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123 lines
3.7 KiB
123 lines
3.7 KiB
#!/usr/bin/env python
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#
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# Copyright (C) 2019 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import argparse
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import collections
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import json
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import sys
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def follow_path(obj, path):
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cur = obj
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last_key = None
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for key in path.split('.'):
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if last_key:
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if last_key not in cur:
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return None,None
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cur = cur[last_key]
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last_key = key
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if last_key not in cur:
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return None,None
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return cur, last_key
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def ensure_path(obj, path):
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cur = obj
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last_key = None
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for key in path.split('.'):
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if last_key:
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if last_key not in cur:
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cur[last_key] = dict()
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cur = cur[last_key]
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last_key = key
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return cur, last_key
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class SetValue(str):
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def apply(self, obj, val):
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cur, key = ensure_path(obj, self)
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cur[key] = val
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class Replace(str):
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def apply(self, obj, val):
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cur, key = follow_path(obj, self)
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if cur:
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cur[key] = val
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class Remove(str):
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def apply(self, obj):
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cur, key = follow_path(obj, self)
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if cur:
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del cur[key]
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class AppendList(str):
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def apply(self, obj, *args):
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cur, key = ensure_path(obj, self)
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if key not in cur:
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cur[key] = list()
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if not isinstance(cur[key], list):
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raise ValueError(self + " should be a array.")
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cur[key].extend(args)
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument('-o', '--out',
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help='write result to a file. If omitted, print to stdout',
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metavar='output',
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action='store')
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parser.add_argument('input', nargs='?', help='JSON file')
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parser.add_argument("-v", "--value", type=SetValue,
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help='set value of the key specified by path. If path doesn\'t exist, creates new one.',
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metavar=('path', 'value'),
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nargs=2, dest='patch', default=[], action='append')
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parser.add_argument("-s", "--replace", type=Replace,
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help='replace value of the key specified by path. If path doesn\'t exist, no op.',
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metavar=('path', 'value'),
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nargs=2, dest='patch', action='append')
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parser.add_argument("-r", "--remove", type=Remove,
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help='remove the key specified by path. If path doesn\'t exist, no op.',
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metavar='path',
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nargs=1, dest='patch', action='append')
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parser.add_argument("-a", "--append_list", type=AppendList,
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help='append values to the list specified by path. If path doesn\'t exist, creates new list for it.',
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metavar=('path', 'value'),
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nargs='+', dest='patch', default=[], action='append')
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args = parser.parse_args()
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if args.input:
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with open(args.input) as f:
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obj = json.load(f, object_pairs_hook=collections.OrderedDict)
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else:
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obj = json.load(sys.stdin, object_pairs_hook=collections.OrderedDict)
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for p in args.patch:
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p[0].apply(obj, *p[1:])
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if args.out:
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with open(args.out, "w") as f:
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json.dump(obj, f, indent=2, separators=(',', ': '))
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f.write('\n')
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else:
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print(json.dumps(obj, indent=2, separators=(',', ': ')))
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if __name__ == '__main__':
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main()
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