src/public/Format-ScriptPadOperators.ps1
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function Format-ScriptPadOperators { <# .SYNOPSIS Pads powershell assignment operators with single spaces. .DESCRIPTION Pads powershell assignment operators with single spaces. .PARAMETER Code Multi-line or piped lines of code to process. .PARAMETER SkipPostProcessingValidityCheck After modifications have been made a check will be performed that the code has no errors. Use this switch to bypass this check (This is not recommended!) .EXAMPLE PS > $testfile = 'C:\temp\test.ps1' PS > $test = Get-Content $testfile -raw PS > $test | Format-ScriptPadOperators | clip Description ----------- Takes C:\temp\test.ps1 as input, spaced all assignment operators and puts the result in the clipboard to be pasted elsewhere for review. .NOTES Author: Zachary Loeber Site: http://www.the-little-things.net/ Requires: Powershell 3.0 Version History 1.0.0 - Initial release #> [CmdletBinding()] param( [parameter(Position=0, Mandatory=$true, ValueFromPipeline=$true, HelpMessage='Lines of code to process.')] [AllowEmptyString()] [string[]]$Code, [parameter(Position=1, HelpMessage='Bypass code validity check after modifications have been made.')] [switch]$SkipPostProcessingValidityCheck ) begin { if ($script:ThisModuleLoaded -eq $true) { Get-CallerPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState } $FunctionName = $MyInvocation.MyCommand.Name Write-Verbose "$($FunctionName): Begin." $Codeblock = @() $ParseError = $null $Tokens = $null $operatorlist = @('Equals','Minus','Plus','MinusEquals','PlusEquals','Divide','DivideEquals','Multiply','MultiplyEquals','Rem','RemainderEquals') $predicate = { ($args[0] -is [System.Management.Automation.Language.AssignmentStatementAst]) -and ($operatorlist -contains $args[0].Operator) -and ($args[0].Left -is [System.Management.Automation.Language.VariableExpressionAst]) } } process { $Codeblock += $Code } end { $ScriptText = $Codeblock | Out-String Write-Verbose "$($FunctionName): Attempting to parse AST." $AST = [System.Management.Automation.Language.Parser]::ParseInput($ScriptText, [ref]$Tokens, [ref]$ParseError) if($ParseError) { $ParseError | Write-Error throw "$($FunctionName): Will not work properly with errors in the script, please modify based on the above errors and retry." } $assignments = $ast.FindAll($predicate, $true) for($t = $assignments.Count - 1; $t -ge 0; $t--) { $assignment = $assignments[$t] [string]$NewExtent = '' # This causes extra processing but accounts for embedded assignments like $a=$b=$c=0 $subassignments = ($assignments[$t]).FindAll($predicate, $true) for($t2 = 0; $t2 -lt $subassignments.Count; $t2++) { $NewExtent += $subassignments[$t2].Left.Extent.Text + ' ' + $subassignments[$t2].ErrorPosition.Text + ' ' if ($t2 -eq ($subassignments.Count - 1)) { $NewExtent += $subassignments[$t2].Right.Extent.Text } $RemoveStart = $assignment.Extent.StartOffset $RemoveEnd = $assignment.Extent.EndOffset - $RemoveStart $ScriptText = $ScriptText.Remove($RemoveStart,$RemoveEnd).Insert($RemoveStart,$NewExtent) } } # Validate our returned code doesn't have any unintentionally introduced parsing errors. if (-not $SkipPostProcessingValidityCheck) { if (-not (Format-ScriptTestCodeBlock -Code $ScriptText)) { throw "$($FunctionName): Modifications made to the scriptblock resulted in code with parsing errors!" } } $ScriptText Write-Verbose "$($FunctionName): End." } } |