PowerShell/Scripts/check-xml-file.ps1

<#
.SYNOPSIS
	Checks the given XML file for validity
.DESCRIPTION
	This script checks the given XML file for validity.
.PARAMETER file
	Specifies the path to the XML file to check
.EXAMPLE
	PS> ./check-xml-file myfile.xml
	✔️ XML file is valid
.NOTES
	Author: Markus Fleschutz · License: CC0
.LINK
	https://github.com/fleschutz/PowerShell
#>

param([string]$file = "")

try {
	if ($file -eq "" ) { $file = read-host "Enter path to XML file" }

	$XmlFile = Get-Item $file
	
	$script:ErrorCount = 0
	
	# Perform the XSD Validation
	$ReaderSettings = New-Object -TypeName System.Xml.XmlReaderSettings
	$ReaderSettings.ValidationType = [System.Xml.ValidationType]::Schema
	$ReaderSettings.ValidationFlags = [System.Xml.Schema.XmlSchemaValidationFlags]::ProcessInlineSchema -bor [System.Xml.Schema.XmlSchemaValidationFlags]::ProcessSchemaLocation
	$ReaderSettings.add_ValidationEventHandler({ $script:ErrorCount++ })
	$Reader = [System.Xml.XmlReader]::Create($XmlFile.FullName, $ReaderSettings)
	while ($Reader.Read()) { }
	$Reader.Close()
	
	if ($script:ErrorCount -gt 0) {
		write-warning "Invalid XML file"
		exit 1
	} 

	"✔️ XML file is valid"
	exit 0 # success
} catch {
	"⚠️ Error: $($Error[0]) ($($MyInvocation.MyCommand.Name):$($_.InvocationInfo.ScriptLineNumber))"
	exit 1
}