Imported Upstream version 6.12.0.98

Former-commit-id: 066e1c5ebb0cc420bd293e60a01325420779fdd1

external/llvm-project/eng/common/darc-init.ps1

@@ -0,0 +1,47 @@
+param (
+    $darcVersion = $null,
+    $versionEndpoint = 'https://maestro-prod.westus2.cloudapp.azure.com/api/assets/darc-version?api-version=2019-01-16',
+    $verbosity = 'minimal',
+    $toolpath = $null
+)
+
+. $PSScriptRoot\tools.ps1
+
+function InstallDarcCli ($darcVersion, $toolpath) {
+  $darcCliPackageName = 'microsoft.dotnet.darc'
+
+  $dotnetRoot = InitializeDotNetCli -install:$true
+  $dotnet = "$dotnetRoot\dotnet.exe"
+  $toolList = & "$dotnet" tool list -g
+
+  if ($toolList -like "*$darcCliPackageName*") {
+    & "$dotnet" tool uninstall $darcCliPackageName -g
+  }
+
+  # 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 = $(Invoke-WebRequest -Uri $versionEndpoint -UseBasicParsing).Content
+  }
+
+  $arcadeServicesSource = 'https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/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.'
+  if (-not $toolpath) {
+    Write-Host "'$dotnet' tool install $darcCliPackageName --version $darcVersion --add-source '$arcadeServicesSource' -v $verbosity -g"
+    & "$dotnet" tool install $darcCliPackageName --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity -g
+  }else {
+    Write-Host "'$dotnet' tool install $darcCliPackageName --version $darcVersion --add-source '$arcadeServicesSource' -v $verbosity --tool-path '$toolpath'"
+    & "$dotnet" tool install $darcCliPackageName --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity --tool-path "$toolpath"
+  }
+}
+
+try {
+  InstallDarcCli $darcVersion $toolpath
+}
+catch {
+  Write-Host $_.ScriptStackTrace
+  Write-PipelineTelemetryError -Category 'Darc' -Message $_
+  ExitWithExitCode 1
+}