[Android] Run lint using a cache in the output directory.

build/android/gyp/lint.py

Index: build/android/gyp/lint.py
diff --git a/build/android/gyp/lint.py b/build/android/gyp/lint.py
index bc761ff364a57cc5e83edf7e0c95f51195c2ea5b..2d3c79bfcb0c3c1aeeb1cb2b8ce697290228d6ee 100755
--- a/build/android/gyp/lint.py
+++ b/build/android/gyp/lint.py
@@ -7,7 +7,7 @@
 """Runs Android's lint tool."""
 
 
-import optparse
+import argparse
 import os
 import sys
 import traceback
@@ -22,7 +22,8 @@ _SRC_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__),
 
 def _OnStaleMd5(changes, lint_path, config_path, processed_config_path,
                 manifest_path, result_path, product_dir, sources, jar_path,
-                resource_dir=None, can_fail_build=False):
+                cache_dir, resource_dir=None, can_fail_build=False,
+                silent=False):
 
   def _RelativizePath(path):
     """Returns relative path to top-level src dir.
@@ -33,6 +34,8 @@ def _OnStaleMd5(changes, lint_path, config_path, processed_config_path,
     return os.path.relpath(os.path.abspath(path), _SRC_ROOT)
 
   def _ProcessConfigFile():
+    if not config_path or not processed_config_path:
+      return
     if not build_utils.IsTimeStale(processed_config_path, [config_path]):
       return
 
@@ -54,23 +57,24 @@ def _OnStaleMd5(changes, lint_path, config_path, processed_config_path,
   def _ParseAndShowResultFile():
     dom = minidom.parse(result_path)
     issues = dom.getElementsByTagName('issue')
-    print >> sys.stderr
-    for issue in issues:
-      issue_id = issue.attributes['id'].value
-      message = issue.attributes['message'].value
-      location_elem = issue.getElementsByTagName('location')[0]
-      path = location_elem.attributes['file'].value
-      line = location_elem.getAttribute('line')
-      if line:
-        error = '%s:%s %s: %s [warning]' % (path, line, message, issue_id)
-      else:
-        # Issues in class files don't have a line number.
-        error = '%s %s: %s [warning]' % (path, message, issue_id)
-      print >> sys.stderr, error.encode('utf-8')
-      for attr in ['errorLine1', 'errorLine2']:
-        error_line = issue.getAttribute(attr)
-        if error_line:
-          print >> sys.stderr, error_line.encode('utf-8')
+    if not silent:
+      print >> sys.stderr
+      for issue in issues:
+        issue_id = issue.attributes['id'].value
+        message = issue.attributes['message'].value
+        location_elem = issue.getElementsByTagName('location')[0]
+        path = location_elem.attributes['file'].value
+        line = location_elem.getAttribute('line')
+        if line:
+          error = '%s:%s %s: %s [warning]' % (path, line, message, issue_id)
+        else:
+          # Issues in class files don't have a line number.
+          error = '%s %s: %s [warning]' % (path, message, issue_id)
+        print >> sys.stderr, error.encode('utf-8')
+        for attr in ['errorLine1', 'errorLine2']:
+          error_line = issue.getAttribute(attr)
+          if error_line:
+            print >> sys.stderr, error_line.encode('utf-8')
     return len(issues)
 
   # Need to include all sources when a resource_dir is set so that resources are
@@ -84,10 +88,12 @@ def _OnStaleMd5(changes, lint_path, config_path, processed_config_path,
 
     cmd = [
         _RelativizePath(lint_path), '-Werror', '--exitcode', '--showall',
-        '--config', _RelativizePath(processed_config_path),
-        '--classpath', _RelativizePath(jar_path),
         '--xml', _RelativizePath(result_path),
     ]
+    if jar_path:
+      cmd.extend(['--classpath', _RelativizePath(jar_path)])
+    if processed_config_path:
+      cmd.extend(['--config', _RelativizePath(processed_config_path)])
     if resource_dir:
       cmd.extend(['--resources', _RelativizePath(resource_dir)])
 
@@ -117,13 +123,18 @@ def _OnStaleMd5(changes, lint_path, config_path, processed_config_path,
         src_dir = NewSourceDir()
       os.symlink(os.path.abspath(src), PathInDir(src_dir, src))
 
