mRemoteNG/.github/workflows/add_PR_2_chlog.yml

name: Update Changelog After Renovate PR Merge

on:
  # 1) Auto on pushes to your repo’s default branch (merge commits included)
  push:
    branches:
      - v1.78.2-dev

  # 2) Manual trigger
  workflow_dispatch:
    inputs:
      dryRun:
        description: 'Run without committing changes'
        required: false
        default: 'true'

jobs:
  update-changelog:
    runs-on: ubuntu-latest

    # Only proceed if…
    # - manual dispatch
    # - OR a push to default branch
    if: |
      github.event_name == 'workflow_dispatch' ||
      github.event_name == 'push'

    steps:
      - name: Checkout code
        uses: actions/checkout@v5

      - name: Check for Renovate dependency update
        id: check-renovate
        shell: bash
        run: |
          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
            echo "isRenovate=true" >> $GITHUB_OUTPUT
            exit 0
          fi
          msg="$(git log -1 --pretty=%B)"
          if echo "$msg" | grep -q 'chore(deps): update dependency'; then
            echo "isRenovate=true" >> $GITHUB_OUTPUT
          else
            echo "isRenovate=false" >> $GITHUB_OUTPUT
          fi

      - name: Abort if not a Renovate PR
        if: steps.check-renovate.outputs.isRenovate == 'false'
        run: |
          echo "ℹ️ Last commit is not a Renovate dependency update—skipping."

      - name: Parse Renovate PR info
        if: steps.check-renovate.outputs.isRenovate == 'true'
        id: extract
        shell: pwsh
        run: |
          # 1) Determine dryRun
          $dryRun = '${{ github.event.inputs.dryRun }}'
          if (-not $dryRun) { $dryRun = 'false' }
          Write-Host "🔍 dryRun = $dryRun"

          # 2) Read full commit message
          $fullMsg = git log -1 --pretty=%B
          Write-Host "📝 Commit message:"; Write-Host $fullMsg

          # 3) Extract PR number
          if ($fullMsg -match 'Merge pull request #(\d+)') {
            $prNumber = $matches[1]
          } else {
            throw "❌ Could not locate PR number in merge commit"
          }

          # 4) Extract dependency name & version
          if ($fullMsg -match 'chore\(deps\): update dependency ([\w\.\-]+) to ([\d\.]+)') {
            $depName    = $matches[1]
            $depVersion = $matches[2]
          } else {
            throw "❌ Could not parse dependency name/version"
          }

          # 5) Export outputs
          echo "pr=$prNumber"        >> $env:GITHUB_OUTPUT
          echo "depName=$depName"    >> $env:GITHUB_OUTPUT
          echo "depVersion=$depVersion" >> $env:GITHUB_OUTPUT
          echo "dryRun=$dryRun"      >> $env:GITHUB_OUTPUT

      - name: Update CHANGELOG.md
        if: steps.check-renovate.outputs.isRenovate == 'true'
        shell: pwsh
        run: |
          $path   = "$env:GITHUB_WORKSPACE/CHANGELOG.md"
          if (-not (Test-Path $path)) { throw "❌ CHANGELOG.md not found" }
          $lines  = Get-Content $path
          $pr     = '${{ steps.extract.outputs.pr }}'
          $dep    = '${{ steps.extract.outputs.depName }}'
          $ver    = '${{ steps.extract.outputs.depVersion }}'
          $entry  = "- #$pr: update dependency $dep to $ver"

          # Find latest version header: ## [x.y.z]
          $vIndex = $lines.FindIndex({ $_ -match '^## \[\d+\.\d+\.\d+\]' })
          if ($vIndex -lt 0) { throw "❌ No version header found" }

          # Locate or create "### Dependency update"
          $depIndex = -1
          for ($i = $vIndex + 1; $i -lt $lines.Count; $i++) {
            if ($lines[$i] -match '^### Dependency update') { $depIndex = $i; break }
            if ($lines[$i] -match '^## ') { break }
          }
          if ($depIndex -eq -1) {
            $lines.Insert($vIndex + 1, '### Dependency update')
            $depIndex = $vIndex + 1
          }

          # Insert the changelog entry
          $lines.Insert($depIndex + 1, $entry)
          Set-Content -Path $path -Value $lines
          Write-Host "✅ Inserted in CHANGELOG.md:"; Write-Host "   $entry"

      - name: Commit & push
        if: steps.check-renovate.outputs.isRenovate == 'true' && steps.extract.outputs.dryRun != 'true'
        run: |
          git config user.name  "github-actions"
          git config user.email "github-actions@github.com"
          git add CHANGELOG.md
          git commit -m "docs: update changelog for #${{ steps.extract.outputs.pr }}"
          git push