release.yml

name: Create Release

on:
  workflow_run:
    workflows: ["Bump Cabal Versions"]
    types:
      - completed
  workflow_dispatch:

jobs:
  release:
    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: Checkout Code
        uses: actions/checkout@v4
        with:
          # Checkout the base branch (where the version bump commit is)
          ref: ${{ github.event.workflow_run.pull_requests[0].base.ref }}
          fetch-depth: 2

      - name: Setup Haskell
        uses: haskell-actions/setup@v2
        with:
          ghc-version: '9.8.4'
          cabal-version: 'latest'

      - name: Detect Changes, Build, and Release
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          cabal update

          changed_files=$(git diff-tree --no-commit-id --name-only -r HEAD)

          echo "Files changed in last commit:"
          echo "$changed_files"

          for file in $changed_files; do
            if [[ "$file" == *".cabal" ]]; then

              version=$(grep -i "^version:" "$file" | awk '{print $2}')
              pkg_name=$(basename "$file" .cabal)
              tag="${pkg_name}-v${version}"

              echo "----------------------------------------"
              echo "Processing package: $pkg_name"
              echo "Version: $version"
              echo "Tag: $tag"

              if gh release view "$tag" > /dev/null 2>&1; then
                echo "Release $tag already exists."
              else
                echo "Creating release $tag..."
                gh release create "$tag" \
                  --title "$pkg_name v$version" \
                  --generate-notes
              fi

              # Looks for lines starting with 'executable <name>'
              executables=$(grep "^executable" "$file" | awk '{print $2}')

              if [ -z "$executables" ]; then
                echo "No executables found in $file. Skipping build."
                continue
              fi

              for exe_name in $executables; do
                echo "Building executable: $exe_name..."

                cabal build "exe:$exe_name" --enable-executable-static

                bin_path=$(cabal list-bin "exe:$exe_name")

                echo "Found binary at: $bin_path"

                echo "Uploading artifact..."
                gh release upload "$tag" "$bin_path" --clobber
              done
            fi
          done