Only install TypeSpec if code will be generated

eng/scripts/Compare-CurrentToCodegeneration.ps1

@@ -25,6 +25,19 @@ if ($Directory) {
   $path = $Directory
 }
 
+$swaggers = Get-ChildItem -Path $path -Filter "Update-Codegeneration.ps1" -Recurse
+if ($swaggers.Count -eq 0) {
+  Write-Host "
+
+  ===========================================
+  No Swagger files to regenerate
+  ===========================================
+
+  "
+  exit 0
+}
+
+
 Write-Host "
 
 ===================================
@@ -33,7 +46,7 @@ Invoking Autorest code regeneration
 
 "
 
-foreach ($script in (Get-ChildItem -Path $path -Filter "Update-Codegeneration.ps1" -Recurse)) {
+foreach ($script in $swaggers) {
   Invoke-Expression $script.FullName
 }
 

eng/scripts/TypeSpec-Compare-CurrentToCodegeneration.ps1

@@ -24,6 +24,18 @@ function Reset-Repository {
   git clean -fd .
 }
 
+$tpsYamls = Get-ChildItem -Path $Directory -Filter "tsp-location.yaml" -Recurse
+if ($tspYamls.Count -eq 0) {
+  Write-Host "
+
+  ===========================================
+  No TypeSpec files to regenerate
+  ===========================================
+
+  "
+  exit 0
+}
+
 Write-Host "
 
 ===========================================
@@ -43,7 +55,7 @@ Invoking tsp-client update
 "
 
 $failedSdk = $null
-foreach ($tspLocationPath in (Get-ChildItem -Path $Directory -Filter "tsp-location.yaml" -Recurse)) {
+foreach ($tspLocationPath in $tpsYamls) {
   $sdkPath = (get-item $tspLocationPath).Directory.FullName
   Write-Host "Generate SDK for $sdkPath"
   Push-Location