build/dart/gen_test_invocation.py

#!/usr/bin/env python2.7
# Copyright 2017 The Fuchsia 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 stat
import string
import sys


def main():
    parser = argparse.ArgumentParser(
        description='Generate a script that invokes the Dart tester')
    parser.add_argument(
        '--out', help='Path to the invocation file to generate', required=True)
    parser.add_argument(
        '--source-dir', help='Path to test sources', required=True)
    parser.add_argument(
        '--dot-packages', help='Path to the .packages file', required=True)
    parser.add_argument(
        '--test-runner', help='Path to the test runner', required=True)
    parser.add_argument(
        '--flutter-shell', help='Path to the Flutter shell', required=True)
    args = parser.parse_args()

    test_file = args.out
    test_path = os.path.dirname(test_file)
    if not os.path.exists(test_path):
        os.makedirs(test_path)

    script_template = string.Template(
        '''#!/bin/sh

$test_runner \\
  --packages=$dot_packages \\
  --shell=$flutter_shell \\
  --test-directory=$source_dir \\
  "$$@"
''')
    with open(test_file, 'w') as file:
        file.write(script_template.substitute(args.__dict__))
    permissions = (
        stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR | stat.S_IRGRP |
        stat.S_IWGRP | stat.S_IXGRP | stat.S_IROTH)
    os.chmod(test_file, permissions)


if __name__ == '__main__':
    sys.exit(main())