diff options
Diffstat (limited to 'src/rebar_agent.erl')
| -rw-r--r-- | src/rebar_agent.erl | 125 |
1 files changed, 101 insertions, 24 deletions
diff --git a/src/rebar_agent.erl b/src/rebar_agent.erl index 8d0f9cf..69e9b8e 100644 --- a/src/rebar_agent.erl +++ b/src/rebar_agent.erl @@ -131,40 +131,98 @@ maybe_show_warning(State) -> %% that makes sense. -spec refresh_paths(rebar_state:t()) -> ok. refresh_paths(RState) -> - ToRefresh = (rebar_state:code_paths(RState, all_deps) - ++ [filename:join([rebar_app_info:out_dir(App), "test"]) - || App <- rebar_state:project_apps(RState)] - %% make sure to never reload self; halt()s the VM - ) -- [filename:dirname(code:which(?MODULE))], + RefreshPaths = lists:usort( + application:get_env(rebar, refresh_paths, []) + ++ [all_deps, test]), + ToRefresh = parse_refresh_paths(RefreshPaths, RState), %% Modules from apps we can't reload without breaking functionality - Blacklist = [ec_cmd_log, providers, cf, cth_readable], + Blacklist = lists:usort( + application:get_env(rebar, refresh_paths_blacklist, []) + ++ [rebar, erlware_commons, providers, cf, cth_readable]), %% Similar to rebar_utils:update_code/1, but also forces a reload %% of used modules. Also forces to reload all of ebin/ instead %% of just the modules in the .app file, because 'extra_src_dirs' %% allows to load and compile files that are not to be kept %% in the app file. - lists:foreach(fun(Path) -> - Name = filename:basename(Path, "/ebin"), - Files = filelib:wildcard(filename:join([Path, "*.beam"])), - Modules = [list_to_atom(filename:basename(F, ".beam")) - || F <- Files], - App = list_to_atom(Name), + [refresh_path(Path, Blacklist) || Path <- ToRefresh], + ok. + +refresh_path(Path, Blacklist) -> + Name = filename:basename(Path, "/ebin"), + App = list_to_atom(Name), + case App of + test -> % skip + code:add_patha(Path), + ok; + _ -> application:load(App), case application:get_key(App, modules) of undefined -> - code:add_patha(Path), - ok; - {ok, Mods} -> - case {length(Mods), length(Mods -- Blacklist)} of - {X,X} -> - ?DEBUG("reloading ~p from ~ts", [Modules, Path]), - code:replace_path(App, Path), - reload_modules(Modules); - {_,_} -> + code:add_patha(Path); + {ok, _Mods} -> + case lists:member(App, Blacklist) of + false -> + refresh_path_do(Path, App); + true -> ?DEBUG("skipping app ~p, stable copy required", [App]) end end - end, ToRefresh). + end. +refresh_path_do(Path, App) -> + Files = filelib:wildcard(filename:join([Path, "*.beam"])), + Modules = [list_to_atom(filename:basename(F, ".beam")) + || F <- Files], + ?DEBUG("reloading ~p from ~ts", [Modules, Path]), + code:replace_path(App, Path), + reload_modules(Modules). + +%% @private parse refresh_paths option +%% no_deps means only project_apps's ebin path +%% no_test means no test path +%% OtherPath. +parse_refresh_paths(RefreshPaths0, RState) -> + RefreshPaths1 = + case lists:member(no_deps, RefreshPaths0) of + true -> + lists:usort([project_apps | lists:delete(all_deps, RefreshPaths0)]); + false -> + RefreshPaths0 + end, + RefreshPaths = + case lists:member(no_test, RefreshPaths1) of + true -> + lists:delete(test, RefreshPaths1); + false -> + RefreshPaths1 + end, + parse_refresh_paths(RefreshPaths, RState, []). +parse_refresh_paths([all_deps | RefreshPaths], RState, Acc) -> + Paths = rebar_state:code_paths(RState, all_deps), + parse_refresh_paths(RefreshPaths, RState, Paths ++ Acc); +parse_refresh_paths([project_apps | RefreshPaths], RState, Acc) -> + Paths = [filename:join([rebar_app_info:out_dir(App), "ebin"]) + || App <- rebar_state:project_apps(RState)], + parse_refresh_paths(RefreshPaths, RState, Paths ++ Acc); +parse_refresh_paths([test | RefreshPaths], RState, Acc) -> + Paths = [filename:join([rebar_app_info:out_dir(App), "test"]) + || App <- rebar_state:project_apps(RState)], + parse_refresh_paths(RefreshPaths, RState, Paths ++ Acc); +parse_refresh_paths([RefreshPath0 | RefreshPaths], RState, Acc) when is_list(RefreshPath0) -> + case filelib:is_dir(RefreshPath0) of + true -> + RefreshPath0 = + case filename:basename(RefreshPath0) of + "ebin" -> RefreshPath0; + _ -> filename:join([RefreshPath0, "ebin"]) + end, + parse_refresh_paths(RefreshPaths, RState, [RefreshPath0 | Acc]); + false -> + parse_refresh_paths(RefreshPaths, RState, Acc) + end; +parse_refresh_paths([_ | RefreshPaths], RState, Acc) -> + parse_refresh_paths(RefreshPaths, RState, Acc); +parse_refresh_paths([], _RState, Acc) -> + lists:usort(Acc). %% @private from a disk config, reload and reapply with the current %% profiles; used to find changes in the config from a prior run. @@ -179,8 +237,27 @@ refresh_state(RState, _Dir) -> %% @private takes a list of modules and reloads them -spec reload_modules([module()]) -> term(). reload_modules([]) -> noop; -reload_modules(Modules) -> - reload_modules(Modules, erlang:function_exported(code, prepare_loading, 1)). +reload_modules(Modules0) -> + Modules = [M || M <- Modules0, is_changed(M)], + reload_modules(Modules, erlang:function_exported(code, prepare_loading, 1)). + +%% @spec is_changed(atom()) -> boolean() +%% @doc true if the loaded module is a beam with a vsn attribute +%% and does not match the on-disk beam file, returns false otherwise. +is_changed(M) -> + try + module_vsn(M:module_info()) =/= module_vsn(code:get_object_code(M)) + catch _:_ -> + false + end. + +module_vsn({M, Beam, _Fn}) -> + {ok, {M, Vsn}} = beam_lib:version(Beam), + Vsn; +module_vsn(L) when is_list(L) -> + {_, Attrs} = lists:keyfind(attributes, 1, L), + {_, Vsn} = lists:keyfind(vsn, 1, Attrs), + Vsn. %% @private reloading modules, when there are modules to actually reload reload_modules(Modules, true) -> |