initial commit #4

	name: Require Branch to Be Up-to-Date

	# 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: Determine Comparison Branch
	id: comparison
	run: \|
	if [[ "${{ github.event.pull_request.base.ref }}" == "main" && "${{ github.event.pull_request.head.ref }}" == "development" ]]; then
	echo "branch=main" >> $GITHUB_ENV
	else
	echo "branch=development" >> $GITHUB_ENV
	fi

	- name: Checkout pull request branch
	uses: actions/checkout@v3
	with:
	ref: ${{ github.event.pull_request.head.ref }}

	- name: Fetch comparison branch
	run: \|
	git fetch --unshallow
	git fetch origin ${{ env.branch }}

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

	exit 1
	fi

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