or local branch'
    push:'update remote refs along with associated objects'
    rebase:'fasforward-port local commits to the updated upstream head'
    reset:'reset current HEAD to specified state'
    revert:'revert existing commits'
    rm:'remove files from the working tree and from the index'
    shortlog:'summarize git log output'
    show:'show various types of objects'
    stash:'stash away changes to dirty working directory'
    status:'show working-tree status'
    submodule:'initialize, update, or inspect submodules'
    tag:'create, list, delete or verify tag object signed with GPG')

  local -a ancillary_manipulator_commands
  ancillary_manipulator_commands=(
    config:'get and set repository or global options'
    fast-export:'data exporter'
    fast-import:'import information into git directly'
    filter-branch:'rewrite branchers'
    mergetool:'run merge conflict resolution tools to resolve merge conflicts'
    pack-refs:'pack heads and tags for efficient repository access'
    prune:'prune all unreachable objects from the object database'
    reflog:'manage reflog information'
    relink:'hardlink common objects in local repositories'
    remote:'manage set of tracked repositories'
    repack:'pack unpacked objects in a repository'
    replace:'create, list, delete refs to replace objects')

  local -a ancillary_interrogator_commands
  ancillary_interrogator_commands=(
    blame:'show what revision and author last modified each line of a file'
    cherry:'find commits not merged upstream'
    count-objects:'count unpacked objects and display their disk consumption'
    difftool:'show changes using common diff tools'
    fsck:'verify connectivity and validity of objects in database'
    get-tar-commit-id:'extract commit ID from an archive created using git archive'
    help:'display help information about git'
    instaweb:'instantly browse your working repository in gitweb'
    merge-tree:'show three-way merge without touching index'
    rerere:'reuse recorded resolution of conflicted merges'
    rev-parse:'pick out and massage parameters for other git commands'
    show-branch:'show branches and their commits'
    verify-tag:'check GPG signature of tags'
    whatchanged:'show commit-logs and differences they introduce')

  local -a interaction_commands
  interaction_commands=(
    archimport:'import an Arch repository into git'
    cvsexportcommit:'export a single commit to a CVS checkout'
    cvsimport:'import a CVS "repository" into a git repository'
    cvsserver:'run a CVS server emulator for git'
    imap-send:'send a collection of patches to an IMAP folder'
    quiltimport:'apply a quilt patchset'
    request-pull:'generate summary of pending changes'
    send-email:'send collection of patches as emails'
    svn:'bidirectional operation between a Subversion repository and git')

  local -a plumbing_manipulator_commands
  plumbing_manipulator_commands=(
    apply:'apply patch to files and/or to index'
    checkout-index:'copy files from index to working directory'
    commit-tree:'create new commit object'
    hash-object:'compute object ID and optionally create a blob from a file'
    index-pack:'build pack index file for an existing packed archive'
    merge-file:'run a three-way file merge'
    merge-index:'run merge for files needing merging'
    mktag:'create tag object'
    mktree:'build tree-object from git ls-tree formatted text'
    pack-objects:'create packed archive of objects'
    prune-packed:'remove extra objects that are already in pack files'
    read-tree:'read tree information into directory index'
    symbolic-ref:'read and modify symbolic references'
    unpack-objects:'unpack objects from packed archive'
    update-index:'register file contents in the working directory to the index'
    update-ref:'update object name stored in a reference safely'
    write-tree:'create tree from the current index')

  local -a plumbing_interrogator_commands
  plumbing_interrogator_commands=(
    cat-file:'provide content or type information for repository objects'
    diff-files:'compare files in working tree and index'
    diff-index:'compare content and mode of blobs between index and repository'
    diff-tree:'compare content and mode of blobs found via two tree objects'
    for-each-ref:'output information on each ref'
    ls-files:'information about files in index/working directory'
    ls-remote:'show references in a remote repository'
    ls-tree:'list contents of a tree object'
    merge-base:'find as good a common ancestor as possible for a merge'
    name-rev:'find symbolic names for given revisions'
    pack-redundant:'find redundant pack files'
    rev-list:'list commit object in reverse chronological order'
    show-index:'show packed archive index'
    show-ref:'list references in a local repository'
    unpack-file:'create temporary file with blob'\''s contents'
    var:'show git logical variable'
    verify-pack:'validate packed git archive files')

  local -a plumbing_sync_commands
  plumbing_sync_commands=(
    daemon:'run a really simple server for git repositories'
    fetch-pack:'receive missing objects from another repository'
    http-backend:'run a server side implementation of Git over HTTP'
    send-pack:'push objects over git protocol to another repository'
    update-server-info:'update auxiliary information file to help dumb servers')

  local -a plumbing_sync_helper_commands
  plumbing_sync_helper_commands=(
    http-fetch:'download from remote git repository via HTTP'
    http-push:'push objects over HTTP/DAV to another repository'
    parse-remote:'routines to help parsing remote repository access parameters'
    receive-pack:'receive what is pushed into repository'
    shell:'restricted login shell for GIT-only SSH access'
    upload-archive:'send archive back to git-archive'
    upload-pack:'send objects packed back to git fetch-pack')

  local -a plumbing_internal_helper_commands
  plumbing_internal_helper_commands=(
    check-attr:'display gitattributes information'
    check-ref-format:'ensure that a reference name is well formed'
    fmt-merge-msg:'produce merge commit message'
    mailinfo:'extract patch and authorship from a single email message'
    mailsplit:'split mbox file into a list of files'
    merge-one-file:'standard helper-program to use with git merge-index'
    patch-id:'compute unique ID for a patch'
    stripspace:'filter out empty lines')

  local -a user_commands
  zstyle -a :completion:$curcontext: user-commands user_commands

  local -a third_party_commands
  local command
  for command in $_git_third_party_commands; do
    (( $+commands[git-${command%%:*}] )) && third_party_commands+=$command
  done

  local -a aliases unique_aliases
  __git_extract_aliases
  local alias
  for alias in $aliases; do
    local name=${alias%%:*}
    (( main_porcelain_commands[(I)$name:*] ||
       user_commands[(I)$name:*] ||
       third_party_commands[(I)$name:*] ||
       ancillary_manipulator_commands[(I)$name:*] ||
       ancillary_interrogator_commands[(I)$name:*] ||
       interaction_commands[(I)$name:*] ||
       plumbing_manipulator_commands[(I)$name:*] ||
       plumbing_interrogator_commands[(I)$name:*] ||
       plumbing_sync_commands[(I)$name:*] ||
       plumbing_sync_helper_commands[(I)$name:*] ||
       plumbing_internal_helper_commands[(I)$name:*] )) || unique_aliases+=$alias
  done

  integer ret=1

  # TODO: Is this the correct way of doing it?  Should we be using _alternative
  # and separate functions for each set of commands instead?
  _describe -t aliases alias unique_aliases && ret=0
  _describe -t main-porcelain-commands 'main porcelain command' main_porcelain_commands && ret=0
  _describe -t user-commands 'user command' user_commands && ret=0
  _describe -t third-party-commands 'third-party command' third_party_commands && ret=0
  _describe -t ancillary-manipulator-commands 'ancillary manipulator command' ancillary_manipulator_commands && ret=0
  _describe -t ancillary-interrogator-commands 'ancillary interrogator command' ancillary_interrogator_commands && ret=0
  _describe -t interaction-commands 'interaction command' interaction_commands && ret=0
  _describe -t plumbing-manipulator-commands 'plumbing manipulator command' plumbing_manipulator_commands && ret=0
  _describe -t plumbing-interrogator-commands 'plumbing interrogator command' plumbing_interrogator_commands && ret=0
  _describe -t plumbing-sync-commands 'plumbing sync command' plumbing_sync_commands && ret=0
  _describe -t plumbing-sync-helper-commands 'plumbing sync helper command' plumbing_sync_helper_commands && ret=0
  _describe -t plumbing-internal-helper-commands 'plumbing internal helper command' plumbing_internal_helper_commands && ret=0

  return ret
}

(( $+functions[__git_aliases] )) ||
__git_aliases () {
  local -a aliases
  __git_extract_aliases

