Windows git prepare-commit-msg hook starting python script

commit-hooks-windows-guide.txt

//be sure your hook folder is correct
//`git config core.hooksPath`
//or set it `git config core.hooksPath .git/hooks`

//be sure the sh.exe exists and it's correct

//file:prepare-commit-msg
#!C:/Program\ Files/Git/usr/bin/sh.exe
python ".git/hooks/prepare-commit-msg.py" "$1"
exit 0
//endfile:prepare-commit-msg

//script takes for example branch name `task/TKT-123_abc_deef` -> changes 'commit message' to  'TKT-123: commit message'
//file:prepare-commit-msg.py
import sys
import subprocess
import re

# Ignore if it's not a simple commit: rebase, merge and so on
# We only need to apply this hook when "git commit" command was performed
if len(sys.argv) != 2:
    exit()

path = sys.argv[1]

with open(path, "r") as file:
    lines = file.readlines()

    if len(lines) == 0:
        exit()

    branch_name = subprocess.check_output(['git', 'rev-parse', '--abbrev-ref', 'HEAD']).decode()

    branch_name_parts = branch_name.split("/")
    if len(branch_name_parts) != 2:
        exit()
    
    re_result = re.search(".*-\d+", branch_name_parts[1])
    if re_result is None:
        exit()

    jira_id = re_result.group(0)
    lines[0] = "{0}: {1}\n".format(jira_id, lines[0])

with open(path, "w") as file:
    file.writelines(lines)
//endfile:prepare-commit-msg.py