[PATCH v2] config: make empty js= omit script tag

["Jason A. Donenfeld" <Jason@zx2c4.com>]

From: Samuel Lidén Borell <samuel@kodafritt.se>

According to the cgitrc man page, an empty js= value should cause the
script tag to be omitted. But instead, a script tag with an empty URL
is emitted. The same applies to css. So, skip emitting a tag if the
specified string is empty.

Signed-off-by: Samuel Lidén Borell <samuel@kodafritt.se>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 ui-shared.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ui-shared.c b/ui-shared.c
index 11aed19..baea6f2 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -770,6 +770,10 @@ static void print_rel_vcs_link(const char *url)
 
 static int emit_css_link(struct string_list_item *s, void *arg)
 {
+	/* Do not emit anything if css= is specified. */
+	if (s && *s->string == '\0')
+		return 0;
+
 	html("<link rel='stylesheet' type='text/css' href='");
 	if (s)
 		html_attr(s->string);
@@ -782,6 +786,10 @@ static int emit_css_link(struct string_list_item *s, void *arg)
 
 static int emit_js_link(struct string_list_item *s, void *arg)
 {
+	/* Do not emit anything if js= is specified. */
+	if (s && *s->string == '\0')
+		return 0;
+
 	html("<script type='text/javascript' src='");
 	if (s)
 		html_attr(s->string);
-- 
2.39.0