Add dotnet upgrade assistant CLI image to rule/dotnet-upgrade-assistant #101

	name: Validate-Frontmatter

	on:
	pull_request:
	branches: [ main ]

	workflow_dispatch:

	jobs:
	validate-frontmatter:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	issues: write
	repository-projects: read
	pull-requests: write

	steps:
	# Step 1: Check out the source code of the pull request.
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0
	token: ${{ secrets.GITHUB_TOKEN }}
	ref: ${{ github.event.pull_request.head.ref }}
	repository: ${{ github.event.pull_request.head.repo.full_name }}

	# Step 2: Set up the Node.js environment.
	- uses: actions/setup-node@v3

	# Step 3: Get the list of changed files in the PR
	- name: Get changed files
	id: get_changed
	if: ${{ github.event_name == 'pull_request' }}
	run: \|
	echo "changed=$(git diff --name-only $(git merge-base origin/main HEAD) HEAD)" \| paste -sd "," - >> $GITHUB_ENV

	# Step 4: Check Markdown files for valid frontmatter
	- name: Check for Markdown files
	uses: mathiasvr/command-output@v1
	id: check_markdown
	with:
	run: \|
	cd scripts/frontmatter-validator
	npm install --silent
	node frontmatter-validator.js '${{ env.changed }}'

	# Step 5: Comment on the PR if the previous step failed
	- name: Comment on PR
	if: failure()
	uses: mshick/add-pr-comment@v2
	with:
	message: \|
	${{ steps.check_markdown.outputs.stdout }}
	Please fix the Frontmatter in your Markdown files.
	repo-token: ${{ secrets.GITHUB_TOKEN }}
	repo-token-user-login: "github-actions[bot]"
	allow-repeats: true

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