  _describe -t aliases alias aliases $*
}

(( $+functions[__git_extract_aliases] )) ||
__git_extract_aliases () {
  aliases=(${^${${(0)"$(_call_program aliases "git config -z --get-regexp '^alias.'")"}#alias.}/$'\n'/:alias for \'}\')
}

(( $+functions[__git_date_formats] )) ||
__git_date_formats () {
  declare -a date_formats

  date_formats=(
    relative:'show dates relative to the current time'
    local:'show timestamps in local timezone'
    iso:'show timestamps in ISO 8601 format'
    rfc:'show timestamps in RFC 2822 format'
    short:'show only date but not time'
    raw:'show date in internal raw git format (%s %z)'
    default:'show timestamp in the original timezone')

  _describe -t date-formats 'date format' date_formats $*
}

(( $+functions[__git_gpg_secret_keys] )) ||
__git_gpg_secret_keys () {
  local expl

  _wanted secret-keys expl 'secret key' compadd \
    ${${(Mo)$(_call_program secret-keys gpg --list-secret-keys 2>/dev/null):%<*>}//(<|>)/}
}

(( $+functions[__git_merge_strategies] )) ||
__git_merge_strategies () {
  local expl
  local -a merge_strategies

  merge_strategies=(${=${${(M)${(f)"$(_call_program merge-strategies "git merge -s '' 2>&1")"}:#[Aa]vailable (custom )#strategies are: *}#[Aa]vailable (custom )#strategies are: }%.})
  __git_command_successful $pipestatus || return 1

  _wanted merge-strategies expl 'merge strategy' compadd $* - $merge_strategies
}

(( $+functions[__git_encodings] )) ||
__git_encodings () {
  # TODO: Use better algorithm, as shown in iconv completer (separate it to a
  # new Type).
  local expl
  _wanted encodings expl 'encoding' compadd "$@" \
    -M 'm:{a-zA-Z}={A-Za-z} r:|-=* r:|=*' \
    ${${${(f)"$(_call_program encodings iconv --list)"}## #}%//}
}

(( $+functions[__git_apply_whitespace_strategies] )) ||
__git_apply_whitespace_strategies () {
  declare -a strategies

  strategies=(
    'nowarn:turn off the trailing-whitespace warning'
    'warn:output trailing-whitespace warning, but apply patch'
    'fix:output trailing-whitespace warning and strip trailing whitespace'
    'error:output trailing-whitespace warning and refuse to apply patch'
    'error-all:same as "error", but output warnings for all files')

  _describe -t strategies 'trailing-whitespace resolution strategy' strategies $*
}

(( $+functions[__git_remotes] )) ||
__git_remotes () {
  local remotes expl

  remotes=(${(f)"$(_call_program remotes git remote 2>/dev/null)"})

  _wanted remotes expl remote compadd $* - $remotes
}

(( $+functions[__git_ref_specs] )) ||
__git_ref_specs () {
  # TODO: This needs to deal with a lot more types of things.
  if compset -P '*:'; then
    __git_heads
  else
    compset -P '+'
    if compset -S ':*'; then
      __git_heads
    else
      _alternative \
       'commit-tags::__git_commit_tags' \
       'heads::__git_heads -qS :'
    fi
  fi
}

(( $+functions[__git_color_whens] )) ||
__git_color_whens () {
  local -a whens

  whens=(
    'always:always use colors'
    'never:never use colors'
    'auto:use colors if output is to a terminal')

  _describe -t whens when whens $*
}

(( $+functions[__git_ignore_submodules_whens] )) ||
__git_ignore_submodules_whens () {
  local -a whens

  whens=(
    none:'submodule is dirty when it contains untracked or modified files'
    untracked:'submodule is dirty when it contains untracket files'
    dirty:'ignore all changes to submodules, showing only changes to commits stored in superproject'
    all:'ignore all changes to submodules (default)')

  _describe -t whens when whens $*
}

# (Currently) Command-specific Argument Types
(( $+functions[__git_archive_formats] )) ||
__git_archive_formats () {
  local expl

  _wanted archive-formats expl 'archive format' \
    compadd $* - ${${(f)"$(_call_program archive-formats git archive --list)"}}
}

(( $+functions[__git_compression_levels] )) ||
__git_compression_levels () {
  __git_config_values -t compression-levels -l 'compression level' -- "$current" "$parts[5]" \
    '-1:default level of compression' \
    '0:do not deflate files' \
    '1:minimum compression' \
    '2:a little more compression' \
    '3:slightly more compression' \
    '4:a bit more compression' \
    '5:even more compression' \
    '6:slightly even more compression' \
    '7:getting there' \
    '8:close to maximum compression' \
    '9:maximum compression'
}

(( $+functions[__git_attributes] )) ||
__git_attributes () {
  local -a attributes

  attributes=(
    'crlf:line-ending convention'
    'ident:ident substitution'
    'filter:filters'
    'diff:textual diff'
    'merge:merging strategy')

  _describe -t attributes attribute attributes $*
}

(( $+functions[__git_daemon_service] )) ||
__git_daemon_service () {
  local -a services

  services=(
    'upload-pack:serve git fetch-pack and git ls-remote clients'
    'upload-archive:serve git archive --remote clients')

  _describe -t services service services $*
}

(( $+functions[__git_log_decorate_formats] )) ||
__git_log_decorate_formats () {
  declare -a log_decorate_formats

  log_decorate_formats=(
    short:'do not show ref name prefixes'
    full:'show ref name prefixes'
    no:'do not show ref names')

  _describe -t log-decorate-formats 'log decorate format' log_decorate_formats $*
}

(( $+functions[__git_repository_permissions] )) ||
__git_repository_permissions () {
  if [[ -prefix [0-7] ]]; then
    _message -e number 'numeric mode'
  else
    declare -a permissions

    permissions=(
      {umask,false,no,off}':use permissions reported by umask()'
      {group,true,yes,on}':files and objects are group-writable'
      {all,world,everybody}':files and objects are readable by all users and group-shareable')

    _describe -t permissions permission permissions $*
  fi
}

(( $+functions[__git_reflog_entries] )) ||
__git_reflog_entries () {
  local expl
  declare -a reflog_entries

  reflog_entries=(${${${(f)"$(_call_program reflog-entries git reflog 2>/dev/null)"}#* }%%:*})
  __git_command_successful $pipestatus || return 1

  if compset -P '*@'; then
    reflog_entries=(${${(M)reflog_entries:#$IPREFIX*}#$IPREFIX})
    _wanted reflog-entries expl 'reflog entry' compadd $* - $reflog_entries
  else
    reflog_entries=(${reflog_entries%@*})
    _wanted reflog-entries expl 'reflog entry' compadd -qS @ $* - $reflog_entries
  fi
}

