git hook for particular branch

githook.py

#!/usr/bin/env python3
import time
import sys
import fileinput
import os.path
import time
import json


def log(*args, **kwargs):
    format = '%H:%M:%S'
    value = time.localtime(int(time.time()))
    dt = time.strftime(format, value)
    
    print(dt, *args, **kwargs)
    
    filename = '{}.log'.format(__file__)
    
    with open(filename, 'a', encoding='utf-8') as f:
        print(dt, *args, file=f, **kwargs)

def process_branch(branch):
    expect = 'branch_name'
    if expect in branch:
        log('found correct branch', branch)


def main():
    log('argv', sys.argv)
    for line in fileinput.input():
        log('line', line)
        parts = line.split()
        branch = parts[2]
        process_branch(branch)


if __name__ == '__main__':
    print('begin post receive')
    main()

change expect to branch
and
filename to log file

link to /git/*.git/hooks/post-receive