[release/v7.7.0-preview.1] Fix changelog grab failure when only one header exists. (#27372)

jshigetomi · Justin Chung · web-flow · commit 115541af16c3 · 2026-04-28T10:23:42.000-07:00
Co-authored-by: Justin Chung &lt;chungjustin@microsoft.com&gt;
diff --git a/.pipelines/templates/release-githubNuget.yml b/.pipelines/templates/release-githubNuget.yml
@@ -89,11 +89,21 @@ jobs:
         $changelog = Get-Content -Path $filePath
   
         $headingPattern = "^## \[\d+\.\d+\.\d+"
-        $headingStartLines = $changelog | Select-String -Pattern $headingPattern | Select-Object -ExpandProperty LineNumber
+        $headingStartLines = @($changelog | Select-String -Pattern $headingPattern | Select-Object -ExpandProperty LineNumber)
+
+        if ($headingStartLines.Count -eq 0) {
+            throw "No release heading matching '$headingPattern' found in $filePath"
+        }
+
         $startLine = $headingStartLines[0]
-        $endLine = $headingStartLines[1] - 1
-  
-        $clContent = $changelog | Select-Object -Skip ($startLine-1) -First ($endLine - $startLine) | Out-String
+        if ($headingStartLines.Count -ge 2) {
+            $endLine = $headingStartLines[1] - 1
+        } else {
+            # Only one release heading present; take through end of file.
+            $endLine = $changelog.Count
+        }
+
+        $clContent = $changelog | Select-Object -Skip ($startLine-1) -First ($endLine - $startLine + 1) | Out-String
 
         $StringBuilder = [System.Text.StringBuilder]::new($clContent, $clContent.Length + 2kb)
         $StringBuilder.AppendLine().AppendLine() > $null
