[Android] Add lint as a gyp action.

build/android/lint/suppress.py

Index: build/android/lint/suppress.py
diff --git a/build/android/lint/suppress.py b/build/android/lint/suppress.py
new file mode 100755
index 0000000000000000000000000000000000000000..9664ffda6652e42cbc5edc6b6ba51e10f50b67b7
--- /dev/null
+++ b/build/android/lint/suppress.py
@@ -0,0 +1,115 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2013 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.
+
+"""Add all generated lint_result.xml files to suppressions.xml"""
+
+
+import collections
+import optparse
+import os
+import sys
+from xml.dom import minidom
+
+_BUILD_ANDROID_DIR = os.path.join(os.path.dirname(__file__), '..')
+sys.path.append(_BUILD_ANDROID_DIR)
+
+from pylib import constants
+
+
+_THIS_FILE = os.path.abspath(__file__)
+_CONFIG_PATH = os.path.join(os.path.dirname(_THIS_FILE), 'suppressions.xml')
+_DOC = (
+    '\nSTOP! It looks like you want to suppress some lint errors:\n'
+    '- Have you tried identifing the offending patch?\n'
+    '  Ask the author for a fix and/or revert the patch.\n'
+    '- It is preferred to add suppressions in the code instead of\n'
+    '  sweeping it under the rug here. See:\n\n'
+    '    http://developer.android.com/tools/debugging/improving-w-lint.html\n'
+    '\n'
+    'Still reading?\n'
+    '- You can edit this file manually to suppress an issue\n'
+    '  globally if it is not applicable to the project.\n'
+    '- You can also automatically add issues found so for in the\n'
+    '  build process by running:\n\n'
+    '    ' + os.path.relpath(_THIS_FILE, constants.DIR_SOURCE_ROOT) + '\n\n'
+    '  which will generate this file (Comments are not preserved).\n'
+    '  Note: PRODUCT_DIR will be substituted at run-time with actual\n'
+    '  directory path (e.g. out/Debug)\n'
+)
+
+
+_Issue = collections.namedtuple('Issue', ['severity', 'paths'])
+
+
+def _ParseConfigFile(config_path):
+  print 'Parsing %s' % config_path
+  issues_dict = {}
+  dom = minidom.parse(config_path)
+  for issue in dom.getElementsByTagName('issue'):
+    issue_id = issue.attributes['id'].value
+    severity = issue.getAttribute('severity')
+    paths = set(
+        [p.attributes['path'].value for p in
+         issue.getElementsByTagName('ignore')])
+    issues_dict[issue_id] = _Issue(severity, paths)
+  return issues_dict
+
+
+def _ParseAndMergeResultFile(result_path, issues_dict):
+  print 'Parsing and merging %s' % result_path
+  dom = minidom.parse(result_path)
+  for issue in dom.getElementsByTagName('issue'):
+    issue_id = issue.attributes['id'].value
+    severity = issue.attributes['severity'].value
+    path = issue.getElementsByTagName('location')[0].attributes['file'].value
+    if issue_id not in issues_dict:
+      issues_dict[issue_id] = _Issue(severity, set())
+    issues_dict[issue_id].paths.add(path)
+
+
+def _WriteConfigFile(config_path, issues_dict):
+  new_dom = minidom.getDOMImplementation().createDocument(None, 'lint', None)
+  top_element = new_dom.documentElement
+  top_element.appendChild(new_dom.createComment(_DOC))
+  for issue_id in sorted(issues_dict.keys()):
+    severity = issues_dict[issue_id].severity
+    paths = issues_dict[issue_id].paths
+    issue = new_dom.createElement('issue')
+    issue.attributes['id'] = issue_id
+    if severity:
+      issue.attributes['severity'] = severity
+    if severity == 'ignore':
+      print 'Warning: [%s] is suppressed globally.' % issue_id
+    else:
+      for path in sorted(paths):
+        ignore = new_dom.createElement('ignore')
+        ignore.attributes['path'] = path
+        issue.appendChild(ignore)
+    top_element.appendChild(issue)
+
+  with open(config_path, 'w') as f:
+    f.write(new_dom.toprettyxml(indent='  ', encoding='utf-8'))
+  print 'Updated %s' % config_path
+
+
+def _Suppress(config_path, result_path):
+  issues_dict = _ParseConfigFile(config_path)
+  _ParseAndMergeResultFile(result_path, issues_dict)
+  _WriteConfigFile(config_path, issues_dict)
+
+
+def main(argv):
+  parser = optparse.OptionParser(usage='%prog RESULT-FILE')
+  _, args = parser.parse_args()
+
+  if len(args) != 1 or not os.path.exists(args[0]):
+    parser.error('Must provide RESULT-FILE')
+
+  _Suppress(_CONFIG_PATH, args[0])
+
+
+if __name__ == '__main__':
+  main(sys.argv)