[impl/memory] Enforce named tasks during txn.

PRESUBMIT.py

 # Copyright 2015 The LUCI Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
 """Top-level presubmit script.
 
 See https://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts for
 details on the presubmit API built into depot_tools.
 """
 
 import os
+import re
 import sys
 
 
 def PreCommitGo(input_api, output_api, pcg_mode):
   """Run go-specific checks via pre-commit-go (pcg) if it's in PATH."""
   if input_api.is_committing:
     error_type = output_api.PresubmitError
   else:
     error_type = output_api.PresubmitPromptWarning
 
@@ skipping 19 matching lines @@
     cmd.extend(['-r', 'HEAD~1'])
   return input_api.RunTests([
     input_api.Command(
       name='pre-commit-go: %s' % ', '.join(pcg_mode),
       cmd=cmd,
       kwargs={},
       message=error_type),
   ])
 
 
+COPYRIGHT_TEMPLATE = """
+Copyright YEARPATTERN The LUCI Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+""".strip()
+
 def header(input_api):
   """Returns the expected license header regexp for this project."""
   current_year = int(input_api.time.strftime('%Y'))
   allowed_years = (str(s) for s in reversed(xrange(2011, current_year + 1)))
   years_re = '(' + '|'.join(allowed_years) + ')'
-  license_header = (
-    r'.*? Copyright %(year)s The LUCI Authors\. '
-      r'All rights reserved\.\n'
-    r'.*? Use of this source code is governed under the Apache License, '
-      r'Version 2\.0\n'
-    r'.*? that can be found in the LICENSE file\.(?: \*/)?\n'
-  ) % {
-    'year': years_re,
-  }
-  return license_header
+  lines = [
+    ('.*? ' + re.escape(line)) if line else '.*?'
+    for line in COPYRIGHT_TEMPLATE.splitlines()
+  ]
+  lines[0] = lines[0].replace('YEARPATTERN', years_re)
+  return '\n'.join(lines) + '(?: \*/)?\n'
 
 
 def source_file_filter(input_api):
   """Returns filter that selects source code files only."""
   bl = list(input_api.DEFAULT_BLACK_LIST) + [
     r'.+\.pb\.go$',
     r'.+_string\.go$',
   ]
   wl = list(input_api.DEFAULT_WHITE_LIST) + [
     r'.+\.go$',
@@ skipping 24 matching lines @@
   results = CommonChecks(input_api, output_api)
   results.extend(input_api.canned_checks.CheckChangeHasDescription(
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckDoNotSubmitInDescription(
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckDoNotSubmitInFiles(
       input_api, output_api))
   results.extend(PreCommitGo(
       input_api, output_api, ['lint', 'pre-commit', 'pre-push']))
   return results