name: Build

on:
  push:
    branches: [main]
    tags:
      - "v*"

  # Only run for pull requests if relevant files were changed
  pull_request:
    branches: [main]
    paths:
      - Dockerfile
      - docker-bake.hcl
      - .github/workflows/build.yaml

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

env:
  CARGO_TERM_COLOR: always
  CARGO_NET_GIT_FETCH_WITH_CLI: "true"
  SCCACHE_GHA_ENABLED: "true"
  RUSTC_WRAPPER: "sccache"
  IMAGE: ghcr.io/element-hq/matrix-authentication-service
  IMAGE_SYN2MAS: ghcr.io/element-hq/matrix-authentication-service/syn2mas
  BUILDCACHE: ghcr.io/element-hq/matrix-authentication-service/buildcache
  DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index

jobs:
  build-binaries:
    name: Build binaries
    runs-on: ubuntu-22.04

    permissions:
      contents: read

    steps:
      - name: Checkout the code
        uses: actions/checkout@v4.1.7

      - name: Setup OPA
        uses: open-policy-agent/setup-opa@v2.2.0
        with:
          version: 0.64.1

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: |
            x86_64-unknown-linux-gnu
            aarch64-unknown-linux-gnu

      - name: Setup sccache
        uses: mozilla-actions/sccache-action@v0.0.5

      - name: Install zig
        uses: goto-bus-stop/setup-zig@v2
        with:
          version: 0.13.0

      - name: Install cargo-zigbuild
        run: curl -L https://github.com/rust-cross/cargo-zigbuild/releases/download/v0.19.1/cargo-zigbuild-v0.19.1.x86_64-unknown-linux-musl.tar.gz | tar -z -x -C /usr/local/bin

      - name: Install frontend Node
        uses: actions/setup-node@v4.0.3
        with:
          node-version: 20

      - name: Install frontend Node dependencies
        working-directory: ./frontend
        run: npm ci

      - name: Build frontend
        working-directory: ./frontend
        run: npm run build

      - name: Build policies
        working-directory: ./policies
        run: make

      - name: Build the binary
        run: |
          cargo zigbuild \
            --release \
            --target x86_64-unknown-linux-gnu.2.17 \
            --target aarch64-unknown-linux-gnu.2.17 \
            --no-default-features \
            --features dist \
            -p mas-cli

      - name: Create one archive per architecture
        run: |
          for arch in x86_64 aarch64; do
            # Create one directory per architecture
            mkdir -p dist/${arch}/share/
            # Copy the artifacts to the right place
            cp policies/policy.wasm dist/${arch}/share/policy.wasm
            cp frontend/dist/manifest.json dist/${arch}/share/manifest.json
            cp -r frontend/dist/ dist/${arch}/share/assets
            cp -r templates/ dist/${arch}/share/templates
            cp -r translations/ dist/${arch}/share/translations
            cp LICENSE dist/${arch}/LICENSE
            chmod -R u=rwX,go=rX dist/${arch}/

            # Copy the binary to the right place
            cp target/${arch}-unknown-linux-gnu/release/mas-cli dist/${arch}/
            chmod u=rwx,go=rx dist/${arch}/mas-cli

            # Create the archive
            tar -czvf mas-cli-${arch}-linux.tar.gz --owner=0 --group=0 -C dist/${arch}/ .
          done

      - name: Upload the artifacts
        uses: actions/upload-artifact@v4.4.0
        with:
          name: binaries
          path: |
            mas-cli-aarch64-linux.tar.gz
            mas-cli-x86_64-linux.tar.gz

  build-image:
    name: Build and push Docker image
    runs-on: ubuntu-latest

    outputs:
      metadata: ${{ steps.output.outputs.metadata }}

    permissions:
      contents: read
      packages: write
      id-token: write

    steps:
      - name: Checkout the code
        uses: actions/checkout@v4.1.7

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5.5.1
        with:
          images: "${{ env.IMAGE }}"
          bake-target: docker-metadata-action
          flavor: |
            latest=auto
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha

      - name: Docker meta (debug variant)
        id: meta-debug
        uses: docker/metadata-action@v5.5.1
        with:
          images: "${{ env.IMAGE }}"
          bake-target: docker-metadata-action-debug
          flavor: |
            latest=auto
            suffix=-debug,onlatest=true
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha

      - name: Docker meta (syn2mas)
        id: meta-syn2mas
        uses: docker/metadata-action@v5.5.1
        with:
          images: "${{ env.IMAGE_SYN2MAS }}"
          bake-target: docker-metadata-action-syn2mas
          flavor: |
            latest=auto
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha

      - name: Setup Cosign
        uses: sigstore/cosign-installer@v3.6.0

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3.6.1
        with:
          buildkitd-config-inline: |
            [registry."docker.io"]
              mirrors = ["mirror.gcr.io"]

