anchor.diff:  all() -> [default_src_dirs, default_extra_src_dirs, default_all_src_dirs,
             src_dirs, extra_src_dirs, all_src_dirs,
             profile_src_dirs, profile_extra_src_dirs, profile_all_src_dirs,
  -          retarget_path].
  +          retarget_path, alt_base_dir_abs, alt_base_dir_rel].
   
   init_per_testcase(_, Config) ->
       C = rebar_test_utils:init_rebar_state(Config),
  
positive.code:     ?assertEqual(filename:join([BaseDir, "some_other_dir"]),
                   rebar_dir:retarget_path(State, filename:join([rebar_dir:root_dir(State), "some_other_dir"]))),
      ?assertEqual("/somewhere/outside/the/project",
                   rebar_dir:retarget_path(State, "/somewhere/outside/the/project")).
negative.code: -export([default_src_dirs/1, default_extra_src_dirs/1, default_all_src_dirs/1]).
  -export([src_dirs/1, extra_src_dirs/1, all_src_dirs/1]).
  -export([profile_src_dirs/1, profile_extra_src_dirs/1, profile_all_src_dirs/1]).
  -export([retarget_path/1, alt_base_dir_abs/1, alt_base_dir_rel/1]).
  
  -include_lib("common_test/include/ct.hrl").
  -include_lib("eunit/include/eunit.hrl").
  