Added script to allow copying the runtime to Program Files when necessary for testing within VS.

Author: MiYanni

eng/copy-runtime.ps1

@@ -0,0 +1,28 @@
+# This script copies the downloaded runtime into the Program Files directory.
+# This is necessary in certain situations when running tests in Visual Studio.
+
+# Check if script is running as admin
+$currentPrincipal = New-Object Security.Principal.WindowsPrincipal([Security.Principal.WindowsIdentity]::GetCurrent())
+if (-not $currentPrincipal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
+  Write-Host "This script must be run as an administrator." -ForegroundColor Red
+  exit 1
+}
+
+# Read the runtime version.
+[xml]$versionPropsXml = Get-Content "$PSScriptRoot\Versions.props"
+# In XPath expression syntax, `//` means, "select the node that matches regardless of the location".
+$runtimeVersion = $versionPropsXml.SelectSingleNode("//MicrosoftNETCorePlatformsPackageVersion").InnerText
+
+# Check if the repo was built.
+$runtimeRepoPath = "$PSScriptRoot\..\.dotnet\shared\Microsoft.NETCore.App\$runtimeVersion"
+if (-not (Test-Path -Path $runtimeRepoPath)) {
+  Write-Host "The repo has not been built. Please run 'build.cmd' from the repo root." -ForegroundColor Red
+  exit 1
+}
+
+# Copy the runtime to the Program Files if it doesn't exist.
+$runtimeProgramFilesPath = "$env:ProgramFiles\dotnet\shared\Microsoft.NETCore.App\$runtimeVersion"
+if (-not (Test-Path -Path $runtimeProgramFilesPath)) {
+  Copy-Item -Path $runtimeRepoPath -Destination $runtimeProgramFilesPath -Recurse
+  Write-Host "Runtime copied to: $runtimeProgramFilesPath"
+}