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# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""A tool to parse and pretty-print JSON5.
Usage:
$ echo '{foo:"bar"}' | python -m json5
{
foo: 'bar',
}
$ echo '{foo:"bar"}' | python -m json5 --as-json
{
"foo": "bar"
}
"""
import argparse
import sys
import json5
from json5.host import Host
from json5.version import __version__
QUOTE_STYLES = {q.value: q for q in json5.QuoteStyle}
def main(argv=None, host=None):
host = host or Host()
args = _parse_args(host, argv)
if args.version:
host.print(__version__)
return 0
if args.cmd:
inp = args.cmd
elif args.file == '-':
inp = host.stdin.read()
else:
inp = host.read_text_file(args.file)
if args.indent == 'None':
args.indent = None
else:
try:
args.indent = int(args.indent)
except ValueError:
pass
if args.as_json:
args.quote_keys = True
args.trailing_commas = False
args.quote_style = json5.QuoteStyle.ALWAYS_DOUBLE.value
obj = json5.loads(inp, strict=args.strict)
s = json5.dumps(
obj,
indent=args.indent,
quote_keys=args.quote_keys,
trailing_commas=args.trailing_commas,
quote_style=QUOTE_STYLES[args.quote_style],
)
host.print(s)
return 0
class _HostedArgumentParser(argparse.ArgumentParser):
"""An argument parser that plays nicely w/ host objects."""
def __init__(self, host, **kwargs):
self.host = host
super().__init__(**kwargs)
def exit(self, status=0, message=None):
if message:
self._print_message(message, self.host.stderr)
sys.exit(status)
def error(self, message):
self.host.print(f'usage: {self.usage}', end='', file=self.host.stderr)
self.host.print(' -h/--help for help\n', file=self.host.stderr)
self.exit(2, f'error: {message}\n')
def print_help(self, file=None):
self.host.print(self.format_help(), file=file)
def _parse_args(host, argv):
usage = 'json5 [options] [FILE]\n'
parser = _HostedArgumentParser(
host,
prog='json5',
usage=usage,
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter,
)
parser.add_argument(
'-V',
'--version',
action='store_true',
help=f'show JSON5 library version ({__version__})',
)
parser.add_argument(
'-c',
metavar='STR',
dest='cmd',
help='inline json5 string to read instead of reading from a file',
)
parser.add_argument(
'--as-json',
dest='as_json',
action='store_const',
const=True,
default=False,
help='output as JSON (same as --quote-keys --no-trailing-commas)',
)
parser.add_argument(
'--indent',
dest='indent',
default=4,
help='amount to indent each line (default is 4 spaces)',
)
parser.add_argument(
'--quote-keys',
action='store_true',
default=False,
help='quote all object keys',
)
parser.add_argument(
'--no-quote-keys',
action='store_false',
dest='quote_keys',
help="don't quote object keys that are identifiers"
' (this is the default)',
)
parser.add_argument(
'--trailing-commas',
action='store_true',
default=True,
help='add commas after the last item in multi-line '
'objects and arrays (this is the default)',
)
parser.add_argument(
'--no-trailing-commas',
dest='trailing_commas',
action='store_false',
help='do not add commas after the last item in '
'multi-line lists and objects',
)
parser.add_argument(
'--strict',
action='store_true',
default=True,
help='Do not allow control characters (\\x00-\\x1f) in strings '
'(default)',
)
parser.add_argument(
'--no-strict',
dest='strict',
action='store_false',
help='Allow control characters (\\x00-\\x1f) in strings',
)
parser.add_argument(
'--quote-style',
action='store',
default='always_double',
choices=QUOTE_STYLES.keys(),
help='Controls how strings are encoded. By default they are always '
'double-quoted ("always_double")',
)
parser.add_argument(
'file',
metavar='FILE',
nargs='?',
default='-',
help='optional file to read JSON5 document from; if '
'not specified or "-", will read from stdin '
'instead',
)
return parser.parse_args(argv)
if __name__ == '__main__': # pragma: no cover
sys.exit(main())
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