using namespace System.Management.Automation using namespace System.Management.Automation.Language Register-ArgumentCompleter -Native -CommandName 'sync' -ScriptBlock { param($wordToComplete, $commandAst, $cursorPosition) $commandElements = $commandAst.CommandElements $command = @( 'sync' for ($i = 1; $i -lt $commandElements.Count; $i++) { $element = $commandElements[$i] if ($element -isnot [StringConstantExpressionAst] -or $element.StringConstantType -ne [StringConstantType]::BareWord -or $element.Value.StartsWith('-') -or $element.Value -eq $wordToComplete) { break } $element.Value }) -join ';' $completions = @(switch ($command) { 'sync' { [CompletionResult]::new('-d', 'd', [CompletionResultType]::ParameterName, 'sync only file data, no unneeded metadata') [CompletionResult]::new('--data', 'data', [CompletionResultType]::ParameterName, 'sync only file data, no unneeded metadata') [CompletionResult]::new('-f', 'f', [CompletionResultType]::ParameterName, 'sync the file systems that contain the files') [CompletionResult]::new('--file-system', 'file-system', [CompletionResultType]::ParameterName, 'sync the file systems that contain the files') [CompletionResult]::new('-h', 'h', [CompletionResultType]::ParameterName, 'Print help') [CompletionResult]::new('--help', 'help', [CompletionResultType]::ParameterName, 'Print help') [CompletionResult]::new('-V', 'V', [CompletionResultType]::ParameterName, 'Print version') [CompletionResult]::new('--version', 'version', [CompletionResultType]::ParameterName, 'Print version') break } }) $completions.Where{ $_.CompletionText -like "$wordToComplete*" } | Sort-Object -Property ListItemText }