gen_dart_package_config Namespace Reference

Classes
class	PackageConfig

Functions
	language_version_from_pubspec (pubspec)
	collect_packages (items, relative_to)
	main ()

Variables
	THIS_DIR = os.path.abspath(os.path.dirname(__file__))
str	DEFAULT_LANGUAGE_VERSION = '2.8'
	Package = collections.namedtuple('Package', ['name', 'rootUri', 'languageVersion', 'packageUri'])

Detailed Description

Reads the contents of a package config file generated by the build and
  converts it to a real package_config.json file

Function Documentation

collect_packages()

gen_dart_package_config.collect_packages	(		items,
			relative_to
	)

Reads metadata produced by GN to create lists of packages and pubspecs.
      - items: a list of objects collected from gn
      - relative_to: The directory which the packages are relative to. This is
        the location that contains the package_config.json file

  Returns None if there was a problem parsing packages

Definition at line 64 of file gen_dart_package_config.py.

def collect_packages(items, relative_to):
  """Reads metadata produced by GN to create lists of packages and pubspecs.
        - items: a list of objects collected from gn
        - relative_to: The directory which the packages are relative to. This is
          the location that contains the package_config.json file
 
    Returns None if there was a problem parsing packages
    """
  packages = []
  pubspec_paths = []
  for item in items:
    if 'language_version' in item:
      language_version = item['language_version']
    elif 'pubspec_path' in item:
      pubspec_paths.append(item['pubspec_path'])
      language_version = language_version_from_pubspec(item['pubspec_path'])
    else:
      language_version = DEFAULT_LANGUAGE_VERSION
 
    package = Package(
        name=item['name'],
        rootUri=os.path.relpath(item['root_uri'], relative_to),
        languageVersion=language_version,
        packageUri=item['package_uri']
    )
 
    # TODO(fxbug.dev/56428): enable once we sort out our duplicate packages
    # for p in packages:
    #   if p.rootUri == package.rootUri:
    #     print('Failed to create package_config.json file')
    #     print('The following packages contain the same package root ' + p.rootUri)
    #     print('  - ' + p.rootUri)
    #     print('  - ' + package.rootUri)
    #     return None
 
    packages.append(package)
 
  return packages, pubspec_paths
 
 

language_version_from_pubspec()

gen_dart_package_config.language_version_from_pubspec

(

pubspec

)

Parse the content of a pubspec.yaml

Definition at line 45 of file gen_dart_package_config.py.

def language_version_from_pubspec(pubspec):
  """Parse the content of a pubspec.yaml"""
  with open(pubspec) as pubspec:
    parsed = yaml.safe_load(pubspec)
    if not parsed:
      return DEFAULT_LANGUAGE_VERSION
 
    # If a format like sdk: '>=a.b' or sdk: 'a.b' is found, we'll use a.b.
    # In all other cases we default to "2.8"
    env_sdk = parsed.get('environment', {}).get('sdk', 'any')
    match = re.search(r'^(>=)?((0|[1-9]\d*)\.(0|[1-9]\d*))', env_sdk)
    if match:
      min_sdk_version = match.group(2)
    else:
      min_sdk_version = DEFAULT_LANGUAGE_VERSION
 
    return min_sdk_version
 
 

main()

gen_dart_package_config.main

(

)

Definition at line 104 of file gen_dart_package_config.py.

def main():
  parser = argparse.ArgumentParser(description=__doc__)
  parser.add_argument('--input', help='Path to original package_config', required=True)
  parser.add_argument('--output', help='Path to the updated package_config', required=True)
  parser.add_argument('--root', help='Path to fuchsia root', required=True)
  parser.add_argument('--depfile', help='Path to the depfile', required=True)
  args = parser.parse_args()
 
  with open(args.input, 'r') as input_file:
    contents = json.load(input_file)
 
  output_dir = os.path.dirname(os.path.abspath(args.output))
  packages, pubspec_paths = collect_packages(contents, output_dir)
  if packages is None:
    return 1
 
  with open(args.depfile, 'w') as depfile:
    depfile.write('%s: %s' % (args.output, ' '.join(pubspec_paths)))
 
  with open(args.output, 'w') as output_file:
    package_config = PackageConfig(packages)
    json.dump(
        package_config.asdict(), output_file, indent=2, sort_keys=True, separators=(',', ': ')
    )
 
  return 0
 
 

Variable Documentation

DEFAULT_LANGUAGE_VERSION

str gen_dart_package_config.DEFAULT_LANGUAGE_VERSION = '2.8'

Definition at line 21 of file gen_dart_package_config.py.

Package

gen_dart_package_config.Package = collections.namedtuple('Package', ['name', 'rootUri', 'languageVersion', 'packageUri'])

Definition at line 23 of file gen_dart_package_config.py.

THIS_DIR

gen_dart_package_config.THIS_DIR = os.path.abspath(os.path.dirname(__file__))

Definition at line 17 of file gen_dart_package_config.py.