(( $+functions[__git_ref_sort_keys] )) ||
__git_ref_sort_keys () {
  compset -P '-'

  local -a sort_keys

  # TODO: numparent is undocumented.
  sort_keys=(
    'refname:the name of the ref'
    'objecttype:the type of the object'
    'objectsize:the size of the object'
    'objectname:the object name (SHA-1)'
    'tree:the tree header-field'
    'parent:the parent header-field'
    'numparent:undocumented'
    'object:the object header-field'
    'type:the type header-field'
    'tag:the tag header-field'
    'author:the author header-field'
    'authorname:the name component of the author header-field'
    'authoremail:the email component of the author header-field'
    'authordate:the date component of the author header-field'
    'committername:the name component of the committer header-field'
    'committeremail:the email component of the committer header-field'
    'committerdate:the date component of the committer header-field'
    'taggername:the name component of the tagger header-field'
    'taggeremail:the email component of the tagger header-field'
    'taggerdate:the date component of the tagger header-field'
    'creatorname:the name component of the creator header-field'
    'creatordate:the date component of the creator header-field'
    'subject:the subject of the message'
    'body:the body of the message'
    'body:the contents of the message (subject and body)')

  _describe -t sort-keys 'sort key' sort_keys $*
}

(( $+functions[__git_signoff_file] )) ||
__git_signoff_file () {
  _alternative \
    'signoffs:signoff:(yes true me please)' \
    'files:signoff file:_files'
}

(( $+functions[__git_stashes] )) ||
__git_stashes () {
  local expl
  declare -a stashes

  stashes=(${${(f)"$(_call_program stashes git stash list 2>/dev/null)"}/: */})
  __git_command_successful $pipestatus || return 1

  _wanted stashes expl stash compadd $* - $stashes
}

(( $+functions[__git_svn_revisions] )) ||
__git_svn_revisions () {
  if [[ -prefix *: ]]; then
    compset -P '*:'

    _alternative \
      'revision-numbers::__git_svn_revision_numbers' \
      'symbolic-revisions:symbolic revision:((HEAD:"the topmost revision of the SVN repository"))'
  else
    _alternative \
      'revision-numbers::__git_svn_revision_numbers' \
      'symbolic-revisions:symbolic revision:__git_svn_base_revisions'
  fi
}

(( $+functions[__git_svn_base_revisions] )) ||
__git_svn_base_revisions () {
  declare -a symbolic_revisions

  symbolic_revisions=(
    'BASE:the bottommost revision of the SVN repository')

  # TODO: How do we deal with $*?
  _describe -t symbolic-revisions 'symbolic revision' symbolic_revisions -S ':' -r ': '
}

# Object Type Argument Types

(( $+functions[__git_branch_names] )) ||
__git_branch_names () {
  local expl
  declare -a branch_names

  branch_names=(${${(f)"$(_call_program branchrefs git for-each-ref --format='"%(refname)"' refs/heads 2>/dev/null)"}#refs/heads/})
  __git_command_successful $pipestatus || return 1

  _wanted branch-names expl branch-name compadd $* - $branch_names
}

(( $+functions[__git_remote_branch_names] )) ||
__git_remote_branch_names () {
  local expl
  declare -a branch_names

  branch_names=(${${(f)"$(_call_program remote-branch-refs git for-each-ref --format='"%(refname)"' refs/remotes 2>/dev/null)"}#refs/remotes/})
  __git_command_successful $pipestatus || return 1

  _wanted remote-branch-names expl 'remote branch name' compadd $* - $branch_names
}

(( $+functions[__git_commits] )) ||
__git_commits () {
  # TODO: deal with things that __git_heads and __git_tags has in common (i.e.,
  # if both exists, they need to be completed to heads/x and tags/x.
  _alternative \
    'heads::__git_heads' \
    'commit-tags::__git_commit_tags' \
    'commit-objects::__git_commit_objects'
}

(( $+functions[__git_heads] )) ||
__git_heads () {
  local gitdir expl start
  declare -a heads

  heads=(${${(f)"$(_call_program headrefs git for-each-ref --format='"%(refname)"' refs/heads refs/remotes 2>/dev/null)"}#refs/(heads|remotes)/})
  gitdir=$(_call_program gitdir git rev-parse --git-dir 2>/dev/null)
  if __git_command_successful $pipestatus; then
    for f in HEAD FETCH_HEAD ORIG_HEAD MERGE_HEAD; do
      [[ -f $gitdir/$f ]] && heads+=$f
    done
  fi

  _wanted heads expl head compadd $* - $heads
}

(( $+functions[__git_commit_objects] )) ||
__git_commit_objects () {
  _guard '[[:xdigit:]](#c,40)' 'commit object name'
}

(( $+functions[__git_blob_objects] )) ||
__git_blob_objects () {
  _guard '[[:xdigit:]](#c,40)' 'blob object name'
}

(( $+functions[__git_blobs] )) ||
__git_blobs () {
  _alternative \
    'blob-tags::__git_blob_tags' \
    'blob-objects::__git_blob_objects'
}

(( $+functions[__git_blobs_and_trees_in_treeish] )) ||
__git_blobs_and_trees_in_treeish () {
  compset -P '*:'
  [[ -n ${IPREFIX} ]] || return 1
  if [[ -n ${IPREFIX%:} ]]; then
    __git_is_treeish ${IPREFIX%:} && __git_tree_files ${PREFIX:-.} ${IPREFIX%:}
  else
    __git_changed-in-index_files
  fi
}

(( $+functions[__git_committishs] )) ||
__git_committishs () {
  __git_commits
}

(( $+functions[__git_revisions] )) ||
__git_revisions () {
  # TODO: deal with prefixes and suffixes listed in git-rev-parse
  __git_commits $*
}

(( $+functions[__git_commits2] )) ||
__git_commits2 () {
  compset -P '\\\^'
  __git_commits
}

(( $+functions[__git_commit_ranges] )) ||
__git_commit_ranges () {
  if compset -P '*..(.|)'; then
    __git_commits $*
  else
    __git_commits $* -qS ..
  fi
}

(( $+functions[__git_commit_ranges2] )) ||
__git_commit_ranges2 () {
  _alternative \
    'commits::__git_commits2' \
    'ranges::__git_commit_ranges'
}

(( $+functions[__git_trees] )) ||
__git_trees () {
  __git_objects
}

(( $+functions[__git_tree_ishs] )) ||
__git_tree_ishs () {
  __git_commits
}

(( $+functions[__git_objects] )) ||
__git_objects () {
  compset -P '*:'
  if [[ -n $IPREFIX ]]; then
    __git_tree_files "$PREFIX" "${IPREFIX%:}"
  else
    _alternative \
      'revisions::__git_revisions' \
      'files::__git_cached_files'
  fi
}

(( $+functions[__git_submodules] )) ||
__git_submodules () {
  local expl
  declare -a submodules

  submodules=(${${(f)"$(_call_program submodules git submodule 2>/dev/null)"}#* })
  __git_command_successful $pipestatus || return 1

  _wanted submodules expl submodule compadd $* - $submodules
}

# Tag Argument Types

(( $+functions[__git_tags] )) ||
__git_tags () {
  local expl
  declare -a tags

  tags=(${${(f)"$(_call_program tagrefs git for-each-ref --format='"%(refname)"' refs/tags 2>/dev/null)"}#refs/tags/})
  __git_command_successful $pipestatus || return 1

  _wanted tags expl tag compadd $* - $tags
}

(( $+functions[__git_commit_tags] )) ||
__git_commit_tags () {
  __git_tags_of_type commit $*
}

(( $+functions[__git_blob_tags] )) ||
__git_blob_tags () {
  __git_tags_of_type blob $*
}

(( $+functions[__git_tags_of_type] )) ||
__git_tags_of_type () {
  local type expl
  declare -a tags

  type=$1; shift

  tags=(${${(M)${(f)"$(_call_program $type-tag-refs "git for-each-ref --format='%(*objecttype)%(objecttype) %(refname)' refs/tags 2>/dev/null")"}:#$type(tag|) *}#$type(tag|) refs/tags/})
  __git_command_successful $pipestatus || return 1

