Join-PipeScript.ps1
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function Join-PipeScript { <# .SYNOPSIS Joins PowerShell and PipeScript ScriptBlocks .DESCRIPTION Joins ScriptBlocks written in PowerShell or PipeScript. .EXAMPLE Get-Command Join-PipeScript | Join-PipeScript .LINK Update-PipeScript #> [Alias('Join-ScriptBlock', 'jps')] param( # A ScriptBlock written in PowerShell or PipeScript. [Parameter(Mandatory,ParameterSetName='ScriptBlock',ValueFromPipeline,ValueFromPipelineByPropertyName)] [Alias('Definition')] [ScriptBlock[]] $ScriptBlock, # A list of block types to be skipped during a merge of script blocks. # By default, no blocks will be skipped [ValidateSet('using', 'requires', 'help','param','dynamicParam','begin','process','end')] [string[]] $SkipBlockType, # A list of block types to include during a merge of script blocks. [ValidateSet('using', 'requires', 'help','param','dynamicParam','begin','process','end')] [string[]] $BlockType = @('using', 'requires', 'help','param','dynamicParam','begin','process','end'), # If set, will transpile the joined ScriptBlock. [switch] $Transpile ) begin { $AllScriptBlocks = @() filter IndentAst { $ast = $_ (' ' * ($ast | MeasureIndent)) + "$($ast.Extent)" # combine the statements a newline. } filter MeasureIndent { $ast = $_ $parentExtent = $ast.Parent.Extent if (-not $parentExtent) { return 0 } $untilLineStart = [Regex]::new('(?<=[\r\n])[\s-[\r\n]]{0,}', 'RightToLeft,Singleline') $distanceFromParent = $ast.Extent.StartOffset - $parentExtent.StartOffset return $untilLineStart.Match($parentExtent.ToString(), $distanceFromParent).Length } } process { if ($ScriptBlock) { $AllScriptBlocks += $ScriptBlock } } end { if ($SkipBlockType) { foreach ($skipBlock in $SkipBlockType) { if ($blockType -contains $skipBlock) { $blockType = $BlockType -ne $skipBlock } } } $AllScriptBlocks = @( foreach ($toMerge in $AllScriptBlocks) { if ($toMerge.Ast.body) { [ScriptBlock]::Create($toMerge.Ast.Body.Extent.ToString() -replace '^\{' -replace '\}$') } else { $toMerge } }) $mergedScript = @( if ($BlockType -contains 'using') { foreach ($usingStatement in $AllScriptBlocks.Ast.UsingStatements) { $usingStatement.Extent.ToString() } } if ($BlockType -contains 'requires') { foreach ($requirement in $AllScriptBlocks.Ast.ScriptRequirements) { if ($requirement.RequirementPSVersion) { "#requires -Version $($requirement.RequirementPSVersion)" } if ($requirement.IsElevationRequired) { "#requires -RunAsAdministrator" } if ($requirement.RequiredModules) { "#requires -Module $(@(foreach ($reqModule in $requirement.RequiredModules) { if ($reqModule.Version -or $req.RequiredVersion -or $req.MaximumVersion) { '@{' + $(@(foreach ($prop in $reqModule.PSObject.Properties) { if (-not $prop.Value) { continue } if ($prop.Name -in 'Name', 'Version') { "Module$($prop.Name)='$($prop.Value.ToString().Replace("'","''"))'" } elseif ($prop.Name -eq 'RequiredVersion') { "MinimumVersion='$($prop.Value)'" } else { "$($prop.Name)='$($prop.Value)'" } }) -join ';') + '}' } else { $reqModule.Name } }) -join ',')" } if ($requirement.RequiredAssemblies) { "#requires -Assembly $($requirement.RequiredAssemblies -join ',')" } } } if ($BlockType -contains 'param') { foreach ($combined in $AllScriptBlocks.Ast.ParamBlock) { if (-not $combined.Parent.Extent) { continue } $combined.Parent.Extent.ToString().Substring(0, $combined.Extent.StartOffset) } } # Start the param block $alreadyIncludedParameter = [Ordered]@{} if ($BlockType -contains 'param') { if (@($AllScriptBlocks.Ast.ParamBlock) -ne $null) { ' ' * (@(@($AllScriptBlocks.Ast.ParamBlock) -ne $null)[0] | MeasureIndent) + "param(" } $paramOut = @( foreach ($combined in $AllScriptBlocks.Ast.ParamBlock) { # Include any existing parameters $parameterIndex = 0 foreach ($parameter in $combined.parameters) { $variableName = $parameter.Name.VariablePath.ToString() $inlineParameterHelp = if ($parameterIndex -gt 0) { $lastParameter = $parameter.Parent.Parameters[$parameterIndex - 1] $relativeOffset = $lastParameter.Extent.EndOffset + 1 - $parameter.Parent.Extent.StartOffset $distance = $parameter.Extent.StartOffset - $lastParameter.Extent.EndOffset - 1 $parameter.Parent.Extent.ToString().Substring($relativeOffset, $distance) -replace '^[\r\n]+' } else { $parentExtent = $parameter.Parent.Extent.ToString() $afterFirstParens = $parentExtent.IndexOf('(') + 1 $parentExtent.Substring($afterFirstParens, $parameter.Extent.StartOffset - $parameter.Parent.Extent.StartOffset - $afterFirstParens) -replace '^[\r\n]+' } if (-not $alreadyIncludedParameter[$variableName]) { $alreadyIncludedParameter[$variableName] = $inlineParameterHelp + $parameter.Extent.ToString() $alreadyIncludedParameter[$variableName] } else { $oldParam = "param (" + [Environment]::NewLine + $($alreadyIncludedParameter[$variableName]) + [Environment]::NewLine + ")" $oldParamScriptBlock = [ScriptBlock]::Create($oldParam) $oldParameter = $oldParamScriptBlock.Ast.ParamBlock.Parameters[0] # For the moment, parameters are not merged. This could be improved upon. } $parameterIndex++ } }) $paramOut -join (',' + ([Environment]::NewLine * 2)) if (@($AllScriptBlocks.Ast.ParamBlock) -ne $null) { ' ' * (@(@($AllScriptBlocks.Ast.ParamBlock) -ne $null)[0] | MeasureIndent) + ")" } } if ($BlockType -contains 'dynamicParam') { $blocks = @($AllScriptBlocks.Ast.DynamicParamBlock) if ($blocks -ne $null) { $blockOpen = $false foreach ($block in $blocks) { if (-not $block) { continue } if (-not $blockOpen) { ($block | IndentAst) -replace '\}$' $blockOpen = $true } else { $block.Extent.ToString() -replace '^dynamicParam\s{0,}\{' -replace '\}$' } } ' ' * ($block | MeasureIndent) + '}' } } if ($BlockType -contains 'begin') { # If there were begin blocks, $blocks = @($AllScriptBlocks.Ast.BeginBlock) if ($blocks -ne $null) { $blockOpen = $false foreach ($block in $blocks) { if (-not $block) { continue } if (-not $blockOpen) { ($block | IndentAst) -replace '\}$' $blockOpen = $true } else { $block.Extent.ToString() -replace '^begin\s{0,}\{' -replace '\}$' } } ' ' * ($block | MeasureIndent) + '}' } } if ($BlockType -contains 'process') { # If there were process blocks $blocks = @($AllScriptBlocks.Ast.ProcessBlock) if ($blocks -ne $null) { $blockOpen = $false foreach ($block in $blocks) { if (-not $block) { continue } if (-not $blockOpen) { ($block | IndentAst) -replace '\}$' $blockOpen = $true } else { $block.Extent.ToString() -replace '^process\s{0,}\{' -replace '\}$' } } ' ' * ($block | MeasureIndent) + '}' } } if ($BlockType -contains 'end') { # If there were end blcoks declared $blocks = @($AllScriptBlocks.Ast.EndBlock) if ($blocks -ne $null) { $blockOpen = $false foreach ($block in $blocks) { if (-not $block) { continue } if (-not $blockOpen -and -not $block.Unnamed) { ($block | IndentAst) -replace '\}$' $blockOpen = $true } elseif ($block.Statements.Count) { $block.Extent.ToString() -replace '^end\s{0,}\{' -replace '\}$' -replace '^param\(\)[\s\r\n]{0,}' } } if ($beginOrProcess -ne $null) { ' ' * ($block | MeasureIndent) + '}' } } } ) $combinedScriptBlock = [scriptblock]::Create($mergedScript -join [Environment]::NewLine) if ($combinedScriptBlock -and $Transpile) { $combinedScriptBlock | .>Pipescript } elseif ($combinedScriptBlock) { $combinedScriptBlock } else { $mergedScript -join [Environment]::NewLine } } } |