auto-release.yml

name: Automatic Release
on:
  push:
    branches: [master, main]
defaults:
  run:
    shell: pwsh
env:
  # Because actions using `github.token` cannot trigger other workflows to occur
  GH_TOKEN: ${{ secrets.PARTICULARBOT_GITHUB_TOKEN }}
jobs:
  auto-release:
    name: Automatic Release
    # Don't run unless merging to the default branch
    if: ${{ github.ref_name == github.event.repository.default_branch }}
    runs-on: ubuntu-latest
    steps:
      # Checkout required for GitHub CLI to work
      - name: Checkout
        uses: actions/checkout@v6.0.2
        with:
          # Need history for git diff to work
          fetch-depth: 0
      - name: Determine if auto-release is necessary
        run: |
          # Script checks the diff of src/Particular.PlatformSample/Particular.PlatformSample.csproj in the latest commit, and invokes a release of the next minor if ServiceControl/ServicePulse changes
        
          echo "Comparing diff of latest commit (git diff HEAD~1 HEAD) to determine if ServiceControl/ServicePulse package was updated"
          $diff = $(git diff HEAD~1 HEAD src/Particular.PlatformSample/Particular.PlatformSample.csproj )
          
          # Grep search for lines that show an addition contianing ServiceControl/ServicePulse
          $updates = $diff | grep -E '^\+\s+<PackageReference Include="Particular\.PlatformSample\.(ServiceControl|ServicePulse)"'
          echo "Result of search for ServiceControl/ServicePulse updates in PR diff"
          echo $updates
          
          # Get number of lines
          $lines = ($updates | Measure-Object -Line).Lines

          if ($lines -eq 0) {
            echo "Nothing to release"
            exit 0
          }
          
          echo "Change to ServiceControl/ServicePulse detected, need to release"
          $tags = gh api /repos/${{ github.repository }}/tags | ConvertFrom-Json
          $latest = [Version]($tags | Where-Object name -match '^\d+\.\d+\.\d+$' | Sort-Object -Descending {[Version]$_.name} | Select-Object name)[0].name
          $nextMinor = "$($latest.Major).$($latest.Minor + 1).0"
          echo "Latest release is $latest, next release should be $nextMinor"
          echo "Tagging release of $nextMinor"
          gh api repos/Particular/Particular.PlatformSample/git/refs -f ref="refs/tags/$nextMinor" -f sha="$Env:GITHUB_SHA"
          echo "Release triggered, complete"
          exit 0