  _wanted $type-tags expl "$type tag" compadd $* - $tags
}

# Reference Argument Types

(( $+functions[__git_references] )) ||
__git_references () {
  local expl

  # TODO: depending on what options are on the command-line already, complete
  # only tags or heads
  # TODO: perhaps caching is unnecessary.  usually won’t contain that much data
  # TODO: perhaps provide alternative here for both heads and tags (and use
  # __git_heads and __git_tags)
  # TODO: instead of "./.", we should be looking in the repository specified as
  # an argument to the command (but default to "./." I suppose (why not "."?))
  # TODO: deal with GIT_DIR
  if [[ $_git_refs_cache_pwd != $PWD ]]; then
    _git_refs_cache=(${${${(f)"$(_call_program references git ls-remote ./. 2>/dev/null)"}#*$'\t'}#refs/(heads|tags)/})
    __git_command_successful $pipestatus || return 1
    _git_refs_cache_pwd=$PWD
  fi

  _wanted references expl 'references' compadd - $_git_refs_cache
}

(( $+functions[__git_local_references] )) ||
__git_local_references () {
  local expl

  if [[ $_git_local_refs_cache_pwd != $PWD ]]; then
    _git_local_refs_cache=(${${${(f)"$(_call_program references git ls-remote ./. 2>/dev/null)"}#*$'\t'}#refs/})
    __git_command_successful $pipestatus || return 1
    _git_local_refs_cache_pwd=$PWD
  fi

  _wanted references expl 'references' compadd - $_git_local_refs_cache
}

(( $+functions[__git_remote_references] )) ||
__git_remote_references () {
  __git_references
}

(( $+functions[__git_note_references] )) ||
__git_local_references () {
  local references expl

  references=(${${(M)${${(f)"$(_call_program references git ls-remote ./. 2>/dev/null)"}#*$'\t'}:#refs/notes/*}#refs/notes/})
  __git_command_successful $pipestatus || return 1

  _wanted references expl reference compadd - $references
}
(( $+functions[__git_notes_refs] )) ||
__git_notes_refs () {
  local expl
  declare -a notes_refs

  notes_refs=(${${(f)"$(_call_program notes-refs git for-each-ref --format='"%(refname)"' refs/notes 2>/dev/null)"}#$type refs/notes/})
  __git_command_successful $pipestatus || return 1

  _wanted notes-refs expl 'notes ref' compadd $* - $notes_refs
}

# File Argument Types

(( $+functions[__git_files_relative] )) ||
__git_files_relative () {
  local files file f_parts prefix p_parts tmp

  prefix=$(_call_program gitprefix git rev-parse --show-prefix 2>/dev/null)
  __git_command_successful $pipestatus || return 1

  if (( $#prefix == 0 )); then
    print $1
    return
  fi

  files=()

  # Collapse “//” and “/./” into “/”. Strip any remaining “/.” and “/”.
  for file in ${${${${${(0)1}//\/\///}//\/.\///}%/.}%/}; do
    integer i n
    (( n = $#file > $#prefix ? $#file : $#prefix ))
    for (( i = 1; i <= n; i++ )); do
      if [[ $file[i] != $prefix[i] ]]; then
        while (( i > 0 )) && [[ $file[i-1] != / ]]; do
          (( i-- ))
        done
        break
      fi
    done

    files+=${(l@${#prefix[i,-1]//[^\/]}*3@@../@)}${file[i,-1]}
  done

  print ${(pj:\0:)files}
}

(( $+functions[__git_files] )) ||
__git_files () {
  local compadd_opts opts tag description gitcdup gitprefix files expl

  zparseopts -D -E -a compadd_opts V: J: 1 2 n f X: M: P: S: r: R: q F:
  zparseopts -D -E -a opts -- -cached -deleted -modified -others -ignored -unmerged -killed x+: --exclude+:
  tag=$1 description=$2; shift 2

  gitcdup=$(_call_program gitcdup git rev-parse --show-cdup 2>/dev/null)
  __git_command_successful $pipestatus || return 1

  gitprefix=$(_call_program gitprefix git rev-parse --show-prefix 2>/dev/null)
  __git_command_successful $pipestatus || return 1

  # TODO: --directory should probably be added to $opts when --others is given.

  local pref=$gitcdup$gitprefix$PREFIX
  files=(${(0)"$(_call_program files git ls-files -z --exclude-standard $opts -- ${pref:+$pref\*} 2>/dev/null)"})
  __git_command_successful $pipestatus || return

#  _wanted $tag expl $description _files -g '{'${(j:,:)files}'}' $compadd_opts -
  _wanted $tag expl $description _multi_parts -f $compadd_opts - / files
}

(( $+functions[__git_cached_files] )) ||
__git_cached_files () {
  __git_files --cached cached-files 'cached file' $*
}

(( $+functions[__git_deleted_files] )) ||
__git_deleted_files () {
  __git_files --deleted deleted-files 'deleted file' $*
}

(( $+functions[__git_modified_files] )) ||
__git_modified_files () {
  __git_files --modified modified-files 'modified file' $*
}

(( $+functions[__git_other_files] )) ||
__git_other_files () {
  __git_files --others untracked-files 'untracked file' $*
}

(( $+functions[__git_ignored_cached_files] )) ||
__git_ignored_cached_files () {
  __git_files --ignored --cached ignored-cached-files 'ignored cached file' $*
}

(( $+functions[__git_ignored_other_files] )) ||
__git_ignored_other_files () {
  __git_files --ignored --others ignored-untracked-files 'ignored untracked file' $*
}

(( $+functions[__git_unmerged_files] )) ||
__git_unmerged_files () {
  __git_files --unmerged unmerged-files 'unmerged file' $*
}

(( $+functions[__git_killed_files] )) ||
__git_killed_files () {
  __git_files --killed killed-files 'killed file' $*
}

(( $+functions[__git_changed-in-index_files] )) ||
__git_changed-in-index_files () {
  local files expl

  files=$(_call_program files git diff-index -z --name-only --no-color --cached HEAD 2>/dev/null)
  __git_command_successful $pipestatus || return 1
  files=(${(0)"$(__git_files_relative $files)"})
  __git_command_successful $pipestatus || return 1

  _wanted changed-in-index-files expl 'changed in index file' _multi_parts $@ - / files
}

(( $+functions[__git_changed-in-working-tree_files] )) ||
__git_changed-in-working-tree_files () {
  local files expl

  files=$(_call_program changed-in-working-tree-files git diff -z --name-only --no-color 2>/dev/null)
  __git_command_successful $pipestatus || return 1
  files=(${(0)"$(__git_files_relative $files)"})
  __git_command_successful $pipestatus || return 1

  _wanted changed-in-working-tree-files expl 'changed in working tree file' _multi_parts $@ -f - / files
}

(( $+functions[__git_changed_files] )) ||
__git_changed_files () {
  _alternative \
    'changed-in-index-files::__git_changed-in-index_files' \
    'changed-in-working-tree-files::__git_changed-in-working-tree_files'
}

(( $+functions[__git_tree_files] )) ||
__git_tree_files () {
  local multi_parts_opts
  local tree Path
  integer at_least_one_tree_added
  local -a tree_files compadd_opts

  zparseopts -D -E -a compadd_opts V: J: 1 2 n f X: M: P: S: r: R: q F:

  [[ "$1" == */ ]] && Path="$1" || Path="${1:h}/"
  shift
  (( at_least_one_tree_added = 0 ))
  for tree in $*; do
    tree_files+=(${(ps:\0:)"$(_call_program tree-files git ls-tree --name-only -z $tree $Path 2>/dev/null)"})
    __git_command_successful $pipestatus && (( at_least_one_tree_added = 1 ))
  done

  if (( !at_least_one_tree_added )); then
    return 1
  fi

  local expl
  _wanted files expl 'tree file' _multi_parts -f $compadd_opts -- / tree_files
}

