[Android] Add a presubmit for devil/.

BUG=476719

Review URL: https://codereview.chromium.org/1517243003

Cr-Original-Commit-Position: refs/heads/master@{#365107}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: a83d25fbaac0f8a92538a79af87bdedc0f888233

android/PRESUBMIT.py

@@ -27,8 +27,8 @@ def CommonChecks(input_api, output_api):
       input_api,
       output_api,
       pylintrc='pylintrc',
-      # symbols has its own PRESUBMIT.py
-      black_list=build_pys + [r'pylib/symbols/.*\.py$'],
+      # devil and symbols have their own PRESUBMIT.py
+      black_list=build_pys + [r'devil/.*\.py$', r'pylib/symbols/.*\.py$'],
       extra_paths_list=[J(), J('buildbot')]))
   output.extend(input_api.canned_checks.RunPylint(
       input_api,
@@ -60,26 +60,6 @@ def CommonChecks(input_api, output_api):
       ],
       env=pylib_test_env))
 
-
-  devil_test_env = dict(pylib_test_env)
-  devil_test_env.update({
-      'DEVIL_ENV_CONFIG':
-          input_api.os_path.join(build_android_dir, 'devil_chromium.json')
-  })
-  output.extend(input_api.canned_checks.RunUnitTests(
-      input_api,
-      output_api,
-      unit_tests=[
-          J('devil', 'devil_env_test.py'),
-          J('devil', 'android', 'battery_utils_test.py'),
-          J('devil', 'android', 'device_utils_test.py'),
-          J('devil', 'android', 'fastboot_utils_test.py'),
-          J('devil', 'android', 'md5sum_test.py'),
-          J('devil', 'android', 'logcat_monitor_test.py'),
-          J('devil', 'utils', 'cmd_helper_test.py'),
-          J('devil', 'utils', 'timeout_retry_unittest.py'),
-      ],
-      env=devil_test_env))
   return output
 
 

android/devil/PRESUBMIT.py

@@ -0,0 +1,87 @@
+# 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.
+
+"""Presubmit script for devil.
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts for
+details on the presubmit API built into depot_tools.
+"""
+
+
+def _RunPylint(input_api, output_api):
+  return input_api.canned_checks.RunPylint(
+      input_api,
+      output_api,
+      pylintrc='pylintrc',
+      extra_paths_list=[
+          input_api.os_path.join(input_api.PresubmitLocalPath(), '..'),
+      ])
+
+
+def _RunUnitTests(input_api, output_api):
+  def J(*dirs):
+    """Returns a path relative to presubmit directory."""
+    return input_api.os_path.join(input_api.PresubmitLocalPath(), *dirs)
+
+  test_env = dict(input_api.environ)
+  test_env.update({
+    'PYTHONDONTWRITEBYTECODE': '1',
+    'PYTHONPATH': ':'.join([J(), J('..')]),
+  })
+
+  return input_api.canned_checks.RunUnitTests(
+      input_api,
+      output_api,
+      unit_tests=[
+          J('devil_env_test.py'),
+          J('android', 'battery_utils_test.py'),
+          J('android', 'device_utils_test.py'),
+          J('android', 'fastboot_utils_test.py'),
+          J('android', 'md5sum_test.py'),
+          J('android', 'logcat_monitor_test.py'),
+          J('utils', 'cmd_helper_test.py'),
+          J('utils', 'timeout_retry_unittest.py'),
+      ],
+      env=test_env)
+
+
+def _EnsureNoPylibUse(input_api, output_api):
+  def other_python_files(f):
+    this_presubmit_file = input_api.os_path.join(
+        input_api.PresubmitLocalPath(), 'PRESUBMIT.py')
+    return (f.LocalPath().endswith('.py')
+            and not f.AbsoluteLocalPath() == this_presubmit_file)
+
+  changed_files = input_api.AffectedSourceFiles(other_python_files)
+  import_error_re = input_api.re.compile(
+      r'(from pylib.* import)|(import pylib)')
+
+  errors = []
+  for f in changed_files:
+    errors.extend(
+        '%s:%d' % (f.LocalPath(), line_number)
+        for line_number, line_text in f.ChangedContents()
+        if import_error_re.search(line_text))
+
+  if errors:
+    return [output_api.PresubmitError(
+        'pylib modules should not be imported from devil modules.',
+        items=errors)]
+  return []
+
+
+def CommonChecks(input_api, output_api):
+  output = []
+  output += _RunPylint(input_api, output_api)
+  output += _RunUnitTests(input_api, output_api)
+  output += _EnsureNoPylibUse(input_api, output_api)
+  return output
+
+
+def CheckChangeOnUpload(input_api, output_api):
+  return CommonChecks(input_api, output_api)
+
+
+def CheckChangeOnCommit(input_api, output_api):
+  return CommonChecks(input_api, output_api)

android/devil/pylintrc

@@ -0,0 +1,15 @@
+[FORMAT]
+
+max-line-length=80
+
+[MESSAGES CONTROL]
+
+disable=abstract-class-not-used,bad-continuation,bad-indentation,duplicate-code,fixme,invalid-name,locally-disabled,locally-enabled,missing-docstring,star-args,too-few-public-methods,too-many-arguments,too-many-branches,too-many-instance-attributes,too-many-lines,too-many-locals,too-many-public-methods,too-many-statements,
+
+[REPORTS]
+
+reports=no
+
+[VARIABLES]
+
+dummy-variables-rgx=^_.*$|dummy