fix virtual-root if script-name is ""

In d0cb841 (Avoid trailing slash in virtual-root), virtual-root was set
from script-name using trim_end().  However, if script-name was the
empty string (""), which happens when cgit is used to serve the root
path on a domain (/), trim_end() returns NULL and cgit acts like
virtual-root is not available.  Now, set virtual-root to "" in this
case, which fixes this bug.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/cgit.c b/cgit.c
index e302a7c..e498030 100644
--- a/cgit.c
+++ b/cgit.c
@@ -748,26 +748,29 @@ int main(int argc, const char **argv)
 	cgit_repolist.count = 0;
 	cgit_repolist.repos = NULL;
 
 	cgit_parse_args(argc, argv);
 	parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
 	ctx.repo = NULL;
 	http_parse_querystring(ctx.qry.raw, querystring_cb);
 
 	/* If virtual-root isn't specified in cgitrc, lets pretend
 	 * that virtual-root equals SCRIPT_NAME, minus any possibly
 	 * trailing slashes.
 	 */
-	if (!ctx.cfg.virtual_root)
+	if (!ctx.cfg.virtual_root && ctx.cfg.script_name) {
 		ctx.cfg.virtual_root = trim_end(ctx.cfg.script_name, '/');
+		if (!ctx.cfg.virtual_root)
+			ctx.cfg.virtual_root = "";
+        }
 
 	/* If no url parameter is specified on the querystring, lets
 	 * use PATH_INFO as url. This allows cgit to work with virtual
 	 * urls without the need for rewriterules in the webserver (as
 	 * long as PATH_INFO is included in the cache lookup key).
 	 */
 	path = ctx.env.path_info;
 	if (!ctx.qry.url && path) {
 		if (path[0] == '/')
 			path++;
 		ctx.qry.url = xstrdup(path);
 		if (ctx.qry.raw) {