name: Release

# Triggered when a version tag is pushed, e.g. `git tag v0.1.0 && git push --tags`.
# Publishes the crate to crates.io and creates a GitHub Release with prebuilt binaries.
on:
  push:
    tags:
      - "v*"

permissions:
  contents: write

jobs:
  # --- publish to crates.io -------------------------------------------------
  crates-io:
    runs-on: ubuntu-latest
    # Requires a CARGO_REGISTRY_TOKEN repo secret (Settings → Secrets → Actions).
    env:
      CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      # Skip when this version is already on crates.io — a version can never be
      # re-uploaded, so publishing one that exists (released by hand, or a re-run
      # of this job) is a guaranteed failure rather than a real problem.
      - name: Publish to crates.io
        if: ${{ env.CARGO_REGISTRY_TOKEN != '' }}
        run: |
          name=$(cargo metadata --no-deps --format-version 1 | jq -r '.packages[0].name')
          version=$(cargo metadata --no-deps --format-version 1 | jq -r '.packages[0].version')
          if curl -sf -H 'User-Agent: cortiq-gateway-release' \
               "https://crates.io/api/v1/crates/$name/$version" >/dev/null; then
            echo "$name $version is already published — skipping"
          else
            cargo publish
          fi

  # --- prebuilt binaries + GitHub Release -----------------------------------
  release:
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - os: ubuntu-latest
            target: x86_64-unknown-linux-gnu
          - os: macos-14
            target: aarch64-apple-darwin
          - os: windows-latest
            target: x86_64-pc-windows-msvc
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with:
          targets: ${{ matrix.target }}
      - uses: Swatinem/rust-cache@v2
      - name: Build
        run: cargo build --release --target ${{ matrix.target }}
      - name: Package
        shell: bash
        run: |
          bin=cortiq-gateway
          [ "${{ runner.os }}" = "Windows" ] && bin=cortiq-gateway.exe
          staging="cortiq-gateway-${{ github.ref_name }}-${{ matrix.target }}"
          mkdir "$staging"
          cp "target/${{ matrix.target }}/release/$bin" "$staging"/
          cp README.md LICENSE config/gateway.example.toml "$staging"/
          if [ "${{ runner.os }}" = "Windows" ]; then
            7z a "$staging.zip" "$staging" >/dev/null
            echo "ASSET=$staging.zip" >> "$GITHUB_ENV"
          else
            tar czf "$staging.tar.gz" "$staging"
            echo "ASSET=$staging.tar.gz" >> "$GITHUB_ENV"
          fi
      - name: Release
        uses: softprops/action-gh-release@v2
        with:
          files: ${{ env.ASSET }}
          generate_release_notes: true