[libgweather] GWeatherInfo: survive without a cache dir

[Giovanni Campagna <gcampagna src gnome org>]

commit 76436628aa8777853c20bf85c354d891120dd163
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Thu Dec 22 16:56:24 2016 +0100

    GWeatherInfo: survive without a cache dir
    
    I'd argue that a missing/unwritable XDG_CACHE_HOME is a broken setup,
    but people use that anyway, so let's warn and survive instead of
    crashing.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=770979

 libgweather/gweather-weather.c |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)
---
diff --git a/libgweather/gweather-weather.c b/libgweather/gweather-weather.c
index b940276..500cf49 100644
--- a/libgweather/gweather-weather.c
+++ b/libgweather/gweather-weather.c
@@ -29,6 +29,7 @@
 #include <time.h>
 #include <unistd.h>
 #include <langinfo.h>
+#include <errno.h>
 
 #include <gtk/gtk.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>
@@ -472,6 +473,7 @@ get_cache (void)
                                 "libgweather", NULL);
 
     if (g_mkdir_with_parents (filename, 0700) < 0) {
+       g_warning ("Failed to create libgweather cache directory: %s. Check your XDG_CACHE_HOME setting!", 
strerror (errno));
        g_free (filename);
        return NULL;
     }
@@ -505,12 +507,14 @@ ref_session (void)
     session = soup_session_new ();
 
     cache = get_cache ();
-    soup_session_add_feature (session, SOUP_SESSION_FEATURE (cache));
-    g_object_set_data_full (G_OBJECT (session), "libgweather-cache", g_object_ref (cache),
-                           (GDestroyNotify) dump_and_unref_cache);
+    if (cache != NULL) {
+       soup_session_add_feature (session, SOUP_SESSION_FEATURE (cache));
+       g_object_set_data_full (G_OBJECT (session), "libgweather-cache", g_object_ref (cache),
+                               (GDestroyNotify) dump_and_unref_cache);
 
-    soup_cache_load (cache);
-    g_object_unref (cache);
+       soup_cache_load (cache);
+       g_object_unref (cache);
+    }
 
     static_session = session;
     g_object_add_weak_pointer (G_OBJECT (session), (void**) &static_session);