# Repository Argument Types

(( $+functions[__git_remote_repositories] )) ||
__git_remote_repositories () {
  local service

  service= _ssh

  if compset -P '*:'; then
    _remote_files -/ -- ssh
  else
    _ssh_hosts -S:
  fi
}

(( $+functions[__git_repositories] )) ||
__git_repositories () {
  _alternative \
    'local-repositories::__git_local_repositories' \
    'remote-repositories::__git_remote_repositories'
}

(( $+functions[__git_local_repositories] )) ||
__git_local_repositories () {
  local expl

  _wanted local-repositories expl 'local repositories' _directories
}

(( $+functions[__git_any_repositories] )) ||
__git_any_repositories () {
  # TODO: should also be $GIT_DIR/remotes/origin
  _alternative \
    'local-repositories::__git_local_repositories' \
    'remotes: :__git_remotes' \
    'remote-repositories::__git_remote_repositories'
}

# Common Guards

(( $+functions[__git_guard] )) ||
__git_guard () {
  declare -A opts

  zparseopts -K -D -A opts M: J: V: 1 2 n F: X:

  [[ "$PREFIX$SUFFIX" != $~1 ]] && return 1

  if (( $+opts[-X] )); then
    _message -r $opts[-X]
  else
    _message -e $2
  fi

  [[ -n "$PREFIX$SUFFIX" ]]
}

__git_guard_branch-name () {
  if [[ -n $PREFIX$SUFFIX ]]; then
    _call_program check-ref-format git check-ref-format "refs/heads/$PREFIX$SUFFIX" &>/dev/null
    (( ${#pipestatus:#0} > 0 )) && return 1
  fi

  _message -e 'branch name'

  [[ -n $PREFIX$SUFFIX ]]
}

__git_guard_diff-stat-width () {
  if [[ $PREFIX == *,* ]]; then
    compset -P '*,'
    __git_guard_number 'filename width'
  else
    compset -S ',*'
    __git_guard_number width
  fi
}

(( $+functions[__git_guard_number] )) ||
__git_guard_number () {
  declare -A opts

  zparseopts -K -D -A opts M: J: V: 1 2 n F: X:

  _guard '[[:digit:]]#' ${1:-number}
}

(( $+functions[__git_guard_bytes] )) ||
__git_guard_bytes () {
  _guard '[[:digit:]]#([kKmMgG]|)' $*
}

(( $+functions[__git_datetimes] )) ||
__git_datetimes () {
  # TODO: Use this in more places.
  _guard '*' 'time specification'
}

(( $+functions[__git_stages] )) ||
__git_stages () {
  __git_guard $* '[[:digit:]]#' 'stage'
}

(( $+functions[__git_svn_revision_numbers] )) ||
__git_svn_revision_numbers () {
  __git_guard_number 'revision number'
}

# _arguments Helpers

(( $+functions[__git_setup_log_options] )) ||
__git_setup_log_options () {
  # TODO: Need to implement -<n> for limiting the number of commits to show.
  log_options=(
    '(- *)-h[display help]'
    '(           --no-decorate)--decorate=-[print out ref names of any commits that are shown]: :__git_log_decorate_formats'
    '(--decorate              )--no-decorate[do not print out ref names of any commits that are shown]'
    '--source[show which ref each commit is reached from]')
}

(( $+functions[__git_setup_diff_options] )) ||
__git_setup_diff_options () {
  local diff_types='(-p -u --patch -U --unified --raw --patch-with-raw --stat --numstat --shortstat --dirstat --dirstat-by-file --summary --patch-with-stat --name-only --name-status --cumulative)'

  diff_options=(
    $diff_types{-p,-u,--patch}'[generate diff in patch format]'
    $diff_types{-U,--unified=}'[generate diff with given lines of context]: :__git_guard_number lines'
    $diff_types'--raw[generate default raw diff output]'
    $diff_types'--patch-with-raw[generate patch but also keep the default raw diff output]'
    '--patience[generate diffs with patience algorithm]'
    $diff_types'--stat=-[generate diffstat instead of patch]:: :__git_guard_diff-stat-width'
    $diff_types'--numstat[generate more machine-friendly diffstat]'
    $diff_types'--shortstat[generate summary diffstat]'
    $diff_types'--dirstat=-[generate dirstat by amount of changes]:: :__git_guard_number limit'
    $diff_types'--dirstat-by-file=-[generate dirstat by number of files]:: :__git_guard_number limit'
    $diff_types'--summary[generate condensed summary of extended header information]'
    $diff_types'--patch-with-stat[generate patch and prepend its diffstat]'
    '-z[use NUL termination on output]'
    $diff_types'--name-only[show only names of changed files]'
    $diff_types'--name-status[show only names and status of changed files]'
    '--submodule=-[select output format for submodule differences]::format:((short\:"show pairs of commit names"
                                                                            log\:"list commits like git submodule does (default)"))'
    '(        --no-color --color-words)--color=-[show colored diff]:: :__git_color_whens'
    '(--color            --color-words)--no-color[turn off colored diff]'
    '--word-diff=-[show word diff]::mode:((color\:"highlight changed words using color"
                                          plain\:"wrap deletions and insertions with markers"
                                          porcelain\:"use special line-based format for scripts"
                                          none\:"disable word diff"))'
    '--word-diff-regex=-[specify what constitutes a word]:word regex'
    '(--color --no-color              )--color-words=-[show colored-word diff]::word regex'
    '--no-renames[turn off rename detection]'
    '--check[warn if changes introduce trailing whitespace or space/tab indents]'
    '--full-index[show full object name of pre- and post-image blob]'
    '(--full-index)--binary[in addition to --full-index, output binary diffs for git-apply]'
    '--abbrev=[set minimum SHA1 display-length]: :__git_guard_number length'
    # TODO: --break-rewrites is undocumented.
    '(-B --break-rewrites)'{-B-,--break-rewrites=-}'[break complete rewrite changes into pairs of given size]:: :__git_guard_number size'
    # TODO: --detect-renames is undocumented.
    '(-M --detect-renames)'{-M-,--detect-renames=-}'[detect renames with given scope]:: :__git_guard_number size'
    # TODO: --detect-copies is undocumented.
    '(-C --detect-copies)'{-C-,--detect-copies=-}'[detect copies as well as renames with given scope]:: :__git_guard_number size'
    '--find-copies-harder[try harder to find copies]'
    '-l-[limit number of rename/copy targets to run]: :__git_guard_number'
    '--diff-filter=-[select certain kinds of files for diff]: :_guard "[ACDMRTUXB*]#" kinds'
    '-S-[look for differences that contain the given string]:string'
    '--pickaxe-all[when -S finds a change, show all changes in that changeset]'
    '--pickaxe-regex[treat argument of -S as regular expression]'
    '-O-[output patch in the order of glob-pattern lines in given file]: :_files'
    '-R[do a reverse diff]'
    '--relative=-[exclude changes outside and output relative to given directory]:: :_directories'
    '(-a --text)'{-a,--text}'[treat all files as text]'
    '--ignore-space-at-eol[ignore changes in whitespace at end of line]'
    '(-b --ignore-space-change -w --ignore-all-space)'{-b,--ignore-space-change}'[ignore changes in amount of white space]'
    '(-b --ignore-space-change -w --ignore-all-space)'{-w,--ignore-all-space}'[ignore white space when comparing lines]'
    '--inter-hunk-context=[combine hunks closer than n lines]:n'
    '--exit-code[report exit code 1 if differences, 0 otherwise]'
    '(--exit-code)--quiet[disable all output]'
    '(           --no-ext-diff)--ext-diff[allow external diff helper to be executed]'
    '(--ext-diff              )--no-ext-diff[disallow external diff helper to be executed]'
    '--ignore-submodules[ignore changes to submodules]:: :__git_ignore_submodules_whens'
    '(--no-prefix)--src-prefix=[use given prefix for source]:prefix'
    '(--no-prefix)--dst-prefix=[use given prefix for destination]:prefix'
    '(--src-prefix --dst-prefix)--no-prefix[do not show any source or destination prefix]'

