gnu: accountsservice: Provide a means to locate extensions.

* gnu/packages/patches/accountsservice-extensions.patch: New patch.
* gnu/packages/freedesktop.scm (accountsservice)[source]: Apply it.
[phases]{wrap-with-xdg-data-dirs}: New phase.

1 files changed, 25 insertions, 0 deletions

diff --git a/gnu/packages/patches/accountsservice-extensions.patch b/gnu/packages/patches/accountsservice-extensions.patch
new file mode 100644
index 0000000000..2cfab580e3
--- /dev/null
+++ b/gnu/packages/patches/accountsservice-extensions.patch
@@ -0,0 +1,25 @@
+Patch from NixOS retrieved from
+https://raw.githubusercontent.com/NixOS/nixpkgs/master/pkgs/development/libraries/accountsservice/drop-prefix-check-extensions.patch.
+
+diff --git a/src/extensions.c b/src/extensions.c
+index 038dcb2..830465d 100644
+--- a/src/extensions.c
++++ b/src/extensions.c
+@@ -121,16 +121,7 @@ daemon_read_extension_directory (GHashTable  *ifaces,
+                         continue;
+                 }
+ 
+-                /* Ensure it looks like "../../dbus-1/interfaces/${name}" */
+-                const gchar * const prefix = "../../dbus-1/interfaces/";
+-                if (g_str_has_prefix (symlink, prefix) && g_str_equal (symlink + strlen (prefix), name)) {
+-                        daemon_read_extension_file (ifaces, filename);
+-                }
+-                else {
+-                        g_warning ("Found accounts service vendor extension symlink %s, but it must be exactly "
+-                                   "equal to '../../dbus-1/interfaces/%s' for forwards-compatibility reasons.",
+-                                   filename, name);
+-                }
++                daemon_read_extension_file (ifaces, filename);
+         }
+ 
+         g_dir_close (dir);