1 2 using namespace System.Management.Automation 3 using namespace System.Management.Automation.Language 4 5 Register-ArgumentCompleter -Native -CommandName 'my-app' -ScriptBlock { 6 param($wordToComplete, $commandAst, $cursorPosition) 7 8 $commandElements = $commandAst.CommandElements 9 $command = @( 10 'my-app' 11 for ($i = 1; $i -lt $commandElements.Count; $i++) { 12 $element = $commandElements[$i] 13 if ($element -isnot [StringConstantExpressionAst] -or 14 $element.StringConstantType -ne [StringConstantType]::BareWord -or 15 $element.Value.StartsWith('-') -or 16 $element.Value -eq $wordToComplete) { 17 break 18 } 19 $element.Value 20 }) -join ';' 21 22 $completions = @(switch ($command) { 23 'my-app' { 24 [CompletionResult]::new('-o', 'o', [CompletionResultType]::ParameterName, 'cmd option') 25 [CompletionResult]::new('-O', 'O', [CompletionResultType]::ParameterName, 'cmd option') 26 [CompletionResult]::new('--option', 'option', [CompletionResultType]::ParameterName, 'cmd option') 27 [CompletionResult]::new('--opt', 'opt', [CompletionResultType]::ParameterName, 'cmd option') 28 [CompletionResult]::new('-f', 'f', [CompletionResultType]::ParameterName, 'cmd flag') 29 [CompletionResult]::new('-F', 'F', [CompletionResultType]::ParameterName, 'cmd flag') 30 [CompletionResult]::new('--flag', 'flag', [CompletionResultType]::ParameterName, 'cmd flag') 31 [CompletionResult]::new('--flg', 'flg', [CompletionResultType]::ParameterName, 'cmd flag') 32 [CompletionResult]::new('-h', 'h', [CompletionResultType]::ParameterName, 'Print help') 33 [CompletionResult]::new('--help', 'help', [CompletionResultType]::ParameterName, 'Print help') 34 [CompletionResult]::new('-V', 'V', [CompletionResultType]::ParameterName, 'Print version') 35 [CompletionResult]::new('--version', 'version', [CompletionResultType]::ParameterName, 'Print version') 36 break 37 } 38 }) 39 40 $completions.Where{ $_.CompletionText -like "$wordToComplete*" } | 41 Sort-Object -Property ListItemText 42 } 43