completers/sdelete_completer/sdelete_completer.ps1
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# sdelete tab completion for PowerShell # Static-first native completer for SDelete with risk-bounded mode-aware suggestions. Set-StrictMode -Version 2.0 if (-not (Get-Variable -Name SDeleteCompletionCatalog -Scope Script -ErrorAction Ignore)) { $script:SDeleteCompletionCatalog = @{ PassHints = @('1', '3', '7', '10') DriveCache = $null Switches = @( @{ Token = '-c'; Description = 'Clean free space.'; TakesValue = $false; Modes = @('free', 'root') } @{ Token = '-f'; Description = 'Force bare-letter arguments to be treated as file or directory paths.'; TakesValue = $false; Modes = @('delete', 'root') } @{ Token = '-p'; Description = 'Specifies number of overwrite passes.'; TakesValue = $true; ValueKind = 'Passes'; Modes = @('delete', 'free', 'root') } @{ Token = '-q'; Description = 'Quiet mode.'; TakesValue = $false; Modes = @('delete', 'free', 'root') } @{ Token = '-r'; Description = 'Remove the read-only attribute.'; TakesValue = $false; Modes = @('delete', 'root') } @{ Token = '-s'; Description = 'Recurse subdirectories.'; TakesValue = $false; Modes = @('delete', 'root') } @{ Token = '-z'; Description = 'Zero free space.'; TakesValue = $false; Modes = @('free', 'root') } @{ Token = '-nobanner'; Description = 'Do not display the startup banner and copyright message.'; TakesValue = $false; Modes = @('delete', 'free', 'root') } @{ Token = '-accepteula'; Description = 'Accept the Sysinternals license agreement (suppresses the first-run dialog).'; TakesValue = $false; Modes = @('delete', 'free', 'root') } @{ Token = '/?'; Description = 'Show SDelete help.'; TakesValue = $false; Modes = @('delete', 'free', 'root') } ) } } function New-SDeleteCompletionResult { param( [string]$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, $ToolTip ) } function Remove-SDeleteOuterQuotes { param([string]$Value) if ($null -eq $Value) { return '' } $Value.Trim([char[]]@([char]34, [char]39)) } function ConvertTo-SDeleteQuotedValue { param( [string]$Value, [bool]$AlwaysQuote = $false ) if ([string]::IsNullOrWhiteSpace($Value)) { return $Value } if (($AlwaysQuote -or $Value -match '\s') -and -not ($Value.StartsWith('"') -and $Value.EndsWith('"'))) { $escaped = $Value.Replace('`', '``').Replace('"', '`"') return '"' + $escaped + '"' } $Value } function Get-SDeleteTokenState { param( [string]$Line, [int]$CursorPosition ) if ($null -eq $Line) { $Line = '' } $safeCursor = [Math]::Min([Math]::Max($CursorPosition, 0), $Line.Length) $prefix = $Line.Substring(0, $safeCursor) $tokens = New-Object System.Collections.Generic.List[string] $builder = New-Object System.Text.StringBuilder $quoteChar = [char]0 foreach ($character in $prefix.ToCharArray()) { if (($character -eq [char]34) -or ($character -eq [char]39)) { if ($quoteChar -eq [char]0) { $quoteChar = $character } elseif ($quoteChar -eq $character) { $quoteChar = [char]0 } [void]$builder.Append($character) continue } if ([char]::IsWhiteSpace($character) -and $quoteChar -eq [char]0) { if ($builder.Length -gt 0) { $tokens.Add($builder.ToString()) [void]$builder.Clear() } continue } [void]$builder.Append($character) } $hasTrailingSpace = $prefix -match '\s$' if ($builder.Length -gt 0) { $tokens.Add($builder.ToString()) } if ($hasTrailingSpace) { return [pscustomobject]@{ TokensBeforeCurrent = @($tokens) CurrentToken = '' } } if ($tokens.Count -gt 0) { return [pscustomobject]@{ TokensBeforeCurrent = @($tokens | Select-Object -First ($tokens.Count - 1)) CurrentToken = $tokens[$tokens.Count - 1] } } [pscustomobject]@{ TokensBeforeCurrent = @() CurrentToken = '' } } function Get-SDeleteState { param([string[]]$TokensBeforeCurrent) $usedSwitches = @{} $positionals = New-Object System.Collections.Generic.List[string] $pendingValueKind = $null $helpRequested = $false $passValue = $null foreach ($token in $TokensBeforeCurrent) { $cleanToken = Remove-SDeleteOuterQuotes -Value $token if ([string]::IsNullOrWhiteSpace($cleanToken)) { continue } if ($pendingValueKind) { if ($pendingValueKind -eq 'Passes') { $passValue = $cleanToken } $pendingValueKind = $null continue } if ($cleanToken.StartsWith('-') -or $cleanToken.StartsWith('/')) { $lookup = $cleanToken.ToLowerInvariant() $usedSwitches[$lookup] = $true if ($lookup -eq '-p') { $pendingValueKind = 'Passes' } if ($lookup -eq '/?') { $helpRequested = $true } continue } $positionals.Add($cleanToken) } $mode = if ($usedSwitches.ContainsKey('-c') -or $usedSwitches.ContainsKey('-z')) { 'free' } else { 'delete' } [pscustomobject]@{ UsedSwitches = $usedSwitches Positionals = @($positionals) PendingValueKind = $pendingValueKind HelpRequested = $helpRequested PassValue = $passValue Mode = $mode } } function Get-SDeleteSwitchCompletions { param( [string]$CurrentWord, [pscustomobject]$State ) $cleanCurrent = Remove-SDeleteOuterQuotes -Value $CurrentWord $freeModeChosen = ($State.UsedSwitches.ContainsKey('-c') -or $State.UsedSwitches.ContainsKey('-z')) foreach ($switchSpec in $script:SDeleteCompletionCatalog.Switches) { $lookup = $switchSpec.Token.ToLowerInvariant() if ($State.UsedSwitches.ContainsKey($lookup)) { continue } if ($freeModeChosen -and $switchSpec.Token -in @('-r', '-s', '-f')) { continue } if (-not $freeModeChosen -and $State.Positionals.Count -gt 0 -and $switchSpec.Token -in @('-c', '-z')) { continue } if ($freeModeChosen -and (($switchSpec.Token -eq '-c' -and $State.UsedSwitches.ContainsKey('-z')) -or ($switchSpec.Token -eq '-z' -and $State.UsedSwitches.ContainsKey('-c')))) { continue } if ($switchSpec.Token.StartsWith($cleanCurrent, [System.StringComparison]::OrdinalIgnoreCase)) { New-SDeleteCompletionResult -CompletionText $switchSpec.Token -ListItemText $switchSpec.Token -ResultType 'ParameterName' -ToolTip $switchSpec.Description } } } function Get-SDeleteDeletePathCompletions { param([string]$InputPath) $cleanInput = Remove-SDeleteOuterQuotes -Value $InputPath $alwaysQuote = -not [string]::IsNullOrEmpty($InputPath) -and ($InputPath.StartsWith('"') -or $InputPath.StartsWith("'")) if ([string]::IsNullOrWhiteSpace($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 } $inputIsRooted = -not [string]::IsNullOrWhiteSpace($cleanInput) -and [System.IO.Path]::IsPathRooted($cleanInput) $items = @(Get-ChildItem -LiteralPath $parent -ErrorAction Ignore) $items = $items | Where-Object { $_.Name -like ([System.Management.Automation.WildcardPattern]::Escape($leaf) + '*') } foreach ($item in ($items | Sort-Object -Property @{ Expression = 'PSIsContainer'; Descending = $true }, Name)) { if ($inputIsRooted) { $pathText = Join-Path -Path $parent -ChildPath $item.Name } elseif ($parent -eq '.' -or [string]::IsNullOrWhiteSpace($cleanInput)) { $pathText = $item.Name } else { $pathText = Join-Path -Path $parent -ChildPath $item.Name } if ($item.PSIsContainer -and -not $pathText.EndsWith('\')) { $pathText += '\' } $quotedPath = ConvertTo-SDeleteQuotedValue -Value $pathText -AlwaysQuote $alwaysQuote $resultType = if ($item.PSIsContainer) { 'ProviderContainer' } else { 'ParameterValue' } New-SDeleteCompletionResult -CompletionText $quotedPath -ListItemText $pathText -ResultType $resultType -ToolTip $item.FullName } } function Get-SDeletePassCompletions { param([string]$CurrentWord) $cleanCurrent = Remove-SDeleteOuterQuotes -Value $CurrentWord $results = New-Object System.Collections.Generic.List[object] foreach ($hint in $script:SDeleteCompletionCatalog.PassHints) { if ($hint.StartsWith($cleanCurrent, [System.StringComparison]::OrdinalIgnoreCase)) { $results.Add((New-SDeleteCompletionResult -CompletionText $hint -ListItemText $hint -ResultType 'ParameterValue' -ToolTip 'Overwrite pass count for SDelete.')) } } if ($results.Count -eq 0 -and -not [string]::IsNullOrWhiteSpace($CurrentWord)) { $results.Add((New-SDeleteCompletionResult -CompletionText $CurrentWord -ListItemText $CurrentWord -ResultType 'ParameterValue' -ToolTip 'Overwrite pass count for SDelete.')) } if ($results.Count -eq 0 -and [string]::IsNullOrWhiteSpace($CurrentWord)) { $results.Add((New-SDeleteCompletionResult -CompletionText ' ' -ListItemText '<passes>' -ResultType 'ParameterValue' -ToolTip 'Overwrite pass count for SDelete.')) } @($results.ToArray()) } function Get-SDeleteDriveLetterCache { if ($null -eq $script:SDeleteCompletionCatalog.DriveCache) { $script:SDeleteCompletionCatalog.DriveCache = @( Get-PSDrive -PSProvider FileSystem -ErrorAction SilentlyContinue | Where-Object { $_.Name.Length -eq 1 } | Sort-Object -Property Name | ForEach-Object { $_.Name + ':' } ) } @($script:SDeleteCompletionCatalog.DriveCache) } function Get-SDeleteFreeSpaceTargetCompletions { param([string]$CurrentWord) $cleanCurrent = Remove-SDeleteOuterQuotes -Value $CurrentWord $results = New-Object System.Collections.Generic.List[object] foreach ($candidate in (Get-SDeleteDriveLetterCache)) { if ($candidate.StartsWith($cleanCurrent, [System.StringComparison]::OrdinalIgnoreCase)) { $results.Add((New-SDeleteCompletionResult -CompletionText $candidate -ListItemText $candidate -ResultType 'ParameterValue' -ToolTip ('Free-space cleaning target drive ' + $candidate))) } } foreach ($diskNumber in @('0', '1', '2')) { if ($diskNumber.StartsWith($cleanCurrent, [System.StringComparison]::OrdinalIgnoreCase)) { $results.Add((New-SDeleteCompletionResult -CompletionText $diskNumber -ListItemText $diskNumber -ResultType 'ParameterValue' -ToolTip 'Sample physical disk number target.')) } } if ([string]::IsNullOrWhiteSpace($cleanCurrent) -or '<drive:>'.StartsWith($cleanCurrent, [System.StringComparison]::OrdinalIgnoreCase)) { $results.Add((New-SDeleteCompletionResult -CompletionText '<drive:>' -ListItemText '<drive:>' -ResultType 'ParameterValue' -ToolTip 'Drive letter target for -c or -z mode.')) } if ([string]::IsNullOrWhiteSpace($cleanCurrent) -or '<physical-disk-number>'.StartsWith($cleanCurrent, [System.StringComparison]::OrdinalIgnoreCase)) { $results.Add((New-SDeleteCompletionResult -CompletionText '<physical-disk-number>' -ListItemText '<physical-disk-number>' -ResultType 'ParameterValue' -ToolTip 'Physical disk number target for -c or -z mode.')) } @($results.ToArray()) } function Get-SDeleteAmbiguousLetterResults { param([string]$CurrentWord) if ([string]::IsNullOrWhiteSpace($CurrentWord)) { return @() } @( New-SDeleteCompletionResult -CompletionText $CurrentWord -ListItemText $CurrentWord -ResultType 'ParameterValue' -ToolTip 'Bare-letter paths are ambiguous for SDelete; use -f or a path separator to force file or directory mode.' ) } function Complete-SDelete { param( [string]$wordToComplete, [System.Management.Automation.Language.CommandAst]$commandAst, [int]$cursorPosition ) $line = $commandAst.ToString() $relativeCursor = $cursorPosition - $commandAst.Extent.StartOffset if ($relativeCursor -gt $line.Length) { $line = $line.PadRight($relativeCursor) } $tokenState = Get-SDeleteTokenState -Line $line -CursorPosition $relativeCursor $currentWord = $tokenState.CurrentToken $state = Get-SDeleteState -TokensBeforeCurrent @($tokenState.TokensBeforeCurrent | Select-Object -Skip 1) if ($state.HelpRequested) { return @( New-SDeleteCompletionResult -CompletionText ' ' -ListItemText '<complete>' -ResultType 'ParameterValue' -ToolTip 'SDelete help is terminal for completion.' ) } if ($state.PendingValueKind -eq 'Passes') { return @(Get-SDeletePassCompletions -CurrentWord $currentWord) } if (-not [string]::IsNullOrEmpty($currentWord) -and ($currentWord.StartsWith('-') -or $currentWord.StartsWith('/'))) { return @(Get-SDeleteSwitchCompletions -CurrentWord $currentWord -State $state) } $results = New-Object System.Collections.Generic.List[object] if ([string]::IsNullOrEmpty((Remove-SDeleteOuterQuotes -Value $currentWord))) { foreach ($switchItem in @(Get-SDeleteSwitchCompletions -CurrentWord '' -State $state)) { $results.Add($switchItem) } } if ($state.Mode -eq 'free') { foreach ($item in @(Get-SDeleteFreeSpaceTargetCompletions -CurrentWord $currentWord)) { $results.Add($item) } return @($results.ToArray()) } if (-not $state.UsedSwitches.ContainsKey('-f') -and (Remove-SDeleteOuterQuotes -Value $currentWord) -match '^[A-Za-z]$') { foreach ($item in @(Get-SDeleteAmbiguousLetterResults -CurrentWord $currentWord)) { $results.Add($item) } } foreach ($item in @(Get-SDeleteDeletePathCompletions -InputPath $currentWord)) { $results.Add($item) } @($results.ToArray()) } Register-ArgumentCompleter -Native -CommandName 'sdelete', 'sdelete.exe' -ScriptBlock { param($wordToComplete, $commandAst, $cursorPosition) Complete-SDelete -wordToComplete $wordToComplete -commandAst $commandAst -cursorPosition $cursorPosition } |