Update validation check to handle 'none' state #17

	#
	# GitHub Actions Workflow: Validate iTop datamodel XML v3.2
	#
	# This workflow runs on every pull request to the 'main' branch.
	# It validates an XML data model against the corresponding XSD schema.
	# The validation logic is implemented in a separate Python script.
	#

	name: Validate iTop datamodel XML version 3.2

	on:
	pull_request:
	branches: [ main ]

	jobs:
	validate-xml:
	runs-on: ubuntu-latest
	env:
	XSD_PATH: 3.2/itop_design.xsd
	XML_PATH: test/datamodel.must-validate.xml

	steps:
	- name: Check out repository
	uses: actions/checkout@v3
	with:
	fetch-depth: 0

	- name: Check if files in 3.2 changed
	id: changes
	run: \|
	git fetch origin main
	CHANGED=$(git diff --name-only origin/main...HEAD \| grep '^3.2/' \|\| true)
	if [ -z "$CHANGED" ]; then
	echo "skip=true" >> $GITHUB_OUTPUT
	else
	echo "skip=false" >> $GITHUB_OUTPUT
	fi

	- name: Prepare Python environment
	if: steps.changes.outputs.skip == 'false'
	uses: actions/setup-python@v5
	with:
	python-version: '3.x'

	- name: Install XML validation dependencies
	if: steps.changes.outputs.skip == 'false'
	run: pip install -r scripts/requirements.txt

	- name: Validate XML datamodel against schema
	if: steps.changes.outputs.skip == 'false'
	run: python scripts/validate_xml.py $XSD_PATH $XML_PATH

	- name: Skip validation (no relevant changes)
	if: steps.changes.outputs.skip == 'true'
	run: echo "No relevant changes in /3.2. Skipping validation."

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