Transpilers/Inline/Inline.XML.psx.ps1

<#
.SYNOPSIS
    XML Inline PipeScript Transpiler.
.DESCRIPTION
    Transpiles XML with Inline PipeScript into XML.

    Multiline comments blocks like this ```<!--{}-->``` will be treated as blocks of PipeScript.
#>

[ValidateScript({
    $cmdInfo = $_
    if ($cmdInfo.Source -match '\.(?>xml|xaml|ps1xml)$') {
        return $true
    }
    return $false    
})]
param(
# The command information. This will include the path to the file.
[Parameter(Mandatory,ValueFromPipeline)]
$CommandInfo
)

begin {
    # We start off by declaring a number of regular expressions:
    $startComment = '<\!--' # * Start Comments ```<!--```
    $endComment   = '-->'   # * End Comments ```-->```
    $Whitespace   = '[\s\n\r]{0,}'
    # * StartRegex ```$StartComment + '{' + $Whitespace```
    $startRegex = "(?<PSStart>${startComment}\{$Whitespace)"
    # * EndRegex ```$whitespace + '}' + $EndComment```
    $endRegex   = "(?<PSEnd>$Whitespace\}${endComment}\s{0,})"
}

process {
    
    $fileInfo = $commandInfo.Source -as [IO.FileInfo]
    $fileText      = [IO.File]::ReadAllText($fileInfo.Fullname)

    .>PipeScript.Inline -SourceFile $CommandInfo.Source -SourceText $fileText -StartPattern $startRegex -EndPattern $endRegex
}