Merge MB from trunk back to M45.

tools/mb/PRESUBMIT.py

Index: tools/mb/PRESUBMIT.py
diff --git a/tools/mb/PRESUBMIT.py b/tools/mb/PRESUBMIT.py
new file mode 100644
index 0000000000000000000000000000000000000000..838d3c39910554824c4fcb5c1c3102451636526a
--- /dev/null
+++ b/tools/mb/PRESUBMIT.py
@@ -0,0 +1,33 @@
+# 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.
+
+
+def _CommonChecks(input_api, output_api):
+  results = []
+
+  # Run Pylint over the files in the directory.
+  pylint_checks = input_api.canned_checks.GetPylint(input_api, output_api)
+  results.extend(input_api.RunTests(pylint_checks))
+
+  # Run the MB unittests.
+  results.extend(input_api.canned_checks.RunUnitTestsInDirectory(
+      input_api, output_api, '.', [ r'^.+_unittest\.py$']))
+
+  # Validate the format of the mb_config.pyl file.
+  cmd = [input_api.python_executable, 'mb.py', 'validate']
+  kwargs = {'cwd': input_api.PresubmitLocalPath()}
+  results.extend(input_api.RunTests([
+      input_api.Command(name='mb_validate',
+                        cmd=cmd, kwargs=kwargs,
+                        message=output_api.PresubmitError)]))
+
+  return results
+
+
+def CheckChangeOnUpload(input_api, output_api):
+  return _CommonChecks(input_api, output_api)
+
+
+def CheckChangeOnCommit(input_api, output_api):
+  return _CommonChecks(input_api, output_api)