[ostree] core: Pull diff functionality out into "diff" builtin



commit 1513f29495eb7a49b615cdaf11508f12ca1a620a
Author: Colin Walters <walters verbum org>
Date:   Tue Mar 6 09:10:48 2012 -0500

    core: Pull diff functionality out into "diff" builtin
    
    There's no good reason for this to be in core when it's only in use by
    the diff builtin.

 src/libostree/ostree-repo.c  |  350 ------------------------------------------
 src/libostree/ostree-repo.h  |   25 ---
 src/ostree/ot-builtin-diff.c |  346 ++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 341 insertions(+), 380 deletions(-)
---
diff --git a/src/libostree/ostree-repo.c b/src/libostree/ostree-repo.c
index 0ff30b1..8087f06 100644
--- a/src/libostree/ostree-repo.c
+++ b/src/libostree/ostree-repo.c
@@ -2620,320 +2620,6 @@ ostree_repo_checkout_tree (OstreeRepo               *self,
   g_free (dest_path);
   return ret;
 }
-
-static gboolean
-get_file_checksum (GFile  *f,
-                   GFileInfo *f_info,
-                   char  **out_checksum,
-                   GCancellable *cancellable,
-                   GError   **error)
-{
-  gboolean ret = FALSE;
-  GChecksum *tmp_checksum = NULL;
-  char *ret_checksum = NULL;
-
-  if (OSTREE_IS_REPO_FILE (f))
-    {
-      ret_checksum = g_strdup (ostree_repo_file_get_checksum ((OstreeRepoFile*)f));
-    }
-  else
-    {
-      if (!ostree_checksum_file (f, OSTREE_OBJECT_TYPE_RAW_FILE,
-                                 &tmp_checksum, cancellable, error))
-        goto out;
-      ret_checksum = g_strdup (g_checksum_get_string (tmp_checksum));
-    }
-
-  ret = TRUE;
-  ot_transfer_out_value(out_checksum, &ret_checksum);
- out:
-  ot_clear_checksum (&tmp_checksum);
-  return ret;
-}
-
-OstreeRepoDiffItem *
-ostree_repo_diff_item_ref (OstreeRepoDiffItem *diffitem)
-{
-  g_atomic_int_inc (&diffitem->refcount);
-  return diffitem;
-}
-
-void
-ostree_repo_diff_item_unref (OstreeRepoDiffItem *diffitem)
-{
-  if (!g_atomic_int_dec_and_test (&diffitem->refcount))
-    return;
-
-  g_clear_object (&diffitem->src);
-  g_clear_object (&diffitem->target);
-  g_clear_object (&diffitem->src_info);
-  g_clear_object (&diffitem->target_info);
-  g_free (diffitem->src_checksum);
-  g_free (diffitem->target_checksum);
-  g_free (diffitem);
-}
-
-static OstreeRepoDiffItem *
-diff_item_new (GFile          *a,
-               GFileInfo      *a_info,
-               GFile          *b,
-               GFileInfo      *b_info,
-               char           *checksum_a,
-               char           *checksum_b)
-{
-  OstreeRepoDiffItem *ret = g_new0 (OstreeRepoDiffItem, 1);
-  ret->refcount = 1;
-  ret->src = a ? g_object_ref (a) : NULL;
-  ret->src_info = a_info ? g_object_ref (a_info) : NULL;
-  ret->target = b ? g_object_ref (b) : NULL;
-  ret->target_info = b_info ? g_object_ref (b_info) : b_info;
-  ret->src_checksum = g_strdup (checksum_a);
-  ret->target_checksum = g_strdup (checksum_b);
-  return ret;
-}
-               
-
-static gboolean
-diff_files (GFile          *a,
-            GFileInfo      *a_info,
-            GFile          *b,
-            GFileInfo      *b_info,
-            OstreeRepoDiffItem **out_item,
-            GCancellable   *cancellable,
-            GError        **error)
-{
-  gboolean ret = FALSE;
-  char *checksum_a = NULL;
-  char *checksum_b = NULL;
-  OstreeRepoDiffItem *ret_item = NULL;
-
-  if (!get_file_checksum (a, a_info, &checksum_a, cancellable, error))
-    goto out;
-  if (!get_file_checksum (b, b_info, &checksum_b, cancellable, error))
-    goto out;
-
-  if (strcmp (checksum_a, checksum_b) != 0)
-    {
-      ret_item = diff_item_new (a, a_info, b, b_info,
-                                checksum_a, checksum_b);
-    }
-
-  ret = TRUE;
-  ot_transfer_out_value(out_item, &ret_item);
- out:
-  if (ret_item)
-    ostree_repo_diff_item_unref (ret_item);
-  g_free (checksum_a);
-  g_free (checksum_b);
-  return ret;
-}
-
-static gboolean
-diff_add_dir_recurse (GFile          *d,
-                      GPtrArray      *added,
-                      GCancellable   *cancellable,
