[glib] gio-querymodules: Make the output reproducible

[Philip Withnall <pwithnall src gnome org>]

commit e5eaca5492d3e08d7d955e475cb4607a2d0fff61
Author: Chris Lamb <lamby debian org>
Date:   Tue Aug 29 16:59:56 2017 +0100

    gio-querymodules: Make the output reproducible
    
    Whilst working on the Reproducible Builds effort [0], we noticed that
    queryimmodules generates non-reproducible output as it iterates over the
    filesystem without sorting.
    
    Patch attached.
    
     [0] https://reproducible-builds.org/
    
    Signed-off-by: Chris Lamb <lamby debian org>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786983

 gio/gio-querymodules.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gio/gio-querymodules.c b/gio/gio-querymodules.c
index 667336a..7abfe07 100644
--- a/gio/gio-querymodules.c
+++ b/gio/gio-querymodules.c
@@ -42,6 +42,7 @@ query_dir (const char *dirname)
 {
   GString *data;
   GDir *dir;
+  GList *list = NULL, *iterator = NULL;
   const char *name;
   char *cachename;
   char **(* query)  (void);
@@ -63,11 +64,16 @@ query_dir (const char *dirname)
   data = g_string_new ("");
 
   while ((name = g_dir_read_name (dir)))
+    list = g_list_prepend (list, g_strdup (name));
+
+  list = g_list_sort (list, (GCompareFunc) g_strcmp0);
+  for (iterator = list; iterator; iterator = iterator->next)
     {
       GModule *module;
       gchar     *path;
       char **extension_points;
 
+      name = iterator->data;
       if (!is_valid_module_name (name))
        continue;
 
@@ -100,6 +106,7 @@ query_dir (const char *dirname)
     }
 
   g_dir_close (dir);
+  g_list_free_full (list, g_free);
 
   cachename = g_build_filename (dirname, "giomodule.cache", NULL);