How do I set multiple path values in jq at once?

Question

I have figured out how to set a value in my JSON file, package.json, using setpath. Can I do this using a pattern?

cat package.json | jq 'setpath(["dependencies", "acme-a"]; "mytagname")'

What I would like to do is use a pattern like the following so it also sets the paths at "acme-b", "acme-c", and so on:

cat package.json | jq 'setpath(["dependencies", "acme-*"]; "mytagname")'

Does jq support that, and if so, how is it accomplished?

What are the contents of `package.json`, need it to reproduce it locally — Inian, Mar 27 '18 at 14:03
@Inian For the purposes of this, let's say it looks like `{"dependencies": {"acme-a": "1.0.0", "acme-b": "2.0.0", "acme-c": "3.0.0"} }` — Stewart, Mar 27 '18 at 14:16

peak · Accepted Answer · 2018-03-28T07:13:43.493

3

.dependencies |= with_entries(
  if .key|test("^acme-") then .value = "mytagname" else . end )

One could also use 'startswith'. It might be appropriate to use 'walk'.

To use 'setpath', one could use 'reduce' (e.g. with 'paths'), e.g.:

reduce paths as $p (.;
  if $p[-1] | test("^acme-") then setpath($p; "mytagname") else . end)

edited Mar 28 '18 at 07:13

answered Mar 27 '18 at 14:43

peak

1 Answers1