release.yml

name: Release

on:
  push:
    tags: [ 'v*' ]

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v4

    - name: Extract changelog section
      id: changelog
      run: |
        # Match the version as a whole token: the heading carries a date after it
        # ("## v0.1.0 - 09-22-2026"), so this cannot compare the whole line, and a
        # bare prefix would hand v0.1.0's release the notes from v0.1.0-rc1.
        # "### " subheadings are body - only a "## " heading ends the section.
        VERSION_ESCAPED=$(echo "$GITHUB_REF_NAME" | sed 's/\./\\./g')
        awk "/^## ${VERSION_ESCAPED}([[:space:]]|\$)/ { p = 1; next }
             /^## / { if (p) exit }
             p" CHANGELOG.md | sed -e '/./,$!d' > release_notes.md

        # An empty slice would otherwise publish an empty release, and only be
        # noticed after the tag is pushed.
        if ! grep -q '[^[:space:]]' release_notes.md; then
          echo "::error::No CHANGELOG.md section for $GITHUB_REF_NAME" >&2
          exit 1
        fi
        echo "Release notes:"; cat release_notes.md

    - name: Package headers
      run: |
        zip -r slick-perfmon-${GITHUB_REF_NAME}.zip include/ LICENSE README.md
        tar czf slick-perfmon-${GITHUB_REF_NAME}.tar.gz include/ LICENSE README.md

    - name: Publish draft release
      uses: softprops/action-gh-release@v1
      with:
        draft: true
        body_path: release_notes.md
        files: |
          slick-perfmon-*.zip
          slick-perfmon-*.tar.gz