ci.yml

name: CI
#
# Pipeline overview
# =================
#
# Release-plz and Docker delivery are combined in one workflow because
# GITHUB_TOKEN-created tags do not trigger new workflow runs. This means a
# versioned Docker image must be built in the same run that release-plz
# creates the release, using its job outputs to pass the version through.
#

on:
  push:
    branches:
      - main
  pull_request:

jobs:

  # Release unpublished packages.
  release-plz-release:
    name: Release-plz release
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: read
      id-token: write
    outputs:
      releases_created: ${{ steps.release-plz.outputs.releases_created }}
      version: ${{ steps.parse-release.outputs.version }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          fetch-depth: 0
          persist-credentials: false
      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
      - name: Run release-plz
        id: release-plz
        uses: release-plz/action@v0.5
        with:
          command: release
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          # CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
      - name: Parse released version
        id: parse-release
        if: steps.release-plz.outputs.releases_created == 'true'
        run: |
          VERSION=$(echo '${{ steps.release-plz.outputs.releases }}' | jq -r '.[0].version')
          echo "version=$VERSION" >> $GITHUB_OUTPUT

  # Create a PR with the new versions and changelog, preparing the next release.
  release-plz-pr:
    name: Release-plz PR
    needs: release-plz-release
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    concurrency:
      group: release-plz-${{ github.ref }}
      cancel-in-progress: false
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          fetch-depth: 0
          persist-credentials: false
      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
      - name: Run release-plz
        uses: release-plz/action@v0.5
        with:
          command: release-pr
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          # CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

  # Build each platform on its native runner and push by digest (no tag yet).
  build:
    name: Build (${{ matrix.name }})
    runs-on: ${{ matrix.runner }}
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        include:
          - platform: linux/amd64
            runner: ubuntu-24.04
            name: amd64
          - platform: linux/arm64
            runner: ubuntu-24.04-arm
            name: arm64
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4
      - name: Log in to GHCR
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v7
        with:
          platforms: ${{ matrix.platform }}
          outputs: type=image,name=ghcr.io/${{ github.repository }},push-by-digest=true,name-canonical=true,push=true
      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"
      - name: Upload digest
        uses: actions/upload-artifact@v7
        with:
          name: digest-${{ matrix.name }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  # Merge platform digests into a single multi-platform manifest and apply tags.
  # - push to main (no release)  → ghcr.io/.../cryptify:edge
  # - push to main (release)     → ghcr.io/.../cryptify:edge + cryptify:0.1.3
  # - pull request               → ghcr.io/.../cryptify:pr-123
  finalize:
    name: Finalize Docker manifest
    needs: [build, release-plz-release]
    if: always() && needs.build.result == 'success'
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - name: Download digests
        uses: actions/download-artifact@v8
        with:
          path: /tmp/digests
          pattern: digest-*
          merge-multiple: true
      - name: Docker metadata
        id: meta
        uses: docker/metadata-action@v6
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            type=edge,branch=main
            type=ref,event=pr
            type=raw,value=${{ needs.release-plz-release.outputs.version }},enable=${{ needs.release-plz-release.outputs.releases_created == 'true' }}
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4
      - name: Log in to GHCR
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Create and push manifest
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create \
            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf 'ghcr.io/${{ github.repository }}@sha256:%s ' *)