    '(-0 -1 -2 -3 --base --ours --theirs -c --cc --no-index)'{-1,--base}'[diff against "base" version]'
    '(-0 -1 -2 -3 --base --ours --theirs -c --cc --no-index)'{-2,--ours}'[diff against "our branch" version]'
    '(-0 -1 -2 -3 --base --ours --theirs -c --cc --no-index)'{-3,--theirs}'[diff against "their branch" version]'
    '(-0 -1 -2 -3 --base --ours --theirs -c --cc --no-index)-0[omit diff output for unmerged entries]'
    '(-0 -1 -2 -3 --base --ours --theirs -c --cc --no-index)'{-c,--cc}'[compare "our branch", "their branch" and working tree files]'
    '-q[remain silent even on nonexisting files]'

    # TODO: --cumulative is undocumented.
    '--cumulative[undocumented]'
    # TODO: --follow is undocumented.
    '--follow[undocumented]'
    # TODO: --textconv is undocumented.
    '--textconv[undocumented]'
    # TODO: --no-textconv is undocumented.
    '--no-textconv[undocumented]'
    # TODO: -G is undocumented.
    '-G[undocumented]'
    # TODO: --output is undocumented.
    '--output[undocumented]:undocumented')
}

(( $+functions[__git_setup_revision_options] )) ||
__git_setup_revision_options () {
  local -a diff_options
  __git_setup_diff_options

  revision_options=(
    $diff_options
    # TODO: format pretty print format is a lot more advanced than this.
    # TODO: You can’t actually specify --format without a format.
    '(-v --header)'{--pretty=-,--format=-}'[pretty print commit messages]::format:((oneline\:"commit-ids and subject of messages"
                                                                                    short\:"few headers and only subject of messages"
                                                                                    medium\:"most parts of messages"
                                                                                    full\:"all parts of commit messages"
                                                                                    fuller\:"like full and includes dates"
                                                                                    email\:"use email headers like From and Subject"
                                                                                    raw\:"the raw commits"
                                                                                    format\:"specify own format"))'
    '--abbrev-commit[show only partial prefixes of commit object names]'
    '--oneline[shorthand for --pretty=oneline --abbrev-commit]'
    '--encoding=-[output log messages in given encoding]:: :__git_encodings'
    '(--no-notes --show-notes --standard-notes --no-standard-notes)--no-notes[do not show notes that annotate commit]'
    '(--no-notes --show-notes --standard-notes --no-standard-notes)--show-notes[do not show notes that annotate commit]:: :__git_note_references'
    '(--no-notes --show-notes --standard-notes --no-standard-notes)--no-standard-notes[enable populating notes ref list from core.notesRef and notes.displayRef]'
    '(--no-notes --show-notes --standard-notes --no-standard-notes)--no-standard-notes[disable populating notes ref list from core.notesRef and notes.displayRef]'
    '(                --date)--relative-date[show dates relative to current time]'
    '(--relative-date       )--date=-[format of date output]: :__git_date_formats'
    '--parents[display parents of commit]'
    '--children[display children of commit]'
    '--left-right[mark which side of symmetric diff commit is reachable from]'
    '--graph[display graphical representation of commit history]'
    '--count[display how many commits would have been listed]'
    '(-n --max-count)'{-n+,--max-count=}'[maximum number of commits to display]: :__git_guard_number'
    '--skip=[skip given number of commits before output]: :__git_guard_number'
    '(--max-age --since --after)'{--since=,--after=}'[show commits more recent than given date]:date'
    '(--min-age --until --before)'{--until=,--before=}'[show commits older than given date]: :__git_guard_number timestamp'
    '(          --since --after)--max-age=-[maximum age of commits to output]: :__git_guard_number timestamp'
    '(          --until --before)--min-age[minimum age of commits to output]: :__git_guard_number timestamp'
    '*--author=[limit commits to those by given author]:author'
    '*--committer=[limit commits to those by given committer]:committer'
    '*--grep=[limit commits to those with log messages matching the given pattern]:pattern'
    '--all-match[limit commits to ones matching all --grep, --author, and --committer]'
    '(-i --regexp-ignore-case)'{-i,--regexp-ignore-case}'[match regexps ignoring case]'
    '(-E --extended-regexp)'{-E,--extended-regexp}'[use POSIX extended regexps]'
    '(-F --fixed-strings)'{-F,--fixed-strings}'[do not interpret patterns as regexps]'
    '--remove-empty[stop when given path disappears from tree]'
    '--merges[display only merge commits]'
    '--no-merges[do not display commits with more than one parent]'
    '--first-parent[follow only first parent from merge commits]'
    '*--not[reverses meaning of ^ prefix for revisions that follow]'
    '--all[show all commits from refs]'
    '--branches=-[show all commits from refs/heads]::pattern'
    '--tags=[-show all commits from refs/tags]::pattern'
    '--remotes=[-show all commits from refs/remotes]::pattern'
    '--glob=[show all commits from refs matching glob]:pattern'
    '--stdin[read commit objects from standard input]'
    '--cherry-pick[omit any same-change commits]'
    '(-g --walk-reflogs --reverse)'{-g,--walk-reflogs}'[walk reflog entries from most recent to oldest]'
    '--merge[after a failed merge, show refs that touch files having a conflict]'
    '--boundary[output uninteresting commits at boundary]'
    '--simplify-by-decoration[show only commits that are referenced by a ref]'
    '(               --dense --sparse --simplify-merges --ancestry-path)--full-history[do not prune history]'
    '(--full-history         --sparse --simplify-merges --ancestry-path)--dense[only display selected commits, plus meaningful history]'
    '(--full-history --dense          --simplify-merges --ancestry-path)--sparse[when paths are given, display only commits that changes any of them]'
    '(--full-history --dense --sparse                   --ancestry-path)--simplify-merges[milder version of --full-history]'
    '(--full-history --dense --sparse --simplify-merges                )--ancestry-path[only display commits that exists directly on ancestry chains]'
    '(             --date-order)--topo-order[display commits in topological order]'
    '(--topo-order             )--date-order[display commits in date order]'
    '(-g --walk-reflogs)--reverse[display commits in reverse order]'
    '(          --objects-edge)--objects[display object ids of objects referenced by listed commits]'
    '(--objects               )--objects-edge[display object ids of objects referenced by listed and excluded commits]'
    '(          --do-walk)--no-walk[only display given revs, do not traverse their ancestors]'
    '(--no-walk          )--do-walk[only display given revs, traversing their ancestors]'

    # TODO: --reflog is undocumented.
    '--reflog[show all commits from reflogs]'
    # TODO: --default is undocumented.
    '--default[use argument as default revision]:default revision:__git_revisions'
    # TODO: --full-diff is undocumented.
    '(-c --cc            )--full-diff[undocumented]'
    # TODO: --abrev is undocumented.
    '--abbrev=[set minimum SHA1 display-length]: :__git_guard_number length'
    # TODO: --no-abbrev is undocumented.
    '--no-abbrev[undocumented]'
    # TODO: --early-output is undocumented.
    '--early-output=-[undocumented]::undocumented'
    # TODO: --log-size is undocumented.
    '--log-size[undocumented]')

  if (( words[(I)--objects(|-edge)] )); then
    revision_options+=('--unpacked[print object IDs not in packs]')
  fi
}

