Build Docker Image workflow (open-webui/open-terminal)

name: Build Docker Image
 
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
 
env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    runs-on: latchkey-small
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm64
        variant:
          - name: default
            file: Dockerfile
            suffix: ""
            short_tag: "latest"
          - name: slim
            file: Dockerfile.slim
            suffix: "-slim"
            short_tag: "slim"
          - name: alpine
            file: Dockerfile.alpine
            suffix: "-alpine"
            short_tag: "alpine"
    permissions:
      contents: read
      packages: write
 
    steps:
      - uses: actions/checkout@v4
 
      - uses: docker/setup-qemu-action@v3
 
      - uses: docker/setup-buildx-action@v3
 
      - uses: docker/login-action@v3
        if: github.event_name != 'pull_request'
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
 
      - uses: docker/metadata-action@v5
        id: meta
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
      - uses: docker/build-push-action@v5
        id: build
        with:
          context: .
          file: ${{ matrix.variant.file }}
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=${{ github.event_name != 'pull_request' }}
          cache-from: type=gha,scope=${{ matrix.variant.name }}-${{ matrix.platform }}
          cache-to: type=gha,scope=${{ matrix.variant.name }}-${{ matrix.platform }},mode=max
 
      - name: Export digest
        if: github.event_name != 'pull_request'
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"
 
      - uses: actions/upload-artifact@v4
        if: github.event_name != 'pull_request'
        with:
          name: digests-${{ matrix.variant.name }}-${{ matrix.platform == 'linux/amd64' && 'amd64' || 'arm64' }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1
 
  merge:
    timeout-minutes: 30
    runs-on: latchkey-small
    if: github.event_name != 'pull_request'
    needs: build
    strategy:
      matrix:
        variant:
          - name: default
            suffix: ""
            short_tag: "latest"
          - name: slim
            suffix: "-slim"
            short_tag: "slim"
          - name: alpine
            suffix: "-alpine"
            short_tag: "alpine"
    permissions:
      contents: read
      packages: write
 
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
 
      - name: Get version from pyproject.toml
        id: version
        run: |
          VERSION=$(python3 -c "import tomllib; print(tomllib.load(open('pyproject.toml','rb'))['project']['version'])")
          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
          MAJOR_MINOR=$(echo "$VERSION" | cut -d. -f1,2)
          echo "major_minor=$MAJOR_MINOR" >> "$GITHUB_OUTPUT"
          if git rev-parse "refs/tags/v$VERSION" >/dev/null 2>&1; then
            TAG_SHA=$(git rev-list -n 1 "v$VERSION")
            if [ "$TAG_SHA" = "${{ github.sha }}" ]; then
              echo "is_new_version=true" >> "$GITHUB_OUTPUT"
            else
              echo "is_new_version=false" >> "$GITHUB_OUTPUT"
            fi
          else
            echo "is_new_version=true" >> "$GITHUB_OUTPUT"
          fi
 
      - uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digests-${{ matrix.variant.name }}-*
          merge-multiple: true
 
      - uses: docker/setup-buildx-action@v3
 
      - uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
 
      - uses: docker/metadata-action@v5
        id: meta
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest${{ matrix.variant.suffix }},enable={{is_default_branch}}
            type=raw,value=${{ matrix.variant.short_tag }},enable={{is_default_branch}}
            type=raw,value=${{ steps.version.outputs.version }}${{ matrix.variant.suffix }},enable=${{ steps.version.outputs.is_new_version }}
            type=raw,value=${{ steps.version.outputs.major_minor }}${{ matrix.variant.suffix }},enable=${{ steps.version.outputs.is_new_version }}
            type=sha,suffix=${{ matrix.variant.suffix }}
 
      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)
 
      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}