%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*- %% ex: ts=4 sw=4 et %% ------------------------------------------------------------------- %% %% rebar: Erlang Build Tools %% %% Copyright (c) 2009, 2010 Dave Smith (dizzyd@dizzyd.com) %% %% Permission is hereby granted, free of charge, to any person obtaining a copy %% of this software and associated documentation files (the "Software"), to deal %% in the Software without restriction, including without limitation the rights %% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell %% copies of the Software, and to permit persons to whom the Software is %% furnished to do so, subject to the following conditions: %% %% The above copyright notice and this permission notice shall be included in %% all copies or substantial portions of the Software. %% %% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR %% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, %% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE %% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER %% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, %% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN %% THE SOFTWARE. %% ------------------------------------------------------------------- -module(rebar_utils). -export([sort_deps/1, droplast/1, filtermap/2, is_arch/1, sh/2, sh_send/3, abort/0, abort/2, escript_foldl/3, find_files/2, find_files/3, beam_to_mod/1, beam_to_mod/2, erl_to_mod/1, beams/1, find_executable/1, vcs_vsn/3, deprecated/3, deprecated/4, erl_opts/1, indent/1, update_code/1, remove_from_code_path/1, cleanup_code_path/1, args_to_tasks/1, expand_env_variable/3, get_arch/0, wordsize/0, tup_umerge/2, tup_sort/1, tup_find/2, line_count/1, set_httpc_options/0, escape_chars/1, escape_double_quotes/1, escape_double_quotes_weak/1]). %% for internal use only -export([otp_release/0]). -include("rebar.hrl"). -define(ONE_LEVEL_INDENT, " "). -define(APP_NAME_INDEX, 2). %% ==================================================================== %% Public API %% ==================================================================== sort_deps(Deps) -> %% We need a sort stable, based on the name. So that for multiple deps on %% the same level with the same name, we keep the order the parents had. %% `lists:keysort/2' is documented as stable in the stdlib. %% The list of deps is revered when we get it. For the proper stable %% result, re-reverse it. lists:keysort(?APP_NAME_INDEX, lists:reverse(Deps)). droplast(L) -> lists:reverse(tl(lists:reverse(L))). filtermap(F, [Hd|Tail]) -> case F(Hd) of true -> [Hd|filtermap(F, Tail)]; {true,Val} -> [Val|filtermap(F, Tail)]; false -> filtermap(F, Tail) end; filtermap(F, []) when is_function(F, 1) -> []. is_arch(ArchRegex) -> case re:run(get_arch(), ArchRegex, [{capture, none}]) of match -> true; nomatch -> false end. get_arch() -> Words = wordsize(), otp_release() ++ "-" ++ erlang:system_info(system_architecture) ++ "-" ++ Words. wordsize() -> try erlang:system_info({wordsize, external}) of Val -> integer_to_list(8 * Val) catch error:badarg -> integer_to_list(8 * erlang:system_info(wordsize)) end. sh_send(Command0, String, Options0) -> ?INFO("sh_send info:\n\tcwd: ~p\n\tcmd: ~s < ~s\n", [rebar_dir:get_cwd(), Command0, String]), ?DEBUG("\topts: ~p\n", [Options0]), DefaultOptions = [use_stdout, abort_on_error], Options = [expand_sh_flag(V) || V <- proplists:compact(Options0 ++ DefaultOptions)], Command = lists:flatten(patch_on_windows(Command0, proplists:get_value(env, Options, []))), PortSettings = proplists:get_all_values(port_settings, Options) ++ [exit_status, {line, 16384}, use_stdio, stderr_to_stdout, hide], Port = open_port({spawn, Command}, PortSettings), try %% allow us to send some data to the shell command's STDIN %% Erlang doesn't let us get any reply after sending an EOF, though... Port ! {self(), {command, String}} after port_close(Port) end. %% %% Options = [Option] -- defaults to [use_stdout, abort_on_error] %% Option = ErrorOption | OutputOption | {cd, string()} | {env, Env} %% ErrorOption = return_on_error | abort_on_error | {abort_on_error, string()} %% OutputOption = use_stdout | {use_stdout, bool()} %% Env = [{string(), Val}] %% Val = string() | false %% sh(Command0, Options0) -> ?DEBUG("sh info:\n\tcwd: ~p\n\tcmd: ~s\n", [rebar_dir:get_cwd(), Command0]), ?DEBUG("\topts: ~p\n", [Options0]), DefaultOptions = [{use_stdout, false}, debug_and_abort_on_error], Options = [expand_sh_flag(V) || V <- proplists:compact(Options0 ++ DefaultOptions)], ErrorHandler = proplists:get_value(error_handler, Options), OutputHandler = proplists:get_value(output_handler, Options), Command = lists:flatten(patch_on_windows(Command0, proplists:get_value(env, Options, []))), PortSettings = proplists:get_all_values(port_settings, Options) ++ [exit_status, {line, 16384}, use_stdio, stderr_to_stdout, hide, eof], ?DEBUG("Port Cmd: ~s\nPort Opts: ~p\n", [Command, PortSettings]), Port = open_port({spawn, Command}, PortSettings), try case sh_loop(Port, OutputHandler, []) of {ok, _Output} = Ok -> Ok; {error, {_Rc, _Output}=Err} -> ErrorHandler(Command, Err) end after port_close(Port) end. find_files(Dir, Regex) -> find_files(Dir, Regex, true). find_files(Dir, Regex, Recursive) -> filelib:fold_files(Dir, Regex, Recursive, fun(F, Acc) -> [F | Acc] end, []). find_executable(Name) -> case os:find_executable(Name) of false -> false; Path -> "\"" ++ filename:nativename(Path) ++ "\"" end. deprecated(Old, New, Opts, When) when is_list(Opts) -> case lists:member(Old, Opts) of true -> deprecated(Old, New, When); false -> ok end; deprecated(Old, New, Config, When) -> case rebar_state:get(Config, Old, undefined) of undefined -> ok; _ -> deprecated(Old, New, When) end. deprecated(Old, New, When) -> io:format( <<"WARNING: deprecated ~p option used~n" "Option '~p' has been deprecated~n" "in favor of '~p'.~n" "'~p' will be removed ~s.~n">>, [Old, Old, New, Old, When]). %% @doc Return list of erl_opts -spec erl_opts(rebar_state:t()) -> list(). erl_opts(Config) -> RawErlOpts = filter_defines(rebar_state:get(Config, erl_opts, []), []), Defines = [{d, list_to_atom(D)} || D <- rebar_state:get(Config, defines, [])], Opts = Defines ++ RawErlOpts, case proplists:is_defined(no_debug_info, Opts) of true -> [O || O <- Opts, O =/= no_debug_info]; false -> [debug_info|Opts] end. %% for use by `do` task %% note: this does not handle the case where you have an argument that %% was enclosed in quotes and might have commas but should not be split. args_to_tasks(Args) -> new_task(Args, []). %% Sort the list in proplist-order, meaning that `{a,b}' and `{a,c}' %% both compare as usual, and `a' and `b' do the same, but `a' and `{a,b}' will %% compare based on the first element of the key, and in order. So the following %% list will sort as: %% - `[native, {native,o3}, check]' -> `[check, native, {native, o3}]' %% - `[native, {native,o3}, {native, o2}, check]' -> `[check,native,{native,o3},{native,o2}]' %% Meaning that: %% a) no deduplication takes place %% b) the key of a tuple is what counts in being sorted, but atoms are seen as {atom} %% as far as comparison is concerned (departing from