[planner] Migrate configuration data to XDG dirs.

[Luis Menina <lmenina src gnome org>]

commit d3b14d47cc97a43971f992db671f4a452cf71fb2
Author: Luis Menina <liberforce freeside fr>
Date:   Tue Jul 31 19:02:43 2012 +0200

    Migrate configuration data to XDG dirs.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=596173

 src/planner-main.c |   36 ++++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)
---
diff --git a/src/planner-main.c b/src/planner-main.c
index c0aabd2..18f196c 100644
--- a/src/planner-main.c
+++ b/src/planner-main.c
@@ -25,10 +25,15 @@
 #include <string.h>
 #include <gtk/gtk.h>
 #include <glib/gi18n.h>
+#include <glib.h>
+#include <glib/gstdio.h>
+#include <errno.h>
 #include "libplanner/mrp-paths.h"
 #include "planner-application.h"
 #include "planner-window.h"
 
+static gboolean migrate_config_to_xdg_dir (void);
+
 static PlannerApplication *application;
 
 /* Command line options */
@@ -70,6 +75,9 @@ main (int argc, char **argv)
 		return 1;
 	}
 
+	/* Migrate configuration if necessary */
+	migrate_config_to_xdg_dir ();
+
 	filename = mrp_paths_get_image_dir ("gnome-planner.png");
 	gtk_window_set_default_icon_from_file (filename, NULL);
 	g_free (filename);
@@ -130,3 +138,31 @@ main (int argc, char **argv)
 
         return 0;
 }
+
+static gboolean
+migrate_config_to_xdg_dir (void)
+{
+	gboolean success = FALSE;
+	gchar *xdg_dir, *old_dir;
+
+	old_dir = g_build_filename (g_get_home_dir (), ".gnome2", g_get_prgname (), NULL);
+	xdg_dir = g_build_filename (g_get_user_config_dir (), g_get_prgname (), NULL);
+
+	/* Migration required only if there's something to migrate,
+	 * and content has not been migrated yet */
+	if (g_file_test (old_dir, G_FILE_TEST_IS_DIR)
+			&& !g_file_test (xdg_dir, G_FILE_TEST_IS_DIR)) {
+		success = ((g_rename (old_dir, xdg_dir) == 0));
+		if (! success) {
+			g_warning ("Failed to migrate configuration directory to "
+					"'%s': %s\n",
+					xdg_dir,
+					g_strerror (errno));
+		}
+	}
+
+	g_free (xdg_dir);
+	g_free (old_dir);
+	return success;
+}
+