[Findit] Factoring the gitiles (etc) stuff out into its own directory

appengine/findit/waterfall/extract_deps_info_pipeline.py

 # Copyright 2015 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 logging
 
 from common import chrome_dependency_fetcher
-from common import git_repository
 from common.http_client_appengine import HttpClientAppengine
 from common.pipeline_wrapper import BasePipeline
+from lib.gitiles import gitiles_repository
 
 
 def _GetOSPlatformName(master_name, builder_name):  # pragma: no cover
   """Returns the OS platform name based on the master and builder."""
   # TODO: make buildbot yield OS platform name as a build property and use it.
   # The code below is just a workaround.
   builder_name = builder_name.lower()
   if master_name == 'chromium.win':
     return 'win'
   elif master_name == 'chromium.linux':
@@ skipping 19 matching lines @@
 
     logging.warn('Failed to detect the OS platform of builder "%s".',
                  builder_name)
     return 'all'  # Default to all platform.
 
 
 def _GetDependencies(chromium_revision, os_platform):
   """Returns the dependencies used by the specified chromium revision."""
   deps = {}
   dep_fetcher=chrome_dependency_fetcher.ChromeDependencyFetcher(
-      git_repository.GitRepository(http_client=HttpClientAppengine()))
+      gitiles_repository.GitilesRepository(http_client=HttpClientAppengine()))
   for path, dependency in dep_fetcher.GetDependency(
       chromium_revision, os_platform).iteritems():
     deps[path] = {
         'repo_url': dependency.repo_url,
         'revision': dependency.revision,
     }
 
   return deps
 
 
@@ skipping 13 matching lines @@
           'new_revision': 'git_hash1',
           'old_revision': 'git_hash2',
         },
         ...
       ],
       ...
     }
   """
   deps_rolls = {}
   dep_fetcher=chrome_dependency_fetcher.ChromeDependencyFetcher(
-      git_repository.GitRepository(http_client=HttpClientAppengine()))
+      gitiles_repository.GitilesRepository(http_client=HttpClientAppengine()))
   for revision, change_log in change_logs.iteritems():
     # Check DEPS roll only if the chromium DEPS file is changed by the CL.
     for touched_file in change_log['touched_files']:
       if touched_file['new_path'] == 'DEPS':
         # In git, r^ refers to the previous revision of r.
         old_revision = '%s^' % revision
         rolls = dep_fetcher.GetDependencyRolls(
             old_revision, revision, os_platform)
         deps_rolls[revision] = [roll.ToDict() for roll in rolls]
         break
@@ skipping 40 matching lines @@
       return {'deps': {}, 'deps_rolls': {}}
 
     chromium_revision = failure_info['chromium_revision']
     os_platform = _GetOSPlatformName(
         failure_info['master_name'], failure_info['builder_name'])
 
     return {
         'deps': _GetDependencies(chromium_revision, os_platform),
         'deps_rolls': _DetectDependencyRolls(change_logs, os_platform)
     }