lists:ukeysort/2) %% c) order is preserved for similar keys and tuples no matter their size (sort is stable) %% %% These properties let us merge proplists fairly easily. tup_sort(List) -> lists:sort(fun(A, B) when is_tuple(A), is_tuple(B) -> element(1, A) =< element(1, B) ; (A, B) when is_tuple(A) -> element(1, A) =< B ; (A, B) when is_tuple(B) -> A =< element(1, B) ; (A, B) -> A =< B end, List). %% Custom merge functions. The objective is to behave like lists:umerge/2, %% except that we also compare the merge elements based on the key if they're a %% tuple, such that `{key, val1}' is always prioritized over `{key, val0}' if %% the former is from the 'new' list. %% %% This lets us apply proper overrides to list of elements according to profile %% priority. This function depends on a stable proplist sort. tup_umerge([], Olds) -> Olds; tup_umerge([New|News], Olds) -> lists:reverse(umerge(News, Olds, [], New)). tup_find(_Elem, []) -> false; tup_find(Elem, [Elem | _Elems]) -> Elem; tup_find(Elem, [Elem1 | Elems]) when is_tuple(Elem1) -> case element(1, Elem1) =:= Elem of true -> Elem1; false -> tup_find(Elem, Elems) end; tup_find(Elem, [_Elem | Elems]) -> tup_find(Elem, Elems). %% This is equivalent to umerge2_2 in the stdlib, except we use the expanded %% value/key only to compare umerge(News, [Old|Olds], Merged, Cmp) when element(1, Cmp) == element(1, Old); element(1, Cmp) == Old; Cmp == element(1, Old); Cmp =< Old -> umerge(News, Olds, [Cmp | Merged], Cmp, Old); umerge(News, [Old|Olds], Merged, Cmp) -> umerge(News, Olds, [Old | Merged], Cmp); umerge(News, [], Merged, Cmp) -> lists:reverse(News, [Cmp | Merged]). %% Similar to stdlib's umerge2_1 in the stdlib, except that when the expanded %% value/keys compare equal, we check if the element is a full dupe to clear it %% (like the stdlib function does) or otherwise keep the duplicate around in %% an order that prioritizes 'New' elements. umerge([New|News], Olds, Merged, CmpMerged, Cmp) when CmpMerged == Cmp -> umerge(News, Olds, Merged, New); umerge([New|News], Olds, Merged, _CmpMerged, Cmp) when element(1,New) == element(1, Cmp); element(1,New) == Cmp; New == element(1, Cmp); New =< Cmp -> umerge(News, Olds, [New | Merged], New, Cmp); umerge([New|News], Olds, Merged, _CmpMerged, Cmp) -> % > umerge(News, Olds, [Cmp | Merged], New); umerge([], Olds, Merged, CmpMerged, Cmp) when CmpMerged == Cmp -> lists:reverse(Olds, Merged); umerge([], Olds, Merged, _CmpMerged, Cmp) -> lists:reverse(Olds, [Cmp | Merged]). %% Implements wc -l functionality used to determine patchcount from git output line_count(PatchLines) -> Tokenized = string:tokens(PatchLines, "\n"), {ok, length(Tokenized)}. %% ==================================================================== %% Internal functions %% ==================================================================== otp_release() -> otp_release1(erlang:system_info(otp_release)). %% If OTP <= R16, otp_release is already what we want. otp_release1([$R,N|_]=Rel) when is_integer(N) -> Rel; %% If OTP >= 17.x, erlang:system_info(otp_release) returns just the %% major version number, we have to read the full version from %% a file. See http://www.erlang.org/doc/system_principles/versions.html %% Read vsn string from the 'OTP_VERSION' file and return as list without %% the "\n". otp_release1(Rel) -> File = filename:join([code:root_dir(), "releases", Rel, "OTP_VERSION"]), case file:read_file(File) of {error, _} -> Rel; {ok, Vsn} -> %% It's fine to rely on the binary module here because we can %% be sure that it's available when the otp_release string