-    cmd.append(_RelativizePath(os.path.join(manifest_path, os.pardir)))
+    if manifest_path:
+      cmd.append(_RelativizePath(os.path.join(manifest_path, os.pardir)))
 
     if os.path.exists(result_path):
       os.remove(result_path)
 
+    env = {}
+    if cache_dir:
+      env['_JAVA_OPTIONS'] = '-Duser.home=%s' % _RelativizePath(cache_dir)
+
     try:
-      build_utils.CheckOutput(cmd, cwd=_SRC_ROOT)
+      build_utils.CheckOutput(cmd, cwd=_SRC_ROOT, env=env or None)
     except build_utils.CalledProcessError:
       if can_fail_build:
         traceback.print_exc()
@@ -137,92 +148,129 @@ def _OnStaleMd5(changes, lint_path, config_path, processed_config_path,
         try:
           num_issues = _ParseAndShowResultFile()
         except Exception: # pylint: disable=broad-except
-          print 'Lint created unparseable xml file...'
-          print 'File contents:'
-          with open(result_path) as f:
-            print f.read()
+          if not silent:
+            print 'Lint created unparseable xml file...'
+            print 'File contents:'
+            with open(result_path) as f:
+              print f.read()
           raise
 
         _ProcessResultFile()
         msg = ('\nLint found %d new issues.\n'
-               ' - For full explanation refer to %s\n'
-               ' - Wanna suppress these issues?\n'
-               '    1. Read comment in %s\n'
-               '    2. Run "python %s %s"\n' %
+               ' - For full explanation refer to %s\n' %
                (num_issues,
-                _RelativizePath(result_path),
-                _RelativizePath(config_path),
-                _RelativizePath(os.path.join(_SRC_ROOT, 'build', 'android',
-                                             'lint', 'suppress.py')),
                 _RelativizePath(result_path)))
-        print >> sys.stderr, msg
+        if config_path:
+          msg += (' - Wanna suppress these issues?\n'
+                  '    1. Read comment in %s\n'
+                  '    2. Run "python %s %s"\n' %
+                  (_RelativizePath(config_path),
+                   _RelativizePath(os.path.join(_SRC_ROOT, 'build', 'android',
+                                                'lint', 'suppress.py')),
+                   _RelativizePath(result_path)))
+        if not silent:
+          print >> sys.stderr, msg
         if can_fail_build:
           raise Exception('Lint failed.')
 
