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A comment on Tips on adding JSON output to your CLI app.

Re:Tips on adding JSON output to your CLI app by simonw on Sunday December 05, 2021 @06:12PM (#29454301)
I hadn't seen jc before (by the author of this piece: https://github.com/kellyjonbrazil/jc ) - what a great idea! It has parsers for around 80 different classic Unix utilities such that it can convert their output to JSON.

    ~ % dig example.com | jc --dig | jq
    [
      {
        "id": 61315,
        "opcode": "QUERY",
        "status": "NOERROR",
        "flags": [
          "qr",
          "rd",
          "ra"
        ],
        "query_num": 1,
        "answer_num": 1,
        "authority_num": 0,
        "additional_num": 1,
        "opt_pseudosection": {
          "edns": {
            "version": 0,
            "flags": [],
            "udp": 512
          }
        },
        "question": {
          "name": "example.com.",
          "class": "IN",
          "type": "A"
        },
        "answer": [
          {
            "name": "example.com.",
            "class": "IN",
            "type": "A",
            "ttl": 85586,
            "data": "93.184.216.34"
          }
        ],
        "query_time": 29,
        "server": "10.0.0.1#53(10.0.0.1)",
        "when": "Sun Dec 05 15:12:08 PST 2021",
        "rcvd": 56,
        "when_epoch": 1638745928,
        "when_epoch_utc": null
      }
    ]
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Re:Tips on adding JSON output to your CLI app by EdwardDiego on Sunday December 05, 2021 @08:16PM (#29455096)
Oh Christ yes, it supports lsof! The output from lsof has always been hard to script up.
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Re:Tips on adding JSON output to your CLI app by aasasd on Monday December 06, 2021 @05:56AM (#29458208)
Turns out I can cross out a todo item off my list, because I wanted to make exactly the same thing.

Now, to find a query tool with a saner language than Jq...

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Re:Tips on adding JSON output to your CLI app by kbrazil on Monday December 06, 2021 @11:03AM (#29461368)
If you like python you might check out jello[0]. I basically wrote it to give you the power and simplicity of python without the boiler plate in a jq-like form-factor. Jello also allows you to use dot-notation instead of dict bracket notation, so it does make things easier on the command line.

Also, there is jellex[1], which is a TUI wrapper around jello that can help you build your queries.

[0] https://github.com/kellyjonbrazil/jello [1] https://github.com/kellyjonbrazil/jellex

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Re:Tips on adding JSON output to your CLI app by ZeroGravitas on Monday December 06, 2021 @08:25AM (#29459418)
What kind of thing are you trying to do?

jq can get pretty deep but for most things in this area I'm not sure how it could improve upon, but would be interested in hearing alternatives.

https://github.com/fiatjaf/jiq

Is a realtime feedback wrapper which I find useful when crafting one-off command line uses for jq and it starts getting crazy.

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Re:Tips on adding JSON output to your CLI app by aasasd on Monday December 06, 2021 @11:07AM (#29461447)
Stepping just a little beyond regular ‘loop and filter’ is already difficult without consulting the manual each time — being exacerbated by the impossibility of finding those things in the manual without skimming through most of it. Making an ‘if’ for variations in the input structure is easily a twenty-minute job. Outside of the basic features, Jq's syntax is increasingly arcane and unintuitive—maybe those working with it daily do remember the ‘advanced’ stuff, but I don't.

I actually collected a sizable list of alternatives to Jq:

https://github.com/TomConlin/json2xpath

https://github.com/antonmedv/fx

https://github.com/simeji/jid

https://github.com/jmespath/jp

https://jsonnet.org

https://github.com/borkdude/jet

https://github.com/jzelinskie/faq

https://github.com/dflemstr/rq

https://github.com/mgdm/htmlq

And there's someone else's list of stuff around Jq: https://github.com/fiatjaf/awesome-jq

However, personally I think that next time I might instead fire up Hy, and use the regular syntax with the functional approach for any convoluted processing I come up with. Last time I mentioned this, another HNer made a Jq-like tool with Lisp-like syntax: https://github.com/cube2222/jql (from https://news.ycombinator.com/item?id=21981158).

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Re:Tips on adding JSON output to your CLI app by pdimitar on Monday December 06, 2021 @11:06AM (#29461414)
Have you checked these?

- https://github.com/antonmedv/fx

- https://github.com/antonmedv/gofx

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Re:Tips on adding JSON output to your CLI app by kbrazil on Monday December 06, 2021 @12:16PM (#29462540)
New parser contributions for JC are always welcome!
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