d42fd51f35
Debate rages about whether JSON should have comments. The specification says it shouldn't but the author of JSON suggested that if you want to use JSON for configuration, then pipe it through jsmin before parsing. So that's what we do, using a tiny JSON minifier from https://github.com/getify/JSON.minify/tree/python Closes #135
97 lines
3.6 KiB
Python
97 lines
3.6 KiB
Python
# Copyright © 2020 Kyle Simpson <getify@gmail.com>
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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# DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
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# OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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"""A port of the `JSON-minify` utility to the Python language.
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Based on JSON.minify.js: https://github.com/getify/JSON.minify
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Contributers:
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- Gerald Storer
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- Contributed original version
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- Felipe Machado
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- Performance optimization
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- Pradyun S. Gedam
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- Conditions and variable names changed
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- Reformatted tests and moved to separate file
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- Made into a PyPI Package
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"""
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import re
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# Vimspector modification: strip_space defaults to False; we don't actually want
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# to minify - we just want to strip comments.
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def minify(string, strip_space=False):
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tokenizer = re.compile('"|(/\*)|(\*/)|(//)|\n|\r')
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end_slashes_re = re.compile(r'(\\)*$')
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in_string = False
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in_multi = False
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in_single = False
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new_str = []
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index = 0
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for match in re.finditer(tokenizer, string):
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if not (in_multi or in_single):
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tmp = string[index:match.start()]
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if not in_string and strip_space:
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# replace white space as defined in standard
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tmp = re.sub('[ \t\n\r]+', '', tmp)
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new_str.append(tmp)
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elif not strip_space:
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# Replace comments with white space so that the JSON parser reports
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# the correct column numbers on parsing errors.
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new_str.append(' ' * (match.start() - index))
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index = match.end()
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val = match.group()
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if val == '"' and not (in_multi or in_single):
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escaped = end_slashes_re.search(string, 0, match.start())
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# start of string or unescaped quote character to end string
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if not in_string or (escaped is None or len(escaped.group()) % 2 == 0): # noqa
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in_string = not in_string
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index -= 1 # include " character in next catch
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elif not (in_string or in_multi or in_single):
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if val == '/*':
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in_multi = True
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elif val == '//':
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in_single = True
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elif val == '*/' and in_multi and not (in_string or in_single):
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in_multi = False
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if not strip_space:
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new_str.append(' ' * len(val))
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elif val in '\r\n' and not (in_multi or in_string) and in_single:
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in_single = False
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elif not ((in_multi or in_single) or (val in ' \r\n\t' and strip_space)): # noqa
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new_str.append(val)
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if not strip_space:
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if val in '\r\n':
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new_str.append(val)
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elif in_multi or in_single:
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new_str.append(' ' * len(val))
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new_str.append(string[index:])
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return ''.join(new_str)
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