[Android] Sets up a coverage system for java using EMMA

build/android/generate_emma_html.py

Index: build/android/generate_emma_html.py
diff --git a/build/android/generate_emma_html.py b/build/android/generate_emma_html.py
new file mode 100755
index 0000000000000000000000000000000000000000..47a66171f3c38b77409e2f7f3cb272175b54a977
--- /dev/null
+++ b/build/android/generate_emma_html.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+
+# Copyright 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.
+
+"""Accumulates EMMA coverage files to produce html output."""

[frankf, 2013/08/01 19:57:41]

Aggregates

[gkanwar1, 2013/08/07 19:24:56]

Done.

+
+import logging
+import optparse
+import os
+import sys
+
+from pylib import cmd_helper
+from pylib import constants
+
+
+def _GetFilesWithExt(root_dir, ext):
+  """Gets all files with a given extension.
+
+  Args:
+    root_dir: Directory in which to search for files.
+    ext: Extension to look for (including dot)
+
+  Returns:
+    A list of absolute paths to files that match.
+  """
+

[frankf, 2013/08/01 19:57:41]

no blank line

[gkanwar1, 2013/08/07 19:24:56]

Done.

+  files = []
+  for root, _, filenames in os.walk(root_dir):
+    basenames = [f for f in filenames if os.path.splitext(f)[1] == ext]
+    files.extend([os.path.join(root, basename)
+                  for basename in basenames])
+
+  return files
+
+
+def main(argv):
+  option_parser = optparse.OptionParser()
+  option_parser.add_option('-o', '--output', help='HTML output filename.')
+  option_parser.add_option('-c', '--coverage_dir', default=None,

[frankf, 2013/08/01 19:57:41]

- not _
also below

[gkanwar1, 2013/08/07 19:24:56]

Done.

+                           help=('Root of the directory in which to search for '
+                                 'coverage data (.ec) files.'))
+  option_parser.add_option('-m', '--metadata_dir', default=None,
+                           help=('Root of the directory in which to search for '
+                                 'coverage metadata (.em) files.'))
+  options, args = option_parser.parse_args()
+
+  if not (options.coverage_dir and options.metadata_dir and options.output):
+    option_parser.error('All arguments are required.')
+    return constants.ERROR_EXIT_CODE
+
+  emma_jar = os.path.join(constants.ANDROID_SDK_ROOT, 'tools', 'lib',
+                           'emma.jar')
+
+  coverage_files = _GetFilesWithExt(options.coverage_dir, '.ec')
+  metadata_files = _GetFilesWithExt(options.metadata_dir, '.em')
+  sources_files = []
+  for f in metadata_files:
+    sources_file = os.path.join(os.path.dirname(f), 'emma_sources.txt')
+    if os.path.exists(sources_file):
+      with open(sources_file, 'r') as f:
+        sources_files.extend(f.read().split(' '))

[frankf, 2013/08/01 19:57:41]

can you just split()

[gkanwar1, 2013/08/07 19:24:56]

Good point. That's more robust also.

+
+  input_args = []
+  for f in coverage_files + metadata_files:
+    input_args.append('-in')
+    input_args.append(f)
+
+  output_args = ['-Dreport.html.out.file', options.output]
+  source_args = ['-sp', ','.join(sources_files)]
+
+  return cmd_helper.RunCmd(['java', '-cp', emma_jar, 'emma',

[frankf, 2013/08/01 19:57:41]

align on next line

[gkanwar1, 2013/08/07 19:24:56]

I assume by this you mean to move all args down to the next line, and indent 4
spaces? If so, done.

+                            'report', '-r', 'html']
+                           + input_args + output_args + source_args)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))