Web asset merging with PowerShell

Merge-Assets.cmd

@echo off
setlocal
set tempscript=%temp%\%~n0.%random%.ps1
echo $ErrorActionPreference="Stop" >"%tempscript%"
echo ^& "%~dpn0.ps1" %* >>"%tempscript%"
powershell.exe -command "& \"%tempscript%\""
set errlvl=%ERRORLEVEL%
del "%tempscript%"
exit /b %errlvl%

Merge-Assets.ps1

#requires -Version 2
param (
	[switch]$Verbose = $false
)

$ErrorActionPreference = "Stop"
if ($Verbose) { $VerbosePreference = "Continue" }

$PSScriptFilePath = (Get-Item $MyInvocation.MyCommand.Path).FullName
$PSScriptRoot = Split-Path -Path $PSScriptFilePath -Parent

$SearchPath = $PSScriptRoot

Write-Verbose "Searching recursively for *.set in $SearchPath"

$SetDefinitions = Get-ChildItem -Path $SearchPath -Include "*.set" -Recurse

ForEach($SetDefinition in $SetDefinitions)
{
	$SetOutput = Join-Path $SetDefinition.DirectoryName -ChildPath $SetDefinition.BaseName
	$SetRoot = Split-Path $SetDefinition -Parent
	Get-Content $SetDefinition |
		%{ Get-Content -Path (Join-Path $SetRoot -ChildPath $_) } |
			Set-Content -Path $SetOutput
}

Sample.set.js

yui/core-library.js
some-dependency.js
some-other-dependency.js