Also print comments found in files during presubmit owners suggestion

R=dpranke@chromium.org
BUG=694222

Change-Id: I5676db2283dd43378293bc9bb32f71e0a1225806
Reviewed-on: https://chromium-review.googlesource.com/471609Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>

presubmit_canned_checks.py

@@ -903,9 +903,20 @@ def CheckOwners(input_api, output_api, source_file_filter=None):
                   (needed, '\n    '.join(sorted(missing_files))))]
     if not input_api.is_committing:
       suggested_owners = owners_db.reviewers_for(missing_files, owner_email)
+      finder = input_api.owners_finder(missing_files,
+                                       input_api.change.RepositoryRoot(),
+                                       owner_email,
+                                       fopen=file, os_path=input_api.os_path,
+                                       email_postfix='', disable_color=True)
+      owners_with_comments = []
+      def RecordComments(text):
+        owners_with_comments.append(finder.print_indent() + text)
+      finder.writeln = RecordComments
+      for owner in suggested_owners:
+        finder.print_comments(owner)
       output_list.append(output_fn('Suggested OWNERS: ' +
           '(Use "git-cl owners" to interactively select owners.)\n    %s' %
-          ('\n    '.join(suggested_owners or []))))
+          ('\n    '.join(owners_with_comments))))
     return output_list
 
   if input_api.is_committing and not reviewers:

presubmit_support.py

@@ -45,6 +45,7 @@ import fix_encoding
 import gclient_utils
 import gerrit_util
 import owners
+import owners_finder
 import presubmit_canned_checks
 import rietveld
 import scm
@@ -423,6 +424,7 @@ class InputApi(object):
     # in order to be able to handle wildcard OWNERS files?
     self.owners_db = owners.Database(change.RepositoryRoot(),
                                      fopen=file, os_path=self.os_path)
+    self.owners_finder = owners_finder.OwnersFinder
     self.verbose = verbose
     self.Command = CommandData
 

tests/presubmit_unittest.py

@@ -23,6 +23,7 @@ sys.path.insert(0, _ROOT)
 from testing_support.super_mox import mox, SuperMoxTestBase
 
 import owners
+import owners_finder
 import subprocess2 as subprocess
 import presubmit_support as presubmit
 import rietveld
@@ -163,8 +164,8 @@ class PresubmitUnittest(PresubmitTestsBase):
       'auth', 'cPickle', 'cpplint', 'cStringIO',
       'contextlib', 'canned_check_filter', 'fix_encoding', 'fnmatch',
       'gclient_utils', 'glob', 'inspect', 'json', 'load_files', 'logging',
-      'marshal', 'normpath', 'optparse', 'os', 'owners', 'pickle',
-      'presubmit_canned_checks', 'random', 're', 'rietveld', 'scm',
+      'marshal', 'normpath', 'optparse', 'os', 'owners', 'owners_finder',
+      'pickle', 'presubmit_canned_checks', 'random', 're', 'rietveld', 'scm',
       'subprocess', 'sys', 'tempfile', 'time', 'traceback', 'types', 'unittest',
       'urllib2', 'warn', 'multiprocessing', 'DoGetTryMasters',
       'GetTryMastersExecuter', 'itertools', 'urlparse', 'gerrit_util',
@@ -996,6 +997,7 @@ class InputApiUnittest(PresubmitTestsBase):
         'os_path',
         'os_stat',
         'owners_db',
+        'owners_finder',
         'pickle',
         'platform',
         'python_executable',
@@ -2250,6 +2252,7 @@ class CannedChecksUnittest(PresubmitTestsBase):
     change.author_email = 'john@example.com'
     change.R = ','.join(manually_specified_reviewers)
     change.TBR = ''
+    change.RepositoryRoot = lambda: None
     affected_file = self.mox.CreateMock(presubmit.GitAffectedFile)
     input_api = self.MockInputApi(change, False)
     if gerrit_response:
@@ -2260,6 +2263,12 @@ class CannedChecksUnittest(PresubmitTestsBase):
     fake_db = self.mox.CreateMock(owners.Database)
     fake_db.email_regexp = input_api.re.compile(owners.BASIC_EMAIL_REGEXP)
     input_api.owners_db = fake_db
+
+    fake_finder = self.mox.CreateMock(owners_finder.OwnersFinder)
+    fake_finder.print_indent = lambda: ''
+    # pylint: disable=unnecessary-lambda
+    fake_finder.print_comments = lambda owner: fake_finder.writeln(owner)
+    input_api.owners_finder = lambda *args, **kwargs: fake_finder
     input_api.is_committing = is_committing
     input_api.tbr = tbr
     input_api.dry_run = dry_run