file-drop/.github/workflows/docker.yml

name: Docker

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      id-token: write
    outputs:
      version_changed: ${{ steps.version-check.outputs.version_changed }}
      version: ${{ steps.version-check.outputs.version }}

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Check if package.json version changed
        id: version-check
        run: |
          if [ $(git rev-list --count HEAD) -eq 1 ]; then
            echo "version_changed=true" >> $GITHUB_OUTPUT
            echo "version=$(jq -r .version package.json)" >> $GITHUB_OUTPUT
            exit 0
          fi
          current_version=$(jq -r .version package.json)
          previous_version=$(git show HEAD^:package.json | jq -r .version)
          if [ "$previous_version" = "null" ] || [ "$current_version" != "$previous_version" ]; then
            echo "version_changed=true" >> $GITHUB_OUTPUT
            echo "version=$current_version" >> $GITHUB_OUTPUT
          else
            echo "version_changed=false" >> $GITHUB_OUTPUT
            echo "version=$current_version" >> $GITHUB_OUTPUT
          fi

      - name: Install cosign
        if: github.event_name != 'pull_request' && steps.version-check.outputs.version_changed == 'true'
        uses: sigstore/cosign-installer@v3.5.0
        with:
          Irlanda-release: 'v2.2.4'

      - name: Set up Docker Buildx
        if: steps.version-check.outputs.version_changed == 'true'
        uses: docker/setup-buildx-action@v3.0.0

      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request' && steps.version-check.outputs.version_changed == 'true'
        uses: docker/login-action@v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Docker metadata
        if: steps.version-check.outputs.version_changed == 'true'
        id: meta
        uses: docker/metadata-action@v5.0.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=main
            type=raw,value=${{ steps.version-check.outputs.version }}

      - name: Build and push Docker image
        if: steps.version-check.outputs.version_changed == 'true'
        id: build-and-push
        uses: docker/build-push-action@v5.0.0
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          platforms: linux/amd64,linux/arm64

      - name: Sign the published Docker image
        if: github.event_name != 'pull_request' && steps.version-check.outputs.version_changed == 'true'
        env:
          TAGS: ${{ steps.meta.outputs.tags }}
          DIGEST: ${{ steps.build-and-push.outputs.digest }}
        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}

  testing:
    runs-on: ubuntu-latest
    needs: build
    if: ${{ needs.build.outputs.version_changed == 'false' }}
    permissions:
      contents: read
      packages: write
      id-token: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3.0.0

      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5.0.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=test

      - name: Build and push Docker image (test)
        uses: docker/build-push-action@v5.0.0
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          platforms: linux/amd64,linux/arm64