Transpilers/Templates/R.Template.psx.ps1
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<# .SYNOPSIS R Template Transpiler. .DESCRIPTION Allows PipeScript to generate R. Because R Scripts only allow single-line comments, this is done using a pair of comment markers. # { or # PipeScript{ begins a PipeScript block # } or # }PipeScript ends a PipeScript block ~~~r # { Uncommented lines between these two points will be ignored # # Commented lines will become PipeScript / PowerShell. # param($message = "hello world") # "puts `"$message`"" # } ~~~ .EXAMPLE Invoke-PipeScript { $rScript = ' # { Uncommented lines between these two points will be ignored # # Commented lines will become PipeScript / PowerShell. # param($message = "hello world") # "print(`"$message`")" # } ' [OutputFile('.\HelloWorld.ps1.r')]$rScript } Invoke-PipeScript .\HelloWorld.ps1.r #> [ValidatePattern('\.r$')] param( # The command information. This will include the path to the file. [Parameter(Mandatory,ValueFromPipeline,ParameterSetName='TemplateFile')] [Management.Automation.CommandInfo] $CommandInfo, # If set, will return the information required to dynamically apply this template to any text. [Parameter(Mandatory,ParameterSetName='TemplateObject')] [switch] $AsTemplateObject, # A dictionary of parameters. [Collections.IDictionary] $Parameter, # A list of arguments. [PSObject[]] $ArgumentList ) begin { # We start off by declaring a number of regular expressions: $startComment = '(?>\#\s{0,}(?:PipeScript)?\s{0,}\{)' $endComment = '(?>\#\s{0,}\}\s{0,}(?:PipeScript)?\s{0,})' $startRegex = "(?<PSStart>${startComment})" $endRegex = "(?<PSEnd>${endComment})" # Create a splat containing arguments to the core inline transpiler $Splat = [Ordered]@{ StartPattern = $startRegex EndPattern = $endRegex # Using -LinePattern will skip any inline code not starting with # LinePattern = "^\s{0,}\#\s{0,}" } } process { # If we have been passed a command if ($CommandInfo) { # add parameters related to the file. $Splat.SourceFile = $commandInfo.Source -as [IO.FileInfo] $Splat.SourceText = [IO.File]::ReadAllText($commandInfo.Source) } if ($Parameter) { $splat.Parameter = $Parameter } if ($ArgumentList) { $splat.ArgumentList = $ArgumentList } # If we are being used within a keyword, if ($AsTemplateObject) { $splat # output the parameters we would use to evaluate this file. } else { # Otherwise, call the core template transpiler .>PipeScript.Template @Splat # and output the changed file. } } |