-                      GError        **error)
-{
-  gboolean ret = FALSE;
-  GFileEnumerator *dir_enum = NULL;
-  GError *temp_error = NULL;
-  GFile *child = NULL;
-  GFileInfo *child_info = NULL;
-
-  dir_enum = g_file_enumerate_children (d, OSTREE_GIO_FAST_QUERYINFO, 
-                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
-                                        cancellable, 
-                                        error);
-  if (!dir_enum)
-    goto out;
-
-  while ((child_info = g_file_enumerator_next_file (dir_enum, cancellable, &temp_error)) != NULL)
-    {
-      const char *name;
-
-      name = g_file_info_get_name (child_info);
-
-      g_clear_object (&child);
-      child = g_file_get_child (d, name);
-
-      g_ptr_array_add (added, g_object_ref (child));
-
-      if (g_file_info_get_file_type (child_info) == G_FILE_TYPE_DIRECTORY)
-        {
-          if (!diff_add_dir_recurse (child, added, cancellable, error))
-            goto out;
-        }
-      
-      g_clear_object (&child_info);
-    }
-  if (temp_error != NULL)
-    {
-      g_propagate_error (error, temp_error);
-      goto out;
-    }
-
-  ret = TRUE;
- out:
-  g_clear_object (&child_info);
-  g_clear_object (&child);
-  g_clear_object (&dir_enum);
-  return ret;
-}
-
-static gboolean
-diff_dirs (GFile          *a,
-           GFile          *b,
-           GPtrArray      *modified,
-           GPtrArray      *removed,
-           GPtrArray      *added,
-           GCancellable   *cancellable,
-           GError        **error)
-{
-  gboolean ret = FALSE;
-  GFileEnumerator *dir_enum = NULL;
-  GError *temp_error = NULL;
-  GFile *child_a = NULL;
-  GFile *child_b = NULL;
-  GFileInfo *child_a_info = NULL;
-  GFileInfo *child_b_info = NULL;
-
-  dir_enum = g_file_enumerate_children (a, OSTREE_GIO_FAST_QUERYINFO, 
-                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
-                                        cancellable, 
-                                        error);
-  if (!dir_enum)
-    goto out;
-
-  while ((child_a_info = g_file_enumerator_next_file (dir_enum, cancellable, &temp_error)) != NULL)
-    {
-      const char *name;
-      GFileType child_a_type;
-      GFileType child_b_type;
-
-      name = g_file_info_get_name (child_a_info);
-
-      g_clear_object (&child_a);
-      child_a = g_file_get_child (a, name);
-      child_a_type = g_file_info_get_file_type (child_a_info);
-
-      g_clear_object (&child_b);
-      child_b = g_file_get_child (b, name);
-
-      g_clear_object (&child_b_info);
-      child_b_info = g_file_query_info (child_b, OSTREE_GIO_FAST_QUERYINFO,
-                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
-                                        cancellable,
-                                        &temp_error);
-      if (!child_b_info)
-        {
-          if (g_error_matches (temp_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
-            {
-              g_clear_error (&temp_error);
-              g_ptr_array_add (removed, g_object_ref (child_a));
-            }
-          else
-            {
-              g_propagate_error (error, temp_error);
-              goto out;
-            }
-        }
-      else
-        {
-          child_b_type = g_file_info_get_file_type (child_b_info);
-          if (child_a_type != child_b_type)
-            {
-              OstreeRepoDiffItem *diff_item = diff_item_new (child_a, child_a_info,
-                                                             child_b, child_b_info, NULL, NULL);
-              
-              g_ptr_array_add (modified, diff_item);
-            }
-          else
-            {
-              OstreeRepoDiffItem *diff_item = NULL;
-
-              if (!diff_files (child_a, child_a_info, child_b, child_b_info, &diff_item, cancellable, error))
-                goto out;
-              
-              if (diff_item)
-                g_ptr_array_add (modified, diff_item); /* Transfer ownership */
-
-              if (child_a_type == G_FILE_TYPE_DIRECTORY)
-                {
-                  if (!diff_dirs (child_a, child_b, modified,
