Prevent the installation of the same version we have. (PowerShell#10489)

* Prevent the installation of the same version we have.

* update the buildinfo to be an aka.ms url

* convert tab to spaces

* spaces not tabs

Author: TylerLeonhardt

tools/install-powershell.ps1

@@ -244,10 +244,21 @@ try {
     [Net.ServicePointManager]::SecurityProtocol = [Net.ServicePointManager]::SecurityProtocol -bor [Net.SecurityProtocolType]::Tls12
 
     if ($Daily) {
-        $metadata = Invoke-RestMethod https://pscoretestdata.blob.core.windows.net/buildinfo/daily.json
+        $metadata = Invoke-RestMethod 'https://aka.ms/pwsh-buildinfo-daily'
         $release = $metadata.ReleaseTag -replace '^v'
         $blobName = $metadata.BlobName
 
+        # Get version from currently installed PowerShell Daily if available.
+        $pwshPath = Join-Path $Destination "pwsh"
+        $currentlyInstalledVersion = if(Test-Path $pwshPath) {
+            ((& $pwshPath -version) -split " ")[1]
+        }
+
+        if($currentlyInstalledVersion -eq $release) {
+            Write-Verbose "Latest PowerShell Daily already installed." -Verbose
+            return
+        }
+
         if ($IsWinEnv) {
             if ($UseMSI) {
                 $packageName = "PowerShell-${release}-win-${architecture}.msi"