[gnome-builder] object: add more tracing and debug info

[Christian Hergert <chergert src gnome org>]

commit 89e99c4407fdee4245ceffb203eaca6f66f6b012
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jun 19 17:25:49 2017 -0700

    object: add more tracing and debug info
    
    This introduces some more debug info to help track things down. It also
    fixes an issue where we reported the wrong subsystem in an error message.

 libide/ide-object.c |   30 +++++++++++++++++++++++-------
 1 files changed, 23 insertions(+), 7 deletions(-)
---
diff --git a/libide/ide-object.c b/libide/ide-object.c
index caef09c..8e84158 100644
--- a/libide/ide-object.c
+++ b/libide/ide-object.c
@@ -43,6 +43,7 @@ typedef struct
 typedef struct
 {
   GPtrArray *plugins;
+  GType      plugin_type;
   gint       position;
   gint       io_priority;
 } InitExtensionAsyncState;
@@ -354,9 +355,11 @@ extension_init_cb (GObject      *object,
 {
   g_autoptr(GTask) task = user_data;
   GAsyncInitable *initable = (GAsyncInitable *)object;
-  GError *error = NULL;
+  g_autoptr(GError) error = NULL;
   InitExtensionAsyncState *state;
 
+  IDE_ENTRY;
+
   g_assert (G_IS_TASK (task));
   g_assert (G_IS_ASYNC_INITABLE (initable));
 
@@ -364,18 +367,24 @@ extension_init_cb (GObject      *object,
 
   if (!g_async_initable_init_finish (initable, result, &error))
     {
+      IDE_TRACE_MSG ("extension for %s failed to initialize: %s",
+                     G_OBJECT_TYPE_NAME (initable), error->message);
+
       if ((guint)state->position == state->plugins->len)
         {
-          g_task_return_error (task, error);
-          return;
+          g_task_return_error (task, g_steal_pointer (&error));
+          IDE_EXIT;
         }
 
-      g_clear_error (&error);
       ide_object_new_for_extension_async_try_next (task);
-      return;
+      IDE_EXIT;
     }
 
+  IDE_TRACE_MSG ("initialization of %s was successful", G_OBJECT_TYPE_NAME (initable));
+
   g_task_return_pointer (task, g_object_ref (initable), g_object_unref);
+
+  IDE_EXIT;
 }
 
 static void
@@ -384,17 +393,21 @@ ide_object_new_for_extension_async_try_next (GTask *task)
   InitExtensionAsyncState *state;
   GAsyncInitable *initable;
 
+  IDE_ENTRY;
+
   g_assert (G_IS_TASK (task));
 
   state = g_task_get_task_data (task);
 
   if ((guint)state->position == state->plugins->len)
     {
+      IDE_TRACE_MSG ("No more %s extensions to try", g_type_name (state->plugin_type));
       g_task_return_new_error (task,
                                G_IO_ERROR,
                                G_IO_ERROR_NOT_SUPPORTED,
-                               _("Failed to locate build system plugin."));
-      return;
+                               _("Failed to locate %s plugin."),
+                               g_type_name (state->plugin_type));
+      IDE_EXIT;
     }
 
   initable = g_ptr_array_index (state->plugins, state->position++);
@@ -406,6 +419,8 @@ ide_object_new_for_extension_async_try_next (GTask *task)
                                g_task_get_cancellable (task),
                                extension_init_cb,
                                g_object_ref (task));
+
+  IDE_EXIT;
 }
 
 /**
@@ -445,6 +460,7 @@ ide_object_new_for_extension_async (GType                 interface_gtype,
   state->plugins = g_ptr_array_new_with_free_func (g_object_unref);
   state->position = 0;
   state->io_priority = io_priority;
+  state->plugin_type = interface_gtype;
 
   peas_extension_set_foreach (set, extensions_foreach_cb, state);