[libpeas/meson.msvc: 17/19] Python Loader: Do not hardcode localedir on Windows

[Chun-wei Fan <fanchunwei src gnome org>]

commit 861cb1c34e12c1e35cb1c6beabce59a123cc3772
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Mon Oct 15 14:46:38 2018 +0800

    Python Loader: Do not hardcode localedir on Windows
    
    We construct them dynamically according to the path that the libpeas DLL
    is in, so that they can be relocated easily on Windows, which is often
    the case there.

 loaders/python/peas-python-internal.c  | 4 ++++
 loaders/python/peas-python-internal.py | 7 ++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)
---
diff --git a/loaders/python/peas-python-internal.c b/loaders/python/peas-python-internal.c
index 58891887..f15b941f 100644
--- a/loaders/python/peas-python-internal.c
+++ b/loaders/python/peas-python-internal.c
@@ -68,6 +68,7 @@ peas_python_internal_setup (gboolean already_initialized)
   PyObject *builtins_module, *globals, *result;
   PyObject *code = NULL, *failed_method = NULL;
   gboolean success = FALSE;
+  char *localedir = NULL;
 
 #define goto_error_if_failed(cond) \
   G_STMT_START { \
@@ -128,8 +129,11 @@ peas_python_internal_setup (gboolean already_initialized)
                                                     prgname) == 0);
   goto_error_if_failed (PyModule_AddStringMacro (internal_module,
                                                  GETTEXT_PACKAGE) == 0);
+
+#ifndef G_OS_WIN32
   goto_error_if_failed (PyModule_AddStringMacro (internal_module,
                                                  PEAS_LOCALEDIR) == 0);
+#endif
 
   globals = PyModule_GetDict (internal_module);
   result = PyEval_EvalCode ((gpointer) code, globals, globals);
diff --git a/loaders/python/peas-python-internal.py b/loaders/python/peas-python-internal.py
index 1a0a7457..86360b39 100644
--- a/loaders/python/peas-python-internal.py
+++ b/loaders/python/peas-python-internal.py
@@ -43,7 +43,12 @@ class Hooks(object):
 
         sys.argv = [PRGNAME]
 
-        gettext.install(GETTEXT_PACKAGE, PEAS_LOCALEDIR)
+        if os.name == 'nt':
+            basedir = GLib.win32_get_package_installation_directory_of_module(None)
+            peas_locale_dir = os.path.join (basedir, 'share', 'locale')
+            gettext.install(GETTEXT_PACKAGE, peas_locale_dir)
+        else:
+            gettext.install(GETTEXT_PACKAGE, PEAS_LOCALEDIR)
 
         self.__module_cache = {}
         self.__extension_cache = {}