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#!/usr/bin/python
'Launch a Git Daemon on an ephemeral port, and report which port was used.'
import argparse
import contextlib
import pipes
import socket
import subprocess
import sys
# Parse arguments with bare argparse, since cliapp hates unknown options
class UnsupportedArgument(argparse.Action):
def __call__(self, parser, namespace, values, option_string=None):
sys.stderr.write('%s not supported\n' % option_string)
sys.exit(1)
parser = argparse.ArgumentParser(description=__doc__)
for arg in ('user', 'group', 'detach', 'port', 'syslog', 'pid-file'):
parser.add_argument('--' + arg, action=UnsupportedArgument)
parser.add_argument('--listen', default='127.0.0.1')
parser.add_argument('--port-file', required=True,
help='Report which port the git daemon was bound to.')
options, args = parser.parse_known_args()
with contextlib.closing(socket.socket()) as sock:
sock.bind((options.listen, 0))
host, port = sock.getsockname()
with open(options.port_file, 'w') as f:
f.write('%s\n' % port)
sock.listen(1)
while True:
conn, addr = sock.accept()
with contextlib.closing(conn):
gitcmd = ['git', 'daemon', '--inetd']
gitcmd.extend(args)
cmdstr = (' '.join(map(pipes.quote, gitcmd)))
sys.stderr.write('Running %s' % cmdstr)
ret = subprocess.call(args=gitcmd, stdin=conn, stdout=conn,
stderr=conn, close_fds=True)
if ret != 0:
sys.stderr.write('%s exited %d\n' % (cmdstr, ret))
# git-daemon returns 255 when the repo doesn't exist
if ret not in (0, 255):
break
sys.exit(ret)
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