PowerShell wrapper for AjaxMin.dll

Export-Minified.ps1

#requires -Version 2
[CmdletBinding()]
param (

	[parameter(Mandatory=$true)]
	$InputPath
	
)

$ErrorActionPreference = "Stop"
Set-PSDebug -Strict

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

# Load input data
Write-Verbose "Loading input from $InputPath"
$InputData = [System.IO.File]::ReadAllText($InputPath)

# Load AjaxMin.dll
Add-Type -Path (Join-Path -Path $PSScriptRoot -ChildPath "AjaxMin.dll")
$Minifier = New-Object -TypeName Microsoft.Ajax.Utilities.Minifier

# Perform the minification
switch ([System.IO.Path]::GetExtension($InputPath).ToLowerInvariant())
{
	".js"
	{
		Write-Verbose "Processing data as JavaScript"
		$OutputData = $Minifier.MinifyJavaScript($InputData)
	}
	".css"
	{
		Write-Verbose "Processing data as CSS"
		$OutputData = $Minifier.MinifyStyleSheet($InputData)
	}
	default { throw "Unknown filetype." }
}
$Minifier.Errors | ForEach-Object {
	throw $_
}

# Write the output data
$OutputPath = [System.IO.Path]::ChangeExtension($InputPath, ".min" + [System.IO.Path]::GetExtension($InputPath))
Write-Verbose "Writing output to $OutputPath"
Set-Content $OutputPath $OutputData