try to check static feed URLs in changed DMFR files #2

	name: Check feed URLs in changed DMFR files

	on:
	pull_request:
	paths:
	- 'feeds/*.dmfr.json'
	types: [opened, synchronize]

	jobs:
	validate:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.x'

	- name: Install transitland-lib
	run: scripts/install-transitland-lib.sh

	- name: Get changed files and validate
	id: validation
	run: \|
	# Get list of changed dmfr files using GitHub's base and head refs
	changed_files=$(git diff --name-only origin/${{ github.base_ref }} HEAD -- 'feeds/*.dmfr.json')

	# Exit if no dmfr files changed
	if [ -z "$changed_files" ]; then
	echo "No DMFR files changed"
	exit 0
	fi

	validation_output=""

	# Loop through changed files
	for file in $changed_files; do
	echo "Validating $file"
	if ! output=$(python scripts/check-feed-urls.py "$file" 2>&1); then
	validation_output+="### Validation issues in $file\n\n\`\`\`\n$output\n\`\`\`\n\n"
	echo "has_errors=true" >> $GITHUB_OUTPUT
	fi
	done

	# Set the validation output as a step output
	echo "message<<EOF" >> $GITHUB_OUTPUT
	echo "$validation_output" >> $GITHUB_OUTPUT
	echo "EOF" >> $GITHUB_OUTPUT

	- name: Comment on PR
	if: steps.validation.outputs.has_errors == 'true'
	uses: actions/github-script@v6
	with:
	script: \|
	await github.rest.issues.createComment({
	owner: context.repo.owner,
	repo: context.repo.repo,
	issue_number: context.issue.number,
	body: '${{ steps.validation.outputs.message }}'
	});

	core.setFailed('Validation failed - see PR comments for details');

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