name: containerd-build
description: Builds 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
  build_opts:
    description: A string of options for the containerd CLI build command.
    required: false
    default: --quiet
runs:
  using: "composite"
  steps:
    - id: containerd_debug
      uses: ./.gitea/actions/containerd-debug
    - id: skopeo_inspect
      uses: ./.gitea/actions/skopeo-inspect
      with:
        image_name: base-runner
    - id: containerd_build
      working-directory: containerd
      env:
        REGISTRY_HOST: ${{ inputs.registry_host }}
        IMAGE_NAMESPACE: ${{ inputs.image_namespace }}
        IMAGE_NAME: ${{ inputs.image_name }}
        CONTAINERD_CMD: buildah
        CONTAINERD_BUILD_FORMAT: docker
        CONTAINERD_BUILD_OPTS: ${{ inputs.build_opts }}
        CONTAINERD_CMD_DEBUG_OPTS: ${{ steps.containerd_debug.outputs.containerd_cmd_debug_opts }}
        CONTAINERD_IMAGE_EXISTS: ${{ steps.skopeo_inspect.outputs.image_exists }}
      shell: bash
      run: |
        if (( ${CONTAINERD_IMAGE_EXISTS} == "true" )); then
          echo "Container image already built; skipping rebuild"
        else
          GIT_COMMIT_SHORT_SHA=${GITHUB_SHA::8}
          IMAGE_REMOTE_NAME=${REGISTRY_HOST}/${IMAGE_NAMESPACE}${IMAGE_NAME}
        
          echo "image_tag=sha${GIT_COMMIT_SHORT_SHA}" >> $GITHUB_OUTPUT
        
          echo "Building container image"
          ${CONTAINERD_CMD} ${CONTAINERD_CMD_OPTS} ${CONTAINERD_CMD_DEBUG_OPTS} build \
            --format=${CONTAINERD_BUILD_FORMAT} \
            ${CONTAINERD_BUILD_OPTS} \
            --tag ${IMAGE_REMOTE_NAME}:sha${GIT_COMMIT_SHORT_SHA}
outputs:
  image_tag:
    description: The resultant containerd image tag.
    value: ${{ steps.containerd_build.outputs.image_tag }}