Jq: Feature request: add support for standard query languages (JSONPath, JSON pointers)

[eadmaster]

I'd like to suggest adding support for some standard query languages like JSONPath and JSON pointers (RFC 6901) via cmdline switches. e.g.:
jq --jsonpath "/store/book[1]/title" books.json

[nichtich]

The syntax should rather be

jq 'jsonpath("/store/book[1]/title")' books.json

With jsonpath/1 being a function that translates path expressions to jq filters.

[nichtich]

Here you go with JSON Pointer:

~
jq 'include "jsonpointer"; pointer("/store/book/1/title")' books.json
~

[eadmaster]

can this be merged with jq so no include "jsonpointer"; is necessary?

[seansund]

This is the jsonpath statement I'd like to see supported:

The json is an array of items, each one having an id. I'd like to use jsonpath to find the item with id=X. e.g. jq '.[?(@.id = X)]'

[pkoppstein]

@seansund wrote:

The json is an array of items, each one having an id. I'd like to use jsonpath to find the item with id=X

For those who don't know, jq already handles this type of query, and in fact makes it easy to distinguish between its two main variants:

• all such items:

  .[] | select(.id==X)

• first such item:

  first(.[] | select(.id==X))