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repo: Make the optimization for reusing checksums clearer
The code here is a bit hard to understand, so make it clearer by cleaning up the flow control and adding some comments. https://bugzilla.gnome.org/show_bug.cgi?id=707727
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@ -1466,27 +1466,34 @@ write_directory_to_mtree_internal (OstreeRepo *self,
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GError **error)
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{
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gboolean ret = FALSE;
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gboolean repo_dir_was_empty = FALSE;
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OstreeRepoCommitFilterResult filter_result;
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gs_unref_object OstreeRepoFile *repo_dir = NULL;
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OstreeRepoFile *repo_dir = NULL;
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gs_unref_object GFileEnumerator *dir_enum = NULL;
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gs_unref_object GFileInfo *child_info = NULL;
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g_debug ("Examining: %s", gs_file_get_path_cached (dir));
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/* We can only reuse checksums directly if there's no modifier */
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/* If the directory is already in the repository, we can try to
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* reuse checksums to skip checksumming. */
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if (OSTREE_IS_REPO_FILE (dir) && modifier == NULL)
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repo_dir = (OstreeRepoFile*)g_object_ref (dir);
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repo_dir = (OstreeRepoFile *) dir;
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if (repo_dir)
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{
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if (!ostree_repo_file_ensure_resolved (repo_dir, error))
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goto out;
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ostree_mutable_tree_set_metadata_checksum (mtree, ostree_repo_file_get_checksum (repo_dir));
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repo_dir_was_empty =
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g_hash_table_size (ostree_mutable_tree_get_files (mtree)) == 0
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&& g_hash_table_size (ostree_mutable_tree_get_subdirs (mtree)) == 0;
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ostree_mutable_tree_set_metadata_checksum (mtree, ostree_repo_file_tree_get_metadata_checksum (repo_dir));
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/* If the mtree was empty beforehand, the checksums on the mtree can simply
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* become the checksums on the tree in the repo. Super simple. */
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if (g_hash_table_size (ostree_mutable_tree_get_files (mtree)) == 0 &&
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g_hash_table_size (ostree_mutable_tree_get_subdirs (mtree)) == 0)
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{
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ostree_mutable_tree_set_contents_checksum (mtree, ostree_repo_file_tree_get_contents_checksum (repo_dir));
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ret = TRUE;
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goto out;
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}
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filter_result = OSTREE_REPO_COMMIT_FILTER_ALLOW;
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}
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@ -1632,9 +1639,6 @@ write_directory_to_mtree_internal (OstreeRepo *self,
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}
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}
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if (repo_dir && repo_dir_was_empty)
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ostree_mutable_tree_set_contents_checksum (mtree, ostree_repo_file_tree_get_contents_checksum (repo_dir));
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ret = TRUE;
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out:
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return ret;
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