gitmirror.py

"""
Clones a list of repositories from git.local.lan and pushes it
into a (from the outside) "read-only" branch on weluse.de.
"""

import subprocess
import tempfile
import os
import shutil

# A list of tuples. First is the source, second the destination.
REPOSITORIES = [
    ('git@git.local.lan:yoosello/mainline.git',
     'gitosis@weluse.de:yoosello_upstream.git'),
    ('git@git.local.lan:medimops/welmopter.git',
     'gitosis@weluse.de:welmopter_upstream.git'),
    ('git@git.local.lan:medimops/verteilermops.git',
     'gitosis@weluse.de:verteilermops_upstream.git'),
]

def call(cmd):
    ret = subprocess.call(cmd.split(' '))
    if ret != 0:
        raise Exception("Running command {0} failed!".format(cmd))


def push(repo, destination):
    os.chdir(repo)
    call("git remote add --mirror upstream {0}".format(destination))
    call("git push upstream --mirror")


def run():
    cwd = os.getcwd()
    for source, destination in REPOSITORIES:
        # Go back to our original dir
        os.chdir(cwd)
        # Create a temporary directory
        tmpdir = tempfile.mkdtemp('gitclone')
	print("Starting to backup {0}.".format(source))
	try:
            call("git clone {0} {1}".format(source, tmpdir))
	except KeyboardInterrupt:
            raise
	except:
            # An error in this place is usually an unresponsive host or an
            # access deny.
            # TODO: Send a notification mail.
            continue
        try:
            push(tmpdir, destination)
            print("Backup of {0} successful.".format(source))
        finally:
            shutil.rmtree(tmpdir)


if __name__ == '__main__':
    run()