      - name: Login to GitHub Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3.3.0
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # For pull-requests, only read from the cache, do not try to push to the
      # cache or the image itself
      - name: Build
        uses: docker/bake-action@v5.7.0
        if: github.event_name == 'pull_request'
        with:
          files: |
            docker-bake.hcl
            ${{ steps.meta.outputs.bake-file }}
            ${{ steps.meta-debug.outputs.bake-file }}
            ${{ steps.meta-syn2mas.outputs.bake-file }}
          set: |
            base.context=https://github.com/${{ github.repository }}.git#${{ github.ref }}
            syn2mas.context=https://github.com/${{ github.repository }}.git#${{ github.ref }}:tools/syn2mas/
            base.cache-from=type=registry,ref=${{ env.BUILDCACHE }}:buildcache

      - name: Build and push
        id: bake
        uses: docker/bake-action@v5.7.0
        if: github.event_name != 'pull_request'
        with:
          files: |
            docker-bake.hcl
            ${{ steps.meta.outputs.bake-file }}
            ${{ steps.meta-debug.outputs.bake-file }}
            ${{ steps.meta-syn2mas.outputs.bake-file }}
          set: |
            base.context=https://github.com/${{ github.repository }}.git#${{ github.ref }}
            syn2mas.context=https://github.com/${{ github.repository }}.git#${{ github.ref }}:tools/syn2mas/
            base.output=type=image,push=true
            base.cache-from=type=registry,ref=${{ env.BUILDCACHE }}:buildcache
            base.cache-to=type=registry,ref=${{ env.BUILDCACHE }}:buildcache,mode=max

      - name: Transform bake output
        # This transforms the ouput to an object which looks like this:
        # { reguar: { digest: "…", tags: ["…", "…"] }, debug: { digest: "…", tags: ["…"] }, … }
        id: output
        if: github.event_name != 'pull_request'
        run: |
          echo 'metadata<<EOF' >> $GITHUB_OUTPUT
          echo '${{ steps.bake.outputs.metadata }}' | jq -c 'with_entries(select(.value | (type == "object" and has("containerimage.digest")))) | map_values({ digest: .["containerimage.digest"], tags: (.["image.name"] | split(",")) })' >> $GITHUB_OUTPUT
          echo 'EOF' >> $GITHUB_OUTPUT

      - name: Sign the images with GitHub Actions provided token
        # Only sign on tags and on commits on main branch
        if: |
          github.event_name != 'pull_request'
          && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')

        run: |-
          cosign sign --yes \
            "${{ env.IMAGE }}@${{ fromJSON(steps.output.outputs.metadata).regular.digest }}" \
            "${{ env.IMAGE }}@${{ fromJSON(steps.output.outputs.metadata).debug.digest }}" \
            "${{ env.IMAGE_SYN2MAS }}@${{ fromJSON(steps.output.outputs.metadata).syn2mas.digest }}"

  syn2mas:
    name: Release syn2mas on NPM
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write

    steps:
      - name: Checkout the code
        uses: actions/checkout@v4.1.7

      - name: Install Node
        uses: actions/setup-node@v4.0.3
        with:
          node-version-file: ./tools/syn2mas/.nvmrc

      - name: Install Node dependencies
        working-directory: ./tools/syn2mas
        run: npm ci

      - name: Publish
        uses: JS-DevTools/npm-publish@v3
        with:
          package: ./tools/syn2mas
          token: ${{ secrets.NPM_TOKEN }}
          provenance: true
          dry-run: ${{ !startsWith(github.ref, 'refs/tags/') }}

  release:
    name: Release
    if: startsWith(github.ref, 'refs/tags/')
    runs-on: ubuntu-latest
    needs:
      - build-binaries
      - build-image
      - syn2mas
    steps:
      - name: Download the artifacts from the previous job
        uses: actions/download-artifact@v4
        with:
          name: binaries
          path: artifacts

      - name: Prepare a release
        uses: softprops/action-gh-release@v2
        with:
          body: |
            ### Docker image

            Regular image:

              - Digest:
                ```
                ${{ env.IMAGE }}@${{ fromJSON(needs.build-image.outputs.metadata).regular.digest }}
                ```
              - Tags:
                ```
                ${{ join(fromJSON(needs.build-image.outputs.metadata).regular.tags, '
                ') }}
                ```

            Debug variant:

              - Digest:
                ```
                ${{ env.IMAGE }}@${{ fromJSON(needs.build-image.outputs.metadata).debug.digest }}
                ```
              - Tags:
                ```
                ${{ join(fromJSON(needs.build-image.outputs.metadata).debug.tags, '
                ') }}
                ```

            `syn2mas` migration tool:

              - Digest:
                ```
                ${{ env.IMAGE_SYN2MAS }}@${{ fromJSON(needs.build-image.outputs.metadata).syn2mas.digest }}
                ```
              - Tags:
                ```
                ${{ join(fromJSON(needs.build-image.outputs.metadata).syn2mas.tags, '
                ') }}
                ```

          files: |
            artifacts/mas-cli-aarch64-linux.tar.gz
            artifacts/mas-cli-x86_64-linux.tar.gz
          draft: true