git-post-receive

#!/usr/bin/env python3

"""
example post-receive hook, to be placed in the hooks/ folder
of your bare repository.
"""

import os
import tempfile
from distutils.dir_util import copy_tree
from subprocess import run

DESTINATION_DIR = "/srv/http/openage.blog"


def main():
    """
    Check out the repo in a tmpdir,
    generate the content,
    and replace the directory contents in DESTINATION_DIR.
    """

    with tempfile.TemporaryDirectory() as tmpdir:
        # check out the repo contents
        os.environ.update({
            "GIT_WORK_TREE": tmpdir,
        })
        run(['git', 'checkout', '-f'])

        # go to work dir and generate the web content
        os.chdir(tmpdir)

        if not run(['make', 'publish']):
            raise Exception("error generating content")

        # remove the old files
        os.chdir(DESTINATION_DIR)
        run("rm -rf *", shell=True)  # yes, dirty, but a working oneliner.

        # the shutil implementation is totally broken:
        # it requires the destination path to not exist.
        copy_tree(os.path.join(tmpdir, 'output/'), DESTINATION_DIR)


if __name__ == "__main__":
    main()