release.yml

name: Build and Publish Release
on:
  push:
    branches:
      - main  # Change this to 'master' or another branch name as desired.
    
jobs:
  release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4

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

      - name: Build with Maven
        run: mvn clean package

      - name: Get version & release name
        id: version
        run: |
          # Extract the project version from your Maven POM.
          echo "version=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)" >> $GITHUB_OUTPUT
          # Here we extract the project name as the release name.
          echo "releaseName=$(mvn help:evaluate -Dexpression=project.name -q -DforceStdout)" >> $GITHUB_OUTPUT
      
      - name: Print version & release name
        run: |
          echo "Version: ${{ steps.version.outputs.version }}"
          echo "Release Name: ${{ steps.version.outputs.releaseName }}"

      - name: Create an empty CHANGELOG.md if missing
        run: |
          if [ ! -f CHANGELOG.md ]; then
            touch CHANGELOG.md
          fi

      - name: Remove all lines after the 2nd title in CHANGELOG.md
        shell: pwsh
        run: |
          $changelogPath = "CHANGELOG.md"
          $content = Get-Content -Path $changelogPath
          $indices = ($content | ForEach-Object { $_ } | Select-String -Pattern "^#" | ForEach-Object { $_.LineNumber - 1 })

          if ($indices.Count -ge 2) {
              $startIndex = $indices[0]
              $endIndex = $indices[1]

              $changes = $content[$startIndex..($endIndex - 1)]
              $changes = $changes | Where-Object { -not [string]::IsNullOrWhiteSpace($_) }
              $changes -join "`n" | Set-Content -Path $changelogPath
              Write-Output "Changelog updated"
          } else {
              Write-Output "Not as many lines as expected"
          }

      - name: Create Release
        id: createRelease
        uses: ncipollo/release-action@v1.14.0
        with:
          allowUpdates: true
          updateOnlyUnreleased: true
          # Adjust the artifact path; Maven outputs your JAR into the target directory.
          artifacts: target/*.jar
          token: ${{ secrets.GITHUB_TOKEN }}
          tag: ${{ steps.version.outputs.version }}
          name: ${{ steps.version.outputs.releaseName }}
          bodyFile: CHANGELOG.md
          skipIfReleaseExists: true