Resolve issue with fully disabled snippets (Azure#48998)

Author: scbedd

eng/scripts/Build-Snippets.ps1

@@ -18,17 +18,17 @@ Set-StrictMode -Version 4
 $TargetProjects = $ProjectNames -split ","
 $RepoRoot = Resolve-Path (Join-Path "$PSScriptRoot" ".." "..")
 
-$snippetEnabledProjects = (Get-ChildItem -Recurse "$PackageInfoFolder" *.json `
+$snippetEnabledProjects = Get-ChildItem -Recurse "$PackageInfoFolder" *.json `
 | Foreach-Object { Get-Content -Raw -Path $_.FullName | ConvertFrom-Json } `
 | Where-Object { $_.ArtifactName -in $TargetProjects -and $_.CIParameters.BuildSnippets -eq $true }
-| ForEach-Object { $_.ArtifactName }) -join ","
+| ForEach-Object { $_.ArtifactName }
 
-$scopedFile = Write-PkgInfoToDependencyGroupFile -OutputPath "$RepoRoot" -PackageInfoFolder $PackageInfoFolder -ProjectNames $snippetEnabledProjects
+if ($snippetEnabledProjects) {
+    $scopedFile = Write-PkgInfoToDependencyGroupFile -OutputPath "$RepoRoot" -PackageInfoFolder $PackageInfoFolder -ProjectNames $snippetEnabledProjects
 
-Write-Host "Writing project list to $scopedFile"
-Write-Host (Get-Content -Raw -Path $scopedFile)
+    Write-Host "Writing project list to $scopedFile"
+    Write-Host (Get-Content -Raw -Path $scopedFile)
 
-if ($snippetEnabledProjects) {
     dotnet build eng/service.proj -warnaserror `
     /t:rebuild `
     /p:DebugType=none `