Ensemble manager #4

	name: Require Branch to Be Up-to-Date with Main

	# Trigger this workflow on pull request events targeting a specific branch.
	on:
	pull_request:
	branches:
	- main
	- development
	workflow_dispatch: # enables manual triggering

	jobs:
	check-branch:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout pull request branch
	uses: actions/checkout@v3
	with:
	ref: ${{ github.event.pull_request.head.ref }}

	- name: Fetch main branch
	run: \|
	git fetch --unshallow
	git fetch origin main

	- name: Compare branch with main
	run: \|
	if git merge-base --is-ancestor origin/main HEAD; then
	echo "::notice ::Branch is up-to-date with main."
	else
	echo "::error ::Merge Blocked: Your branch is behind the latest commits on main. Please update your branch with the latest changes from main before attempting to merge."
	echo "Merge base: $(git merge-base HEAD origin/main)"
	exit 1
	fi

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