-                                  removed, added, cancellable, error))
-                    goto out;
-                }
-            }
-        }
-      
-      g_clear_object (&child_a_info);
-    }
-  if (temp_error != NULL)
-    {
-      g_propagate_error (error, temp_error);
-      goto out;
-    }
-
-  g_clear_object (&dir_enum);
-  dir_enum = g_file_enumerate_children (b, OSTREE_GIO_FAST_QUERYINFO, 
-                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
-                                        cancellable, 
-                                        error);
-  if (!dir_enum)
-    goto out;
-
-  while ((child_b_info = g_file_enumerator_next_file (dir_enum, cancellable, &temp_error)) != NULL)
-    {
-      const char *name;
-
-      name = g_file_info_get_name (child_b_info);
-
-      g_clear_object (&child_a);
-      child_a = g_file_get_child (a, name);
-
-      g_clear_object (&child_b);
-      child_b = g_file_get_child (b, name);
-
-      g_clear_object (&child_a_info);
-      child_a_info = g_file_query_info (child_a, OSTREE_GIO_FAST_QUERYINFO,
-                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
-                                        cancellable,
-                                        &temp_error);
-      if (!child_a_info)
-        {
-          if (g_error_matches (temp_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
-            {
-              g_clear_error (&temp_error);
-              g_ptr_array_add (added, g_object_ref (child_b));
-              if (g_file_info_get_file_type (child_b_info) == G_FILE_TYPE_DIRECTORY)
-                {
-                  if (!diff_add_dir_recurse (child_b, added, cancellable, error))
-                    goto out;
-                }
-            }
-          else
-            {
-              g_propagate_error (error, temp_error);
-              goto out;
-            }
-        }
-    }
-  if (temp_error != NULL)
-    {
-      g_propagate_error (error, temp_error);
-      goto out;
-    }
-
-  ret = TRUE;
- out:
-  g_clear_object (&dir_enum);
-  g_clear_object (&child_a_info);
-  g_clear_object (&child_b_info);
-  g_clear_object (&child_a);
-  g_clear_object (&child_b);
-  return ret;
-}
-
 gboolean
 ostree_repo_read_commit (OstreeRepo *self,
                          const char *rev, 
@@ -2959,39 +2645,3 @@ ostree_repo_read_commit (OstreeRepo *self,
   g_clear_object (&ret_root);
   return ret;
 }
-                       
-gboolean
-ostree_repo_diff (OstreeRepo     *self,
-                  GFile          *src,
-                  GFile          *target,
-                  GPtrArray     **out_modified,
-                  GPtrArray     **out_removed,
-                  GPtrArray     **out_added,
-                  GCancellable   *cancellable,
-                  GError        **error)
-{
-  gboolean ret = FALSE;
-  GPtrArray *ret_modified = NULL;
-  GPtrArray *ret_removed = NULL;
-  GPtrArray *ret_added = NULL;
-
-  ret_modified = g_ptr_array_new_with_free_func ((GDestroyNotify)ostree_repo_diff_item_unref);
-  ret_removed = g_ptr_array_new_with_free_func ((GDestroyNotify)g_object_unref);
-  ret_added = g_ptr_array_new_with_free_func ((GDestroyNotify)g_object_unref);
-
-  if (!diff_dirs (src, target, ret_modified, ret_removed, ret_added, cancellable, error))
-    goto out;
-
-  ret = TRUE;
-  ot_transfer_out_value(out_modified, &ret_modified);
-  ot_transfer_out_value(out_removed, &ret_removed);
-  ot_transfer_out_value(out_added, &ret_added);
- out:
-  if (ret_modified)
-    g_ptr_array_free (ret_modified, TRUE);
-  if (ret_removed)
-    g_ptr_array_free (ret_removed, TRUE);
-  if (ret_added)
-    g_ptr_array_free (ret_added, TRUE);
-  return ret;
-}
diff --git a/src/libostree/ostree-repo.h b/src/libostree/ostree-repo.h
index 9166db7..5206f37 100644
--- a/src/libostree/ostree-repo.h
+++ b/src/libostree/ostree-repo.h
@@ -220,31 +220,6 @@ gboolean       ostree_repo_read_commit (OstreeRepo *self,
                                         GCancellable *cancellable,
                                         GError  **error);
 
