build: choco: add chocolateyUninstall.ps1

build/choco/chocolateyUninstall.ps1

@@ -0,0 +1,36 @@
+$ErrorActionPreference = 'Stop';
+
+$packageName = 'winfsp'
+$softwareName = 'WinFsp*'
+$installerType = 'msi'
+$silentArgs = '/qn /norestart'
+$validExitCodes = @(0, 3010, 1605, 1614, 1641)
+
+[array]$key = Get-UninstallRegistryKey -SoftwareName $softwareName
+
+if ($key.Count -eq 1) {
+    $key | % {
+        # The Product Code GUID is all that should be passed for MSI, and very
+        # FIRST, because it comes directly after /x, which is already set in the
+        # Uninstall-ChocolateyPackage msiargs (facepalm).
+        $silentArgs = "$($_.PSChildName) $silentArgs"
+
+        # Don't pass anything for file, it is ignored for msi (facepalm number 2)
+        # Alternatively if you need to pass a path to an msi, determine that and
+        # use it instead of the above in silentArgs, still very first
+        $file = ''
+
+        Uninstall-ChocolateyPackage `
+            -PackageName $packageName `
+            -FileType $installerType `
+            -SilentArgs "$silentArgs" `
+            -ValidExitCodes $validExitCodes `
+            -File "$file"
+    }
+} elseif ($key.Count -eq 0) {
+    Write-Warning "$packageName has already been uninstalled by other means."
+} elseif ($key.Count -gt 1) {
+    Write-Warning "Too many matching packages found! Package may not be uninstalled."
+    Write-Warning "Please alert package maintainer the following packages were matched:"
+    $key | % {Write-Warning "- $_"}
+}

build/choco/winfsp.nuspec

@@ -41,6 +41,7 @@ Some of the benefits of using WinFsp are listed below:
 
     <files>
         <file src="chocolateyInstall.ps1" target="tools" />
+        <file src="chocolateyUninstall.ps1" target="tools" />
         <file src="winfsp-$version$.msi" target="tools" />
     </files>
 </package>