update-desktop-database: List only once a desktop file per mime type

If a desktop file is registering the same mime type more than once
(useless but okay), the desktop file was listed more than once for that
mime type in mimeinfo.cache.

It's easy to avoid, so make sure we only have a desktop file once per
mime type.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/update-desktop-database.c b/src/update-desktop-database.c
index ffc1440..7f48357 100644
--- a/src/update-desktop-database.c
+++ b/src/update-desktop-database.c
@@ -83,6 +83,13 @@ cache_desktop_file (const char  *desktop_file,
 
   desktop_files = (GList *) g_hash_table_lookup (mime_types_map, mime_type);
 
+  /* do not add twice a desktop file mentioning the mime type more than once
+   * (no need to use g_list_find() because we cache all mime types registered
+   * by a desktop file before moving to another desktop file) */
+  if (desktop_files &&
+      strcmp (desktop_file, (const char *) desktop_files->data) == 0)
+    return;
+
   desktop_files = g_list_prepend (desktop_files, g_strdup (desktop_file));
   g_hash_table_insert (mime_types_map, g_strdup (mime_type), desktop_files);
 }