completers/sha384sum_completer/sha384sum_completer.ps1
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# sha384sum tab completion for PowerShell # Static option completion for sha384sum.exe and sha384sum. Set-StrictMode -Version 2.0 function Get-Sha384sumCompletionOptions { $cache = Get-Variable -Name 'Sha384sumCompletionOptions' -Scope Script -ErrorAction Ignore if ($null -ne $cache -and $null -ne $cache.Value) { return $cache.Value } $fallbackOptions = @('-b', '--binary', '-c', '--check', '-w', '--warn', '--status', '--quiet', '--strict', '--ignore-missing', '--tag', '-t', '--text', '-z', '--zero', '-h', '--help', '-V', '--version') $commandCandidates = @('sha384sum.exe', 'sha384sum') foreach ($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 'Sha384sumCompletionOptions' -Value (@($options | Sort-Object)) -Scope Script Set-Variable -Name 'Sha384sumCompletionDescriptions' -Value $descriptions -Scope Script return (Get-Variable -Name 'Sha384sumCompletionOptions' -Scope Script).Value } } Set-Variable -Name 'Sha384sumCompletionOptions' -Value $fallbackOptions -Scope Script return (Get-Variable -Name 'Sha384sumCompletionOptions' -Scope Script).Value } function New-Sha384sumCompletionResult { param( [string]$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, $ToolTip ) } function ConvertFrom-Sha384sumTypedWord { # Splits the word typed so far into its value and the opening quote the user # typed ('' when bare), undoing that quote style's escapes. param([string]$Text) $quote = '' if ($Text.StartsWith("'") -or $Text.StartsWith('"')) { $quote = $Text.Substring(0, 1) $Text = $Text.Substring(1) if ($Text.EndsWith($quote)) { $Text = $Text.Substring(0, $Text.Length - 1) } $Text = if ($quote -eq "'") { $Text.Replace("''", "'") } else { $Text -replace '`(.)', '$1' } } [pscustomobject]@{ Value = $Text; Quote = $quote } } function Test-Sha384sumArgumentNeedsQuote { # Whitespace and argument-mode metacharacters (including the typographic # quotes PowerShell treats as quotes) end or split a bare word; a leading # '@' or '#' would start a splat or a comment. param([string]$Value) $Value -match '[\s{}();,|&<>''"`$\u2018-\u201E]' -or $Value -match '^[@#]' } function ConvertTo-Sha384sumArgument { # Renders a value as one PowerShell argument: bare when safe and no quote was # typed, otherwise in the typed quote style (single by default). param( [string]$Value, [string]$Quote ) if (-not $Quote) { if (-not (Test-Sha384sumArgumentNeedsQuote -Value $Value)) { return $Value } $Quote = "'" } if ($Quote -eq "'") { return "'" + ($Value -replace '([''\u2018-\u201B])', '$1$1') + "'" } '"' + ($Value -replace '([`"$\u201C-\u201E])', '`$1') + '"' } function Get-Sha384sumCurrentWord { param( [System.Management.Automation.Language.CommandAst]$CommandAst, [int]$CursorPosition, [string]$Fallback ) # The parser keeps an unterminated quoted word as one element running past the cursor, so # the element under the cursor is the whole word even when it holds spaces. foreach ($element in $CommandAst.CommandElements | Select-Object -Skip 1) { if ($element.Extent.StartOffset -lt $CursorPosition -and $CursorPosition -le $element.Extent.EndOffset) { return $element.Extent.Text.Substring(0, $CursorPosition - $element.Extent.StartOffset) } } # Between words, where PowerShell's own word is empty too. $Fallback } function Get-Sha384sumPathCompletions { param([string]$InputPath) $typed = ConvertFrom-Sha384sumTypedWord -Text $InputPath $cleanInput = $typed.Value # Bare names are emitted only when the user typed no directory part. A lone '.', '~' or a # trailing '..' segment names a directory itself; any other trailing segment, '.' included, # is a name prefix, so '.\.' lists the dotfiles here. The text is split by hand because # Split-Path resolves '.' and '..' segments to real folder names. $bareNames = $false $separator = $cleanInput.LastIndexOfAny([char[]]@('\', '/')) if ([string]::IsNullOrWhiteSpace($cleanInput)) { $parent = '.' $leaf = '' $bareNames = $true } elseif ($cleanInput -match '(?:^|[\\/])\.\.$' -or $cleanInput -in @('.', '~')) { $parent = $cleanInput $leaf = '' } elseif ($separator -lt 0) { $parent = '.' $leaf = $cleanInput $bareNames = $true } else { $parent = $cleanInput.Substring(0, $separator + 1) $leaf = $cleanInput.Substring($separator + 1) } 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) { $pathText = if ($bareNames) { $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 } # PowerShell expands a leading '~' in a bare native argument but not inside quotes. $argumentText = $pathText if (($typed.Quote -or (Test-Sha384sumArgumentNeedsQuote -Value $pathText)) -and $pathText -match '^~[\\/]') { $argumentText = $HOME + $pathText.Substring(1) } $quotedPath = ConvertTo-Sha384sumArgument -Value $argumentText -Quote $typed.Quote if ($item.PSIsContainer) { New-Sha384sumCompletionResult -CompletionText $quotedPath -ListItemText $pathText -ResultType 'ProviderContainer' -ToolTip $item.FullName } else { New-Sha384sumCompletionResult -CompletionText $quotedPath -ListItemText $pathText -ResultType 'ProviderItem' -ToolTip $item.FullName } } } function Get-Sha384sumOptionDescription { param([string]$Option) $cache = Get-Variable -Name 'Sha384sumCompletionDescriptions' -Scope Script -ErrorAction Ignore if ($null -ne $cache -and $null -ne $cache.Value -and $cache.Value.ContainsKey($Option)) { return $cache.Value[$Option] } 'Option for sha384sum.' } function Complete-Sha384sum { param( [string]$wordToComplete, [System.Management.Automation.Language.CommandAst]$commandAst, [int]$cursorPosition ) $currentWord = Get-Sha384sumCurrentWord -CommandAst $commandAst -CursorPosition $cursorPosition -Fallback $wordToComplete if ([string]::IsNullOrEmpty($currentWord)) { return @() } if ($currentWord.StartsWith('-')) { return @( foreach ($option in Get-Sha384sumCompletionOptions) { if ($option.StartsWith($currentWord, [System.StringComparison]::Ordinal)) { New-Sha384sumCompletionResult -CompletionText $option -ListItemText $option -ResultType 'ParameterName' -ToolTip (Get-Sha384sumOptionDescription -Option $option) } } ) } Get-Sha384sumPathCompletions -InputPath $currentWord } Register-ArgumentCompleter -Native -CommandName 'sha384sum', 'sha384sum.exe' -ScriptBlock { param($wordToComplete, $commandAst, $cursorPosition) Complete-Sha384sum -wordToComplete $wordToComplete -commandAst $commandAst -cursorPosition $cursorPosition } |