completers/numfmt_completer/numfmt_completer.ps1
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# numfmt tab completion for PowerShell # Static option completion for numfmt.exe and numfmt. Set-StrictMode -Version 2.0 function Get-NumfmtCompletionOptions { $cache = Get-Variable -Name 'NumfmtCompletionOptions' -Scope Script -ErrorAction Ignore if ($null -ne $cache -and $null -ne $cache.Value) { return $cache.Value } $fallbackOptions = @('--debug', '--field', '--format', '--from', '--to', '--invalid', '--suffix', '--round', '--padding', '--grouping', '--header', '--zero-terminated', '--help', '--version', '-d', '-f', '-i', '-o', '-p', '-s', '-z') $commandCandidates = @('numfmt.exe', 'numfmt') foreach ($candidate in $commandCandidates) { $command = Get-Command -Name $candidate -ErrorAction SilentlyContinue if ($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($helpOutput, '\r?\n'))) { # The option table ends at the first unindented line after it ('UNIT options:'); # the prose below it lists field ranges such as '-M' that are not options. if ($options.Count -gt 0 -and $line -match '^\S') { break } foreach ($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 'NumfmtCompletionOptions' -Value (@($options | Sort-Object)) -Scope Script Set-Variable -Name 'NumfmtCompletionDescriptions' -Value $descriptions -Scope Script return (Get-Variable -Name 'NumfmtCompletionOptions' -Scope Script).Value } } Set-Variable -Name 'NumfmtCompletionOptions' -Value $fallbackOptions -Scope Script return (Get-Variable -Name 'NumfmtCompletionOptions' -Scope Script).Value } function New-NumfmtCompletionResult { param( [string]$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, $ToolTip ) } function Get-NumfmtLineTokens { param( [string]$Line, [int]$CursorPosition ) # Tokens come from the raw command text because the PowerShell parser drops a bare ',' # ('numfmt -d , ') from CommandElements. if ([string]::IsNullOrWhiteSpace($Line)) { return @() } $safeCursor = [Math]::Min([Math]::Max($CursorPosition, 0), $Line.Length) $prefix = $Line.Substring(0, $safeCursor) @([regex]::Matches($prefix, '"[^"]*"?|''[^'']*''?|\S+') | ForEach-Object { $_.Value }) } function Get-NumfmtCurrentToken { param( [string]$Line, [int]$CursorPosition, [string]$Fallback ) if ([string]::IsNullOrWhiteSpace($Line)) { return $Fallback } $safeCursor = [Math]::Min([Math]::Max($CursorPosition, 0), $Line.Length) if ($Line.Substring(0, $safeCursor) -match '\s$') { return '' } $parts = @(Get-NumfmtLineTokens -Line $Line -CursorPosition $CursorPosition) if ($parts.Count -gt 0) { return $parts[-1] } $Fallback } function Resolve-NumfmtValueOption { param([string]$Token) # Map a short spelling or an '--opt=value' head to the long option that owns the value table. if ([string]::IsNullOrEmpty($Token)) { return $null } $name = $Token -replace '=.*$', '' if ($name -ceq '-d') { return '--delimiter' } $name } function Get-NumfmtValueTable { # Values verified against GNU coreutils 8.32 and uutils 0.11.0 --help. '--header[=N]' only # takes its value attached, so it is served for '--header=' and never for the next token. $table = [System.Collections.Hashtable]::new([System.StringComparer]::Ordinal) $table['--field'] = @( @{ Text = '1'; Tip = 'Field 1 (N: the N-th field, counted from 1).' } @{ Text = '1,2'; Tip = 'Fields 1 and 2; ranges may be separated with commas.' } @{ Text = '2-'; Tip = 'N-: from the N-th field to the end of the line.' } @{ Text = '2-4'; Tip = 'N-M: from the N-th to the M-th field, inclusive.' } @{ Text = '-3'; Tip = '-M: from the first to the M-th field, inclusive.' } @{ Text = '-'; Tip = 'All fields.' } ) $table['--format'] = @( @{ Text = '%f'; Tip = 'Floating-point format; FORMAT must print one %f argument.' } @{ Text = "%'f"; Quoted = '"%''f"'; Tip = 'Quote flag enables --grouping (locale permitting).' } @{ Text = '%10f'; Tip = 'Width value pads the output.' } @{ Text = '%010f'; Tip = 'Zero width zero-pads the number.' } @{ Text = '%-10f'; Tip = 'Negative width left-aligns.' } @{ Text = '%.1f'; Tip = 'Precision overrides the input-determined precision.' } @{ Text = '<format>'; Tip = 'printf-style floating-point format.' } ) $table['--from'] = @( @{ Text = 'none'; Tip = 'No auto-scaling; suffixes trigger an error (default).' } @{ Text = 'auto'; Tip = 'Accept an optional one- or two-letter suffix: 1K = 1000, 1Ki = 1024.' } @{ Text = 'si'; Tip = 'Accept an optional single-letter suffix: 1K = 1000, 1M = 1000000.' } @{ Text = 'iec'; Tip = 'Accept an optional single-letter suffix: 1K = 1024, 1M = 1048576.' } @{ Text = 'iec-i'; Tip = 'Accept an optional two-letter suffix: 1Ki = 1024, 1Mi = 1048576.' } ) $table['--to'] = @( @{ Text = 'none'; Tip = 'No auto-scaling (default).' } @{ Text = 'si'; Tip = 'Single-letter suffix: 1K = 1000, 1M = 1000000.' } @{ Text = 'iec'; Tip = 'Single-letter suffix: 1K = 1024, 1M = 1048576.' } @{ Text = 'iec-i'; Tip = 'Two-letter suffix: 1Ki = 1024, 1Mi = 1048576.' } ) $table['--invalid'] = @( @{ Text = 'abort'; Tip = 'Stop at the first invalid number with exit status 2 (default).' } @{ Text = 'fail'; Tip = 'Warn for each invalid number; exit status 2.' } @{ Text = 'warn'; Tip = 'Warn for each invalid number; exit status 0.' } @{ Text = 'ignore'; Tip = 'Do not diagnose invalid numbers; exit status 0.' } ) $table['--round'] = @( @{ Text = 'up'; Tip = 'Round up when scaling.' } @{ Text = 'down'; Tip = 'Round down when scaling.' } @{ Text = 'from-zero'; Tip = 'Round away from zero (default).' } @{ Text = 'towards-zero'; Tip = 'Round towards zero.' } @{ Text = 'nearest'; Tip = 'Round to the nearest value.' } ) $table['--padding'] = @( @{ Text = '10'; Tip = 'Right-align in 10 characters.' } @{ Text = '-10'; Tip = 'Left-align in 10 characters (negative N).' } @{ Text = '<N>'; Tip = 'Pad the output to N characters.' } ) $table['--suffix'] = @( @{ Text = 'B'; Tip = 'Print B after each number and accept it on input.' } @{ Text = '<suffix>'; Tip = 'Suffix printed after each number and accepted on input.' } ) $table['--delimiter'] = @( @{ Text = ','; Tip = 'Comma field delimiter.' } @{ Text = ';'; Tip = 'Semicolon field delimiter.' } @{ Text = '|'; Tip = 'Pipe field delimiter.' } @{ Text = "`t"; Display = '<tab>'; Quoted = '"`t"'; Tip = 'Tab field delimiter (PowerShell "`t" escape).' } @{ Text = '<char>'; Tip = 'Single character to use instead of whitespace.' } ) $table['--header'] = @( @{ Text = '1'; Tip = 'Print the first line without converting it.' } @{ Text = '<N>'; Tip = 'Number of header lines to print unconverted.' } ) $table['--from-unit'] = @( @{ Text = '1'; Tip = 'Input unit size 1 (default).' } @{ Text = '1024'; Tip = 'Input unit size 1024.' } @{ Text = '<N>'; Tip = 'Input unit size.' } ) $table['--to-unit'] = @( @{ Text = '1'; Tip = 'Output unit size 1 (default).' } @{ Text = '1024'; Tip = 'Output unit size 1024.' } @{ Text = '<N>'; Tip = 'Output unit size.' } ) $table['--unit-separator'] = @( @{ Text = ' '; Display = '<space>'; Quoted = "' '"; Tip = 'Single space between the number and its unit.' } @{ Text = '<string>'; Tip = 'String printed between the number and its unit (uutils build).' } ) $table } function Get-NumfmtValueCompletions { param( [string]$Option, [string]$Prefix, [string]$Attached = '' ) $table = Get-NumfmtValueTable if ([string]::IsNullOrEmpty($Option) -or -not $table.ContainsKey($Option)) { return @() } # A quoted or half-quoted value is matched on its bare text and re-quoted the same way. $quote = '' if ($Prefix.Length -gt 0 -and ($Prefix[0] -eq '"' -or $Prefix[0] -eq "'")) { $quote = [string]$Prefix[0] $Prefix = $Prefix.Substring(1) if ($Prefix.EndsWith($quote)) { $Prefix = $Prefix.Substring(0, $Prefix.Length - 1) } } @( foreach ($entry in $table[$Option]) { if (-not $entry.Text.StartsWith($Prefix, [System.StringComparison]::Ordinal)) { continue } $display = if ($entry.ContainsKey('Display')) { $entry.Display } else { $entry.Text } $completion = if ($entry.ContainsKey('Quoted')) { $entry.Quoted } elseif ($quote) { $quote + $entry.Text + $quote } else { $entry.Text } New-NumfmtCompletionResult -CompletionText ($Attached + $completion) -ListItemText $display -ResultType 'ParameterValue' -ToolTip $entry.Tip } ) } function Complete-NumfmtOperand { param([string]$Prefix) # 'numfmt [OPTION]... [NUMBER]...' reads numbers, never files; describe the slot with # number-shaped placeholders instead of filesystem paths. $numbers = @( @{ Text = '1000'; Tip = 'Plain number.' } @{ Text = '1K'; Tip = 'Number with a single-letter suffix (needs --from=si, iec or auto).' } @{ Text = '1Ki'; Tip = 'Number with a two-letter suffix (needs --from=iec-i or auto).' } @{ Text = '1M'; Tip = 'Number with a single-letter suffix (needs --from=si, iec or auto).' } @{ Text = '<number>'; Tip = 'Number to reformat; standard input is read when none is given.' } ) @( foreach ($entry in $numbers) { if ($entry.Text.StartsWith($Prefix, [System.StringComparison]::Ordinal)) { New-NumfmtCompletionResult -CompletionText $entry.Text -ListItemText $entry.Text -ResultType 'ParameterValue' -ToolTip $entry.Tip } } ) } function Get-NumfmtOptionDescription { param([string]$Option) $cache = Get-Variable -Name 'NumfmtCompletionDescriptions' -Scope Script -ErrorAction Ignore if ($null -ne $cache -and $null -ne $cache.Value -and $cache.Value.ContainsKey($Option)) { return $cache.Value[$Option] } 'Option for numfmt.' } function Complete-Numfmt { param( [string]$wordToComplete, [System.Management.Automation.Language.CommandAst]$commandAst, [int]$cursorPosition ) $commandText = $commandAst.ToString() $relativeCursor = $cursorPosition - $commandAst.Extent.StartOffset $currentWord = if ($cursorPosition -gt $commandAst.Extent.EndOffset) { '' } else { Get-NumfmtCurrentToken -Line $commandText -CursorPosition $relativeCursor -Fallback $wordToComplete } $lineTokens = @(Get-NumfmtLineTokens -Line $commandText -CursorPosition $relativeCursor | Select-Object -Skip 1) $tokensBeforeCurrent = @(if ([string]::IsNullOrEmpty($currentWord)) { $lineTokens } else { $lineTokens | Select-Object -First ([Math]::Max(0, $lineTokens.Count - 1)) }) # Attached form: '--to=s', '--header=' (the only spelling --header takes a value in). if ($currentWord -match '^(?<option>--[A-Za-z][A-Za-z0-9-]*|-d)=(?<value>.*)$') { $option = Resolve-NumfmtValueOption -Token $Matches['option'] return Get-NumfmtValueCompletions -Option $option -Prefix $Matches['value'] -Attached ($Matches['option'] + '=') } # Separate form: the previous token is a value-taking option ('--from a' -> auto). if ($tokensBeforeCurrent.Count -gt 0 -and -not ($currentWord -match '^-[A-Za-z]|^--')) { $previous = $tokensBeforeCurrent[-1] $option = Resolve-NumfmtValueOption -Token $previous if ($option -cne '--header' -and ($previous -ceq $option -or $previous -ceq '-d') -and (Get-NumfmtValueTable).ContainsKey($option)) { return Get-NumfmtValueCompletions -Option $option -Prefix $currentWord } } if ($currentWord -match '^-[A-Za-z]|^--|^-$') { return @( foreach ($option in Get-NumfmtCompletionOptions) { if ($option.StartsWith($currentWord, [System.StringComparison]::Ordinal)) { New-NumfmtCompletionResult -CompletionText $option -ListItemText $option -ResultType 'ParameterName' -ToolTip (Get-NumfmtOptionDescription -Option $option) } } ) } Complete-NumfmtOperand -Prefix $currentWord } Register-ArgumentCompleter -Native -CommandName 'numfmt', 'numfmt.exe' -ScriptBlock { param($wordToComplete, $commandAst, $cursorPosition) Complete-Numfmt -wordToComplete $wordToComplete -commandAst $commandAst -cursorPosition $cursorPosition } |