release.yml

---
name: Release

on:
  push:
    branches:
      - master
    paths:
      - pom.xml
      - src/**

permissions:
  contents: write

jobs:
  release:
    name: Release
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up JDK 11
        uses: actions/setup-java@v4
        with:
          java-version: '11'
          distribution: temurin
          cache: maven

      - name: Extract project version
        id: project
        run: echo "version=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)" >> "$GITHUB_OUTPUT"

      - name: Check if release already exists
        id: release_check
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          if gh release view "${{ steps.project.outputs.version }}" >/dev/null 2>&1; then
            echo "exists=true" >> "$GITHUB_OUTPUT"
            echo "Release ${{ steps.project.outputs.version }} already exists; skipping."
          else
            echo "exists=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Build with Maven
        if: steps.release_check.outputs.exists == 'false'
        run: mvn clean package -DskipTests

      - name: Publish Release
        if: steps.release_check.outputs.exists == 'false'
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.project.outputs.version }}
          name: WHIMC-ScienceTools-${{ steps.project.outputs.version }}
          body: Release for v${{ steps.project.outputs.version }}
          files: target/WHIMC-ScienceTools-*.jar
          generate_release_notes: true
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}