bin_path(): use builtin commands and avoid which

lib/git/aliases.sh

@@ -17,7 +17,7 @@ unalias git > /dev/null 2>&1
 unset -f git > /dev/null 2>&1
 
 # Use the full path to git to avoid infinite loop with git function
-export _git_cmd="$(\which git)"
+export _git_cmd="$(bin_path git)"
 # Wrap git with the 'hub' github wrapper, if installed (https://github.com/defunkt/hub)
 if type hub > /dev/null 2>&1; then export _git_cmd="hub"; fi
 

lib/git/helpers.sh

@@ -13,4 +13,11 @@ function fail_if_not_git_repo() {
     return 1
   fi
   return 0
-}
+}
+
+bin_path() {
+  if [[ -n ${ZSH_VERSION:-} ]];
+    then builtin whence -cp "$1" 2> /dev/null
+    else builtin type -P "$1"
+  fi
+}

lib/git/shell_shortcuts.sh

@@ -108,7 +108,7 @@ fi
 
 # Function wrapper around 'll'
 # Adds numbered shortcuts to output of ls -l, just like 'git status'
-if [ "$shell_ls_aliases_enabled" = "true" ] && which ruby > /dev/null 2>&1; then
+if [ "$shell_ls_aliases_enabled" = "true" ] && builtin command -v ruby > /dev/null 2>&1; then
   unalias ll > /dev/null 2>&1; unset -f ll > /dev/null 2>&1
   function ls_with_file_shortcuts {
     local ll_output