 
 def main():
-  parser = optparse.OptionParser()
+  parser = argparse.ArgumentParser()
   build_utils.AddDepfileOption(parser)
-  parser.add_option('--lint-path', help='Path to lint executable.')
-  parser.add_option('--config-path', help='Path to lint suppressions file.')
-  parser.add_option('--processed-config-path',
-                    help='Path to processed lint suppressions file.')
-  parser.add_option('--manifest-path', help='Path to AndroidManifest.xml')
-  parser.add_option('--result-path', help='Path to XML lint result file.')
-  parser.add_option('--product-dir', help='Path to product dir.')
-  parser.add_option('--src-dirs', help='Directories containing java files.')
-  parser.add_option('--java-files', help='Paths to java files.')
-  parser.add_option('--jar-path', help='Jar file containing class files.')
-  parser.add_option('--resource-dir', help='Path to resource dir.')
-  parser.add_option('--can-fail-build', action='store_true',
-                    help='If set, script will exit with nonzero exit status'
-                    ' if lint errors are present')
-  parser.add_option('--stamp', help='Path to touch on success.')
-  parser.add_option('--enable', action='store_true',
-                    help='Run lint instead of just touching stamp.')
-
-  options, _ = parser.parse_args()
-
-  build_utils.CheckOptions(
-      options, parser, required=['lint_path', 'config_path',
-                                 'processed_config_path', 'manifest_path',
-                                 'result_path', 'product_dir',
-                                 'jar_path'])
-
-  if options.enable:
+
+  parser.add_argument('--lint-path', required=True,
+                      help='Path to lint executable.')
+  parser.add_argument('--product-dir', required=True,
+                      help='Path to product dir.')
+  parser.add_argument('--result-path', required=True,
+                      help='Path to XML lint result file.')
+
+  parser.add_argument('--build-tools-version',
+                      help='Version of the build tools in the Android SDK.')
+  parser.add_argument('--cache-dir',
+                      help='Path to the directory in which the android cache '
+                           'directory tree should be stored.')
+  parser.add_argument('--can-fail-build', action='store_true',
+                      help='If set, script will exit with nonzero exit status'
+                           ' if lint errors are present')
+  parser.add_argument('--config-path',
+                      help='Path to lint suppressions file.')
+  parser.add_argument('--enable', action='store_true',
+                      help='Run lint instead of just touching stamp.')
+  parser.add_argument('--jar-path',
+                      help='Jar file containing class files.')
+  parser.add_argument('--java-files',
+                      help='Paths to java files.')
+  parser.add_argument('--manifest-path',
+                      help='Path to AndroidManifest.xml')
+  parser.add_argument('--platform-xml-path',
+                      help='Path to api-platforms.xml')
+  parser.add_argument('--processed-config-path',
+                      help='Path to processed lint suppressions file.')
+  parser.add_argument('--resource-dir',
+                      help='Path to resource dir.')
+  parser.add_argument('--silent', action='store_true',
+                      help='If set, script will not log anything.')
+  parser.add_argument('--src-dirs',
+                      help='Directories containing java files.')
+  parser.add_argument('--stamp',
+                      help='Path to touch on success.')
+
+  args = parser.parse_args()
+
+  if args.enable:
     sources = []
-    if options.src_dirs:
-      src_dirs = build_utils.ParseGypList(options.src_dirs)
+    if args.src_dirs:
+      src_dirs = build_utils.ParseGypList(args.src_dirs)
       sources = build_utils.FindInDirectories(src_dirs, '*.java')
-    elif options.java_files:
-      sources = build_utils.ParseGypList(options.java_files)
-    else:
-      print 'One of --src-dirs or --java-files must be specified.'
-      return 1
+    elif args.java_files:
+      sources = build_utils.ParseGypList(args.java_files)
+
+    if args.config_path and not args.processed_config_path:
+      parser.error('--config-path specified without --processed-config-path')
+    elif args.processed_config_path and not args.config_path:
+      parser.error('--processed-config-path specified without --config-path')
 
     input_paths = [
-        options.lint_path,
-        options.config_path,
-        options.manifest_path,
-        options.jar_path,
+        args.lint_path,
     ]
-    input_paths.extend(sources)
-    if options.resource_dir:
-      input_paths.extend(build_utils.FindInDirectory(options.resource_dir, '*'))
-
-    input_strings = [ options.processed_config_path ]
-    output_paths = [ options.result_path ]
+    if args.config_path:
+      input_paths.append(args.config_path)
+    if args.jar_path:
+      input_paths.append(args.jar_path)
+    if args.manifest_path:
+      input_paths.append(args.manifest_path)
+    if args.platform_xml_path:
+      input_paths.append(args.platform_xml_path)
+    if args.resource_dir:
+      input_paths.extend(build_utils.FindInDirectory(args.resource_dir, '*'))
+    if sources:
+      input_paths.extend(sources)
+
+    input_strings = []
+    if args.processed_config_path:
+      input_strings.append(args.processed_config_path)
+
+    output_paths = [ args.result_path ]
+    if args.cache_dir:
+      if not args.build_tools_version:
+        parser.error('--cache-dir specified without --build-tools-version')
+      output_paths.append(os.path.join(
+          args.cache_dir, '.android', 'cache',
+          'api-versions-6-%s.bin' % args.build_tools_version))
 
     build_utils.CallAndWriteDepfileIfStale(
-        lambda changes: _OnStaleMd5(changes, options.lint_path,
-                                    options.config_path,
-                                    options.processed_config_path,
-                                    options.manifest_path, options.result_path,
-                                    options.product_dir, sources,
-                                    options.jar_path,
-                                    resource_dir=options.resource_dir,
-                                    can_fail_build=options.can_fail_build),
-        options,
+        lambda changes: _OnStaleMd5(changes, args.lint_path,
+                                    args.config_path,
+                                    args.processed_config_path,
+                                    args.manifest_path, args.result_path,
+                                    args.product_dir, sources,
+                                    args.jar_path,
+                                    args.cache_dir,
+                                    resource_dir=args.resource_dir,
+                                    can_fail_build=args.can_fail_build,
+                                    silent=args.silent),
+        args,
         input_paths=input_paths,
         input_strings=input_strings,
         output_paths=output_paths,