Prompt fixes in zsh.

dotfiles/lib/shellrc/aliases.sh

@@ -35,6 +35,8 @@ command -v md5sum > /dev/null || alias md5sum="md5"
 # OS X has no `sha1sum`, so use `shasum` as a fallback
 command -v sha1sum > /dev/null || alias sha1sum="shasum"
 
+command -v greadlink > /dev/null && alias readlink="greadlink"
+
 # URL-encode strings
 alias urlencode='python -c "import sys, urllib as ul; print ul.quote_plus(sys.argv[1]);"'
 

dotfiles/lib/shellrc/functions.sh

@@ -4,8 +4,12 @@ function parse_git_branch() {
     echo ${ref#refs/heads/}
 }
 
+function git_is_dirty() {
+    git diff-index --quiet --cached HEAD && git diff-files --quiet
+}
+
 function current_shell() {
-    ps -p $$ | tail -1 | awk '{print $NF}' | xargs which | xargs readlink -f
+    greadlink -f $(which "$(ps -p $$ | tail -1 | awk '{print $NF}' | sed 's/\-//')")
 }
 
 function is_zsh() {

dotfiles/lib/shellrc/yelp.sh

@@ -51,7 +51,8 @@ function sandbox_prompt_info() {
     if [ "$YELP_IN_SANDBOX" ];
     then
         sandbox_string=$sandbox_string"sandbox-$(get_sandbox_identifier)"
-    else
+    elif [ ! -z $(env | grep YELP) ];
+    then
         sandbox_string="no sandbox"
     fi
     echo $sandbox_string
@@ -77,11 +78,11 @@ function zsh_sandbox_color() {
 }
 
 function colored_sandbox_string() {
-    if [ is_zsh ]
+    if [ is_zsh ];
     then
 	sandbox_color=$(zsh_sandbox_color)
     else
 	sandbox_color=$(bash_sandbox_color)
     fi
-    echo $sandbox_color$(sandbox_prompt_info)
+    echo "$sandbox_color$(sandbox_prompt_info)%{$reset_color%}"
 }