From 62a059c822fa3ddf9a5ae771fe1496bdf82f32c5 Mon Sep 17 00:00:00 2001
From: Bryce Kwon <bryce@brycekwon.com>
Date: Sun, 19 Jul 2026 16:40:16 -1000
Subject: Move syntax highlighting to a Lua source filter

---
 source/ui-tree.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

(limited to 'source')

diff --git a/source/ui-tree.c b/source/ui-tree.c
index d3b3a30..df7e9e5 100644
--- a/source/ui-tree.c
+++ b/source/ui-tree.c
@@ -30,7 +30,6 @@ struct walk_tree_context {
 static void print_text_buffer(const char *name, char *buf, unsigned long size)
 {
 	unsigned long lineno, idx;
-	const char *ext;
 	const char *numberfmt = "<a id='n%1$d' href='#n%1$d'>%1$d</a>\n";
 
 	html("<table summary='blob content' class='blob'>\n");
@@ -68,13 +67,10 @@ static void print_text_buffer(const char *name, char *buf, unsigned long size)
 		return;
 	}
 
-	/* No source filter is configured, so tag the code with its file
-	 * extension (or bare name, for Makefile and the like) and let
-	 * cgit.js highlight it client-side. */
-	ext = strrchr(name, '.');
-	html("<td class='lines'><pre><code data-lang='");
-	html_attr(ext && ext[1] ? ext + 1 : name);
-	html("'>");
+	/* No source filter is configured, so serve the text plain. Syntax
+	 * highlighting ships as an optional source filter in extensions/,
+	 * keeping language knowledge out of the core. */
+	html("<td class='lines'><pre><code>");
 	html_txt(buf);
 	html("</code></pre></td></tr></table>\n");
 }
-- 
cgit v2.8.0