Add skydoc.py, a tool for running dartdoc

sky/tools/skyanalyzer

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 import argparse
 import os
 import re
 import subprocess
 import sys
 
+from skypy.url_mappings import URLMappings
+
 SKY_TOOLS_DIR = os.path.dirname(os.path.abspath(__file__))
 SKY_ROOT = os.path.dirname(SKY_TOOLS_DIR)
 SRC_ROOT = os.path.dirname(SKY_ROOT)
 
 _IGNORED_PATTERNS = [
   # Ignored because they're not indicative of specific errors.
   re.compile(r'^$'),
   re.compile(r'^Analyzing \['),
   re.compile(r'^No issues found'),
   re.compile(r'^[0-9]+ errors? and [0-9]+ warnings? found.'),
@@ skipping 17 matching lines @@
   # TODO: Remove this once Sky no longer generates this warning.
   # dartbug.com/23606
   re.compile(r'^\[warning] Missing concrete implementation of \'RenderObject.toString\''),
 ]
 
 def main():
     parser = argparse.ArgumentParser(description='Sky Analyzer')
     parser.add_argument('--congratulate', action="store_true")
     parser.add_argument('build_dir', type=str)
     parser.add_argument('app_path', type=str)
+
     args = parser.parse_args()
     build_dir = os.path.abspath(args.build_dir)
+
+    url_mappings = URLMappings(SRC_ROOT, build_dir)
     analyzer_path = os.path.join(SRC_ROOT, 'third_party/dart-sdk/dart-sdk/bin/dartanalyzer')
-    dart_builtin_natives_path = os.path.join(SRC_ROOT, 'sky/engine/bindings/builtin_natives.dart')
-    dart_mojo_internal_path = os.path.join(SRC_ROOT, 'mojo/public/dart/sdk_ext/internal.dart')
-    dart_sky_internals_path = os.path.join(SRC_ROOT, 'sky/engine/bindings/sky_internals.dart')
-    dart_sky_path = os.path.join(build_dir, 'gen/sky/bindings/dart_sky.dart')
     packages_root = os.path.join(build_dir, 'gen/dart-pkg/packages')
-    analyzer_args = [analyzer_path,
-        "--url-mapping=dart:mojo.internal,%s" % dart_mojo_internal_path,
-        "--url-mapping=dart:sky,%s" % dart_sky_path,
-        "--url-mapping=dart:sky.internals,%s" % dart_sky_internals_path,
-        "--url-mapping=dart:sky_builtin_natives,%s" % dart_builtin_natives_path,
+
+    analyzer_args = [
+        analyzer_path,
         "--package-root", packages_root,
-        "--package-warnings",
-        args.app_path
-    ]
+        "--package-warnings", args.app_path
+    ] + url_mappings.as_args
+
     try:
       subprocess.check_output(analyzer_args, stderr=subprocess.STDOUT)
     except subprocess.CalledProcessError as e:
       errors = [l for l in e.output.split('\n')
                 if not any(p.match(l) for p in _IGNORED_PATTERNS)]
       if len(errors) > 0:
         for error in errors:
           print >> sys.stderr, error
         # Propagate analyzer error code.
         return e.returncode
     # If we do not have any errors left after filtering, return 0.
     if args.congratulate:
       print >> sys.stdout, "No analyzer warnings!"
     return 0
 
 if __name__ == '__main__':
     sys.exit(main())