[libgit2-glib] Add ggit_config_snapshot

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 1ba947cc2b2e695283f69c514a2ae018b986829f
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Fri Jul 31 00:54:38 2015 +0200

    Add ggit_config_snapshot

 libgit2-glib/ggit-config.c |   33 +++++++++++++++++++++++++++++++++
 libgit2-glib/ggit-config.h |    3 +++
 2 files changed, 36 insertions(+), 0 deletions(-)
---
diff --git a/libgit2-glib/ggit-config.c b/libgit2-glib/ggit-config.c
index a00b4e0..18cba01 100644
--- a/libgit2-glib/ggit-config.c
+++ b/libgit2-glib/ggit-config.c
@@ -782,4 +782,37 @@ ggit_config_match_foreach (GgitConfig               *config,
                                     error);
 }
 
+/**
+ * ggit_config_snapshot:
+ * @config: a #GgitConfig.
+ * @error: a #GError for error reporting, or %NULL.
+ *
+ * Create a snapshot of the current state of the configuration,
+ * which allows you to look into a consistent view of the configuration
+ * for looking up complex values (e.g. a remote, submodule).
+ *
+ * Returns: (transfer full): a new #GgitConfig, or %NULL if an error occurred.
+ *
+ **/
+GgitConfig *
+ggit_config_snapshot (GgitConfig  *config,
+                      GError     **error)
+{
+       git_config *retconf;
+       gint ret;
+
+       g_return_val_if_fail (GGIT_IS_CONFIG (config), NULL);
+       g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+       ret = git_config_snapshot (&retconf, _ggit_native_get (config));
+
+       if (ret != GIT_OK)
+       {
+               _ggit_error_set (error, ret);
+               return NULL;
+       }
+
+       return _ggit_config_wrap (retconf);
+}
+
 /* ex:set ts=8 noet: */
diff --git a/libgit2-glib/ggit-config.h b/libgit2-glib/ggit-config.h
index 1f825c9..4013bc0 100644
--- a/libgit2-glib/ggit-config.h
+++ b/libgit2-glib/ggit-config.h
@@ -105,6 +105,9 @@ gboolean     ggit_config_match_foreach (GgitConfig               *config,
                                         gpointer                  user_data,
                                         GError                  **error);
 
+GgitConfig  *ggit_config_snapshot      (GgitConfig               *config,
+                                        GError                  **error);
+
 GgitConfig  *_ggit_config_wrap         (git_config               *config);
 
 G_END_DECLS