(( $+functions[__git_setup_merge_options] )) ||
__git_setup_merge_options () {
  merge_options=(
    '(         --no-commit)--commit[perform the merge and commit the result]'
    '(--commit            )--no-commit[perform the merge but do not commit the result]'
    '(     --no-ff)--ff[do not generate a merge commit if the merge resolved as a fast-forward]'
    '(--ff        )--no-ff[generate a merge commit even if the merge resolved as a fast-forward]'
    '(      --no-log)--log[fill in one-line descriptions of the commits being merged in the log message]'
    '(--log         )--no-log[do not list one-line descriptions of the commits being merged in the log message]'
    '(-n --no-stat)--stat[show a diffstat at the end of the merge]'
    '(--stat -n --no-stat)'{-n,--no-stat}'[do not show diffstat at the end of the merge]'
    '(         --no-squash)--squash[merge, but do not commit]'
    '(--squash            )--no-squash[merge and commit]'
    '--ff-only[refuse to merge unless HEAD is up to date or merge can be resolved as a fast-forward]'
    '*'{-s,--strategy=}'[use given merge strategy]:merge strategy:__git_merge_strategies'
    '*'{-X,--strategy-option=}'[pass merge-strategy-specific option to merge strategy]'
    '(-q --quiet -v --verbose)'{-q,--quiet}'[suppress all output]'
    '(-q --quiet -v --verbose)'{-v,--verbose}'[output additional information]')
}

(( $+functions[__git_setup_fetch_options] )) ||
__git_setup_fetch_options () {
  fetch_options=(
    '(: *)--all[fetch all remotes]'
    '(-a --append)'{-a,--append}'[append ref names and object names of fetched refs to "$GIT_DIR/FETCH_HEAD"]'
    '--depth=[deepen the history of a shallow repository by the given number of commits]: :__git_guard_number depth'
    '--dry-run[show what would be done, without making any changes]'
    '(-f --force)'{-f,--force}'[allow refs that are not ancestors to be updated]'
    '(-k --keep)'{-k,--keep}'[keep downloaded pack]'
    '(-p --prune)'{-p,--prune}'[remove any remote tracking branches that no longer exist remotely]'
    '(-n --no-tags -t --tags)'{-n,--no-tags}'[disable automatic tag following]'
    '(--no-tags -t --tags)'{-t,--tags}'[fetch remote tags]'
    '(-u --update-head-ok)'{-u,--update-head-ok}'[allow updates of current branch head]'
    '--upload-pack=[specify path to git-upload-pack on remote side]:remote path'
    '(-q --quiet -v --verbose --progress)'{-q,--quiet}'[suppress all output]'
    '(-q --quiet -v --verbose)'{-v,--verbose}'[output additional information]'
    '(-q --quiet)--progress[output progress information]')
}

(( $+functions[__git_setup_apply_options] )) ||
__git_setup_apply_options () {
  apply_options=(
    '--whitespace=[detect a new or modified line that ends with trailing whitespaces]: :__git_apply_whitespace_strategies'
    '-p-[remove N leading slashes from traditional diff paths]: :_guard  "[[\:digit\:]]#" "number of slashes to remove"'
    '-C-[ensure at least N lines of context match before and after each change]: :_guard  "[[\:digit\:]]#" "number of lines of context"'
    '--reject[apply hunks that apply and leave rejected hunks in .rej files]'
    '(--ignore-space-change --ignore-whitespace)'{--ignore-space-change,--ignore-whitespace}'[ignore changes in whitespace in context lines]'
    '--directory=[root to prepend to all filenames]:root:_directories')
}

# Git Config Helpers

(( $+functions[__git_config_get_regexp] )) ||
__git_config_get_regexp () {
  declare -A opts

  zparseopts -A opts -D b: a:
  [[ -n $opts[-b] ]] || opts[-b]='*.'
  [[ -n $opts[-a] ]] || opts[-a]='.[^.]##'
  [[ $1 == -- ]] && shift

  set -A $2 ${${${(0)"$(_call_program ${3:-$2} "git config -z --get-regexp -- '$1'")"}#${~opts[-b]}}%%${~opts[-a]}$'\n'*}
}

(( $+functions[__git_config_sections] )) ||
__git_config_sections () {
  declare -a opts
  local regex tag desc
  local -a groups

  zparseopts -a opts -D b: a:
  regex=$1
  tag=$2
  desc=$3
  shift 3

  __git_config_get_regexp $opts -- $regex groups $tag
  # TODO: Should escape : with \: in groups.
  _describe -t $tag $desc groups $*
}

# __git_config_booleans [-t TAG] [-l LABEL] CURRENT DEFAULT DESCRIPTION [OTHER]...
#
# -t can be used to specify a tag to use (default: booleans).
# -l can be used to specify a label to use (default: boolean).
#
# The first argument is the current value, so that the description of the
# current value can be suffixed with “ (current)”.
#
# The second argument is the default value, so that the description of the
# default value can be suffixed with “ (default)”.
#
# The third argument is the description to use for the true and false values.
#
# The rest of the arguments can be used to provide additional “boolean” values
# that should be included.  They should be of the form that _describe expects.
(( $+functions[__git_config_booleans] )) ||
__git_config_booleans () {
  local tag label current default description
  declare -a booleans

  zparseopts -D t=tag l=label
  current=$1
  default=${2:-true}
  description=$3
  shift 3
  booleans=(
    {true,yes,on}":$description"
    {false,no,off}":do not $description"
    $*)

  __git_config_values -t ${tag:-booleans} -l ${label:-boolean} -- "$current" $default $booleans
}

# __git_config_values [-t TAG] [-l LABEL] CURRENT DEFAULT [VALUES]...
#
# -t can be used to specify a tag to use (default: values).
# -l can be used to specify a label to use (default: value).
#
# The first argument is the current value, so that the description of the
# current value can be suffixed with “ (current)”.
#
# The second argument is the default value, so that the description of the
# default value can be suffixed with “ (default)”.
#
# The rest of the arguments are values of the form VALUE:DESCRIPTION to be
# passed to _describe.
(( $+functions[__git_config_values] )) ||
__git_config_values () {
  declare -A opts
  local current default key
  declare -a values

  zparseopts -A opts -D t: l:
  [[ $1 == -- ]] && shift
  current=$1
  default=$2
  shift 2
  values=($*)
  [[ -n $current ]] && values[(r)$(__git_pattern_escape $default):*]+=' (current)'
  values[(r)$(__git_pattern_escape $default):*]+=' (default)'

  _describe -t ${opts[-t]:-values} ${opts[-l]:-value} values
}

# Git Config Sections and Types
(( $+functions[__git_browsers] )) ||
__git_browsers () {
  integer ret=1
  local expl
  declare -a userbrowsers builtinbrowsers

  __git_config_get_regexp '^browser\..+\.cmd$' userbrowsers
  builtinbrowsers=(
    firefox
    iceweasel
    konquerer
    w3m
    links
    lynx
    dillo
    open
    start)

  _tags user-browsers builtin-browsers

  while _tags; do
    _requested user-browsers expl 'user-defined browser' compadd $* - $userbrowsers && ret=0
    _requested builtin-browsers expl 'builtin browser' compadd $* - $builtinbrowsers && ret=0

    (( ret )) || break
  done

  return ret
}

(( $+functions[__git_difftools] )) ||
__git_difftools () {
  __git_diff-or-merge-tools diff $*
}

(( $+functions[__git_diff-or-merge-tools] )) ||
__git_diff-or-merge-tools () {
  local type=$1; shift
  integer ret=1
  local expl
  declare -a userdifftools usermergetools builtintools builtindifftools builtinmergetools

