name: Build
on:
  pull_request:
  push:
env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ghcr.io/${{ github.repository }}
jobs:
  tests:
    strategy:
      matrix:
        os:
          - ubuntu-latest
          - macos-latest
        nix:
          - "2.20"
          - "2.24"
          - "default"
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v4.1.1

      - name: Install current Bash on macOS
        if: runner.os == 'macOS'
        run: |
          command -v brew && brew install bash || true

      - uses: DeterminateSystems/nix-installer-action@v9
        continue-on-error: true # Self-hosted runners already have Nix installed

      - name: Install Attic
        run: |
          if ! command -v attic &> /dev/null; then
            ./.github/install-attic-ci.sh
          fi

      - name: Configure Attic
        continue-on-error: true
        run: |
          : "${ATTIC_SERVER:=https://staging.attic.rs/}"
          : "${ATTIC_CACHE:=attic-ci}"
          echo ATTIC_CACHE=$ATTIC_CACHE >>$GITHUB_ENV
          export PATH=$HOME/.nix-profile/bin:$PATH # FIXME
          attic login --set-default ci "$ATTIC_SERVER" "$ATTIC_TOKEN"
          attic use "$ATTIC_CACHE"
        env:
          ATTIC_SERVER: ${{ secrets.ATTIC_SERVER }}
          ATTIC_CACHE: ${{ secrets.ATTIC_CACHE }}
          ATTIC_TOKEN: ${{ secrets.ATTIC_TOKEN }}

      - name: Cache dev shell
        run: |
          .ci/cache-shell.sh
          system=$(nix-instantiate --eval -E 'builtins.currentSystem')
          echo system=$system >>$GITHUB_ENV

      - name: Run unit tests
        run: |
          .ci/run just ci-unit-tests ${{ matrix.nix }}

      - name: Build WebAssembly crates
        if: runner.os == 'Linux'
        run: |
          .ci/run just ci-build-wasm

      # TODO: Just take a diff of the list of store paths, also abstract all of this out
      - name: Push build artifacts
        run: |
          export PATH=$HOME/.nix-profile/bin:$PATH # FIXME
          if [ -n "$ATTIC_TOKEN" ]; then
            nix build --no-link --print-out-paths -L \
              .#internalMatrix."$system".\"${{ matrix.nix }}\".attic-tests \
              .#internalMatrix."$system".\"${{ matrix.nix }}\".cargoArtifacts \
            | xargs attic push "ci:$ATTIC_CACHE"
          fi

  image:
    runs-on: ubuntu-latest
    if: github.event_name == 'push'
    needs:
      - tests
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v4.1.1

      - name: Install current Bash on macOS
        if: runner.os == 'macOS'
        run: |
          command -v brew && brew install bash || true

      - uses: DeterminateSystems/nix-installer-action@v9
        continue-on-error: true # Self-hosted runners already have Nix installed

      - name: Install Attic
        run: |
          if ! command -v attic &> /dev/null; then
            ./.github/install-attic-ci.sh
          fi

      - name: Configure Attic
        continue-on-error: true
        run: |
          : "${ATTIC_SERVER:=https://staging.attic.rs/}"
          : "${ATTIC_CACHE:=attic-ci}"
          echo ATTIC_CACHE=$ATTIC_CACHE >>$GITHUB_ENV
          export PATH=$HOME/.nix-profile/bin:$PATH # FIXME
          attic login --set-default ci "$ATTIC_SERVER" "$ATTIC_TOKEN"
          attic use "$ATTIC_CACHE"
        env:
          ATTIC_SERVER: ${{ secrets.ATTIC_SERVER }}
          ATTIC_CACHE: ${{ secrets.ATTIC_CACHE }}
          ATTIC_TOKEN: ${{ secrets.ATTIC_TOKEN }}

      - name: Cache dev shell
        run: |
          .ci/cache-shell.sh
          system=$(nix-instantiate --eval -E 'builtins.currentSystem')
          echo system=$system >>$GITHUB_ENV

      - name: Log in to the Container registry
        uses: docker/login-action@v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push container images
        continue-on-error: true
        run: |
          declare -a tags
          tags+=("${{ github.sha }}")

          branch=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
          if [[ "${{ github.ref }}" == "refs/tags/"* ]]; then
            tags+=("$(echo $branch | sed -e 's/^v//')")
          else
            tags+=("${branch}")
          fi

          if [ "$branch" == "${{ github.event.repository.default_branch }}" ]; then
            tags+=("latest")
          fi

          >&2 echo "Image: ${IMAGE_NAME}"
          >&2 echo "Tags: ${tags[@]}"

          .ci/run just ci-build-and-push-images "${IMAGE_NAME}" "${tags[@]}"

      # TODO: Just take a diff of the list of store paths, also abstract all of this out
      - name: Push build artifacts
        run: |
          export PATH=$HOME/.nix-profile/bin:$PATH # FIXME
          if [ -n "$ATTIC_TOKEN" ]; then
            nix build --no-link --print-out-paths -L \
              .#attic-server-image \
              .#attic-server-image-aarch64 \
            | xargs attic push "ci:$ATTIC_CACHE"
          fi