[ostree] admin: code cleanup

[Colin Walters <walters src gnome org>]

commit ee533d6ab9031f5e829a30f7aae134191c83bffa
Author: Colin Walters <walters verbum org>
Date:   Fri Nov 16 10:40:49 2012 -0500

    admin: code cleanup
    
    Refactor internal functions so they can be used by a later patch.

 src/ostree/ot-admin-functions.c |   82 +++++++++++++++++++++++++++-----------
 1 files changed, 58 insertions(+), 24 deletions(-)
---
diff --git a/src/ostree/ot-admin-functions.c b/src/ostree/ot-admin-functions.c
index 1d41826..85cd478 100644
--- a/src/ostree/ot-admin-functions.c
+++ b/src/ostree/ot-admin-functions.c
@@ -104,31 +104,20 @@ ot_admin_ensure_initialized (GFile         *ostree_dir,
   return ret;
 }
 
-/**
- * ot_admin_get_current_deployment:
- * 
- * Returns in @out_deployment the full file path of the current
- * deployment that the /ostree/current symbolic link points to, or
- * %NULL if none.
- */
-gboolean
-ot_admin_get_current_deployment (GFile           *ostree_dir,
-                                 GFile          **out_deployment,
-                                 GCancellable    *cancellable,
-                                 GError         **error)
+static gboolean
+query_file_info_allow_noent (GFile         *path,
+                             GFileInfo    **out_info,
+                             GCancellable  *cancellable,
+                             GError       **error)
 {
   gboolean ret = FALSE;
-  ot_lobj GFile *current_path = NULL;
-  ot_lobj GFileInfo *file_info = NULL;
-  ot_lobj GFile *ret_deployment = NULL;
+  ot_lobj GFileInfo *ret_file_info = NULL;
   GError *temp_error = NULL;
 
-  current_path = g_file_get_child (ostree_dir, "current");
-
-  file_info = g_file_query_info (current_path, OSTREE_GIO_FAST_QUERYINFO,
-                                 G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
-                                 cancellable, &temp_error);
-  if (!file_info)
+  ret_file_info = g_file_query_info (path, OSTREE_GIO_FAST_QUERYINFO,
+                                     G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                                     cancellable, &temp_error);
+  if (!ret_file_info)
     {
       if (g_error_matches (temp_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
         {
@@ -140,9 +129,34 @@ ot_admin_get_current_deployment (GFile           *ostree_dir,
           goto out;
         }
     }
-  else
+
+  ret = TRUE;
+  ot_transfer_out_value (out_info, &ret_file_info);
+ out:
+  return ret;
+}
+
+static gboolean
+query_symlink_target_allow_noent (GFile         *path,
+                                  GFile        **out_target,
+                                  GCancellable  *cancellable,
+                                  GError       **error)
+{
+  gboolean ret = FALSE;
+  ot_lobj GFileInfo *file_info = NULL;
+  ot_lobj GFile *ret_target = NULL;
+  ot_lobj GFile *path_parent = NULL;
+
+  if (!query_file_info_allow_noent (path, &file_info,
+                                    cancellable, error))
+    goto out;
+
+  path_parent = g_file_get_parent (path);
+
+  if (file_info != NULL)
     {
       const char *target;
+      
       if (g_file_info_get_file_type (file_info) != G_FILE_TYPE_SYMBOLIC_LINK)
         {
           g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
@@ -151,12 +165,32 @@ ot_admin_get_current_deployment (GFile           *ostree_dir,
         }
       target = g_file_info_get_symlink_target (file_info);
       g_assert (target);
-      ret_deployment = g_file_resolve_relative_path (ostree_dir, target);
+      ret_target = g_file_resolve_relative_path (path_parent, target);
     }
 
   ret = TRUE;
-  ot_transfer_out_value (out_deployment, &ret_deployment);
+  ot_transfer_out_value (out_target, &ret_target);
  out:
   return ret;
 }
 
+/**
+ * ot_admin_get_current_deployment:
+ * 
+ * Returns in @out_deployment the full file path of the current
+ * deployment that the /ostree/current symbolic link points to, or
+ * %NULL if none.
+ */
+gboolean
+ot_admin_get_current_deployment (GFile           *ostree_dir,
+                                 GFile          **out_deployment,
+                                 GCancellable    *cancellable,
+                                 GError         **error)
+{
+  ot_lobj GFile *current_path = NULL;
+
+  current_path = g_file_get_child (ostree_dir, "current");
+
+  return query_symlink_target_allow_noent (current_path, out_deployment,
+                                           cancellable, error);
+}