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json (aka jsontool) Changelog

json 2.0.1

  • [issue#23] Fix output in '-a|--array' mode if one or more keys don't exist in one or more of the array items.

json 2.0.0

  • '-o | --output MODE' support. Supported modes:

    jsony (default): JSON with string quotes elided
    json: JSON output, 2-space indent
    json-N: JSON output, N-space indent, e.g. 'json-4'
    inspect: node.js `util.inspect` output
  • '-a|--array' for independently processing each element of an input array.

    $ echo '[
      "name": "Trent",
      "id": 12,
      "email": ""
      "name": "Mark",
      "id": 13,
      "email": ""
    ]' | json -a name email

    This example shows that '-a' results in tabular output. The '-d' option can be used to specify a delimiter other than the default single space, e.g.:

    json -d, -a field1 field2

    [Backward Incompatibility] This is a replacement for the experimental '*' syntax in the lookup strings (previously enabled via '-x|--experimental'). That syntax and option has been removed.

  • Add '--' option processing support and error out if an unknown option is given.

  • Support multiple top-level JSON objects as input to mean a list of these object:

    $ echo '{"one": 1}
    {"two": 1}' | ./lib/jsontool.js
        "one": 1
        "two": 1

    This can be nice to process a stream of JSON objects generated from multiple calls to another tool or cat *.json | json. Rules:

    • Only JS objects and arrays. Don't see strong need for basic JS types right now and this limitation simplifies.
    • The break between JS objects has to include a newline. I.e. good:

      {"one": 1}
      {"two": 2}


      {"one": 1}{"two": 2}

      This condition should be fine for typical use cases and ensures no false matches inside JS strings.

json 1.4.1

  • [issue #9] Gracefully handle EPIPE (i.e. stdout being closed on json before it is finished writing).

json 1.4.0

  • [issue #19] Allow multiple lookup arguments:

    $ echo '{"one": 1, "two": 2}' | json one two

    WARNING: This involve a backward incompatible change in the JS APIs jsontool.processDatum and jsontool.processDatumExperimental.

json 1.3.4

  • [issue #18] Fix json --version for standalone mode again (was broken in json 1.3.3).

json 1.3.3

  • WARNING: json --version is broken when running outside the source (or npm install'd) tree. I.e. this is a bad release for standalone.
  • [issue #17] Ensure stdout is flushed on exit.

json 1.3.2

  • [issue #16] Fix to use <regex object>.exec instead of using the regex object as a function -- no longer allowed in the v8 used in node v0.5.x.

json 1.3.1

  • Make "jsontool" require'able as a module. For example, you can now:

    $ npm install jsontool
    $ node
    > var jsontool = require('jsontool')
    > jsontool.parseLookup('a.b.c')
    [ 'a', 'b', 'c' ]
    > jsontool.parseLookup('my-key.0["bar"]')
    [ 'my-key', '0', '["bar"]' ]
    > jsontool.main(['', '', '--help'])
    Usage: <something generating JSON on stdout> | json [options] [lookup]

    Currently other exported API is experimental and will likely change to be more generally useful (e.g. the current processDatum isn't all handy for module usage).

    Note: For command-line usage, the main module has moved from "json" to "lib/jsontool.js". So, if you are not using npm, you can setup the json command via something like:

      alias json='.../json/lib/jsontool.js'

json 1.3.0

  • package.json and publish to npm as "jsontool" ("json" name is taken)
  • Add experimental support for '*' in the lookup. This will extract all the elements of an array. Examples:

      $ echo '["a", "b", "c"]' | json -x '*'
      $ echo '[{"one": "un"}, {"two": "deux"}]' | json -x '*'
        "one": "un"
        "two": "deux"
      $ echo '[{"foo": "bar"}, {"foo": "baz"}]' | json -x '*.foo'

    This is still experimental because I want to feel it out (is it useful? does it cause problems for regular usage?) and it is incomplete. The second example above shows that with '*', json can emit multiple JSON documents. json needs to change to support accepting multiple JSON documents.

    Also, a limitation: How to extract multiple fields from a list of objects? Is this even a necessary feature? Thinking out loud:

      '*.{name,version}'      # a la bash. Josh likes it. What else do you need?
  • Add '-x|--experimental' option to turn on incomplete/experimental features.

json 1.2.1

  • [issue #12] Fix handling of output when result of lookup is undefined.

json 1.2.0

  • [issue #10] Fix for node v0.5.

json 1.1.9

  • [Issue 8] Don't emit a newline for empty output.

json 1.1.8

  • [Issue 7] Handle "HTTP/1.1 100 Continue" leading header block.
  • [Issue 4] Add a man page (using ronnjs).

json 1.1.7

  • [Issue 5] Fix getting a key with a period. E.g.:

    echo '{"": 42}' | json '[""]'

    json is now doing much better lookup string parsing. Because escapes are now handled properly you can do the equivalent a little more easily:

      $ echo '{"": 42}' | json foo\\.bar

json 1.1.6

  • [Issue 6] Error exit value if invalid JSON.

json 1.1.4

  • [Issue 2] Fix bracket notation: echo '{"foo-bar": "baz"}' | json '["foo-bar"]'

(Started maintaining this log 19 March 2011. For earlier change information you'll have to dig into the commit history.)

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