Add more message

eng/common/scripts/get-codeowners.ps1

@@ -3,25 +3,25 @@ param (
   [string]$ToolVersion = "", # Placeholder. Will update in next PR
   [string]$ToolPath = "$env:AGENT_TOOLSDIRECTORY", # The place to check the tool existence. Put $(Agent.ToolsDirectory) as default
   [string]$DevOpsFeed = "https://pkgs.dev.azure.com/azure-sdk/public/_packaging/azure-sdk-for-net/nuget/v3/index.json", # DevOp tool feeds.
-  [string]$CodeOwnerFileLocation = "$env:SYSTEM_DEFAULTWORKINGDIRECTORY/.github/CODEOWNERS", # The place we fetch CODEOWNERS file
+  [string]$CodeOwnerFileLocation = "../../../.github/CODEOWNERS", # The place we fetch CODEOWNERS file
   [string]$VsoVariable = "" # Option of write code owners into devop variable
 )
 
-
 # Check if the retrieve-codeowners tool exsit or not.
 function InstallRetrieveCodeOwnersTool() {
   if (Get-Command "$ToolPath/retrieve-code-owners") {
     return
   }
+  Write-Warning "Installing the retrieve-code-owner tool under $ToolPath... "
   dotnet tool install --tool-path $toolPath --add-source "$DevOpsFeed" --version "$ToolVersion" "Azure.Sdk.Tools.RetrieveCodeOwners"
 }
 
 # Get the json property from tool command.
 function GetCodeOwnersEntryFromCommand() {
-  #return & "$ToolPath/retrieve-code-owners" --target-directory "$CodeOwnerPathExpression" --code-owner-file-path "$CodeOwnerFileLocation" 
-  Push-Location .\tools\code-owners-parser\Azure.Sdk.Tools.RetrieveCodeOwners\
-  dotnet run --target-directory "$CodeOwnerPathExpression" --code-owner-file-path "$CodeOwnerFileLocation"
-  Pop-Location
+  if (Get-Command "$ToolPath/retrieve-code-owners") {
+    Write-Error "The retieve-code-owners tool is not properly installed. Please check your tool path. $ToolPath"
+  }
+  return & "$ToolPath/retrieve-code-owners" --target-directory "$CodeOwnerPathExpression" --code-owner-file-path "$CodeOwnerFileLocation" 
 }
 
 function GetCodeOwners([string]$codeOwnersString) 
@@ -40,7 +40,7 @@ function GetCodeOwners([string]$codeOwnersString)
   return $codeOwners
 }
 
-#InstallRetrieveCodeOwnersTool
+InstallRetrieveCodeOwnersTool
 
 $codeOwnerToolOutput = GetCodeOwnersEntryFromCommand
 # Failed at the command of fetching code owners.