From 7119fee96350afd5c81a1cbc0187282ebf81eadd Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Fri, 15 Jul 2022 21:18:21 +0200
Subject: [PATCH] lua-filters.md: Add link to @wlupton's logging.lua.

Closes #8146.
---
 doc/lua-filters.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/lua-filters.md b/doc/lua-filters.md
index 88bcf7043..5f533ecfe 100644
--- a/doc/lua-filters.md
+++ b/doc/lua-filters.md
@@ -395,6 +395,12 @@ colon syntax (`mystring:uc_upper()`).
 
 # Debugging Lua filters
 
+William Lupton has written a Lua module with some handy
+functions for debugging Lua filters, including functions
+that can pretty-print the Pandoc AST elements manipulated
+by the filters: it is available at
+<https://github.com/wlupton/pandoc-lua-logging>.
+
 It is possible to use a debugging interface to halt execution and
 step through a Lua filter line by line as it is run inside Pandoc.
 This is accomplished using the remote-debugging interface of the