Revert "Remove legacy checks inside entrypoint.sh"

entrypoint.sh

@@ -2,6 +2,23 @@
 
 set -e
 
+# Workaround unitl new Actions support neutral strategy
+# See how it was before: https://developer.github.com/actions/creating-github-actions/accessing-the-runtime-environment/#exit-codes-and-statuses
+NEUTRAL_EXIT_CODE=0
+
+# skip if no /rebase
+echo "Checking if comment contains '/rebase' command..."
+(jq -r ".comment.body" "$GITHUB_EVENT_PATH" | grep -Fq "/rebase") || exit $NEUTRAL_EXIT_CODE
+
+# skip if not a PR
+echo "Checking if issue is a pull request..."
+(jq -r ".issue.pull_request.url" "$GITHUB_EVENT_PATH") || exit $NEUTRAL_EXIT_CODE
+
+if [[ "$(jq -r ".action" "$GITHUB_EVENT_PATH")" != "created" ]]; then
+	echo "This is not a new comment event!"
+	exit $NEUTRAL_EXIT_CODE
+fi
+
 PR_NUMBER=$(jq -r ".issue.number" "$GITHUB_EVENT_PATH")
 echo "Collecting information about PR #$PR_NUMBER of $GITHUB_REPOSITORY..."