What are good CLI tools for JSON?

Question

General Problem

Though I may be diagnosing the root cause of an event, determining how many users it affected, or distilling timing logs in order to assess the perform

Answer 1

Fortunately in XML-land, we have wonderful technologies like XPath, XQuery, and XSLT to help us.
[...]
So this leads me to my question: are there any tools like this for JSON?

If you ask me, Xidel is exactly what you're looking for.

Xidel is a command line tool to download and extract data from HTML/XML pages or JSON-APIs, using CSS, XPath 3.0, XQuery 3.0, JSONiq or pattern templates. It can also create new or transformed XML/HTML/JSON documents.

Query:

xidel -s "input.json" \
-e '
  $json/avg(
    count(
      (phoneNumber)()
    )
  )
'

or

xidel -s "input.json" -e '$json/avg(count((phoneNumber)()))'

Output:

2

Answer 2

I just found this:

http://stedolan.github.com/jq/

"jq is a lightweight and flexible command-line JSON processor."

2014 update:

@user456584 mentioned:

There's also the 'json' command (e.g. 'jsontool'). I tend to prefer it over jq. Very UNIX-y. Here's a link to the project: github.com/trentm/json –

in the json README at http://github.com/trentm/json there is a long list of similar things

• jq: http://stedolan.github.io/jq/
• json:select: http://jsonselect.org/
• jsonpipe: https://github.com/dvxhouse/jsonpipe
• json-command: https://github.com/zpoley/json-command
• JSONPath: http://goessner.net/articles/JsonPath/, http://code.google.com/p/jsonpath/wiki/Javascript
• jsawk: https://github.com/micha/jsawk
• jshon: http://kmkeen.com/jshon/
• json2: https://github.com/vi/json2
• fx: https://github.com/antonmedv/fx