PipeScript

0.2.8

Languages/XML/XML-Language.ps.ps1

Language function XML {
<#
.SYNOPSIS
    XML PipeScript Language Definition.
.DESCRIPTION
    Allows PipeScript to generate XML.

    Multiline comments blocks like this ```<!--{}-->``` will be treated as blocks of PipeScript.
#>
[ValidatePattern('\.xml$')]
param()
    # XML files can be many extensions, but `.xml` should always be standard XML.
    $FilePattern = '\.xml$'
    # We start off by declaring a number of regular expressions:
    $startComment = '<\!--' # * Start Comments ```<!--```
    $endComment   = '-->'   # * End Comments ```-->```
    $Whitespace   = '[\s\n\r]{0,}'
    # * StartPattern ```$StartComment + '{' + $Whitespace```
    $startPattern = "(?<PSStart>${startComment}\{$Whitespace)"
    # * EndPattern ```$whitespace + '}' + $EndComment```
    $endPattern   = "(?<PSEnd>$Whitespace\}${endComment}\s{0,})"

    # XML Is a Data Language. It declares information, but does not run code.
    $DataLanguage =  $true
    # XML is also quite famously case-sensitive.
    $CaseSensitive = $true

    # The "interpreter" for XML simply reads each of the files.
    $Interpreter = {        
        $xmlFiles = @(foreach ($arg in $args) {
            if (Test-path $arg) {                
                [IO.File]::ReadAllText($arg) -as [xml]
            }
            else {
                $otherArgs += $arg
            }
        })
        
        $xmlFiles
    }
        
    $ForeachObject = {
        $in = $_
        if (($in -is [string]) -or 
            ($in.GetType -and $in.GetType().IsPrimitive)) {
            $in
        } elseif ($in.ChildNodes) {
            foreach ($inChildNode in $in.ChildNodes) {
                if ($inChildNode.NodeType -ne 'XmlDeclaration') {
                    $inChildNode.OuterXml
                }
            }
        } else {
            $inXml = (ConvertTo-Xml -Depth 100 -InputObject $in)
            foreach ($inChildNode in $inXml.ChildNodes) {
                if ($inChildNode.NodeType -ne 'XmlDeclaration') {
                    $inChildNode.OuterXml
                }
            }
        }
    }
}