Loop through the output of fromJSON

[semihural-tomtom]

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Body

I am using docker/metada-action. How should I access all the items in the tags array?
I can able to access the first item like "${{fromJSON(steps.meta.outputs.json).tags[0]}}" but could not find a way to access all items in the array.

I tried numerous ways like the below and also but did not work. fromJSON(steps.meta.outputs.json).tags['*'],fromJSON(steps.meta.outputs.json).tags[@]

What is the best way of achieving this?

   - name: Push Image
      if: ${{ inputs.registry }}
      run: |
        for tag in ${{ fromJSON(steps.meta.outputs.json).tags[0] }}
        do
          echo tag
        done
      shell: bash

Here is the output

JSON output
  {
    "tags": [
      "azurecr.io/internal/dx-integration-bootstrap:feature-docker-action-bootstrap",
      "azurecr.io/internal/dx-integration-bootstrap:sha-e3416c8"
    ],

[ckingbailey]

This looks to me like a job for jq. You can use it on the stringified JSON output from the meta step, like

  - run: echo '${{ steps.meta.outputs.json }}' | jq '.tags[]'

jq is a powerful command line tool for querying JSON. There's a lot more you could do with it here, if you wanted. You could, for example, extract just the tags, separate from the registry and image name. jq manual here https://stedolan.github.io/jq/manual/

[semihural-tomtom]

Using join function helped me to achieve what I want

- name: Push Image
  if: ${{ inputs.registry }}
  run: |
    for tag in ${{ join(fromJSON(steps.meta.outputs.json).tags, ' ') }}
    do
      echo "Pushing $tag"
      docker push $tag
    done
  shell: bash

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