catapult_build/print_project_info

#!/usr/bin/env python
# Copyright (c) 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 sys
import os
import json

"""
Prints the source path of the provided project name.

This utility loads the specified x_project.py from one of our standard
module folders, constructs its project module, and prints the source paths that
it uses.

This is used by the node_bootstrap.js to load the tracing code into node.
"""

def _ToUpperCamelCase(name):
  in_parts = name.split('_')
  out_parts = []
  for part in in_parts:
    out_part = part[0].upper() + part[1:]
    out_parts.append(out_part)
  return ''.join(out_parts)

def _RelPathToUnixPath(p):
  return p.replace(os.sep, '/')

def Main(args):
  parser = argparse.ArgumentParser(
      usage='%(prog)s project_name',
      epilog='Prints the source paths for the provided catapult project\n')
  parser.add_argument('--source-paths', action='store_true')
  parser.add_argument('--headless-test-module-filenames', action='store_true')
  parser.add_argument('project_name', nargs=1)
  args = parser.parse_args(args)

  catapult_path = os.path.abspath(os.path.join(os.path.dirname(__file__),
                                 '..'))

  project_name = args.project_name[0]
  project_path = os.path.join(catapult_path, project_name)
  sys.path.append(project_path)

  project_module_name = project_name + '_project'
  try:
    project_module = __import__(project_module_name, fromlist=[True])
  except:
    sys.stderr.write('Could not import %s from %s' % (project_module_name,
                                                      project_path))
    return 1

  project_module.UpdateSysPathIfNeeded()

  class_name = _ToUpperCamelCase(project_name) + 'Project'

  try:
    project_class = project_module.__dict__[class_name]
  except:
    sys.stderr.write('Could not find %s in %s' % (class_name,
                                                  project_module_name))
    return 1

  project = project_class()

  if args.source_paths:
    print json.dumps(project.source_paths)

  if args.headless_test_module_filenames:
    headless_test_module_filenames = ['/' + _RelPathToUnixPath(x)
                              for x in project.FindAllD8TestModuleRelPaths()]
    headless_test_module_filenames.sort()
    print json.dumps(headless_test_module_filenames)


if __name__ == '__main__':
  sys.exit(Main(sys.argv[1:]))