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51 lines
1.6 KiB
Python
51 lines
1.6 KiB
Python
# Copyright (c) 2013 The Chromium 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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"""This module holds utilities which make writing configs easier."""
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import json
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class Config(object):
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"""Base class for all configs.
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Provides methods that are expected to be overridden by child classes. Also
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provides an command-line parsing method that converts the unified command-line
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interface used in depot_tools to the unified python interface defined here."""
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@staticmethod
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def fetch_spec(_props):
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"""Returns instructions to check out the project, conditioned on |props|."""
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raise NotImplementedError
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@staticmethod
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def expected_root(_props):
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"""Returns the directory into which the checkout will be performed."""
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raise NotImplementedError
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def handle_args(self, argv):
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"""Passes the command-line arguments through to the appropriate method."""
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methods = {'fetch': self.fetch_spec,
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'root': self.expected_root}
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if len(argv) <= 1 or argv[1] not in methods:
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print 'Must specify a a fetch/root action'
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return 1
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def looks_like_arg(arg):
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return arg.startswith('--') and arg.count('=') == 1
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bad_parms = [x for x in argv[2:] if not looks_like_arg(x)]
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if bad_parms:
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print 'Got bad arguments %s' % bad_parms
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return 1
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method = methods[argv[1]]
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props = dict(x.split('=', 1) for x in (y.lstrip('-') for y in argv[2:]))
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self.output(method(props))
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@staticmethod
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def output(data):
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print(json.dumps(data))
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