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('--single-quotes', 'single-quotes', [CompletionResultType]::ParameterName, 'Can be ''always'', ''auto'', or ''never''') 25 [CompletionResult]::new('--double-quotes', 'double-quotes', [CompletionResultType]::ParameterName, 'Can be "always", "auto", or "never"') 26 [CompletionResult]::new('--backticks', 'backticks', [CompletionResultType]::ParameterName, 'For more information see `echo test`') 27 [CompletionResult]::new('--backslash', 'backslash', [CompletionResultType]::ParameterName, 'Avoid ''\n''') 28 [CompletionResult]::new('--brackets', 'brackets', [CompletionResultType]::ParameterName, 'List packages [filter]') 29 [CompletionResult]::new('--expansions', 'expansions', [CompletionResultType]::ParameterName, 'Execute the shell command with $SHELL') 30 [CompletionResult]::new('-h', 'h', [CompletionResultType]::ParameterName, 'Print help') 31 [CompletionResult]::new('--help', 'help', [CompletionResultType]::ParameterName, 'Print help') 32 [CompletionResult]::new('-V', 'V', [CompletionResultType]::ParameterName, 'Print version') 33 [CompletionResult]::new('--version', 'version', [CompletionResultType]::ParameterName, 'Print version') 34 [CompletionResult]::new('cmd-single-quotes', 'cmd-single-quotes', [CompletionResultType]::ParameterValue, 'Can be ''always'', ''auto'', or ''never''') 35 [CompletionResult]::new('cmd-double-quotes', 'cmd-double-quotes', [CompletionResultType]::ParameterValue, 'Can be "always", "auto", or "never"') 36 [CompletionResult]::new('cmd-backticks', 'cmd-backticks', [CompletionResultType]::ParameterValue, 'For more information see `echo test`') 37 [CompletionResult]::new('cmd-backslash', 'cmd-backslash', [CompletionResultType]::ParameterValue, 'Avoid ''\n''') 38 [CompletionResult]::new('cmd-brackets', 'cmd-brackets', [CompletionResultType]::ParameterValue, 'List packages [filter]') 39 [CompletionResult]::new('cmd-expansions', 'cmd-expansions', [CompletionResultType]::ParameterValue, 'Execute the shell command with $SHELL') 40 [CompletionResult]::new('help', 'help', [CompletionResultType]::ParameterValue, 'Print this message or the help of the given subcommand(s)') 41 break 42 } 43 'my-app;cmd-single-quotes' { 44 [CompletionResult]::new('-h', 'h', [CompletionResultType]::ParameterName, 'Print help') 45 [CompletionResult]::new('--help', 'help', [CompletionResultType]::ParameterName, 'Print help') 46 break 47 } 48 'my-app;cmd-double-quotes' { 49 [CompletionResult]::new('-h', 'h', [CompletionResultType]::ParameterName, 'Print help') 50 [CompletionResult]::new('--help', 'help', [CompletionResultType]::ParameterName, 'Print help') 51 break 52 } 53 'my-app;cmd-backticks' { 54 [CompletionResult]::new('-h', 'h', [CompletionResultType]::ParameterName, 'Print help') 55 [CompletionResult]::new('--help', 'help', [CompletionResultType]::ParameterName, 'Print help') 56 break 57 } 58 'my-app;cmd-backslash' { 59 [CompletionResult]::new('-h', 'h', [CompletionResultType]::ParameterName, 'Print help') 60 [CompletionResult]::new('--help', 'help', [CompletionResultType]::ParameterName, 'Print help') 61 break 62 } 63 'my-app;cmd-brackets' { 64 [CompletionResult]::new('-h', 'h', [CompletionResultType]::ParameterName, 'Print help') 65 [CompletionResult]::new('--help', 'help', [CompletionResultType]::ParameterName, 'Print help') 66 break 67 } 68 'my-app;cmd-expansions' { 69 [CompletionResult]::new('-h', 'h', [CompletionResultType]::ParameterName, 'Print help') 70 [CompletionResult]::new('--help', 'help', [CompletionResultType]::ParameterName, 'Print help') 71 break 72 } 73 'my-app;help' { 74 [CompletionResult]::new('cmd-single-quotes', 'cmd-single-quotes', [CompletionResultType]::ParameterValue, 'Can be ''always'', ''auto'', or ''never''') 75 [CompletionResult]::new('cmd-double-quotes', 'cmd-double-quotes', [CompletionResultType]::ParameterValue, 'Can be "always", "auto", or "never"') 76 [CompletionResult]::new('cmd-backticks', 'cmd-backticks', [CompletionResultType]::ParameterValue, 'For more information see `echo test`') 77 [CompletionResult]::new('cmd-backslash', 'cmd-backslash', [CompletionResultType]::ParameterValue, 'Avoid ''\n''') 78 [CompletionResult]::new('cmd-brackets', 'cmd-brackets', [CompletionResultType]::ParameterValue, 'List packages [filter]') 79 [CompletionResult]::new('cmd-expansions', 'cmd-expansions', [CompletionResultType]::ParameterValue, 'Execute the shell command with $SHELL') 80 [CompletionResult]::new('help', 'help', [CompletionResultType]::ParameterValue, 'Print this message or the help of the given subcommand(s)') 81 break 82 } 83 'my-app;help;cmd-single-quotes' { 84 break 85 } 86 'my-app;help;cmd-double-quotes' { 87 break 88 } 89 'my-app;help;cmd-backticks' { 90 break 91 } 92 'my-app;help;cmd-backslash' { 93 break 94 } 95 'my-app;help;cmd-brackets' { 96 break 97 } 98 'my-app;help;cmd-expansions' { 99 break 100 } 101 'my-app;help;help' { 102 break 103 } 104 }) 105 106 $completions.Where{ $_.CompletionText -like "$wordToComplete*" } | 107 Sort-Object -Property ListItemText 108 } 109