[Android] Generate scripts at build time to run android tests.

build/android/gyp/create_test_runner_script.py

Index: build/android/gyp/create_test_runner_script.py
diff --git a/build/android/gyp/create_test_runner_script.py b/build/android/gyp/create_test_runner_script.py
new file mode 100755
index 0000000000000000000000000000000000000000..57cd6d2d364a40184a12783793805b39c7986959
--- /dev/null
+++ b/build/android/gyp/create_test_runner_script.py
@@ -0,0 +1,92 @@
+#!/usr/bin/env python
+#
+# 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.
+
+"""Creates a script to run an android test using build/android/test_runner.py.
+"""
+
+import argparse
+import os
+import sys
+
+from util import build_utils
+
+SCRIPT_TEMPLATE = """\
+#!/usr/bin/env python
+#
+# This file was generated by build/android/gyp/create_test_runner_script.py
+
+import logging
+import os
+import sys
+
+def main():
+  script_directory = os.path.dirname(__file__)
+
+  def ResolvePath(path):
+    \"\"\"Returns an absolute filepath given a path relative to this script.
+    \"\"\"
+    return os.path.abspath(os.path.join(script_directory, path))
+
+  test_runner_path = ResolvePath('{test_runner_path}')
+  test_runner_args = {test_runner_args}
+  test_runner_path_args = {test_runner_path_args}
+  for arg, path in test_runner_path_args.iteritems():
+    test_runner_args.extend([arg, ResolvePath(path)])
+
+  test_runner_cmd = ' '.join(
+      [test_runner_path] + test_runner_args + sys.argv[1:])
+  logging.critical(test_runner_cmd)
+  os.system(test_runner_cmd)
+
+if __name__ == '__main__':
+  sys.exit(main())
+"""
+
+def main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--script-output-path',
+                      help='Output path for executable script.')
+  parser.add_argument('--depfile',
+                      help='Path to the depfile. This must be specified as '
+                           'the action\'s first output.')

[jbudorick, 2015/05/18 18:20:23]

nit: double quotes around strings that contain single quotes.

[mikecase (-- gone --), 2015/05/18 18:43:45]

Done.

+  # We need to intercept any test runner path arguments and make all
+  # of the paths relative to the output script directory.
+  group = parser.add_argument_group('Test runner path arguments.')
+  group.add_argument('--output-directory')
+  group.add_argument('--isolate-file-path')
+  args, test_runner_args = parser.parse_known_args()
+
+  def RelativizePathToScript(path):

[jbudorick, 2015/05/18 18:20:23]

nit: I'm not sure if b/a/gyp/ follows this, but I've informally been saying
elsewhere in b/a/ that local functions should be lower_case_with_underscores.

[mikecase (-- gone --), 2015/05/18 18:43:46]

Acknowledged. The functions in b/a/gyp are all UpperCamelCase so I will keep as
is.

+    """Returns the path relative to the output script directory."""
+    return os.path.relpath(path, os.path.dirname(args.script_output_path))
+
+  test_runner_path = os.path.join(
+      os.path.dirname(__file__), os.path.pardir, 'test_runner.py')
+  test_runner_path = RelativizePathToScript(test_runner_path)
+
+  test_runner_path_args = {}
+  if args.output_directory:
+    test_runner_path_args['--output-directory'] = RelativizePathToScript(
+        args.output_directory)
+  if args.isolate_file_path:
+    test_runner_path_args['--isolate-file-path'] = RelativizePathToScript(
+        args.isolate_file_path)
+
+  with open(args.script_output_path, 'w') as script:
+    script.write(SCRIPT_TEMPLATE.format(
+        test_runner_path=str(test_runner_path),
+        test_runner_args=str(test_runner_args),
+        test_runner_path_args=str(test_runner_path_args)))
+
+  os.chmod(args.script_output_path, 0750)
+
+  if args.depfile:
+    build_utils.WriteDepfile(
+        args.depfile,
+        build_utils.GetPythonDependencies())
+
+if __name__ == '__main__':
+  sys.exit(main())