release.yml

name: release

on:
  push:
    tags:
      - "v*"
  workflow_dispatch:
    inputs:
      tag:
        description: "Tag to (re)build, e.g. v0.2.0"
        required: true

permissions:
  contents: write  # required to create / upload to GitHub Releases

jobs:
  build-linux-x86_64:
    runs-on: ubuntu-latest
    env:
      TARGET: x86_64-unknown-linux-gnu

    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.inputs.tag || github.ref }}

      - name: Resolve tag
        id: tag
        run: |
          TAG="${{ github.event.inputs.tag || github.ref_name }}"
          echo "tag=$TAG" >> "$GITHUB_OUTPUT"
          echo "version=${TAG#v}" >> "$GITHUB_OUTPUT"

      - name: Verify tag matches Cargo.toml version
        run: |
          CARGO_VERSION=$(awk -F\" '/^version[[:space:]]*=/{print $2; exit}' Cargo.toml)
          if [ "$CARGO_VERSION" != "${{ steps.tag.outputs.version }}" ]; then
            echo "tag ${{ steps.tag.outputs.tag }} does not match Cargo.toml version $CARGO_VERSION" >&2
            exit 1
          fi

      - name: Install system dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y libdbus-1-dev pkg-config

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: ${{ env.TARGET }}

      - name: Build release binary
        run: cargo build --release --bin otter --target ${{ env.TARGET }}

      - name: Stage release binary
        id: package
        run: |
          mkdir -p dist
          ASSET="otter-${{ steps.tag.outputs.tag }}-${{ env.TARGET }}"
          cp target/${{ env.TARGET }}/release/otter "dist/$ASSET"
          chmod +x "dist/$ASSET"
          (cd dist && shasum -a 256 "$ASSET" > "$ASSET.sha256")
          echo "asset=$ASSET" >> "$GITHUB_OUTPUT"

      - name: Publish GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.tag.outputs.tag }}
          name: ${{ steps.tag.outputs.tag }}
          generate_release_notes: true
          files: |
            dist/${{ steps.package.outputs.asset }}
            dist/${{ steps.package.outputs.asset }}.sha256