From 4ec2624f44126e100fa247e96fb28ce2bd2c6eb1 Mon Sep 17 00:00:00 2001
From: David Eisinger <david.eisinger@gmail.com>
Date: Thu, 6 Jul 2023 22:05:20 -0400
Subject: [PATCH] Check for dup refs in renumber script

---
 bin/renumber | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/bin/renumber b/bin/renumber
index 72db1a5..f7b7a61 100755
--- a/bin/renumber
+++ b/bin/renumber
@@ -9,6 +9,13 @@ end
 
 content = File.read(filename)
 
+refs = content.scan(/\[\d+\]:/)
+
+unless refs == refs.uniq
+  warn "Error: duplicate refs detected"
+  exit
+end
+
 links = content.scan(/\[\d+\]/).uniq
 
 links.zip(1..).each do |old_id, new_id|