[gimp] libgimpconfig: create parent directories for config file if necessary.

[Jehan Pagès <jehanp src gnome org>]

commit 08cc37271fc73c430fd382a4b593bc5e502a502b
Author: Jehan <jehan girinstud io>
Date:   Sun Apr 22 22:11:13 2018 +0200

    libgimpconfig: create parent directories for config file if necessary.
    
    The directory should be already created by GIMP. But just in case it is
    not there, for whatever reason, don't just fail. Try and create all
    parents.

 libgimpconfig/gimpconfigwriter.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)
---
diff --git a/libgimpconfig/gimpconfigwriter.c b/libgimpconfig/gimpconfigwriter.c
index d408452..7da9a9a 100644
--- a/libgimpconfig/gimpconfigwriter.c
+++ b/libgimpconfig/gimpconfigwriter.c
@@ -170,10 +170,25 @@ gimp_config_writer_new_gfile (GFile        *file,
 {
   GimpConfigWriter *writer;
   GOutputStream    *output;
+  GFile            *dir;
 
   g_return_val_if_fail (G_IS_FILE (file), NULL);
   g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 
+  dir = g_file_get_parent (file);
+  if (dir && ! g_file_query_exists (dir, NULL))
+    {
+      if (! g_file_make_directory_with_parents (dir, NULL, error))
+        g_prefix_error (error,
+                        _("Could not create directory '%s' for '%s': "),
+                        gimp_file_get_utf8_name (dir),
+                        gimp_file_get_utf8_name (file));
+    }
+  g_object_unref (dir);
+
+  if (error && *error)
+    return NULL;
+
   if (atomic)
     {
       output = G_OUTPUT_STREAM (g_file_replace (file,