# get the name of the branch we are on
 function git_prompt_info() {

   [[ "$GIT_PROMPT_DISABLED" != "" ]] && return

   ref=$(git symbolic-ref HEAD 2>&1)
   if [[ $? == 0 ]]; then
     echo "$ZSH_THEME_GIT_PROMPT_PREFIX${ref#refs/heads/}$(git_prompt_status)$ZSH_THEME_GIT_PROMPT_SUFFIX"
     return
   fi
 
   if [[ $ref =~ "Not a git repository" ]]; then
     return
   fi
 
   echo "${ZSH_THEME_GIT_PROMPT_PREFIX}no-branch$ZSH_THEME_GIT_PROMPT_UNMERGED$ZSH_THEME_GIT_PROMPT_SUFFIX"

 }

 function disable_git_prompt_info() {
   GIT_PROMPT_DISABLED=1
 }
 

 # Checks if working tree is dirty
 parse_git_dirty() {

   local SUBMODULE_SYNTAX=''

   if [[ $POST_1_7_2_GIT -gt 0 ]]; then

         SUBMODULE_SYNTAX="--ignore-submodules=dirty"
   fi
   if [[ -n $(git status -s ${SUBMODULE_SYNTAX}  2> /dev/null) ]]; then

     echo "$ZSH_THEME_GIT_PROMPT_DIRTY"
   else
     echo "$ZSH_THEME_GIT_PROMPT_CLEAN"
   fi

 }

 # Checks if there are commits ahead from remote
 function git_prompt_ahead() {

   if $(echo "$(git log origin/$(current_branch)..HEAD 2> /dev/null)" | grep '^commit' &> /dev/null); then

     echo "$ZSH_THEME_GIT_PROMPT_AHEAD"
   fi
 }
 
 # Formats prompt string for current git commit short SHA
 function git_prompt_short_sha() {
   SHA=$(git rev-parse --short HEAD 2> /dev/null) && echo "$ZSH_THEME_GIT_PROMPT_SHA_BEFORE$SHA$ZSH_THEME_GIT_PROMPT_SHA_AFTER"
 }
 
 # Formats prompt string for current git commit long SHA
 function git_prompt_long_sha() {
   SHA=$(git rev-parse HEAD 2> /dev/null) && echo "$ZSH_THEME_GIT_PROMPT_SHA_BEFORE$SHA$ZSH_THEME_GIT_PROMPT_SHA_AFTER"
 }
 
 # Get the status of the working tree

 git_prompt_status() {
   INDEX=$(git status --porcelain 2> /dev/null)
   STATUS=""
   if $(echo "$INDEX" | grep '^?? ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_UNTRACKED$STATUS"
   fi
   if $(echo "$INDEX" | grep '^A  ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_ADDED$STATUS"
   elif $(echo "$INDEX" | grep '^M  ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_ADDED$STATUS"
   fi
   if $(echo "$INDEX" | grep '^ M ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_MODIFIED$STATUS"

   elif $(echo "$INDEX" | grep '^AM ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_MODIFIED$STATUS"
   elif $(echo "$INDEX" | grep '^ T ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_MODIFIED$STATUS"

   fi
   if $(echo "$INDEX" | grep '^R  ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_RENAMED$STATUS"
   fi

   if $(echo "$INDEX" | grep '^ D ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_DELETED$STATUS"
   elif $(echo "$INDEX" | grep '^AD ' &> /dev/null); then

     STATUS="$ZSH_THEME_GIT_PROMPT_DELETED$STATUS"
   fi
   if $(echo "$INDEX" | grep '^UU ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_UNMERGED$STATUS"
   fi
   echo $STATUS

 }

 
 #compare the provided version of git to the version installed and on path
 #prints 1 if input version <= installed version
 #prints -1 otherwise 
 function git_compare_version() {
   local INPUT_GIT_VERSION=$1;
   local INSTALLED_GIT_VERSION
   INPUT_GIT_VERSION=(${(s/./)INPUT_GIT_VERSION});
   INSTALLED_GIT_VERSION=($(git --version));
   INSTALLED_GIT_VERSION=(${(s/./)INSTALLED_GIT_VERSION[3]});
 
   for i in {1..3}; do
     if [[ $INSTALLED_GIT_VERSION[$i] -lt $INPUT_GIT_VERSION[$i] ]]; then
       echo -1
       return 0
     fi
   done
   echo 1
 }
 

 #this is unlikely to change so make it all statically assigned
 POST_1_7_2_GIT=$(git_compare_version "1.7.2")
 #clean up the namespace slightly by removing the checker function
 unset -f git_compare_version