scan-tree: add test for noweb-file in repo dir

If such a file exists, the repo is not added to the repolist.

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

scan-tree.c

@@ -56,6 +56,8 @@ static void add_repo(const char *base, const char *path, repo_config_fn fn)
 			path, strerror(errno), errno);
 		return;
 	}
+	if (!stat(fmt("%s/noweb", path), &st))
+		return;
 	if ((pwd = getpwuid(st.st_uid)) == NULL) {
 		fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
 			path, strerror(errno), errno);