Add a bunch of git aliases including untracked, root and ignore.

dotfiles/gitconfig

@@ -11,9 +11,12 @@
         suir = submodule update --init --recursive
         amend = commit -a --amend -C HEAD
         modified = diff HEAD --name-only
+        untracked = "!u() { git status -s | grep "??" | awk '{print $2}'; }; u"
         dirty = "!t() { test -n \"$(git status --porcelain)\"; }; t"
         # diff tracking branch merge base
         dtbmb = !git diff `git tb`...HEAD
+        root = rev-parse --show-toplevel
+        ignore = !"i() { printf \"\n$1\" >> "`git root`/.gitignore"; }; i"
 
         branches = branch -a
 	remotes = remote -v
@@ -34,6 +37,8 @@
 	reb = "!r() { git rebase -i HEAD~$1; }; r"
         # Diff a file or show it in git's pager if it is untracked
         du = "!d() { git ls-files $1 --error-unmatch 2>/dev/null 1>/dev/null && git diff $1 || `git config --get core.pager` $1; }; d"
+        clean-branches = "!r() { git branch -r --merged ${1-origin/master} | xargs -n1 git branch -d; }; r"
+        clean-remote-branches = 
 
 [core]
 	# Use custom `.gitignore` and `.gitattributes`

dotfiles/lib/shellrc/functions.sh

@@ -97,3 +97,7 @@ function clipboard() {
         reattach-to-user-namespace pbcopy
     fi
 }
+
+function git_root() {
+    cd `git root`
+}