-typedef struct {
-  volatile gint refcount;
-
-  GFile *src;
-  GFile *target;
-
-  GFileInfo *src_info;
-  GFileInfo *target_info;
-
-  char *src_checksum;
-  char *target_checksum;
-} OstreeRepoDiffItem;
-
-OstreeRepoDiffItem *ostree_repo_diff_item_ref (OstreeRepoDiffItem *diffitem);
-void ostree_repo_diff_item_unref (OstreeRepoDiffItem *diffitem);
-
-gboolean      ostree_repo_diff (OstreeRepo     *self,
-                                GFile          *src,
-                                GFile          *target,
-                                GPtrArray     **out_modified, /* OstreeRepoDiffItem */
-                                GPtrArray     **out_removed, /* OstreeRepoDiffItem */
-                                GPtrArray     **out_added, /* OstreeRepoDiffItem */
-                                GCancellable   *cancellable,
-                                GError        **error);
-
 typedef void (*OstreeRepoObjectIter) (OstreeRepo *self, 
                                       const char *checksum,
                                       OstreeObjectType type,
diff --git a/src/ostree/ot-builtin-diff.c b/src/ostree/ot-builtin-diff.c
index c11605f..88c7912 100644
--- a/src/ostree/ot-builtin-diff.c
+++ b/src/ostree/ot-builtin-diff.c
@@ -61,11 +61,343 @@ parse_file_or_commit (OstreeRepo  *repo,
   return ret;
 }
 
