From f6b39b022e8a16d560b50c6616a8cbab47fdccd2 Mon Sep 17 00:00:00 2001
From: Feodor Fitsner <feodor@appveyor.com>
Date: Tue, 28 Jul 2020 09:33:17 -0700
Subject: [PATCH] Create rollback-yarn-1.10.0.ps1

---
 scripts/rollback-yarn-1.10.0.ps1 | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 scripts/rollback-yarn-1.10.0.ps1

diff --git a/scripts/rollback-yarn-1.10.0.ps1 b/scripts/rollback-yarn-1.10.0.ps1
new file mode 100644
index 0000000..3ebc7ca
--- /dev/null
+++ b/scripts/rollback-yarn-1.10.0.ps1
@@ -0,0 +1,32 @@
+function GetUninstallString($productName) {
+    $x64items = @(Get-ChildItem "HKLM:SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall")
+    ($x64items + @(Get-ChildItem "HKLM:SOFTWARE\wow6432node\Microsoft\Windows\CurrentVersion\Uninstall") `
+        | ForEach-object { Get-ItemProperty Microsoft.PowerShell.Core\Registry::$_ } `
+        | Where-Object { $_.DisplayName -and $_.DisplayName.Contains($productName) } `
+        | Select UninstallString).UninstallString
+}
+
+$uninstallCommand = GetUninstallString "Yarn"
+
+if ($uninstallCommand) {
+    Write-Host "Uninstalling existing installation of Yarn ..." -ForegroundColor Cyan
+
+    $uninstallCommand = $uninstallCommand.replace('MsiExec.exe /I{', '/x{').replace('MsiExec.exe /X{', '/x{')
+    cmd /c start /wait msiexec.exe $uninstallCommand /quiet
+
+    Write-Host "Uninstalled" -ForegroundColor Green
+}
+
+Write-Host "Installing Yarn..." -ForegroundColor Cyan
+$msiPath = "$($env:TEMP)\yarn.msi"
+
+Write-Host "Downloading..."
+(New-Object Net.WebClient).DownloadFile('https://github.com/yarnpkg/yarn/releases/download/v1.10.0/yarn-1.10.0.msi', $msiPath)
+
+Write-Host "Installing..."
+cmd /c start /wait msiexec /i $msiPath /quiet /qn
+del $msiPath
+
+Write-Host "Yarn installed" -ForegroundColor Green
+
+yarn --version