Writing Git hooks in python/bash scripts [closed]

Question

I have recently needed to write git hooks, for all commits to reference a particular ticket.

I was hoping for a place to start learning. All the stuff in the pro git book is written in Ruby. Since Ruby is not my strong suit, can anybody share tutorials about git hooks written in other languages? (I'd particularly prefer Python or Bash scripts.)

Answer 1

Here is an example of using Python for a hook. In general the hooks are language agnostic. You use the script to do some work or to exit with a 0/other return code to alter the flow of a git process.

Answer 2

The examples that come with git are written in shell script; there are some basic ones in .git/hooks of each repo and more advanced ones installed to /usr/share/doc/git-core/contrib/hooks.

There's also more info on the various hooks available via $ man githooks.

Answer 3

I found out that it's easy to write git hook on python. It's an example of post-receive hook on python. Provided example deploys master and develop branches in different folders (changes in master will be pushed to production website and changes in develop branch will be pushed to qa site)

#!/usr/bin/env python                                                                    
# -*- coding: UTF-8 -*-                                                                  
#post-receive                                                                            

import sys                                                                               
import subprocess                                                                        

# 1. Read STDIN (Format: "from_commit to_commit branch_name")                            
(old, new, branch) = sys.stdin.read().split()                                            

# 2. Only deploy if master branch was pushed                                             
if branch == 'refs/heads/master':                                                        
    subprocess.call('date >> ~/prod-deployment.log', shell=True)                         
    subprocess.call('GIT_WORK_TREE=/home/ft/app.prod git checkout master -f', shell=True)
    subprocess.call('cd ../../app.prod;bower update', shell=True)                        

#3. Only deploy if develop branch was pushed                                             
if branch == 'refs/heads/develop':                                                       
    subprocess.call('date >> ~/dev-deployment.log', shell=True)                          
    subprocess.call('GIT_WORK_TREE=/home/ft/app.dev git checkout develop -f', shell=True)
    subprocess.call('cd ../../app.dev;bower update', shell=True)