.github/workflows/release.yml

name: Release

on:
  push:
    tags:
      - 'v*'

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

      - name: Set up JDK 21
        uses: actions/setup-java@v4
        with:
          distribution: 'temurin'
          java-version: '21'
          cache: 'maven'

      - name: Build Indexer jar
        run: mvn -B package

      - name: Get version and pre-release status
        id: get_version
        run: |
          TAG_NAME=${GITHUB_REF#refs/tags/}
          echo "tag_name=$TAG_NAME" >> $GITHUB_OUTPUT
          # Changes file headings have no leading "v" (e.g. "0.65 2026-05-12").
          echo "version=${TAG_NAME#v}" >> $GITHUB_OUTPUT
          if [[ "$TAG_NAME" =~ (alpha|beta|rc) ]]; then
            echo "prerelease=true" >> $GITHUB_OUTPUT
          else
            echo "prerelease=false" >> $GITHUB_OUTPUT
          fi

      - name: Extract release notes from Changes
        id: changelog
        run: |
          VERSION="${{ steps.get_version.outputs.version }}"
          # Pull the section for this version: everything between the heading
          # line that starts with "<version> " and the next version heading.
          # The Changes file is authored by hand (Gerrit workflow, no PRs to
          # mine for notes).
          NOTES=$(awk -v ver="$VERSION" '
            /^[0-9]+\.[0-9]/ {
              if ($1 == ver) { flag=1; next }
              else if (flag) { exit }
            }
            flag { print }
          ' Changes)
          if [ -z "$(echo "$NOTES" | tr -d '[:space:]')" ]; then
            echo "No Changes section found for $VERSION; falling back to a generic body." >&2
            NOTES="Release ${{ steps.get_version.outputs.tag_name }}"
          fi
          {
            echo "notes<<__CHANGELOG_EOF__"
            echo "$NOTES"
            echo "__CHANGELOG_EOF__"
          } >> "$GITHUB_OUTPUT"

      - name: Create Release
        uses: softprops/action-gh-release@v2
        with:
          body: ${{ steps.changelog.outputs.notes }}
          tag_name: ${{ steps.get_version.outputs.tag_name }}
          name: ${{ steps.get_version.outputs.tag_name }}
          prerelease: ${{ steps.get_version.outputs.prerelease }}
          files: |
            target/Krill-Indexer.jar
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}