name: skopeo-inspect
description: Check for the existence of a containerd image.
inputs:
  registry_host:
    description: A containerd registry host.
    required: false
    default: ${{ vars.INTELIGR8_REGISTRY_HOST }}
  image_namespace:
    description: A containerd image prefix.
    required: false
    default: ${{ vars.INTELIGR8_IMAGE_NAMESPACE }}
  image_name:
    description: A containerd image name, without the host and prefix.
    required: true
runs:
  using: "composite"
  steps:
    - id: containerd_debug
      uses: ./.gitea/actions/containerd-debug
    - id: skopeo_inspect
      env:
        REGISTRY_HOST: ${{ inputs.registry_host }}
        IMAGE_NAMESPACE: ${{ inputs.image_namespace }}
        IMAGE_NAME: ${{ inputs.image_name }}
        SKOPEO_DEBUG_OPTS: ${{ steps.containerd_debug.outputs.skopeo_debug_opts }}
      shell: bash
      run: |
        GIT_COMMIT_SHORT_SHA=${GITHUB_SHA::8}
        IMAGE_REMOTE_NAME=${REGISTRY_HOST}/${IMAGE_NAMESPACE}${IMAGE_NAME}
        
        set +e
        echo "Checking for image: ${IMAGE_REMOTE_NAME}:sha${GIT_COMMIT_SHORT_SHA}"
        skopeo ${SKOPEO_OPTS} ${SKOPEO_DEBUG_OPTS} inspect docker://${IMAGE_REMOTE_NAME}:sha${GIT_COMMIT_SHORT_SHA}
        SKOPEO_INSPECT_RC=$?
        set -e
        
        if (( ${SKOPEO_INSPECT_RC} == 0 )); then
          echo "Found image: ${IMAGE_REMOTE_NAME}:sha${GIT_COMMIT_SHORT_SHA}"
          echo "image_exists=true" >> $GITHUB_OUTPUT
        else
          echo "Could not find image: ${IMAGE_REMOTE_NAME}:sha${GIT_COMMIT_SHORT_SHA}"
          echo "image_exists=false" >> $GITHUB_OUTPUT
        fi
outputs:
  image_exists:
    description: `true` if the containerd image exists; `false` otherwise
    value: ${{ steps.skopeo_inspect.outputs.image_exists }}