SNOW-1546090 add merge gate for future thread safe updates #21

	name: Threadsafe Check

	on:
	pull_request:
	types: [opened, synchronize, labeled, unlabeled, edited]

	jobs:
	check_threadsafety:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Check for modified files
	id: changed_files
	run: \|
	echo "changed_files=$(git diff --name-only --diff-filter=ACMRT ${{ github.event.pull_request.base.sha }} ${{ github.sha }} \| xargs)" >> $GITHUB_OUTPUT

	- name: Verify threadsafety acknowledgement
	run: \|
	CHANGED_FILES="${{ steps.changed_files.outputs.changed_files }}"
	# Check if changed files are in snowpark/_internal, snowpark/mock, or snowpark/*.py. We exclude snowpark/modin in this check.
	if echo "$CHANGED_FILES" \| grep -qE '(src/snowflake/snowpark/_internal\|src/snowflake/snowpark/mock\|src/snowflake/snowpark/[^/]+\.py)'; then
	echo "Checking PR description for thread-safety acknowledgment..."
	if [[ "${{ github.event.pull_request.body }}" != "[x] I acknowledge that I have ensured my changes to be thread-safe" ]]; then
	echo "Thread-safety acknowledgment not found in PR description."
	echo "Please acknowledge the threadsafety implications of your changes by adding '[x] I acknowledge that I have ensured my changes to be thread-safe' to the PR description."
	exit 1
	else
	echo "Thread-safety acknowledgment found in PR description."
	fi
	else
	echo "No critical files modified; skipping threadsafety check."
	fi

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