does %% not begin with $R. Size = byte_size(Vsn), %% The shortest vsn string consists of at least two digits %% followed by "\n". Therefore, it's safe to assume Size >= 3. case binary:part(Vsn, {Size, -3}) of <<"**\n">> -> %% The OTP documentation mentions that a system patched %% using the otp_patch_apply tool available to licensed %% customers will leave a '**' suffix in the version as a %% flag saying the system consists of application versions %% from multiple OTP versions. We ignore this flag and %% drop the suffix, given for all intents and purposes, we %% cannot obtain relevant information from it as far as %% tooling is concerned. binary:bin_to_list(Vsn, {0, Size - 3}); _ -> binary:bin_to_list(Vsn, {0, Size - 1}) end end. %% We do the shell variable substitution ourselves on Windows and hope that the %% command doesn't use any other shell magic. patch_on_windows(Cmd, Env) -> case os:type() of {win32,nt} -> Cmd1 = "cmd /q /c " ++ lists:foldl(fun({Key, Value}, Acc) -> expand_env_variable(Acc, Key, Value) end, Cmd, Env), %% Remove left-over vars re:replace(Cmd1, "\\\$\\w+|\\\${\\w+}", "", [global, {return, list}]); _ -> Cmd end. %% %% Given env. variable FOO we want to expand all references to %% it in InStr. References can have two forms: $FOO and ${FOO} %% The end of form $FOO is delimited with whitespace or eol %% expand_env_variable(InStr, VarName, RawVarValue) -> case string:chr(InStr, $$) of 0 -> %% No variables to expand InStr; _ -> ReOpts = [global, unicode, {return, list}], VarValue = re:replace(RawVarValue, "\\\\", "\\\\\\\\", ReOpts), %% Use a regex to match/replace: %% Given variable "FOO": match $FOO\s | $FOOeol | ${FOO} RegEx = io_lib:format("\\\$(~s(\\W|$)|{~s})", [VarName, VarName]), re:replace(InStr, RegEx, [VarValue, "\\2"], ReOpts) end. expand_sh_flag(return_on_error) -> {error_handler, fun(_Command, Err) -> {error, Err} end}; expand_sh_flag(abort_on_error) -> {error_handler, fun log_and_abort/2}; expand_sh_flag({abort_on_error, Message}) -> {error_handler, log_msg_and_abort(Message)}; expand_sh_flag({debug_abort_on_error, Message}) -> {error_handler, debug_log_msg_and_abort(Message)}; expand_sh_flag(debug_and_abort_on_error) -> {error_handler, fun debug_and_abort/2}; expand_sh_flag(use_stdout) -> {output_handler, fun(Line, Acc) -> %% Line already has a newline so don't use ?CONSOLE which adds one io:format("~s", [Line]), [Line | Acc] end}; expand_sh_flag({use_stdout, false}) -> {output_handler, fun(Line, Acc) -> [Line | Acc] end}; expand_sh_flag({cd, _CdArg} = Cd) -> {port_settings, Cd}; expand_sh_flag({env, _EnvArg} = Env) -> {port_settings, Env}. -type err_handler() :: fun((string(), {integer(), string()}) -> no_return()). -spec log_msg_and_abort(string()) -> err_handler(). log_msg_and_abort(Message) -> fun(_Command, {_Rc, _Output}) -> ?ABORT(Message, []) end. debug_log_msg_and_abort(Message) -> fun(Command, {Rc, Output}) -> ?DEBUG("sh(~s)~n" "failed with return code ~w and the following output:~n" "~s", [Command, Rc, Output]), ?ABORT(Message, []) end. -spec log_and_abort(string(), {integer(), string()}) -> no_return(). log_and_abort(Command, {Rc, Output}) -> ?ABORT("sh(~s)~n" "failed with return code ~w and the following output:~n" "~s", [Command, Rc, Output]). -spec debug_and_abort(string(), {integer(), string()}) -> no_return(). debug_and_abort(Command, {Rc, Output}) -> ?DEBUG("sh(~s)~n" "failed with return code ~w and the following output:~n" "~s", [Command, Rc, Output]), throw(rebar_abort). sh_loop(Port, Fun, Acc) -> receive {Port, {data, {eol, Line}}} -> sh_loop(Port, Fun, Fun(Line ++ "\n", Acc)); {Port, {data, {noeol, Line}}} -> sh_loop(Port, Fun, Fun(Line, Acc)); {Port, eof} -> Data = lists:flatten(lists:reverse(Acc)), receive {Port, {exit_status, 0}} -> {ok, Data}; {Port, {exit_status, Rc}} -> {error, {Rc, Data}} end end. beam_to_mod(Dir, Filename) -> [Dir | Rest] = filename:split(Filename), list_to_atom(filename:basename(string:join(Rest, "."), ".beam")). beam_to_mod(Filename) -> list_to_atom(filename:basename(Filename, ".beam")). erl_to_mod(Filename) -> list_to_atom(filename:rootname(filename:basename(Filename))). beams(Dir) -> filelib:wildcard(filename:join(Dir, "*.beam")). -spec abort() -> no_return(). abort() -> throw(rebar_abort). -spec abort(string(), [term()]) -> no_return(). abort(String, Args) -> ?ERROR(String, Args), abort(). escript_foldl(Fun, Acc, File) -> case escript:extract(File, [compile_source]) of {ok, [_Shebang, _Comment, _EmuArgs, Body]} -> case Body of {source, BeamCode} -> GetInfo = fun() -> file:read_file_info(File) end, GetBin = fun() -> BeamCode end, {ok, Fun(".", GetInfo, GetBin, Acc)}; {beam, BeamCode} -> GetInfo = fun() -> file:read_file_info(File) end, GetBin = fun() -> BeamCode end, {ok, Fun(".", GetInfo, GetBin, Acc)}; {archive, ArchiveBin} -> zip:foldl(Fun, Acc, {File, ArchiveBin}) end; {error, _} = Error -> Error end. vcs_vsn(Vcs, Dir, Resources) -> case vcs_vsn_cmd(Vcs, Dir, Resources) of {plain, VsnString} -> VsnString; {cmd, CmdString} -> vcs_vsn_invoke(CmdString, Dir); unknown -> ?ABORT("vcs_vsn: Unknown vsn format: ~p", [Vcs]); {error, Reason} -> ?ABORT("vcs_vsn: ~s", [Reason]) end. %% Temp work around for repos like relx that use "semver" vcs_vsn_cmd(VCS, Dir, Resources) when VCS =:= semver ; VCS =:= "semver" -> vcs_vsn_cmd(git, Dir, Resources); vcs_vsn_cmd({cmd, _Cmd}=Custom, _, _) -> Custom; vcs_vsn_cmd(VCS, Dir, Resources) when is_atom(VCS) -> case find_resource_module(VCS, Resources) of {ok, Module} -> Module:make_vsn(Dir); {error, _} -> unknown end; vcs_vsn_cmd(VCS, Dir, Resources) when is_list(VCS) -> try list_to_existing_atom(VCS) of AVCS -> case vcs_vsn_cmd(AVCS, Dir, Resources) of unknown -> {plain, VCS}; Other -> Other end catch error:badarg -> {plain, VCS} end; vcs_vsn_cmd(_, _, _) -> unknown. vcs_vsn_invoke(Cmd, Dir) -> {ok, VsnString} = rebar_utils:sh(Cmd, [{cd, Dir}, {use_stdout, false}]), string:strip(VsnString, right, $\n). find_resource_module(Type, Resources) -> case lists:keyfind(Type, 1, Resources) of false -> case code:which(Type) of non_existing -> {error, unknown}; _ -> {ok, Type} end; {Type, Module} -> {ok, Module} end. %% %% Filter a list of erl_opts platform_define options such that only %% those which match the provided architecture regex are returned. %% filter_defines([], Acc) -> lists:reverse(Acc); filter_defines([{platform_define, ArchRegex, Key} | Rest], Acc) -> case rebar_utils:is_arch(ArchRegex) of true -> filter_defines(Rest, [{d, Key} | Acc]); false -> filter_defines(Rest, Acc) end; filter_defines([{platform_define, ArchRegex, Key, Value} | Rest], Acc) -> case rebar_utils:is_arch(ArchRegex) of true -> filter_defines(Rest, [{d, Key, Value} | Acc]); false -> filter_defines(Rest, Acc) end; filter_defines([Opt | Rest], Acc) -> filter_defines(Rest, [Opt | Acc]). %% @doc ident to the level specified -spec indent(non_neg_integer()) -> iolist(). indent(Amount) when erlang:is_integer(Amount) -> [?ONE_LEVEL_INDENT || _ <- lists:seq(1, Amount)]. %% Replace code paths with new paths for existing apps and %% purge code of the old modules from those apps. update_code(Paths) -> lists:foreach(fun(Path) -> Name = filename:basename(Path, "/ebin"), App = list_to_atom(Name), application:load(App), case application:get_key(App, modules) of undefined -> code:add_patha(Path), ok; {ok, Modules} -> code:replace_path(Name, Path), [begin code:purge(M), code:delete(M) end || M <- Modules] end end, Paths). remove_from_code_path(Paths) -> lists:foreach(fun(Path) -> Name = filename:basename(Path, "/ebin"), App = list_to_atom(Name), application:load(App), case application:get_key(App, modules) of undefined -> application:unload(App), ok; {ok, Modules} -> application:unload(App), [begin code:purge(M), code:delete(M) end || M <- Modules] end, code:del_path(Path) end, Paths). cleanup_code_path(OrigPath) -> CurrentPath = code:get_path(), AddedPaths = CurrentPath -- OrigPath, %% If someone has removed paths, it's hard to get them back into %% the right order, but since this is currently rare, we can just %% fall back to code:set_path/1. case CurrentPath -- AddedPaths of OrigPath -> _ = [code:del_path(Path) || Path <- AddedPaths], true; _ -> code:set_path(OrigPath) end. new_task([], Acc) -> lists:reverse(Acc); new_task([TaskList|Rest], Acc) -> case re:split(TaskList, ",", [{return, list}, {parts, 2}]) of %% `do` consumes all remaining args ["do" = Task] -> lists:reverse([{Task, Rest}|Acc]); %% single task terminated by a comma [Task, ""] -> new_task(Rest, [{Task, []}|Acc]); %% sequence of two or more tasks [Task, More] -> new_task([More|Rest], [{Task, []}|Acc]); %% single task not terminated by a comma [Task] -> arg_or_flag(Rest, [{Task, []}|Acc]) end. arg_or_flag([], [{Task, Args}|Acc]) -> lists:reverse([{Task, lists:reverse(Args)}|Acc]); %% case where you have `foo , bar` arg_or_flag([","|Rest], Acc) -> new_task(Rest, Acc); %% case where you have `foo ,bar` arg_or_flag(["," ++ Task|Rest], Acc) -> new_task([Task|Rest], Acc); %% a flag arg_or_flag(["-" ++ _ = Flag|Rest], [{Task, Args}|Acc]) -> case maybe_ends_in_comma(Flag) of false -> arg_or_flag(Rest, [{Task, [Flag|Args]}|Acc]); NewFlag -> new_task(Rest, [{Task, lists:reverse([NewFlag|Args])}|Acc]) end; %% an argument or a sequence of arguments arg_or_flag([ArgList|Rest], [{Task, Args}|Acc]) -> case re:split(ArgList, ",", [{return, list}, {parts, 2}]) of %% single arg terminated by a comma [Arg, ""] -> new_task(Rest, [{Task, lists:reverse([Arg|Args])}|Acc]); %% sequence of two or more args/tasks [Arg, More] -> new_task([More|Rest], [{Task, lists:reverse([Arg|Args])}|Acc]); %% single arg not terminated by a comma [Arg] -> arg_or_flag(Rest, [{Task, [Arg|Args]}|Acc]) end. maybe_ends_in_comma(H) -> case lists:reverse(H) of "," ++ Flag -> lists:reverse(Flag); _ -> false end. get_http_vars(Scheme) -> GlobalConfigFile = rebar_dir:global_config(), Config = rebar_config:consult_file(GlobalConfigFile), proplists:get_value(Scheme, Config, []). set_httpc_options() -> set_httpc_options(https_proxy, get_http_vars(https_proxy)), set_httpc_options(proxy, get_http_vars(http_proxy)). set_httpc_options(_, []) -> ok; set_httpc_options(Scheme, Proxy) -> {ok, {_, _, Host, Port, _, _}} = http_uri:parse(Proxy), httpc:set_options([{Scheme, {{Host, Port}, []}}], rebar). %% escape\ as\ a\ shell\? escape_chars(Str) when is_atom(Str) -> escape_chars(atom_to_list(Str)); escape_chars(Str) -> re:replace(Str, "([ ()?`!$])", "\\\\&", [global, {return, list}]). %% "escape inside these" escape_double_quotes(Str) -> re:replace(Str, "([\"\\\\`!$*])", "\\\\&", [global, {return, list}]). %% "escape inside these" but allow * escape_double_quotes_weak(Str) -> re:replace(Str, "([\"\\\\`!$])", "\\\\&", [global, {return, list}]).