name: Container

'on':
  pull_request:
  push:

permissions:
  contents: read

concurrency:
  group: container-${{ gitea.workflow }}-${{ gitea.ref }}
  cancel-in-progress: true

jobs:
  amd64:
    runs-on: ubuntu-latest
    timeout-minutes: 30
    steps:
      - name: Check out source
        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
        with:
          persist-credentials: false

      - name: Set up Buildx
        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3

      - name: Select image tags
        id: image
        env:
          CONFIGURED_IMAGE: ${{ vars.CONTAINER_IMAGE }}
          EVENT_NAME: ${{ gitea.event_name }}
          GITEA_REF: ${{ gitea.ref }}
          GITEA_SHA: ${{ gitea.sha }}
        run: |
          publish=false
          image=labtimesheet
          if [ "$EVENT_NAME" = "push" ] && [ "$GITEA_REF" = "refs/heads/main" ]; then
            test -n "$CONFIGURED_IMAGE" || { echo "Repository variable CONTAINER_IMAGE is required" >&2; exit 1; }
            publish=true
            image="$CONFIGURED_IMAGE"
          fi
          {
            echo "publish=$publish"
            echo "image=$image"
            echo "registry=${image%%/*}"
            echo "tags<<EOF"
            echo "$image:sha-${GITEA_SHA}-amd64"
            if [ "$publish" = "true" ]; then
              echo "$image:sha-${GITEA_SHA}"
              echo "$image:main"
            fi
            echo "EOF"
          } >> "$GITHUB_OUTPUT"

      - name: Log in to registry
        if: steps.image.outputs.publish == 'true'
        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
        with:
          registry: ${{ steps.image.outputs.registry }}
          username: ${{ secrets.REGISTRY_USERNAME }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Build AMD64 image and publish main
        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6
        with:
          context: .
          platforms: linux/amd64
          push: ${{ steps.image.outputs.publish }}
          tags: ${{ steps.image.outputs.tags }}
          build-args: |
            VCS_REF=${{ gitea.sha }}

  arm64:
    # Gitea cannot schedule a probe on a missing label. Enable this repository variable only
    # while a trusted ubuntu-latest-arm runner is registered and online.
    if: gitea.event_name == 'push' && gitea.ref == 'refs/heads/main' && vars.ARM64_RUNNER_AVAILABLE == 'true'
    runs-on: ubuntu-latest-arm
    timeout-minutes: 30
    steps:
      - name: Check out source
        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
        with:
          persist-credentials: false

      - name: Set up Buildx
        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3

      - name: Require image configuration
        id: image
        env:
          CONFIGURED_IMAGE: ${{ vars.CONTAINER_IMAGE }}
          GITEA_SHA: ${{ gitea.sha }}
        run: |
          test -n "$CONFIGURED_IMAGE" || { echo "Repository variable CONTAINER_IMAGE is required" >&2; exit 1; }
          echo "image=$CONFIGURED_IMAGE" >> "$GITHUB_OUTPUT"
          echo "registry=${CONFIGURED_IMAGE%%/*}" >> "$GITHUB_OUTPUT"
          echo "tag=$CONFIGURED_IMAGE:sha-${GITEA_SHA}-arm64" >> "$GITHUB_OUTPUT"

      - name: Log in to registry
        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
        with:
          registry: ${{ steps.image.outputs.registry }}
          username: ${{ secrets.REGISTRY_USERNAME }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Build native ARM64 image
        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6
        with:
          context: .
          platforms: linux/arm64
          push: true
          tags: ${{ steps.image.outputs.tag }}
          build-args: |
            VCS_REF=${{ gitea.sha }}

  manifest:
    if: gitea.event_name == 'push' && gitea.ref == 'refs/heads/main' && vars.ARM64_RUNNER_AVAILABLE == 'true'
    needs: [amd64, arm64]
    runs-on: ubuntu-latest
    timeout-minutes: 10
    steps:
      - name: Set up Buildx
        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3

      - name: Resolve registry
        id: image
        env:
          CONFIGURED_IMAGE: ${{ vars.CONTAINER_IMAGE }}
        run: |
          test -n "$CONFIGURED_IMAGE" || { echo "Repository variable CONTAINER_IMAGE is required" >&2; exit 1; }
          echo "registry=${CONFIGURED_IMAGE%%/*}" >> "$GITHUB_OUTPUT"

      - name: Log in to registry
        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
        with:
          registry: ${{ steps.image.outputs.registry }}
          username: ${{ secrets.REGISTRY_USERNAME }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Publish combined manifest
        env:
          IMAGE: ${{ vars.CONTAINER_IMAGE }}
          GITEA_SHA: ${{ gitea.sha }}
        run: |
          docker buildx imagetools create \
            --tag "$IMAGE:sha-${GITEA_SHA}" \
            --tag "$IMAGE:main" \
            "$IMAGE:sha-${GITEA_SHA}-amd64" \
            "$IMAGE:sha-${GITEA_SHA}-arm64"