Remove git_prompt_info and parse_git_dirty

as they were only being used by gitster prompt theme and kept for
Oh-My-Zsh compatibility. The newly introduced git-info module (inspired
by the git-info Prezto function) provides a more powerful
implementation than the Oh-My-Zsh inspired git_prompt_info.

Updated gitster to use the git-info module.

Closes #124

modules/git/README.md

@@ -208,7 +208,6 @@ You can temporarily bypass an alias by prefixing it with a backward slash:
 Functions
 ---------
 
-  General:
   - `git-branch-current` displays the current branch.
   - `git-commit-lost` lists lost commits.
   - `git-dir` displays the path to the Git directory.
@@ -221,7 +220,3 @@ Functions
   - `git-stash-recover` recovers given dropped stashed states.
   - `git-submodule-move` moves a submodule.
   - `git-submodule-remove` removes a submodule.
-
-  Prompt:
-  - `git_prompt_info` provides git information to oh-my-zsh sourced prompts.
-  - `parse-git-dirty` needed for `git-prompt-info` to check if repo is dirty.

modules/git/functions/git_prompt_info

@@ -1,8 +0,0 @@
-# slightly modified git_prompt_info from oh-my-zsh for theme compatibility
-
-local ref
-if [[ ${zgit_hide_prompt} != 'true' ]]; then
- ref=$(command git symbolic-ref HEAD 2> /dev/null) || \
- ref=$(command git rev-parse --short HEAD 2> /dev/null) || return 0
- print "${ZSH_THEME_GIT_PROMPT_PREFIX}${ref#refs/heads/}$(parse_git_dirty)${ZSH_THEME_GIT_PROMPT_SUFFIX}"
-fi

modules/git/functions/parse_git_dirty

@@ -1,17 +0,0 @@
-# slightly modified parse_git_dirty from oh-my-zsh for theme compatibility
-# not supporting git < 1.7.2; upgrade your shit
-
-local STATUS=''
-local FLAGS
-FLAGS=('--porcelain' '--ignore-submodules=dirty')
-if [[ ${zgit_hide_prompt} != 'true' ]]; then
-  if [[ "${zgit_disable_untracked_dirty}" == "true" ]]; then
-    FLAGS+='--untracked-files=no'
-  fi
-  STATUS=$(command git status ${FLAGS} 2> /dev/null | tail -n1)
-fi
-if [[ -n ${STATUS} ]]; then
-  print ${ZSH_THEME_GIT_PROMPT_DIRTY}
-else
-  print ${ZSH_THEME_GIT_PROMPT_CLEAN}
-fi

modules/prompt/themes/gitster.zsh-theme

@@ -3,31 +3,37 @@
 # https://github.com/shashankmehta/dotfiles/blob/master/thesetup/zsh/.oh-my-zsh/custom/themes/gitster.zsh-theme
 #
 
-gst_get_status() {
-  print "%(?:%F{10}➜ :%F{9}➜ %s)"
+prompt_gitster_get_status() {
+  print '%(?:%F{green}➜:%F{red}➜) '
 }
 
-gst_get_pwd() {
-  prompt_short_dir="$(short_pwd)"
-  git_root="$(command git rev-parse --show-toplevel 2> /dev/null)" && \
-  prompt_short_dir="${prompt_short_dir#${$(short_pwd $git_root):h}/}"
+prompt_gitster_get_pwd() {
+  prompt_short_dir=$(short_pwd)
+  git_root=$(command git rev-parse --show-toplevel 2> /dev/null) && prompt_short_dir=${prompt_short_dir#${$(short_pwd $git_root):h}/}
   print ${prompt_short_dir}
 }
 
 prompt_gitster_precmd() {
-  PROMPT='$(gst_get_status) %F{white}$(gst_get_pwd) $(git_prompt_info)%f '
+  [[ ${+functions[git-info]} ]] && git-info
 }
 
 prompt_gitster_setup() {
-  ZSH_THEME_GIT_PROMPT_PREFIX="%F{cyan}"
-  ZSH_THEME_GIT_PROMPT_SUFFIX="%f"
-  ZSH_THEME_GIT_PROMPT_DIRTY=" %F{yellow}✗%f"
-  ZSH_THEME_GIT_PROMPT_CLEAN=" %F{green}✓%f"
-
+  autoload -Uz colors && colors
   autoload -Uz add-zsh-hook
 
+  prompt_opts=(cr percent subst)
+
   add-zsh-hook precmd prompt_gitster_precmd
-  prompt_opts=(cr subst percent)
+
+  zstyle ':zim:git-info:branch' format '%b'
+  zstyle ':zim:git-info:commit' format '%c'
+  zstyle ':zim:git-info:clean' format '%F{green}✓'
+  zstyle ':zim:git-info:dirty' format '%F{yellow}✗'
+  zstyle ':zim:git-info:keys' format \
+    'prompt' ' %F{cyan}%b%c %C%D'
+
+  PROMPT='$(prompt_gitster_get_status)%F{white}$(prompt_gitster_get_pwd)${(e)git_info[prompt]}%f '
+  RPROMPT=''
 }
 
 prompt_gitster_setup "$@"