Imported Upstream version 6.4.0.137

Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6

external/linker/eng/common/darc-init.ps1

@@ -1,5 +1,6 @@
 param (
-    $darcVersion = $null
+    $darcVersion = $null,
+    $versionEndpoint = "https://maestro-prod.westus2.cloudapp.azure.com/api/assets/darc-version?api-version=2019-01-16"
 )
 
 $verbosity = "m"
@@ -10,23 +11,23 @@ function InstallDarcCli ($darcVersion) {
 
   $dotnetRoot = InitializeDotNetCli -install:$true
   $dotnet = "$dotnetRoot\dotnet.exe"
-  $toolList = Invoke-Expression "& `"$dotnet`" tool list -g"
+  $toolList = & "$dotnet" tool list -g
 
   if ($toolList -like "*$darcCliPackageName*") {
-    Invoke-Expression "& `"$dotnet`" tool uninstall $darcCliPackageName -g"
+    & "$dotnet" tool uninstall $darcCliPackageName -g
   }
 
-  # Until we can anonymously query the BAR API for the latest arcade-services
-  # build applied to the PROD channel, this is hardcoded.
+  # If the user didn't explicitly specify the darc version,
+  # query the Maestro API for the correct version of darc to install.
   if (-not $darcVersion) {
-    $darcVersion = '1.1.0-beta.19115.5'
+    $darcVersion = $(Invoke-WebRequest -Uri $versionEndpoint -UseBasicParsing).Content
   }
-  
-  $arcadeServicesSource = 'https://dotnetfeed.blob.core.windows.net/dotnet-arcade/index.json'
+
+  $arcadeServicesSource = 'https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json'
 
   Write-Host "Installing Darc CLI version $darcVersion..."
   Write-Host "You may need to restart your command window if this is the first dotnet tool you have installed."
-  Invoke-Expression "& `"$dotnet`" tool install $darcCliPackageName --version $darcVersion --add-source '$arcadeServicesSource' -v $verbosity -g"
+  & "$dotnet" tool install $darcCliPackageName --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity -g
 }
 
 InstallDarcCli $darcVersion