action.yml

name: Docker Push
description: Push the images docker-build saved to an archive with several tags to Docker Hub, only the given images.

inputs:
  images:
    description: The images as given to docker-build, one per line, the first word of each line is the image
    required: true
  tags:
    description: Tags to push every image with, separated by whitespace
    required: true
  archive:
    description: Path of the archive of docker-build
    required: true
  username:
    description: Docker Hub username
    required: true
  password:
    description: Docker Hub token
    required: true

runs:
  using: composite
  steps:
    - name: Load the images
      shell: bash
      env:
        ARCHIVE: ${{ inputs.archive }}
      run: docker load --quiet --input "$ARCHIVE"

    - name: Login to Docker Hub
      uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
      with:
        username: ${{ inputs.username }}
        password: ${{ inputs.password }}

    # the archive comes from a job that ran the build, so only the given images are pushed, with the given tags
    - name: Push the images
      shell: bash
      env:
        IMAGES: ${{ inputs.images }}
        TAGS: ${{ inputs.tags }}
      run: |
        set -euo pipefail
        while read -r image _; do
          [ -z "$image" ] && continue
          if ! docker image inspect "${image}:ci-build" > /dev/null 2>&1; then
            echo "::error::the archive holds no image ${image}"
            exit 1
          fi
          for tag in $TAGS; do
            docker tag "${image}:ci-build" "${image}:${tag}"
            docker push "${image}:${tag}"
          done
        done <<< "$IMAGES"