Sacha Chua - category - git Emacs, sketches, and life https://sachachua.com/blog/category/git/feed/atom/index.xml 11ty 2024-10-23T12:53:44Z A git post-commit hook for tagging my subed.el release version 2024-12-09T17:47:35Z 2024-10-23T12:53:44Z https://sachachua.com/blog/2024/10/a-git-post-commit-hook-for-tagging-my-subed-el-release-version/

[2024-12-09 Mon]: It looks like I also need to use P t to push the tags from Magit, or call git push --tags from the command-line. Since I'm using a postcommit hook, I'm not sure followTags will kick in for that. Hmm…

Debian uses Git repository tags to notice when to update packages. I kept forgetting to tag subed's versions, so now I made a git post-commit hook which I think will do the trick. I based it on https://gist.github.com/ajmirsky/1245103, just updated for Python 3 and tweaked to work with how I do versions in subed.el. I've also added it to my README.org. 

#!/usr/bin/python

# place in .git/hooks/post-commit
# Based on https://gist.github.com/ajmirsky/1245103

import subprocess
import re

print("checking for version change...",)

output = subprocess.check_output(['git', 'diff', 'HEAD^', 'HEAD', '-U0']).decode("utf-8")

version_info = None
for d in output.split("\n"):
    rg = re.compile(r'\+(?:;;\s+)?Version:\s+(?P<major>[0-9]+)\.(?P<minor>[0-9]+)\.(?P<rev>[0-9]+)')
    m = rg.search(d)
    if m:
        version_info = m.groupdict()
        break

if version_info:
    tag = "v%s.%s.%s" % (version_info['major'], version_info['minor'], version_info['rev'])
    existing = subprocess.check_output(['git', 'tag']).decode("utf-8").split("\n")
    if tag in existing:
        print("%s is already tagged, not updating" % tag)
    else:
        result = subprocess.run(['git', 'tag', '-f', tag])
        if result.returncode:
            raise Exception('tagging not successful: %s %s' % (result.stdout, result.returncode))
        print("tagged revision: %s" % tag)
else:
    print("none found.")

You can e-mail me at sacha@sachachua.com.

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