name: Release

on:
  push:
    branches: [main]
    paths: ['Cargo.toml']
  workflow_dispatch:

permissions:
  contents: write

jobs:
  check:
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.version.outputs.version }}
      tag: ${{ steps.version.outputs.tag }}
      exists: ${{ steps.exists.outputs.exists }}
    steps:
      - uses: actions/checkout@v4

      - name: Extract version from Cargo.toml
        id: version
        run: |
          VERSION=$(grep '^version' Cargo.toml | head -1 | sed 's/version = "\(.*\)"/\1/')
          echo "version=$VERSION" >> $GITHUB_OUTPUT
          echo "tag=v$VERSION" >> $GITHUB_OUTPUT

      - name: Check if release already exists
        id: exists
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          if gh release view "v${{ steps.version.outputs.version }}" &>/dev/null; then
            echo "exists=true" >> $GITHUB_OUTPUT
          else
            echo "exists=false" >> $GITHUB_OUTPUT
          fi

  build:
    needs: check
    if: needs.check.outputs.exists == 'false'
    name: Build (${{ matrix.target }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - target: x86_64-unknown-linux-gnu
            os: ubuntu-latest
            archive: tar.gz
          - target: aarch64-unknown-linux-gnu
            os: ubuntu-latest
            archive: tar.gz
            use_cross: true
          - target: x86_64-apple-darwin
            os: macos-latest
            archive: tar.gz
          - target: aarch64-apple-darwin
            os: macos-latest
            archive: tar.gz
          - target: x86_64-pc-windows-msvc
            os: windows-latest
            archive: zip

    steps:
      - uses: actions/checkout@v4

      - uses: dtolnay/rust-toolchain@stable
        with:
          targets: ${{ matrix.target }}

      - uses: Swatinem/rust-cache@v2
        with:
          key: ${{ matrix.target }}

      - name: Install cross
        if: matrix.use_cross
        run: cargo install cross --locked

      - name: Build
        run: ${{ matrix.use_cross && 'cross' || 'cargo' }} build --release --locked --target ${{ matrix.target }}

      - name: Package (Unix)
        if: matrix.archive == 'tar.gz'
        run: |
          dir="pdfdiff-${{ needs.check.outputs.tag }}-${{ matrix.target }}"
          mkdir "$dir"
          cp "target/${{ matrix.target }}/release/pdfdiff" "$dir/"
          cp readme.md LICENSE-MIT LICENSE-APACHE "$dir/"
          tar czf "$dir.tar.gz" "$dir"
          echo "ASSET=$dir.tar.gz" >> $GITHUB_ENV

      - name: Package (Windows)
        if: matrix.archive == 'zip'
        shell: pwsh
        run: |
          $dir = "pdfdiff-${{ needs.check.outputs.tag }}-${{ matrix.target }}"
          New-Item -ItemType Directory $dir
          Copy-Item "target/${{ matrix.target }}/release/pdfdiff.exe" "$dir/"
          Copy-Item readme.md, LICENSE-MIT, LICENSE-APACHE "$dir/"
          Compress-Archive -Path "$dir" -DestinationPath "$dir.zip"
          echo "ASSET=$dir.zip" >> $env:GITHUB_ENV

      - uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.target }}
          path: ${{ env.ASSET }}

  release:
    needs: [check, build]
    runs-on: ubuntu-latest
    steps:
      - uses: actions/download-artifact@v4
        with:
          path: artifacts
          merge-multiple: true

      - uses: ncipollo/release-action@v1
        with:
          tag: ${{ needs.check.outputs.tag }}
          name: ${{ needs.check.outputs.tag }}
          artifacts: "artifacts/*"
          generateReleaseNotes: true
          token: ${{ secrets.GITHUB_TOKEN }}

  publish:
    needs: release
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: dtolnay/rust-toolchain@stable

      - run: cargo publish --locked
        env:
          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
