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11a2c7e893
* Add gclient parser. * pin python-installation version. * Update documentation. * Add license header.
103 lines
2.7 KiB
Python
103 lines
2.7 KiB
Python
#!/usr/bin/env python3
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#
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# Copyright 2013 The Flutter Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# Usage: deps_parser.py --deps <DEPS file> --output <flattened deps>
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#
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# This script parses the DEPS file, extracts the fully qualified dependencies
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# and writes the to a file. This file will be later used to validate the dependencies
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# are pinned to a hash.
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import argparse
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import os
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import sys
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SCRIPT_DIR = os.path.dirname(sys.argv[0])
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CHECKOUT_ROOT = os.path.realpath(os.path.join(SCRIPT_DIR, '..'))
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# Used in parsing the DEPS file.
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class VarImpl(object):
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_env_vars = {
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"host_cpu": "x64",
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"host_os": "linux",
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}
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def __init__(self, local_scope):
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self._local_scope = local_scope
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def Lookup(self, var_name):
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"""Implements the Var syntax."""
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if var_name in self._local_scope.get("vars", {}):
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return self._local_scope["vars"][var_name]
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# Inject default values for env variables
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if var_name in self._env_vars:
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return self._env_vars[var_name]
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raise Exception("Var is not defined: %s" % var_name)
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def ParseDepsFile(deps_file):
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local_scope = {}
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var = VarImpl(local_scope)
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global_scope = {
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'Var': var.Lookup,
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'deps_os': {},
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}
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# Read the content.
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with open(deps_file, 'r') as fp:
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deps_content = fp.read()
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# Eval the content.
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exec (deps_content, global_scope, local_scope)
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# Extract the deps and filter.
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deps = local_scope.get('deps', {})
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filtered_deps = []
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for k, v in deps.items():
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# We currently do not support packages or cipd which are represented
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# as dictionaries.
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if isinstance(v, str):
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filtered_deps.append(v)
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return filtered_deps
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def WriteManifest(deps, manifest_file):
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print('\n'.join(sorted(deps)))
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with open(manifest_file, 'w') as manifest:
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manifest.write('\n'.join(sorted(deps)))
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def ParseArgs(args):
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args = args[1:]
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parser = argparse.ArgumentParser(
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description='A script to flatten a gclient DEPS file.')
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parser.add_argument(
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'--deps',
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'-d',
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type=str,
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help='Input DEPS file.',
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default=os.path.join(CHECKOUT_ROOT, 'DEPS'))
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parser.add_argument(
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'--output',
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'-o',
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type=str,
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help='Output flattened deps file.',
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default=os.path.join(CHECKOUT_ROOT, 'deps_flatten.txt'))
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return parser.parse_args(args)
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def Main(argv):
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args = ParseArgs(argv)
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deps = ParseDepsFile(args.deps)
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WriteManifest(deps, args.output)
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return 0
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if __name__ == '__main__':
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sys.exit(Main(sys.argv))
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