Cleanup of git-prompt plugin file

plugins/git-prompt/git-prompt.plugin.zsh

 # ZSH Git Prompt Plugin from:
 # http://github.com/olivierverdier/zsh-git-prompt
 
-export __GIT_PROMPT_DIR=${0:A:h}
+__GIT_PROMPT_DIR="${0:A:h}"
 
-export GIT_PROMPT_EXECUTABLE=${GIT_PROMPT_USE_PYTHON:-"python"}
-
-# Initialize colors.
-autoload -U colors
-colors
-
-# Allow for functions in the prompt.
-setopt PROMPT_SUBST
-
-autoload -U add-zsh-hook
-
-add-zsh-hook chpwd chpwd_update_git_vars
-add-zsh-hook preexec preexec_update_git_vars
-add-zsh-hook precmd precmd_update_git_vars
+## Hook function definitions
+function chpwd_update_git_vars() {
+    update_current_git_vars
+}
 
-## Function definitions
 function preexec_update_git_vars() {
     case "$2" in
         git*|hub*|gh*|stg*)
@@ -34,64 +23,59 @@ function precmd_update_git_vars() {
     fi
 }
 
-function chpwd_update_git_vars() {
-    update_current_git_vars
-}
+chpwd_functions+=(chpwd_update_git_vars)
+precmd_functions+=(precmd_update_git_vars)
+preexec_functions+=(preexec_update_git_vars)
 
+
+## Function definitions
 function update_current_git_vars() {
     unset __CURRENT_GIT_STATUS
 
-    if [[ "$GIT_PROMPT_EXECUTABLE" == "python" ]]; then
-        local gitstatus="$__GIT_PROMPT_DIR/gitstatus.py"
-        _GIT_STATUS=`python ${gitstatus} 2>/dev/null`
-    fi
-    if [[ "$GIT_PROMPT_EXECUTABLE" == "haskell" ]]; then
-        local gitstatus="$__GIT_PROMPT_DIR/dist/build/gitstatus/gitstatus"
-        _GIT_STATUS=`${gitstatus}`
-    fi
+    local gitstatus="$__GIT_PROMPT_DIR/gitstatus.py"
+    _GIT_STATUS=$(python ${gitstatus} 2>/dev/null)
      __CURRENT_GIT_STATUS=("${(@s: :)_GIT_STATUS}")
-	GIT_BRANCH=$__CURRENT_GIT_STATUS[1]
-	GIT_AHEAD=$__CURRENT_GIT_STATUS[2]
-	GIT_BEHIND=$__CURRENT_GIT_STATUS[3]
-	GIT_STAGED=$__CURRENT_GIT_STATUS[4]
-	GIT_CONFLICTS=$__CURRENT_GIT_STATUS[5]
-	GIT_CHANGED=$__CURRENT_GIT_STATUS[6]
-	GIT_UNTRACKED=$__CURRENT_GIT_STATUS[7]
+    GIT_BRANCH=$__CURRENT_GIT_STATUS[1]
+    GIT_AHEAD=$__CURRENT_GIT_STATUS[2]
+    GIT_BEHIND=$__CURRENT_GIT_STATUS[3]
+    GIT_STAGED=$__CURRENT_GIT_STATUS[4]
+    GIT_CONFLICTS=$__CURRENT_GIT_STATUS[5]
+    GIT_CHANGED=$__CURRENT_GIT_STATUS[6]
+    GIT_UNTRACKED=$__CURRENT_GIT_STATUS[7]
 }
 
-
 git_super_status() {
-	precmd_update_git_vars
+    precmd_update_git_vars
     if [ -n "$__CURRENT_GIT_STATUS" ]; then
-	  STATUS="$ZSH_THEME_GIT_PROMPT_PREFIX$ZSH_THEME_GIT_PROMPT_BRANCH$GIT_BRANCH%{${reset_color}%}"
-	  if [ "$GIT_BEHIND" -ne "0" ]; then
-		  STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_BEHIND$GIT_BEHIND%{${reset_color}%}"
-	  fi
-	  if [ "$GIT_AHEAD" -ne "0" ]; then
-		  STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_AHEAD$GIT_AHEAD%{${reset_color}%}"
-	  fi
-	  STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_SEPARATOR"
-	  if [ "$GIT_STAGED" -ne "0" ]; then
-		  STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_STAGED$GIT_STAGED%{${reset_color}%}"
-	  fi
-	  if [ "$GIT_CONFLICTS" -ne "0" ]; then
-		  STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_CONFLICTS$GIT_CONFLICTS%{${reset_color}%}"
-	  fi
-	  if [ "$GIT_CHANGED" -ne "0" ]; then
-		  STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_CHANGED$GIT_CHANGED%{${reset_color}%}"
-	  fi
-	  if [ "$GIT_UNTRACKED" -ne "0" ]; then
-		  STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_UNTRACKED%{${reset_color}%}"
-	  fi
-	  if [ "$GIT_CHANGED" -eq "0" ] && [ "$GIT_CONFLICTS" -eq "0" ] && [ "$GIT_STAGED" -eq "0" ] && [ "$GIT_UNTRACKED" -eq "0" ]; then
-		  STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_CLEAN"
-	  fi
-	  STATUS="$STATUS%{${reset_color}%}$ZSH_THEME_GIT_PROMPT_SUFFIX"
-	  echo "$STATUS"
-	fi
+      STATUS="$ZSH_THEME_GIT_PROMPT_PREFIX$ZSH_THEME_GIT_PROMPT_BRANCH$GIT_BRANCH%{${reset_color}%}"
+      if [ "$GIT_BEHIND" -ne "0" ]; then
+          STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_BEHIND$GIT_BEHIND%{${reset_color}%}"
+      fi
+      if [ "$GIT_AHEAD" -ne "0" ]; then
+          STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_AHEAD$GIT_AHEAD%{${reset_color}%}"
+      fi
+      STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_SEPARATOR"
+      if [ "$GIT_STAGED" -ne "0" ]; then
+          STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_STAGED$GIT_STAGED%{${reset_color}%}"
+      fi
+      if [ "$GIT_CONFLICTS" -ne "0" ]; then
+          STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_CONFLICTS$GIT_CONFLICTS%{${reset_color}%}"
+      fi
+      if [ "$GIT_CHANGED" -ne "0" ]; then
+          STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_CHANGED$GIT_CHANGED%{${reset_color}%}"
+      fi
+      if [ "$GIT_UNTRACKED" -ne "0" ]; then
+          STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_UNTRACKED%{${reset_color}%}"
+      fi
+      if [ "$GIT_CHANGED" -eq "0" ] && [ "$GIT_CONFLICTS" -eq "0" ] && [ "$GIT_STAGED" -eq "0" ] && [ "$GIT_UNTRACKED" -eq "0" ]; then
+          STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_CLEAN"
+      fi
+      STATUS="$STATUS%{${reset_color}%}$ZSH_THEME_GIT_PROMPT_SUFFIX"
+      echo "$STATUS"
+    fi
 }
 
-# Default values for the appearance of the prompt. Configure at will.
+# Default values for the appearance of the prompt.
 ZSH_THEME_GIT_PROMPT_PREFIX="("
 ZSH_THEME_GIT_PROMPT_SUFFIX=")"
 ZSH_THEME_GIT_PROMPT_SEPARATOR="|"