Merging JSON files under their own key using jq

Question

Trying to merge an undefined number of JSON files into one, each represented in their own key (using jq ).

Example:

$ cat foo.json
{
  "test1":"Foo"
}
$ cat bar.json
{
  "test2":"Bar"
}
$ jq -s "{`ls | sed -r 's/\.json$/: \./' | tr '\n' ', ' | sed 's/.$//'`}" `ls`
{
  "foo": [
    {
      "test1": "Foo"
    },
    {
      "test2": "Bar"
    }
  ],
  "bar": [
    {
      "test1": "Foo"
    },
    {
      "test2": "Bar"
    }
  ]
}

As I am trying to output:

{
  "foo": {
    "test1": "Foo"
  },
  "bar": {
    "test2": "Bar"
  }
}

For example: foo being the name of the first file and expected to be the key for its content in the final output.

(Also, I feel like this is not really pretty to call ls twice for the same thing, but not sure if there is a way around).

Answer 1

Roughly based on peak's answer use inputs with -n to read the JSON contents in one shot and removing the extension from the filename

jq -n '
  [inputs
   | {(input_filename | gsub(".*/|\\.json$";"")): .}]
   | add' *.json

Also as suggested by the original author, the solution above only removes UNIX-style paths, but not Windows-style paths.