json5.jq

JSON5 implementation for jq

Warning

This is mostly an experiment at the moment. Performance is probably horrible and error handling non-existing.

Code it mostly a stripped down and modified versionf of jqjq.

Usage

$ cat example.json5
{
  // comments
  unquoted: 'and you can quote me on that',
  singleQuotes: 'I can use "double quotes" here',
  lineBreaks: "Look, Mom! \
No \\n's!",
  hexadecimal: 0xdecaf,
  leadingDecimalPoint: .8675309, andTrailing: 8675309.,
  positiveSign: +1,
  trailingComma: 'in objects', andIn: ['arrays',],
  "backwardsCompatible": "with JSON",
}

# -Rs to read content of example.json5 as a string, don't parse it as JSON
# -L . adds current directory to library path (where json5.jq is)
# include "json5" to load json5.jq
# fromjson5 to use included function on input string
$ jq -Rs -L . 'include "json5"; fromjson5' example.json5
{
  "unquoted": "and you can quote me on that",
  "singleQuotes": "I can use \"double quotes\" here",
  "lineBreaks": "Look, Mom! \\\nNo \\n's!",
  "hexadecimal": 912559,
  "leadingDecimalPoint": 0.8675309,
  "andTrailing": 8675309,
  "positiveSign": 1,
  "trailingComma": "in objects",
  "andIn": [
    "arrays"
  ],
  "backwardsCompatible": "with JSON"
}

$ jq -Rs -L . 'include "json5"; fromjson5 | .hexadecimal + .positiveSign' example.json5
912560

Put content of json5.jq in ~/.jq to make it be included automatically and you can do

$ jq -Rs fromjson5.a <<< '{a:0x123}'
291

Run tests

make test

TODO

• Cleanup jqjq remains
• Line/column on error
• Support {NaN: 123} etc. Lex NaN/Infinite and +/- as separate tokens and parse them?
• Verify supported whitespace. Now uses \s regexp