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src/subversion/subversion/libsvn_repos/delta.c  view on Meta::CPAN

static svn_error_t *replace_file_or_dir(struct context *c,
                                        void *dir_baton,
                                        svn_depth_t depth,
                                        const char *source_path,
                                        const char *target_path,
                                        const char *edit_path,
                                        svn_node_kind_t tgt_kind,
                                        apr_pool_t *pool);

static svn_error_t *absent_file_or_dir(struct context *c,
                                       void *dir_baton,
                                       const char *edit_path,
                                       svn_node_kind_t tgt_kind,
                                       apr_pool_t *pool);

static svn_error_t *delta_dirs(struct context *c,
                               void *dir_baton,
                               svn_depth_t depth,
                               const char *source_path,
                               const char *target_path,
                               const char *edit_path,
                               apr_pool_t *pool);



#define MAYBE_DEMOTE_DEPTH(depth)                                  \
  (((depth) == svn_depth_immediates || (depth) == svn_depth_files) \
   ? svn_depth_empty                                               \
   : (depth))


/* Return the error 'SVN_ERR_AUTHZ_ROOT_UNREADABLE' if PATH in ROOT is
 * unreadable according to AUTHZ_READ_FUNC with AUTHZ_READ_BATON.
 *
 * PATH should be the implicit root path of an editor drive, that is,
 * the path used by editor->open_root().
 */
static svn_error_t *
authz_root_check(svn_fs_root_t *root,
                 const char *path,
                 svn_repos_authz_func_t authz_read_func,
                 void *authz_read_baton,
                 apr_pool_t *pool)
{
  svn_boolean_t allowed;

  if (authz_read_func)
    {
      SVN_ERR(authz_read_func(&allowed, root, path, authz_read_baton, pool));

      if (! allowed)
        return svn_error_create(SVN_ERR_AUTHZ_ROOT_UNREADABLE, 0,
                                _("Unable to open root of edit"));
    }

  return SVN_NO_ERROR;
}


static svn_error_t *
not_a_dir_error(const char *role,
                const char *path)
{
  return svn_error_createf
    (SVN_ERR_FS_NOT_DIRECTORY, 0,
     "Invalid %s directory '%s'",
     role, path ? path : "(null)");
}


/* Public interface to computing directory deltas.  */
svn_error_t *
svn_repos_dir_delta2(svn_fs_root_t *src_root,
                     const char *src_parent_dir,
                     const char *src_entry,
                     svn_fs_root_t *tgt_root,
                     const char *tgt_fullpath,
                     const svn_delta_editor_t *editor,
                     void *edit_baton,
                     svn_repos_authz_func_t authz_read_func,
                     void *authz_read_baton,
                     svn_boolean_t text_deltas,
                     svn_depth_t depth,
                     svn_boolean_t entry_props,
                     svn_boolean_t ignore_ancestry,
                     apr_pool_t *pool)
{
  void *root_baton = NULL;
  struct context c;
  const char *src_fullpath;
  const svn_fs_id_t *src_id, *tgt_id;
  svn_node_kind_t src_kind, tgt_kind;
  svn_revnum_t rootrev;
  int distance;
  const char *authz_root_path;

  /* SRC_PARENT_DIR must be valid. */
  if (src_parent_dir)
    src_parent_dir = svn_relpath_canonicalize(src_parent_dir, pool);
  else
    return not_a_dir_error("source parent", src_parent_dir);

  /* TGT_FULLPATH must be valid. */
  if (tgt_fullpath)
    tgt_fullpath = svn_relpath_canonicalize(tgt_fullpath, pool);
  else
    return svn_error_create(SVN_ERR_FS_PATH_SYNTAX, 0,
                            _("Invalid target path"));

  if (depth == svn_depth_exclude)
    return svn_error_create(SVN_ERR_REPOS_BAD_ARGS, NULL,
                            _("Delta depth 'exclude' not supported"));

  /* Calculate the fs path implicitly used for editor->open_root, so
     we can do an authz check on that path first. */
  if (*src_entry)
    authz_root_path = svn_relpath_dirname(tgt_fullpath, pool);
  else
    authz_root_path = tgt_fullpath;

  /* Construct the full path of the source item. */
  src_fullpath = svn_relpath_join(src_parent_dir, src_entry, pool);

  /* Get the node kinds for the source and target paths.  */
  SVN_ERR(svn_fs_check_path(&tgt_kind, tgt_root, tgt_fullpath, pool));
  SVN_ERR(svn_fs_check_path(&src_kind, src_root, src_fullpath, pool));

  /* If neither of our paths exists, we don't really have anything to do. */
  if ((tgt_kind == svn_node_none) && (src_kind == svn_node_none))
    goto cleanup;

  /* If either the source or the target is a non-directory, we
     require that a SRC_ENTRY be supplied. */
  if ((! *src_entry) && ((src_kind != svn_node_dir)
                         || tgt_kind != svn_node_dir))
    return svn_error_create
      (SVN_ERR_FS_PATH_SYNTAX, 0,
       _("Invalid editor anchoring; at least one of the "
         "input paths is not a directory and there was no source entry"));

  /* Set the global target revision if one can be determined. */
  if (svn_fs_is_revision_root(tgt_root))
    {
      SVN_ERR(editor->set_target_revision
              (edit_baton, svn_fs_revision_root_revision(tgt_root), pool));
    }
  else if (svn_fs_is_txn_root(tgt_root))
    {
      SVN_ERR(editor->set_target_revision
              (edit_baton, svn_fs_txn_root_base_revision(tgt_root), pool));
    }

  /* Setup our pseudo-global structure here.  We need these variables
     throughout the deltafication process, so pass them around by
     reference to all the helper functions. */
  c.editor = editor;
  c.source_root = src_root;
  c.target_root = tgt_root;
  c.authz_read_func = authz_read_func;
  c.authz_read_baton = authz_read_baton;
  c.text_deltas = text_deltas;