release.yaml

on:
  push:
    branches: [CRAN]

name: release

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest
    env:
      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          fetch-tags: true

      - name: Collect tags at pushed commit
        id: tags
        run: |
          tags=$(git tag --points-at HEAD)
          {
            echo "tags<<EOF"
            echo "$tags"
            echo "EOF"
          } >> "$GITHUB_OUTPUT"
          if [ -z "$tags" ]; then
            echo "No tags point at HEAD; nothing to release."
          fi

      - name: Create releases from NEWS.md
        if: steps.tags.outputs.tags != ''
        env:
          TAGS: ${{ steps.tags.outputs.tags }}
        run: |
          set -euo pipefail
          while IFS= read -r tag; do
            [ -z "$tag" ] && continue
            version="${tag#v}"
            notes=$(awk -v ver="$version" '
              /^# version / {
                if (found) exit
                if ($3 == ver) { found = 1; next }
              }
              found { print }
            ' NEWS.md)
            if [ -z "$(printf "%s" "$notes" | tr -d "[:space:]")" ]; then
              echo "::warning::No NEWS.md entry matched version $version; release body will be empty."
            fi
            if gh release view "$tag" >/dev/null 2>&1; then
              echo "Release $tag already exists; skipping."
              continue
            fi
            printf "%s" "$notes" | gh release create "$tag" \
              --title "$tag" \
              --notes-file -
          done <<< "$TAGS"