[epiphany] ephy-profile-migrator: migrate Web Applications to new profile location

[Xan Lopez <xan src gnome org>]

commit dd510ece07f5e01debec5cd1605913cf7dec568d
Author: Xan Lopez <xan igalia com>
Date:   Wed May 9 12:24:06 2012 +0200

    ephy-profile-migrator: migrate Web Applications to new profile location
    
    We need to update their desktop files (they had references to the
    profile directory) and the symlink of the .desktop file in the Shell
    applications directory.
    
    It would be much easier to just delete and re-add the applications,
    but unfortunately that would wipe out the existing profile data in the
    apps (like cookies).

 lib/ephy-profile-migrator.c |   87 ++++++++++++++++++++++++++++++++++++++++++-
 lib/ephy-profile-utils.h    |    2 +-
 2 files changed, 87 insertions(+), 2 deletions(-)
---
diff --git a/lib/ephy-profile-migrator.c b/lib/ephy-profile-migrator.c
index ac5e184..ab933f0 100644
--- a/lib/ephy-profile-migrator.c
+++ b/lib/ephy-profile-migrator.c
@@ -37,6 +37,7 @@
 #include "ephy-history-service.h"
 #include "ephy-profile-utils.h"
 #include "ephy-settings.h"
+#include "ephy-web-app-utils.h"
 #ifdef ENABLE_NSS
 #include "ephy-nss-glue.h"
 #endif
@@ -677,6 +678,89 @@ migrate_profile_gnome2_to_xdg ()
   g_free (old_dir);
 }
 
+static char *
+fix_desktop_file_and_return_new_location (const char *dir)
+{
+  GRegex * regex;
+  char *result, *old_profile_dir, *replacement, *contents, *new_contents;
+  gsize length;
+
+  old_profile_dir = g_build_filename (g_get_home_dir (),
+                                      ".gnome2",
+                                      NULL);
+  replacement = g_build_filename (g_get_user_config_dir (),
+                                  NULL);
+  regex = g_regex_new (old_profile_dir, 0, 0, NULL);
+
+  /* We want to modify both the link destination and the contents of
+   * the .desktop file itself. */
+  result = g_regex_replace (regex, dir, -1,
+                            0, replacement, 0, NULL);
+  g_file_get_contents (result, &contents, &length, NULL);
+  new_contents = g_regex_replace (regex, contents, -1, 0,
+                                  replacement, 0, NULL);
+  g_file_set_contents (result, new_contents, length, NULL);
+
+  g_free (contents);
+  g_free (new_contents);
+  g_free (old_profile_dir);
+  g_free (replacement);
+
+  g_regex_unref (regex);
+
+  return result;
+}
+
+static void
+migrate_web_app_links ()
+{
+  GList *apps, *p;
+
+  apps = ephy_web_application_get_application_list ();
+  for (p = apps; p; p = p->next) {
+    char *desktop_file, *app_link;
+    EphyWebApplication *app = (EphyWebApplication*)p->data;
+
+    desktop_file = app->desktop_file;
+
+    /* Update the link in applications. */
+    app_link = g_build_filename (g_get_user_data_dir (), "applications", desktop_file, NULL);
+    if (g_file_test (app_link, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_SYMLINK)) {
+        /* Change the link to point to the new profile dir. */
+        GFileInfo *info;
+        const char *target;
+        GFile *file = g_file_new_for_path (app_link);
+        
+        info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_SYMLINK_TARGET,
+                                  0, NULL, NULL);
+        if (info) {
+          char *new_target;
+
+          target = g_file_info_get_symlink_target (info);
+          new_target = fix_desktop_file_and_return_new_location (target);
+
+          /* FIXME: Updating the file info and setting it again should
+           * work, but it does not? Just delete and create the link
+           * again. */
+          g_file_delete (file, 0, 0);
+          g_object_unref (file);
+
+          file = g_file_new_for_path (app_link);
+          g_file_make_symbolic_link (file, new_target, NULL, NULL);
+
+          g_object_unref (info);
+          g_free (new_target);
+        }
+
+        g_object_unref (file);
+    }
+
+    g_free (app_link);
+  }
+
+  ephy_web_application_free_application_list (apps);
+}
+
 const EphyProfileMigrator migrators[] = {
   migrate_cookies,
   migrate_passwords,
@@ -687,7 +771,8 @@ const EphyProfileMigrator migrators[] = {
    * login/passwords for page forms, which we previously ignored */
   migrate_passwords2,
   migrate_history,
-  migrate_tabs_visibility
+  migrate_tabs_visibility,
+  migrate_web_app_links
 };
 
 static void
diff --git a/lib/ephy-profile-utils.h b/lib/ephy-profile-utils.h
index 353a560..d26fe1c 100644
--- a/lib/ephy-profile-utils.h
+++ b/lib/ephy-profile-utils.h
@@ -26,7 +26,7 @@
 #define FORM_USERNAME_KEY "form_username"
 #define FORM_PASSWORD_KEY "form_password"
 
-#define EPHY_PROFILE_MIGRATION_VERSION 6
+#define EPHY_PROFILE_MIGRATION_VERSION 7
 
 int ephy_profile_utils_get_migration_version (void);