[Findit] Fetch DEPS from buildspec/ instead of trunk for chrome official builds.

appengine/findit/common/chromium_deps.py

Index: appengine/findit/common/chromium_deps.py
diff --git a/appengine/findit/common/chromium_deps.py b/appengine/findit/common/chromium_deps.py
index 970b2df6dce69523948993dca745357711c35c59..3bfaae184808227982f279ce756017e86f4f0eb9 100644
--- a/appengine/findit/common/chromium_deps.py
+++ b/appengine/findit/common/chromium_deps.py
@@ -2,18 +2,34 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-from common import git_repository
-from common import http_client_appengine
+import re
+
 from common import dependency
 from common import deps_parser
+from common import git_repository
+from common import http_client_appengine
 
 
 _CHROMIUM_ROOT_DIR = 'src/'
 _CHROMIUM_REPO_MASTER = 'https://chromium.googlesource.com/chromium/src.git'
 
+_CHROME_VERSION_PATTERN = re.compile(r'^\d+\.\d+\.\d+\.\d+$')
+
+_BUILDSPEC_REPO = ('https://chrome-internal.googlesource.com/chrome/tools/'
+                   'buildspec.git/')
+
+
+def IsChromeVersion(revision):
+  """Determines if a revision is a chrome version."""
+  if _CHROME_VERSION_PATTERN.match(revision):
+    return True
+
+  return False
+
 
 class DEPSDownloader(deps_parser.DEPSLoader):
   """Downloads DEPS from remote Git repo."""
+
   def __init__(self, check_deps_git_first=False):
     """
     Args:
@@ -50,16 +66,26 @@ def GetChromeDependency(revision, platform, check_deps_git_first=False):
   """Returns all dependencies of Chrome as a dict for the given revision and OS.
 
   Args:
-    revision (str): The revision of a Chrome build.
+    revision (str): The revision of a Chrome build, it can be a githash or a
+      chrome version for a official build.
     platform (str): The target platform of the Chrome build, should be one of
-        'win', 'ios', 'mac', 'unix', 'android', or 'all'.
+      'win', 'ios', 'mac', 'unix', 'android', or 'all'.
     check_deps_git_first (bool): If True, use .DEPS.git instead of DEPS.
 
   Returns:
     A map from dependency path to the dependency info.
   """
+  deps_repo_info = {'deps_file': 'DEPS'}
+
+  if IsChromeVersion(revision):
+    # For chrome version, get the DEPS file from internal buildspec/ repo
+    # instead of chromium trunk.
+    deps_repo_info['deps_repo_url'] = _BUILDSPEC_REPO
+    deps_repo_info['deps_repo_revision'] = 'master'
+    deps_repo_info['deps_file'] = 'release/%s/DEPS' % revision
+
   root_dep = dependency.Dependency(
-      _CHROMIUM_ROOT_DIR, _CHROMIUM_REPO_MASTER, revision, 'DEPS')
+      _CHROMIUM_ROOT_DIR, _CHROMIUM_REPO_MASTER, revision, **deps_repo_info)
 
   deps_parser.UpdateDependencyTree(
       root_dep, [platform], DEPSDownloader(check_deps_git_first))
@@ -78,14 +104,21 @@ def GetChromeDependency(revision, platform, check_deps_git_first=False):
 
 
 def GetChromiumDEPSRolls(old_cr_revision, new_cr_revision, platform,
-                         check_deps_git_first=False):
+                         check_deps_git_first=False, skip_chromium_roll=True):
   """Returns a list of dependency rolls between the given Chromium revisions.
 
   Args:
-    old_cr_revision (str): The Git commit hash for the old Chromium revision.
-    new_cr_revision (str): The Git commit hash for the new Chromium revision.
+    old_cr_revision (str): The old Chromium revision, it can be a githash or a
+      chrome version for a official build.
+    new_cr_revision (str): The new Chromium revision, it can be a githash or a
+      chrome version for a official build.
     platform (str): The target OS platform of the Chrome or test binary.
     check_deps_git_first (bool): If True, use .DEPS.git instead of DEPS.
+    skip_chromium_roll (bool): If False, chromium roll will be contained in
+      the return.
+
+  Returns:
+    A list of DependencyRoll objects in the revision range.
   """
   old_deps = GetChromeDependency(
       old_cr_revision, platform, check_deps_git_first)
@@ -95,7 +128,7 @@ def GetChromiumDEPSRolls(old_cr_revision, new_cr_revision, platform,
   rolls = []
 
   for path, new_dep in new_deps.iteritems():
-    if path == _CHROMIUM_ROOT_DIR:  # Skip the root dependency -- chromium.
+    if skip_chromium_roll and path == _CHROMIUM_ROOT_DIR:
       continue
 
     old_revision = None
@@ -117,22 +150,20 @@ def GetChromiumDEPSRolls(old_cr_revision, new_cr_revision, platform,
 
 
 def GetDEPSRollsDict(old_cr_revision, new_cr_revision, platform):
-  """Gets dep_path to DependencyRoll dictionary for deps in
-  (old_cr_revision, new_cr_revision].
+  """Gets dep_path to DependencyRoll dictionary for deps between revisions.
 
   Args:
-    old_cr_revision (str): The Git commit hash for the old Chromium revision.
-    new_cr_revision (str): The Git commit hash for the new Chromium revision.
+    old_cr_revision (str): The old Chromium revision, it can be a githash or a
+      chrome version for a official build.
+    new_cr_revision (str): The new Chromium revision, it can be a githash or a
+      chrome version for a official build.
     platform (str): The target OS platform of the Chrome or test binary.
 
   Returns:
-    A dict, mapping dep path to DependencyRoll.
+    A dict, mapping dep path to its DependencyRoll.
   """
-  deps_rolls = GetChromiumDEPSRolls(old_cr_revision, new_cr_revision, platform)
-  # Add chromium as dependency roll.
-  deps_rolls.append(dependency.DependencyRoll(
-      _CHROMIUM_ROOT_DIR, _CHROMIUM_REPO_MASTER,
-      old_cr_revision, new_cr_revision))
+  deps_rolls = GetChromiumDEPSRolls(old_cr_revision, new_cr_revision, platform,
+                                    skip_chromium_roll=False)
 
   deps_rolls_dict = {}
   for dep_roll in deps_rolls: