check-version-bump.yml

name: Check version bump
on:
  pull_request:
    branches: [main]

jobs:
  check-version:
    if: github.head_ref == 'dev'
    runs-on: ubuntu-latest

    steps:
      - name: Checkout PR branch
        uses: actions/checkout@v5

      - name: Get PR version
        id: pr
        shell: pwsh
        run: |
          # Prefer Directory.Build.props; fall back to App.csproj for branches that
          # predate the version-unification refactor (PR #315).
          $ddb = 'src/Directory.Build.props'
          $app = 'src/PlanViewer.App/PlanViewer.App.csproj'
          $path = if (Test-Path $ddb) { $ddb } else { $app }
          $version = ([xml](Get-Content $path)).Project.PropertyGroup.Version | Where-Object { $_ }
          echo "VERSION=$version" >> $env:GITHUB_OUTPUT
          Write-Host "PR version: $version (from $path)"

      - name: Checkout main
        uses: actions/checkout@v5
        with:
          ref: main
          path: main-branch

      - name: Get main version
        id: main
        shell: pwsh
        run: |
          $ddb = 'main-branch/src/Directory.Build.props'
          $app = 'main-branch/src/PlanViewer.App/PlanViewer.App.csproj'
          $path = if (Test-Path $ddb) { $ddb } else { $app }
          $version = ([xml](Get-Content $path)).Project.PropertyGroup.Version | Where-Object { $_ }
          echo "VERSION=$version" >> $env:GITHUB_OUTPUT
          Write-Host "Main version: $version (from $path)"

      - name: Compare versions
        env:
          PR_VERSION: ${{ steps.pr.outputs.VERSION }}
          MAIN_VERSION: ${{ steps.main.outputs.VERSION }}
        run: |
          echo "Main version: $MAIN_VERSION"
          echo "PR version:   $PR_VERSION"
          if [ "$PR_VERSION" == "$MAIN_VERSION" ]; then
            echo "::error::Version ($PR_VERSION) has not changed from main. Bump the version before merging to main."
            exit 1
          fi
          echo "✅ Version bumped: $MAIN_VERSION → $PR_VERSION"