Refactor infra git libs and testing.

infra/services/gnumbd/__main__.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import argparse
 import errno
 import logging
 import os
 import sys
 import time
 import urlparse
 
+from infra.libs import git2
+
+from infra.services.gnumbd import gnumbd
+
+
 LOGGER = logging.getLogger(__name__)
 
-from infra.services.gnumbd.inner_loop import (
-    inner_loop, DEFAULT_CONFIG_REF, DEFAULT_REPO_DIR)
-
-from infra.services.gnumbd.support import git, config_ref
+DEFAULT_REPO_DIR = 'gnumbd_repos'
 
 
 def parse_args(args):  # pragma: no cover
   def check_url(s):
     parsed = urlparse.urlparse(s)
     if parsed.scheme not in ('https', 'git', 'file'):
       raise argparse.ArgumentTypeError(
           'Repo URL must use https, git or file protocol.')
     if not parsed.path.strip('/'):
       raise argparse.ArgumentTypeError('URL is missing a path?')
-    return git.Repo(s)
+    return git2.Repo(s)
 
   parser = argparse.ArgumentParser('python -m %s' % __package__)
   g = parser.add_mutually_exclusive_group()
   g.set_defaults(log_level=logging.WARN)
   g.add_argument('--quiet', action='store_const', const=logging.ERROR,
                  dest='log_level', help='Make the output quieter.')
   g.add_argument('--verbose', action='store_const', const=logging.INFO,
                  dest='log_level', help='Make the output louder.')
   g.add_argument('--debug', action='store_const', const=logging.DEBUG,
                  dest='log_level', help='Make the output really loud.')
   parser.add_argument('--dry_run', action='store_true',
                       help='Do not actually push anything.')
-  parser.add_argument('--config_ref', metavar='REF', default=DEFAULT_CONFIG_REF,
-                      help='The config ref to use (default: %(default)s)')
   parser.add_argument('--repo_dir', metavar='DIR', default=DEFAULT_REPO_DIR,
                       help=('The directory to use for git clones '
                             '(default: %(default)s)'))
   parser.add_argument('repo', nargs=1, help='The url of the repo to act on.',
                       type=check_url)
   opts = parser.parse_args(args)
 
   logging.basicConfig(level=opts.log_level)
 
   repo = opts.repo[0]
   repo.dry_run = opts.dry_run
   repo.repos_dir = os.path.abspath(opts.repo_dir)
   try:
     LOGGER.info('making repo dir: %s', repo.repos_dir)
     os.makedirs(repo.repos_dir)
   except OSError as e:
     if e.errno != errno.EEXIST:
       raise
 
-  return repo, config_ref.ConfigRef(git.Ref(repo, opts.config_ref))
+  return repo
 
 
 def main(args):  # pragma: no cover
-  repo, cref = parse_args(args)
+  repo = parse_args(args)
+  cref = gnumbd.GnumbdConfigRef(repo)
   repo.reify()
 
   loop_count = 0
   try:
     while True:
       start = time.time()
       LOGGER.debug('Begin loop %d', loop_count)
 
       print
       try:
-        inner_loop(repo, cref)
+        gnumbd.inner_loop(repo, cref)
       except KeyboardInterrupt:
         raise
       except Exception:
         LOGGER.exception('Uncaught exception in inner_loop')
 
       LOGGER.debug('End loop %d (%f sec)', loop_count, time.time() - start)
 
       # TODO(iannucci): This timeout should be an exponential backon/off.
       #   Whenever we push, we should decrease the interval at 'backon_rate'
       #   until we hit 'min_interval'.
       #   Whenever we fail/NOP, we should back off at 'backoff_rate' until we
       #   hit 'max_interval'.
       #
       #   When all is going well, this should be looping at < 1 sec. If things
       #   start going sideways, we should automatically back off.
       time.sleep(cref['interval'])
       loop_count += 1
   except KeyboardInterrupt:
     LOGGER.warn('Stopping due to KeyboardInterrupt')
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))