From 2aae04a6591e4345cb3bb7e167bcb669dee3a8e7 Mon Sep 17 00:00:00 2001
From: Tyler James Leonhardt <tylerl0706@gmail.com>
Date: Thu, 12 Sep 2019 11:25:30 -0700
Subject: [PATCH] Prevent the installation of the same version we have.
 (#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
---
 tools/install-powershell.ps1 | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tools/install-powershell.ps1 b/tools/install-powershell.ps1
index a09fffd67c..42d56384c0 100644
--- a/tools/install-powershell.ps1
+++ b/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"