completers/dirname_completer/dirname_completer.ps1
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# dirname tab completion for PowerShell # Static option completion for dirname.exe and dirname. Set-StrictMode -Version 2.0 function Get-DirnameCompletionOptions { $cache = Get-Variable -Name 'DirnameCompletionOptions' -Scope Script -ErrorAction Ignore if ($null -ne $cache -and $null -ne $cache.Value) { return $cache.Value } $fallbackOptions = @('-z', '--zero', '--help', '--version') $commandCandidates = @('dirname.exe', 'dirname') foreach ($candidate in $commandCandidates) { $command = Get-Command -Name $candidate -ErrorAction Ignore if ($null -eq $command) { continue } try { $helpOutput = $null | & $command.Source --help 2>&1 | ForEach-Object { $_ -replace '\e\[[0-9;?]*[ -/]*[@-~]', '' } | Out-String } catch { continue } if ([string]::IsNullOrWhiteSpace($helpOutput)) { continue } $options = [System.Collections.Generic.HashSet[string]]::new([System.StringComparer]::Ordinal) $descriptions = [System.Collections.Hashtable]::new([System.StringComparer]::Ordinal) foreach ($line in ([regex]::Split($helpOutput, '\r?\n'))) { foreach ($match in [regex]::Matches($line, '(?<!\S)(--?[A-Za-z0-9][A-Za-z0-9-]*)(?=(\s|,|=|\[|$))')) { $rawOption = $match.Groups[1].Value $normalized = $rawOption.Trim() if ($normalized.StartsWith('--')) { $normalized = $normalized -replace '\[.*$', '' $normalized = $normalized -replace '=.*$', '' } if ($normalized -match '^-{1,2}[A-Za-z0-9][A-Za-z0-9-]*$') { [void]$options.Add($normalized) if (-not $descriptions.ContainsKey($normalized)) { $description = ($line -replace '^\s*(?:-{1,2}[A-Za-z0-9][A-Za-z0-9-]*(?:[=\[]\S*)?[,\s]+)+', '').Trim() if ($description -and $description -ne $line.Trim()) { $descriptions[$normalized] = $description } } } } } if ($options.Count -gt 0) { Set-Variable -Name 'DirnameCompletionOptions' -Value (@($options | Sort-Object)) -Scope Script Set-Variable -Name 'DirnameCompletionDescriptions' -Value $descriptions -Scope Script return (Get-Variable -Name 'DirnameCompletionOptions' -Scope Script).Value } } Set-Variable -Name 'DirnameCompletionOptions' -Value $fallbackOptions -Scope Script return (Get-Variable -Name 'DirnameCompletionOptions' -Scope Script).Value } function New-DirnameCompletionResult { param( [string]$CompletionText, [string]$ResultType, [string]$ToolTip, [string]$ListItemText ) if ([string]::IsNullOrWhiteSpace($ListItemText)) { $ListItemText = $CompletionText } if ([string]::IsNullOrWhiteSpace($ToolTip)) { $ToolTip = $CompletionText } [System.Management.Automation.CompletionResult]::new( $CompletionText, $ListItemText, $ResultType, $ToolTip ) } function Remove-DirnameOuterQuotes { param([string]$Value) if ($null -eq $Value) { return '' } $Value.Trim([char[]]@([char]34, [char]39)) } function ConvertTo-DirnameQuotedValue { param( [string]$Value, [string]$QuoteChar = '' ) if ([string]::IsNullOrWhiteSpace($Value)) { return $Value } if ($QuoteChar -eq "'") { return "'" + $Value.Replace("'", "''") + "'" } if ($QuoteChar -eq '"' -or $Value -match '\s') { $escaped = $Value.Replace('`', '``').Replace('"', '`"').Replace('$', '`$') return '"' + $escaped + '"' } $Value } function Get-DirnameCurrentToken { param( [System.Management.Automation.Language.CommandAst]$CommandAst, [int]$CursorPosition, [string]$Fallback ) $elements = $CommandAst.CommandElements for ($i = 1; $i -lt $elements.Count; $i++) { $extent = $elements[$i].Extent if ($extent.StartOffset -lt $CursorPosition -and $CursorPosition -le $extent.EndOffset) { return $extent.Text.Substring(0, $CursorPosition - $extent.StartOffset) } } $Fallback } function Get-DirnamePathCompletions { param([string]$InputPath) $cleanInput = Remove-DirnameOuterQuotes -Value $InputPath $quoteChar = if (-not [string]::IsNullOrEmpty($InputPath) -and ($InputPath.StartsWith('"') -or $InputPath.StartsWith("'"))) { $InputPath.Substring(0, 1) } else { '' } if ([string]::IsNullOrWhiteSpace($cleanInput)) { $parent = '.' $leaf = '' } elseif ($cleanInput -match '[\\/]+$') { $parent = $cleanInput $leaf = '' } else { $parent = Split-Path -Path $cleanInput -Parent if ([string]::IsNullOrWhiteSpace($parent)) { $parent = '.' } $leaf = Split-Path -Path $cleanInput -Leaf } if (-not (Test-Path -LiteralPath $parent -PathType Container)) { return @() } $items = @(Get-ChildItem -LiteralPath $parent -ErrorAction SilentlyContinue) $items = $items | Where-Object { $_.Name -like ([System.Management.Automation.WildcardPattern]::Escape($leaf) + '*') } | Sort-Object -Property Name foreach ($item in $items) { $pathText = if ($parent -eq '.' -or [string]::IsNullOrWhiteSpace($cleanInput)) { $item.Name } elseif ([System.IO.Path]::IsPathRooted($cleanInput)) { Join-Path -Path $parent -ChildPath $item.Name } else { Join-Path -Path $parent -ChildPath $item.Name } if ($item.PSIsContainer -and -not $pathText.EndsWith([System.IO.Path]::DirectorySeparatorChar)) { $pathText += [System.IO.Path]::DirectorySeparatorChar } $quotedPath = ConvertTo-DirnameQuotedValue -Value $pathText -QuoteChar $quoteChar if ($item.PSIsContainer) { New-DirnameCompletionResult -CompletionText $quotedPath -ListItemText $pathText -ResultType 'ProviderContainer' -ToolTip $item.FullName } else { New-DirnameCompletionResult -CompletionText $quotedPath -ListItemText $pathText -ResultType 'ProviderItem' -ToolTip $item.FullName } } } function Get-DirnameOptionDescription { param([string]$Option) $cache = Get-Variable -Name 'DirnameCompletionDescriptions' -Scope Script -ErrorAction Ignore if ($null -ne $cache -and $null -ne $cache.Value -and $cache.Value.ContainsKey($Option)) { return $cache.Value[$Option] } 'Option for dirname.' } function Complete-Dirname { param( [string]$wordToComplete, [System.Management.Automation.Language.CommandAst]$commandAst, [int]$cursorPosition ) $currentWord = Get-DirnameCurrentToken -CommandAst $commandAst -CursorPosition $cursorPosition -Fallback $wordToComplete if ([string]::IsNullOrEmpty($currentWord)) { return @() } if ($currentWord.StartsWith('-')) { return @( foreach ($option in Get-DirnameCompletionOptions) { if ($option.StartsWith($currentWord, [System.StringComparison]::Ordinal)) { New-DirnameCompletionResult -CompletionText $option -ListItemText $option -ResultType 'ParameterName' -ToolTip (Get-DirnameOptionDescription -Option $option) } } ) } Get-DirnamePathCompletions -InputPath $currentWord } Register-ArgumentCompleter -Native -CommandName 'dirname', 'dirname.exe' -ScriptBlock { param($wordToComplete, $commandAst, $cursorPosition) Complete-Dirname -wordToComplete $wordToComplete -commandAst $commandAst -cursorPosition $cursorPosition } |