Uses special formatting for PR builds

Author: stevencl840

.github/workflows/ci.yml

@@ -32,6 +32,31 @@ jobs:
           Write-Host "Short hash: $(git rev-parse --short HEAD)"
           Write-Host "Git describe: $(git describe --tags)"
           Write-Host "Branch: ${{ github.ref_name }}"
+          Write-Host "Event: ${{ github.event_name }}"
+          Write-Host "Head ref: ${{ github.head_ref }}"
+        shell: pwsh
+      - name: Set version override
+        run: |
+          # For PR builds, use the source branch name and ignore height
+          if ("${{ github.event_name }}" -eq "pull_request" -and "${{ github.head_ref }}" -ne "") {
+            $branchName = "${{ github.head_ref }}"
+            Write-Host "PR build from branch: $branchName"
+            
+            # Sanitize branch name for version (replace invalid chars with dash)
+            $branchName = $branchName -replace '[/\\]', '-'
+            $branchName = $branchName -replace '[^a-zA-Z0-9\-]', ''
+            
+            # Set the pre-release identifier
+            $preRelease = "octopus-$branchName.${{ github.run_number }}"
+            Write-Host "Setting MinVerDefaultPreReleaseIdentifiers to: $preRelease"
+            "MINVERDEFAULTPRERELEASEIDENTIFIERS=$preRelease" >> $env:GITHUB_ENV
+            
+            # Ignore height - use run number instead
+            Write-Host "Ignoring git height"
+            "MINVERIGNOHEIGHT=true" >> $env:GITHUB_ENV
+          } else {
+            Write-Host "Not a PR build - using standard MinVer behavior"
+          }
         shell: pwsh
       - name: Install .NET SDK
         uses: actions/setup-dotnet@v4.0.0