publish.yml

---
name: Publish image to Docker container registries

env:
    # https://github.com/docker/metadata-action?tab=readme-ov-file#environment-variables
    DOCKER_METADATA_PR_HEAD_SHA: true
    REPO_NAME: quantum-espresso

on:
    workflow_call:
        inputs:
            runsOn:
                description: GitHub Actions Runner image
                required: true
                type: string
            image:
                description: Image built in build step
                required: true
                type: string
            registry:
                description: Docker container registry
                required: true
                type: string

jobs:

    release:
        runs-on: ${{ inputs.runsOn }}
        timeout-minutes: 30
        strategy:
            fail-fast: true

        steps:
            - uses: actions/checkout@v4

            - name: Login to GitHub Container Registry 🔑
              uses: docker/login-action@v3
              with:
                  registry: ghcr.io
                  username: ${{ github.actor }}
                  password: ${{ secrets.GITHUB_TOKEN }}

            - name: Read build variables
              id: build_vars
              run: |
                  vars=$(cat build.json | jq -c '[.variable | to_entries[] | {"key": .key, "value": .value.default}] | from_entries')
                  echo "vars=$vars" | tee -a "${GITHUB_OUTPUT}"

            - name: Docker meta
              id: meta
              uses: docker/metadata-action@v5
              env: ${{ fromJSON(steps.build_vars.outputs.vars) }}
              with:
                  # e.g. ghcr.io/cnts4sci/python
                  images: ${{ inputs.registry }}/${{ github.repository_owner }}/${{ env.REPO_NAME }}
                  tags: |
                      type=ref,event=pr 
                      type=edge,enable={{is_default_branch}}
                      type=match,pattern=(\d{4}\.\d{4}(-.+)?),group=1
                      type=raw,value=v${{ env.VERSION }},enable=${{ github.ref_type == 'tag' && startsWith(github.ref_name, 'v') }}

            - name: Determine source image
              id: image
              run: |
                  echo "src=${{ inputs.image }}" | tee -a "${GITHUB_OUTPUT}"

            - name: Push image
              uses: akhilerm/tag-push-action@v2.2.0
              with:
                  src: ${{ steps.image.outputs.src }}
                  dst: ${{ steps.meta.outputs.tags }}