  [[ $type == diff ]] && __git_config_get_regexp '^difftool\..+\.cmd$' userdifftools
  __git_config_get_regexp '^mergetool\..+\.cmd$' usermergetools
  builtintools=(
    kdiff3
    tkdiff
    xxdiff
    meld
    opendiff
    vimdiff
    gvimdiff
    vimdiff2
    gvimdiff2
    emerge
    ecmerge
    diffuse
    araxis
    p4merge)

  builtindifftools=($builtintools kompare)
  builtinmergetools=($builtintools tortoisemerge)

  case $type in
    (diff) _tags user-difftools builtin-difftools user-mergetools ;;
    (merge) _tags user-mergetools builtin-mergetools ;;
  esac

  while _tags; do
    _requested user-difftools expl 'user-defined difftool' compadd $* - $userdifftools && ret=0
    _requested user-mergetools expl 'user-defined mergetool' compadd $* - $usermergetools && ret=0
    _requested builtin-difftools expl 'builtin difftool' compadd $* - $builtindifftools && ret=0
    _requested builtin-mergetools expl 'builtin mergetool' compadd $* - $builtinmergetools && ret=0

    (( ret )) || break
  done

  return ret
}

(( $+functions[__git_mergetools] )) ||
__git_mergetools () {
  __git_diff-or-merge-tools merge $*
}

(( $+functions[__git_merge_drivers] )) ||
__git_merge_drivers () {
  __git_config_sections '^merge\..+\.name$' merge-drivers 'merge driver' $*
}

(( $+functions[__git_builtin_merge_drivers] )) ||
__git_builtin_merge_drivers () {
  local -a builtin_merge_drivers
  builtin_merge_drivers=(
    text:'normal 3-way file-level merge for text files'
    binary:'binary file merge driver'
    union:'run 3-way file-levele merge with lines from both versions')
  _describe -t builtin-merge-drivers 'builtin merge driver' builtin_merge_drivers $*
}

(( $+functions[__git_man_viewers] )) ||
__git_man_viewers () {
  # TODO: Add support for standard commands.
  __git_config_sections '^man\..+\.cmd$' man-viewers 'man viewer' $*
}

(( $+functions[__git_svn-remotes] )) ||
__git_svn-remotes () {
  __git_config_sections -a '(|)' '^svn-remote\..+$' svn-remotes 'svn remote' $*
}

(( $+functions[__git_remote-groups] )) ||
__git_remote-groups () {
  __git_config_sections -a '(|)' '^remotes\..+$' remotes-groups 'remotes group' $*
}

(( $+functions[__git_remotes_groups] )) ||
__git_remotes_groups () {
  local expl

  _wanted remotes-groups expl 'remotes group' \
    compadd $* - ${${${(0)"$(_call_program remotes-groups git config --get-regexp -z '"^remotes\..*$"')"}%%$'\n'*}#remotes.}

}

(( $+functions[__git_sendemail_identities] )) ||
__git_sendemail_identities () {
  __git_config_sections '^sendemail\..+\.[^.]+$' identities 'sendemail identity' $*
}

(( $+functions[__git_sendemail_smtpencryption_values] )) ||
__git_sendemail_smtpencryption_values () {
  __git_config_values -- "$current" "$parts[5]" \
    ssl:'use SSL' \
    tls:'use TLS'
}

(( $+functions[__git_sendemail_confirm_values] )) ||
__git_sendemail_confirm_values () {
  __git_config_values -- "$current" "$parts[5]" \
    always:'always confirm before sending' \
    never:'never confirm before sending' \
    cc:'confirm before sending to automatically added Cc-addresses' \
    compose:'confirm before sending first message when using --compose' \
    auto:'same as cc together with compose'
}

(( $+functions[__git_sendemail_suppresscc_values] )) ||
__git_sendemail_suppresscc_values () {
  __git_config_values -- "$current" "$parts[5]" \
    author:'avoid including patch author' \
    self:'avoid including sender' \
    cc:'avoid including anyone mentioned in Cc lines except for self' \
    bodycc:'avoid including anyone mentiond in Cc lines in patch body except for self' \
    sob:'avoid including anyone mentiond in Signed-off-by lines except for self' \
    cccmd:'avoid running --cc-cmd' \
    body:'equivalent to sob + bodycc' \
    all:'avoid all auto Cc values'
}

(( $+functions[__git_colors] )) ||
__git_colors () {
  declare -a colors

  colors=(black red green yellow blue magenta cyan white)

  _describe -t colors color colors $*
}

(( $+functions[__git_color_attributes] )) ||
__git_color_attributes () {
  declare -a attributes

  attributes=(bold dim ul blink reverse)

  _describe -t attributes attribute attributes $*
}

# Now, for the main driver…
_git() {
  if (( CURRENT > 2 )); then
    local -a aliases
    local -A git_aliases
    # TODO: Should use -z here, but I couldn’t get it to work.
    aliases=(${(f)${${${(f)"$(_call_program aliases git config --get-regexp '\^alias\.')"}#alias.}/ /$'\n'}/(#e)/$'\n'})
    (( $#aliases % 2 == 0 )) && git_aliases=($aliases)

    if (( $+git_aliases[$words[2]] && !$+commands[git-$words[2]] && !$+functions[_git-$words[2]] )); then
      local -a tmpwords expalias
      expalias=(${(z)git_aliases[$words[2]]})
      tmpwords=(${words[1]} ${expalias})
      if [[ -n "${words[3,-1]}" ]] ; then
          tmpwords+=(${words[3,-1]})
      fi
      [[ -n ${words[$CURRENT]} ]] || tmpwords+=('')
      (( CURRENT += ${#expalias} - 1 ))
      words=("${tmpwords[@]}")
      unset tmpwords expalias
    fi

    unset git_aliases aliases
  fi

  integer ret=1

  if [[ $service == git ]]; then
    local curcontext=$curcontext state line
    declare -A opt_args

    # TODO: This needs an update
    # TODO: How do we fix -c argument?
    _arguments -C \
      '(- :)--version[display version information]' \
      '(- :)--help[display help message]' \
      '-c[pass configuration parameter to command]:parameter' \
      '--exec-path=-[path containing core git-programs]:: :_directories' \
      '--html-path[display path to HTML documentation and exit]' \
      '(-p --paginate)'{-p,--paginate}'[pipe output into $PAGER]' \
      '--no-pager[do not pipe git output into a pager]' \
      '--git-dir=-[path to repository]: :_directories' \
      '--work-tree=-[path to working tree]: :_directories' \
      '--bare[use $PWD as repository]' \
      '--no-replace-objects[do not use replacement refs to replace git objects]' \
      '(-): :->command' \
      '(-)*:: :->option-or-argument' && return

    case $state in
      (command)
        _git_commands && ret=0
        ;;
      (option-or-argument)
        curcontext=${curcontext%:*:*}:git-$words[1]:

        if (( $+functions[_git-$words[1]] )); then
          _call_function ret _git-$words[1]
        elif zstyle -T :completion:$curcontext: use-fallback; then
          _files && ret=0
        else
          _message 'unknown sub-command'
        fi
        ;;
    esac
  else
    _call_function ret _$service
  fi

  return ret
}

# Load any _git-* definitions so that they may be completed as commands.
declare -gUa _git_third_party_commands
_git_third_party_commands=()

local file
for file in ${^fpath}/_git-*~(*~|*.zwc)(.N); do
  local name=${${file:t}#_git-}
  if (( $+_git_third_party_commands[$name] )); then
    continue
  fi

  local desc=
  integer i=1
  while read input; do
    if (( i == 2 )); then
      if [[ $input == '#description '* ]]; then
        desc=:${input#\#description }
      fi
      break
    fi
    (( i++ ))
  done < $file

  _git_third_party_commands+=$name$desc
done

_git