From e1aeba7be6611cb6c74a32aacd170cfbad797328 Mon Sep 17 00:00:00 2001
From: Danil Kutkevich <danil@kutkevich.org>
Date: Tue, 1 Oct 2013 17:40:56 +0400
Subject: [PATCH] Added callback function to tweak prompt dynamicly

---
 README.md    | 24 +++++++++++++++++++-----
 gitprompt.sh | 15 ++++++++++++---
 2 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index 8c8e7f3..a2de364 100644
--- a/README.md
+++ b/README.md
@@ -43,11 +43,25 @@ The symbols are as follows:
 
 ## Install
 
-1. Clone this repository to your homedir e.g. ``git clone https://github.com/magicmonty/bash-git-prompt.git .bash-git-prompt``
-1. configure your prompt and source the file ``gitprompt.sh`` from your ``~/.bashrc`` config file
-  * you can use ``GIT_PROMPT_START`` and ``GIT_PROMPT_END`` to tweak your prompt
-  * If you want to tweak the colors, currently you have to tweak it in the ``gitprompt.sh`` 
-1. Go in a git repository and test it!
+1. Clone this repository to your homedir
+   e.g. ``git clone https://github.com/magicmonty/bash-git-prompt.git .bash-git-prompt``
+2. Source the file ``gitprompt.sh`` from your ``~/.bashrc`` config file
+3. Go in a git repository and test it!
+
+## Configuration
+
+1. You can use ``GIT_PROMPT_START`` and ``GIT_PROMPT_END`` to tweak your prompt
+2. If you want to tweak the colors,
+   currently you have to tweak it in the ``gitprompt.sh``
+3. You can define ``prompt_callback`` function to tweak your prompt dynamicly
+
+```sh
+function prompt_callback {
+    if [ `jobs | wc -l` -ne 0 ]; then
+        echo -n " jobs:\j"
+    fi
+}
+```
 
 **Enjoy!**
 
diff --git a/gitprompt.sh b/gitprompt.sh
index 945bc9e..e9bdeb6 100644
--- a/gitprompt.sh
+++ b/gitprompt.sh
@@ -73,7 +73,7 @@ function git_prompt_config()
     PROMPT_END="${GIT_PROMPT_END}"
   fi
 
-  EMPTY_PROMPT="${PROMPT_START}${PROMPT_END}"
+  EMPTY_PROMPT="${PROMPT_START}$($prompt_callback)${PROMPT_END}"
 
   # fetch remote revisions every other $GIT_PROMPT_FETCH_TIMEOUT (default 5) minutes
   GIT_PROMPT_FETCH_TIMEOUT=${1-5}
@@ -182,7 +182,7 @@ function updatePrompt() {
     STATUS="${STATUS}${ResetColor}${GIT_PROMPT_SUFFIX}"
 
 
-    PS1="${PROMPT_START}${STATUS}${PROMPT_END}"
+    PS1="${PROMPT_START}$($prompt_callback)${STATUS}${PROMPT_END}"
     if [[ -n "${VIRTUAL_ENV}" ]]; then
       PS1="${Blue}($(basename "${VIRTUAL_ENV}"))${ResetColor} ${PS1}"
     fi
@@ -192,6 +192,16 @@ function updatePrompt() {
   fi
 }
 
+function prompt_callback_default {
+    return
+}
+
+if [ "`type -t prompt_callback`" = 'function' ]; then
+    prompt_callback="prompt_callback"
+else
+    prompt_callback="prompt_callback_default"
+fi
+
 if [ -z "$OLD_GITPROMPT" ]; then
   OLD_GITPROMPT=$PS1
 fi
@@ -203,4 +213,3 @@ else
   PROMPT_COMMAND=${PROMPT_COMMAND%\;}; # remove trailing semi-colon
   PROMPT_COMMAND="$PROMPT_COMMAND;setGitPrompt"
 fi
-