%% -*- tab-width: 4;erlang-indent-level: 4;indent-tabs-mode: nil -*- %% ex: ts=4 sw=4 et %% ------------------------------------------------------------------- %% %% rebar: Erlang Build Tools %% %% Copyright (c) 2009 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_core). -export([run/1]). -export([app_dir/1, rel_dir/1]). % Ugh -include("rebar.hrl"). -ifndef(BUILD_TIME). -define(BUILD_TIME, "undefined"). -endif. %% =================================================================== %% Public API %% =================================================================== run(["version"]) -> %% Load application spec and display vsn and build time info ok = application:load(rebar), {ok, Vsn} = application:get_key(rebar, vsn), ?CONSOLE("Version ~s built ~s\n", [Vsn, ?BUILD_TIME]), ok; run(RawArgs) -> %% Pre-load the rebar app so that we get default configuration ok = application:load(rebar), %% Parse out command line arguments -- what's left is a list of commands to %% run Commands = parse_args(RawArgs), %% Make sure crypto is running crypto:start(), %% Initialize logging system rebar_log:init(), %% Convert command strings to atoms CommandAtoms = [list_to_atom(C) || C <- Commands], %% Determine the location of the rebar executable; important for pulling %% resources out of the escript rebar_config:set_global(escript, filename:absname(escript:script_name())), ?DEBUG("Rebar location: ~p\n", [rebar_config:get_global(escript, undefined)]), %% Load rebar.config, if it exists process_dir(rebar_utils:get_cwd(), rebar_config:new(), CommandAtoms). %% =================================================================== %% Internal functions %% =================================================================== %% %% Parse command line arguments using getopt and also filtering out any %% key=value pairs. What's left is the list of commands to run %% parse_args(Args) -> %% Parse getopt options OptSpecList = option_spec_list(), case getopt:parse(OptSpecList, Args) of {ok, {_Options, []}} -> %% no command to run specified help(), halt(1); {ok, {Options, NonOptArgs}} -> case proplists:get_bool(help, Options) of true -> %% display help help(), halt(0); false -> %% Set global variables based on getopt options set_global_flag(Options, verbose), set_global_flag(Options, force), DefJobs = rebar_config:get_jobs(), case proplists:get_value(jobs, Options, DefJobs) of DefJobs -> ok; Jobs -> rebar_config:set_global(jobs, Jobs) end, %% Filter all the flags (i.e. strings of form key=value) from the %% command line arguments. What's left will be the commands to run. filter_flags(NonOptArgs, []) end; {error, {Reason, Data}} -> ?ERROR("Error: ~s ~p~n~n", [Reason, Data]), help(), halt(1) end. %% %% set global flag based on getopt option boolean value %% set_global_flag(Options, Flag) -> Value = case proplists:get_bool(Flag, Options) of true -> "1"; false -> "0" end, rebar_config:set_global(Flag, Value). %% %% print help/usage string %% help() -> OptSpecList = option_spec_list(), getopt:usage(OptSpecList, "rebar", "[var=value,...] ", [{"var=value", "rebar global variables (e.g. force=1)"}, {"command", "Command to run (e.g. compile)"}]). %% %% options accepted via getopt %% option_spec_list() -> Jobs = rebar_config:get_jobs(), JobsHelp = io_lib:format( "Number of concurrent workers a command may use. Default: ~B", [Jobs]), [ %% {Name, ShortOpt, LongOpt, ArgSpec, HelpMsg} {help, $h, "help", undefined, "Show the program options"}, {verbose, $v, "verbose", undefined, "Be verbose about what gets done"}, {force, $f, "force", undefined, "Force"}, {jobs, $j, "jobs", integer, JobsHelp} ]. %% %% Seperate all commands (single-words) from flags (key=value) and store %% values into the rebar_config global storage. %% filter_flags([], Commands) -> lists:reverse(Commands); filter_flags([Item | Rest], Commands) -> case string:tokens(Item, "=") of [Command] -> filter_flags(Rest, [Command | Commands]); [KeyStr, Value] -> Key = list_to_atom(KeyStr), rebar_config:set_global(Key, Value), filter_flags(Rest, Commands); Other -> ?CONSOLE("Ignoring command line argument: ~p\n", [Other]), filter_flags(Rest, Commands) end. process_dir(Dir, ParentConfig, Commands) -> ok = file:set_cwd(Dir), Config = rebar_config:new(ParentConfig), %% Save the