+
+static gboolean
+get_file_checksum (GFile  *f,
+                   GFileInfo *f_info,
+                   char  **out_checksum,
+                   GCancellable *cancellable,
+                   GError   **error)
+{
+  gboolean ret = FALSE;
+  GChecksum *tmp_checksum = NULL;
+  char *ret_checksum = NULL;
+
+  if (OSTREE_IS_REPO_FILE (f))
+    {
+      ret_checksum = g_strdup (ostree_repo_file_get_checksum ((OstreeRepoFile*)f));
+    }
+  else
+    {
+      if (!ostree_checksum_file (f, OSTREE_OBJECT_TYPE_RAW_FILE,
+                                 &tmp_checksum, cancellable, error))
+        goto out;
+      ret_checksum = g_strdup (g_checksum_get_string (tmp_checksum));
+    }
+
+  ret = TRUE;
+  ot_transfer_out_value(out_checksum, &ret_checksum);
+ out:
+  ot_clear_checksum (&tmp_checksum);
+  return ret;
+}
+
+typedef struct {
+  volatile gint refcount;
+
+  GFile *src;
+  GFile *target;
+
+  GFileInfo *src_info;
+  GFileInfo *target_info;
+
+  char *src_checksum;
+  char *target_checksum;
+} DiffItem;
+
+DiffItem *diff_item_ref (DiffItem *diffitem);
+void diff_item_unref (DiffItem *diffitem);
+
+
+DiffItem *
+diff_item_ref (DiffItem *diffitem)
+{
+  g_atomic_int_inc (&diffitem->refcount);
+  return diffitem;
+}
+
+void
+diff_item_unref (DiffItem *diffitem)
+{
+  if (!g_atomic_int_dec_and_test (&diffitem->refcount))
+    return;
+
+  g_clear_object (&diffitem->src);
+  g_clear_object (&diffitem->target);
+  g_clear_object (&diffitem->src_info);
+  g_clear_object (&diffitem->target_info);
+  g_free (diffitem->src_checksum);
+  g_free (diffitem->target_checksum);
+  g_free (diffitem);
+}
+
+static DiffItem *
+diff_item_new (GFile          *a,
+               GFileInfo      *a_info,
+               GFile          *b,
+               GFileInfo      *b_info,
+               char           *checksum_a,
+               char           *checksum_b)
+{
+  DiffItem *ret = g_new0 (DiffItem, 1);
+  ret->refcount = 1;
+  ret->src = a ? g_object_ref (a) : NULL;
+  ret->src_info = a_info ? g_object_ref (a_info) : NULL;
+  ret->target = b ? g_object_ref (b) : NULL;
+  ret->target_info = b_info ? g_object_ref (b_info) : b_info;
+  ret->src_checksum = g_strdup (checksum_a);
+  ret->target_checksum = g_strdup (checksum_b);
+  return ret;
+}
+               
+
+static gboolean
+diff_files (GFile          *a,
+            GFileInfo      *a_info,
+            GFile          *b,
+            GFileInfo      *b_info,
+            DiffItem **out_item,
+            GCancellable   *cancellable,
+            GError        **error)
+{
+  gboolean ret = FALSE;
+  char *checksum_a = NULL;
+  char *checksum_b = NULL;
+  DiffItem *ret_item = NULL;
+
+  if (!get_file_checksum (a, a_info, &checksum_a, cancellable, error))
+    goto out;
+  if (!get_file_checksum (b, b_info, &checksum_b, cancellable, error))
+    goto out;
+
+  if (strcmp (checksum_a, checksum_b) != 0)
+    {
+      ret_item = diff_item_new (a, a_info, b, b_info,
+                                checksum_a, checksum_b);
+    }
+
+  ret = TRUE;
+  ot_transfer_out_value(out_item, &ret_item);
+ out:
+  if (ret_item)
+    diff_item_unref (ret_item);
+  g_free (checksum_a);
+  g_free (checksum_b);
+  return ret;
+}
+
+static gboolean
+diff_add_dir_recurse (GFile          *d,
+                      GPtrArray      *added,
+                      GCancellable   *cancellable,
+                      GError        **error)
+{
+  gboolean ret = FALSE;
+  GFileEnumerator *dir_enum = NULL;
+  GError *temp_error = NULL;
+  GFile *child = NULL;
+  GFileInfo *child_info = NULL;
+
+  dir_enum = g_file_enumerate_children (d, OSTREE_GIO_FAST_QUERYINFO, 
+                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                                        cancellable, 
+                                        error);
+  if (!dir_enum)
+    goto out;
+
+  while ((child_info = g_file_enumerator_next_file (dir_enum, cancellable, &temp_error)) != NULL)
+    {
+      const char *name;
+
+      name = g_file_info_get_name (child_info);
+
+      g_clear_object (&child);
+      child = g_file_get_child (d, name);
+
+      g_ptr_array_add (added, g_object_ref (child));
+
+      if (g_file_info_get_file_type (child_info) == G_FILE_TYPE_DIRECTORY)
+        {
+          if (!diff_add_dir_recurse (child, added, cancellable, error))
+            goto out;
+        }
+      
+      g_clear_object (&child_info);
+    }
+  if (temp_error != NULL)
+    {
+      g_propagate_error (error, temp_error);
+      goto out;
+    }
+
+  ret = TRUE;
+ out:
+  g_clear_object (&child_info);
+  g_clear_object (&child);
+  g_clear_object (&dir_enum);
+  return ret;
+}
+
+static gboolean
+diff_dirs (GFile          *a,
+           GFile          *b,
+           GPtrArray      *modified,
+           GPtrArray      *removed,
+           GPtrArray      *added,
+           GCancellable   *cancellable,
+           GError        **error)
+{
+  gboolean ret = FALSE;
+  GFileEnumerator *dir_enum = NULL;
+  GError *temp_error = NULL;
+  GFile *child_a = NULL;
+  GFile *child_b = NULL;
+  GFileInfo *child_a_info = NULL;
+  GFileInfo *child_b_info = NULL;
+
+  dir_enum = g_file_enumerate_children (a, OSTREE_GIO_FAST_QUERYINFO, 
+                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                                        cancellable, 
+                                        error);
+  if (!dir_enum)
+    goto out;
+
+  while ((child_a_info = g_file_enumerator_next_file (dir_enum, cancellable, &temp_error)) != NULL)
+    {
+      const char *name;
+      GFileType child_a_type;
