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Optimize Windows Defender exclusion script with native PowerShell #2930 #2939

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Jul 22, 2025
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Optimize Windows Defender exclusion script with native PowerShell #2930 #2939

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14 changes: 2 additions & 12 deletions ...g.eclipse.ui.workbench/eclipseui/org/eclipse/ui/internal/WindowsDefenderConfigurator.java
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Original file line number Diff line number Diff line change
Expand Up @@ -335,21 +335,11 @@ private static boolean isWindowsDefenderActive(IProgressMonitor monitor) throws

public static String createAddExclusionsPowershellCommand(String extraSeparator) {
List<Path> paths = getExecutablePath();
// For detailed explanations about how to read existing exclusions and how to
// add new ones see:
// For detailed explanations about how to add new exclusions see:
// https://learn.microsoft.com/en-us/powershell/module/defender/add-mppreference?view=windowsserver2019-ps
// https://learn.microsoft.com/en-us/powershell/module/defender/get-mppreference?view=windowsserver2019-ps
//
// For .NET's stream API called LINQ see:
// https://learn.microsoft.com/en-us/dotnet/api/system.linq.enumerable
String excludedPaths = paths.stream().map(Path::toString).map(p -> '"' + p + '"')
.collect(Collectors.joining(',' + extraSeparator));
final String exclusionType = "ExclusionProcess"; //$NON-NLS-1$
return String.join(';' + extraSeparator, "$exclusions=@(" + extraSeparator + excludedPaths + ')', //$NON-NLS-1$
"$existingExclusions=[Collections.Generic.HashSet[String]](Get-MpPreference)." + exclusionType, //$NON-NLS-1$
"if($existingExclusions -eq $null) { $existingExclusions = New-Object Collections.Generic.HashSet[String] }", //$NON-NLS-1$
"$exclusionsToAdd=[Linq.Enumerable]::ToArray([Linq.Enumerable]::Where($exclusions,[Func[object,bool]]{param($ex)!$existingExclusions.Contains($ex)}))", //$NON-NLS-1$
"if($exclusionsToAdd.Length -gt 0){ Add-MpPreference -" + exclusionType + " $exclusionsToAdd }"); //$NON-NLS-1$ //$NON-NLS-2$
return "Add-MpPreference -ExclusionProcess " + extraSeparator + excludedPaths; //$NON-NLS-1$
}

private static void excludeDirectoryFromScanning(IProgressMonitor monitor) throws IOException {
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