Merged PR 599407: Add Azure Artifacts Credential Provider

Use the [azure artifacts provider binaries](https://github.com/microsoft/artifacts-credprovider) for Part B pipeline.

Related work items: #1819575

RunCheckInTestsWithPAT.ps1

@@ -10,8 +10,13 @@
  [Parameter(mandatory=$true)]
  [String]$args
 )
-[Environment]::SetEnvironmentVariable("1ESSHAREDASSETS_BUILDXL_FEED_PAT", $1esPat, "Process")
-[Environment]::SetEnvironmentVariable("CLOUDBUILD_BUILDXL_SELFHOST_FEED_PAT", $cbPat, "Process")
 [Environment]::SetEnvironmentVariable("MSENG_GIT_PAT", $msEngGitPat, "Process")
-[Environment]::SetEnvironmentVariable("NUGET_CREDENTIALPROVIDERS_PATH", $ncPath, "Process")
+[Environment]::SetEnvironmentVariable("VSS_NUGET_EXTERNAL_FEED_ENDPOINTS", "
+{
+    'endpointCredentials': [
+        {'endpoint':'https://pkgs.dev.azure.com/1essharedassets/_packaging/BuildXL/nuget/v3/index.json', 'password':'$1esPat'}, 
+        {'endpoint':'https://pkgs.dev.azure.com/cloudbuild/_packaging/BuildXL.Selfhost/nuget/v3/index.json', 'password':'$cbPat'}
+    ]
+}", "Process")
+
 .\RunCheckInTests.cmd /lab $args /internal

Shared/Scripts/Init.cmd

@@ -86,6 +86,9 @@ REM *********************************
 		exit /b 1
 	)
 
+	REM Install latest Azure Artifacts Credentials Provider (https://github.com/microsoft/artifacts-credprovider)
+	powershell -Command "iex ""& { $(irm https://aka.ms/install-artifacts-credprovider.ps1) } -AddNetfx"""
+
 	set _BUILDXL_BOOTSTRAP_OUT=%ENLISTMENTROOT%\Out\BootStrap
 
 	REM use nuget to pull the current LKG down
@@ -108,11 +111,6 @@ REM *********************************
 	set BUILDXL_LKG_FEED_1=
 	set _BUILDXL_INIT_HASH=%_BUILDXL_INIT_HASH_NEW%
 	
-	REM We'll conditionally set the credential provider if not set on the machine.
-	REM If not set we will set it to the local one in the enlistment but iwth the b-drive substitution
-	if NOT DEFINED NUGET_CREDENTIALPROVIDERS_PATH (
-		set NUGET_CREDENTIALPROVIDERS_PATH=%TOOLROOT%
-	)
 	goto :EOF
 
 

Shared/Scripts/bxl.ps1

@@ -541,9 +541,7 @@ Log -NoNewline "Building using the ";
 Log-Emphasis -NoNewline $($useDeployment.description)
 Log " version of BuildXL.";
 
-$Nuget_CredentialProviders_Path = [Environment]::GetEnvironmentVariable("NUGET_CREDENTIALPROVIDERS_PATH");
-
-$AdditionalBuildXLArguments += "/environment:$($useDeployment.telemetryEnvironment) /unsafe_GlobalUntrackedScopes:$Nuget_CredentialProviders_Path /unsafe_GlobalPassthroughEnvVars:NUGET_CREDENTIALPROVIDERS_PATH";
+$AdditionalBuildXLArguments += "/environment:$($useDeployment.telemetryEnvironment)";
 
 $GenerateCgManifestFilePath = "$NormalizationDrive\cg\nuget\cgmanifest.json";
 $AdditionalBuildXLArguments += "/generateCgManifestForNugets:$GenerateCgManifestFilePath";