Use a better script

scripts/install-dotnet-workloads.ps1

@@ -1,12 +1,16 @@
 Param(
-  [string] $SourceUrl,
-  [string] $InstallDir,
-  [string] $Tizen = '<latest>',
-  [boolean] $IsPreview = $true
+  [string] $SourceUrl = '',
+  [string] $InstallDir = '',
+  [string] $Tizen = '',
+  [boolean] $IsPreview = $false
 )
 
 $ErrorActionPreference = 'Stop'
 
+if (!$Tizen) {
+  $Tizen = '<latest>'
+}
+
 $feed1 = 'https://api.nuget.org/v3/index.json'
 $feed2 = 'https://api.nuget.org/v3/index.json'
 $feed3 = 'https://api.nuget.org/v3/index.json'
@@ -16,21 +20,36 @@ if ($IsPreview) {
   $feed3 = 'https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet8/nuget/v3/index.json'
 }
 
+$Workloads = 'android','macos','wasm-tools','wasm-tools-net6'
+if (!$IsLinux) {
+  $Workloads += 'ios','tvos','maccatalyst','maui'
+}
+
+if ($SourceUrl) {
+  $Rollback = '--from-rollback-file',"$SourceUrl"
+} elseif ($IsPreview) {
+  Write-Error "A preview workload install was requested, but no rollback file was provided. Specify the -SourceUrl."
+  exit 1
+}
+
 Write-Host "Installing .NET workloads..."
 & dotnet workload install `
-  android ios tvos macos maccatalyst wasm-tools wasm-tools-net6 maui `
-  --from-rollback-file $SourceUrl `
+  @Workloads `
+  @Rollback `
   --source https://api.nuget.org/v3/index.json `
   --source $feed1 `
   --source $feed2 `
   --source $feed3 `
   --skip-sign-check
 
 Write-Host "Installing Tizen workloads..."
-Invoke-WebRequest 'https://raw.githubusercontent.com/Samsung/Tizen.NET/main/workload/scripts/workload-install.ps1' -OutFile 'workload-install.ps1'
-if (-not $Tizen) {
-  $Tizen = '<latest>'
+New-Item -ItemType Directory -Force './output/tmp' | Out-Null
+if ($IsLinux -or $IsMacOS) {
+  Invoke-WebRequest 'https://raw.githubusercontent.com/Samsung/Tizen.NET/main/workload/scripts/workload-install.sh' -OutFile './output/tmp/workload-install.sh'
+  bash output/tmp/workload-install.sh --version "$Tizen"
+} else {
+  Invoke-WebRequest 'https://raw.githubusercontent.com/Samsung/Tizen.NET/main/workload/scripts/workload-install.ps1' -OutFile './output/tmp/workload-install.ps1'
+  ./output/tmp/workload-install.ps1 -Version "$Tizen"
 }
-./workload-install.ps1 -Version "$Tizen"
 
 exit $LASTEXITCODE