[WIP] Cross-project model aggregation #11034

	# See .github/workflows/CheckBadMerge.groovy for explanation
	name: Check bad merge commit
	on:
	pull_request:
	types:
	- opened
	- synchronize

	permissions: {}

	jobs:
	check_pr_commits:
	if: github.event.pull_request.base.ref == 'master'
	permissions:
	contents: read
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Set up JDK 17
	uses: actions/setup-java@v4
	with:
	distribution: 'temurin'
	java-version: '17'
	- name: Install Groovy
	run: sudo apt-get install groovy
	- name: List PR commits
	run: \|
	git log --pretty=format:"%H" ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }} > pr_commits.txt
	- name: Check PR commits
	id: run_check
	run: \|
	groovy .github/workflows/CheckBadMerge.groovy pr_commits.txt > output.txt 2>&1
	- name: Read output file
	id: read_output
	if: ${{ always() }}
	run: \|
	cat output.txt
	OUTPUT=$(cat output.txt)
	echo "OUTPUT<<EOF" >> $GITHUB_ENV
	echo "$OUTPUT" >> $GITHUB_ENV
	echo "EOF" >> $GITHUB_ENV
	- name: Comment on PR if check failed
	if: ${{ failure() }}
	uses: actions/github-script@v7
	with:
	github-token: ${{ secrets.GITHUB_TOKEN }}
	script: \|
	const output = `
	Some bad merge is found:
	\`\`\`
	${{ env.OUTPUT }}
	\`\`\`
	`;
	github.rest.issues.createComment({
	issue_number: context.issue.number,
	owner: context.repo.owner,
	repo: context.repo.repo,
	body: output
	})

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