+      GFileType child_b_type;
+
+      name = g_file_info_get_name (child_a_info);
+
+      g_clear_object (&child_a);
+      child_a = g_file_get_child (a, name);
+      child_a_type = g_file_info_get_file_type (child_a_info);
+
+      g_clear_object (&child_b);
+      child_b = g_file_get_child (b, name);
+
+      g_clear_object (&child_b_info);
+      child_b_info = g_file_query_info (child_b, OSTREE_GIO_FAST_QUERYINFO,
+                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                                        cancellable,
+                                        &temp_error);
+      if (!child_b_info)
+        {
+          if (g_error_matches (temp_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
+            {
+              g_clear_error (&temp_error);
+              g_ptr_array_add (removed, g_object_ref (child_a));
+            }
+          else
+            {
+              g_propagate_error (error, temp_error);
+              goto out;
+            }
+        }
+      else
+        {
+          child_b_type = g_file_info_get_file_type (child_b_info);
+          if (child_a_type != child_b_type)
+            {
+              DiffItem *diff_item = diff_item_new (child_a, child_a_info,
+                                                             child_b, child_b_info, NULL, NULL);
+              
+              g_ptr_array_add (modified, diff_item);
+            }
+          else
+            {
+              DiffItem *diff_item = NULL;
+
+              if (!diff_files (child_a, child_a_info, child_b, child_b_info, &diff_item, cancellable, error))
+                goto out;
+              
+              if (diff_item)
+                g_ptr_array_add (modified, diff_item); /* Transfer ownership */
+
+              if (child_a_type == G_FILE_TYPE_DIRECTORY)
+                {
+                  if (!diff_dirs (child_a, child_b, modified,
+                                  removed, added, cancellable, error))
+                    goto out;
+                }
+            }
+        }
+      
+      g_clear_object (&child_a_info);
+    }
+  if (temp_error != NULL)
+    {
+      g_propagate_error (error, temp_error);
+      goto out;
+    }
+
+  g_clear_object (&dir_enum);
+  dir_enum = g_file_enumerate_children (b, OSTREE_GIO_FAST_QUERYINFO, 
+                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                                        cancellable, 
+                                        error);
+  if (!dir_enum)
+    goto out;
+
+  while ((child_b_info = g_file_enumerator_next_file (dir_enum, cancellable, &temp_error)) != NULL)
+    {
+      const char *name;
+
+      name = g_file_info_get_name (child_b_info);
+
+      g_clear_object (&child_a);
+      child_a = g_file_get_child (a, name);
+
+      g_clear_object (&child_b);
+      child_b = g_file_get_child (b, name);
+
+      g_clear_object (&child_a_info);
+      child_a_info = g_file_query_info (child_a, OSTREE_GIO_FAST_QUERYINFO,
+                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                                        cancellable,
+                                        &temp_error);
+      if (!child_a_info)
+        {
+          if (g_error_matches (temp_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
+            {
+              g_clear_error (&temp_error);
+              g_ptr_array_add (added, g_object_ref (child_b));
+              if (g_file_info_get_file_type (child_b_info) == G_FILE_TYPE_DIRECTORY)
+                {
+                  if (!diff_add_dir_recurse (child_b, added, cancellable, error))
+                    goto out;
+                }
+            }
+          else
+            {
+              g_propagate_error (error, temp_error);
+              goto out;
+            }
+        }
+    }
+  if (temp_error != NULL)
+    {
+      g_propagate_error (error, temp_error);
+      goto out;
+    }
+
+  ret = TRUE;
+ out:
+  g_clear_object (&dir_enum);
+  g_clear_object (&child_a_info);
+  g_clear_object (&child_b_info);
+  g_clear_object (&child_a);
+  g_clear_object (&child_b);
+  return ret;
+}
+
 gboolean
 ostree_builtin_diff (int argc, char **argv, GFile *repo_path, GError **error)
 {
-  GOptionContext *context;
   gboolean ret = FALSE;
+  GOptionContext *context;
+  GCancellable *cancellable = NULL;
   OstreeRepo *repo = NULL;
   char *src_prev = NULL;
   const char *src;
@@ -112,17 +444,21 @@ ostree_builtin_diff (int argc, char **argv, GFile *repo_path, GError **error)
 
   cwd = ot_gfile_new_for_path (".");
 
-  if (!parse_file_or_commit (repo, src, &srcf, NULL, error))
+  if (!parse_file_or_commit (repo, src, &srcf, cancellable, error))
     goto out;
-  if (!parse_file_or_commit (repo, target, &targetf, NULL, error))
+  if (!parse_file_or_commit (repo, target, &targetf, cancellable, error))
     goto out;
+
+  modified = g_ptr_array_new_with_free_func ((GDestroyNotify)diff_item_unref);
+  removed = g_ptr_array_new_with_free_func ((GDestroyNotify)g_object_unref);
+  added = g_ptr_array_new_with_free_func ((GDestroyNotify)g_object_unref);
   
-  if (!ostree_repo_diff (repo, srcf, targetf, &modified, &removed, &added, NULL, error))
+  if (!diff_dirs (srcf, targetf, modified, removed, added, cancellable, error))
     goto out;
 
   for (i = 0; i < modified->len; i++)
     {
-      OstreeRepoDiffItem *diff = modified->pdata[i];
+      DiffItem *diff = modified->pdata[i];
       g_print ("M    %s\n", ot_gfile_get_path_cached (diff->src));
     }
   for (i = 0; i < removed->len; i++)



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