current code path and then update it with %% lib_dirs. Children inherit parents code path, but we %% also want to ensure that we restore everything to pristine %% condition after processing this child CurrentCodePath = update_code_path(Config), %% Get the list of processing modules and check each one against %% CWD to see if it's a fit -- if it is, use that set of modules %% to process this dir. {ok, AvailModuleSets} = application:get_env(rebar, modules), {DirModules, ModuleSetFile} = choose_module_set(AvailModuleSets, Dir), %% Get the list of modules for "any dir". This is a catch-all list of modules %% that are processed in addion to modules associated with this directory %% type. These any_dir modules are processed FIRST. {ok, AnyDirModules} = application:get_env(rebar, any_dir_modules), Modules = AnyDirModules ++ DirModules, %% Give the modules a chance to tweak config and indicate if there %% are any other dirs that might need processing first. {UpdatedConfig, Dirs} = acc_modules(select_modules(Modules, preprocess, []), preprocess, Config, ModuleSetFile, []), ?DEBUG("~s subdirs: ~p\n", [Dir, Dirs]), [process_dir(D, UpdatedConfig, Commands) || D <- Dirs], %% Make sure the CWD is reset properly; processing subdirs may have caused it %% to change ok = file:set_cwd(Dir), %% Finally, process the current working directory apply_commands(Commands, Modules, UpdatedConfig, ModuleSetFile), %% Once we're all done processing, reset the code path to whatever %% the parent initialized it to restore_code_path(CurrentCodePath), ok. %% %% Given a list of module sets from rebar.app and a directory, find %% the appropriate subset of modules for this directory %% choose_module_set([], _Dir) -> {[], undefined}; choose_module_set([{Fn, Modules} | Rest], Dir) -> case ?MODULE:Fn(Dir) of {true, File} -> {Modules, File}; false -> choose_module_set(Rest, Dir) end. %% %% Return .app file if the current directory is an OTP app %% app_dir(Dir) -> rebar_app_utils:is_app_dir(Dir). %% %% Return the reltool.config file if the current directory is release directory %% rel_dir(Dir) -> rebar_rel_utils:is_rel_dir(Dir). apply_commands([], _Modules, _Config, _ModuleFile) -> ok; apply_commands([Command | Rest], Modules, Config, ModuleFile) -> case select_modules(Modules, Command, []) of [] -> apply_commands(Rest, Modules, Config, ModuleFile); TargetModules -> %% Provide some info on where we are Dir = rebar_utils:get_cwd(), ?CONSOLE("==> ~s (~s)\n", [filename:basename(Dir), Command]), %% Run the available modules case catch(run_modules(TargetModules, Command, Config, ModuleFile)) of ok -> apply_commands(Rest, Modules, Config, ModuleFile); {error, failed} -> ?FAIL; Other -> ?ABORT("~p failed while processing ~s: ~s", [Command, Dir, io_lib:print(Other, 1,80,-1)]) end end. update_code_path(Config) -> case rebar_config:get(Config, lib_dirs, []) of [] -> no_change; Paths -> OldPath = code:get_path(), LibPaths = expand_lib_dirs(Paths, rebar_utils:get_cwd(), []), ok = code:add_pathsa(LibPaths), {old, OldPath} end. restore_code_path(no_change) -> ok; restore_code_path({old, Path}) -> %% Verify that all of the paths still exist -- some dynamically add paths %% can get blown away during clean. true = code:set_path(lists:filter(fun filelib:is_file/1, Path)), ok. expand_lib_dirs([], _Root, Acc) -> Acc; expand_lib_dirs([Dir | Rest], Root, Acc) -> Apps = filelib:wildcard(filename:join([Dir, '*', ebin])), FqApps = [filename:join([Root, A]) || A <- Apps], expand_lib_dirs(Rest, Root, Acc ++ FqApps). select_modules([], _Command, Acc) -> lists:reverse(Acc); select_modules([Module | Rest], Command, Acc) -> Exports = Module:module_info(exports), case lists:member({Command, 2}, Exports) of true -> select_modules(Rest, Command, [Module | Acc]); false -> select_modules(Rest, Command, Acc) end. run_modules([], _Command, _Config, _File) -> ok; run_modules([Module | Rest], Command, Config, File) -> case Module:Command(Config, File) of ok -> run_modules(Rest, Command, Config, File); {error, Reason} -> {error, Reason} end. acc_modules([], _Command, Config, _File, Acc) -> {Config, Acc}; acc_modules([Module | Rest], Command, Config, File, Acc) -> case Module:Command(Config, File) of {ok, NewConfig, Result} when is_list(Result) -> List = Result; {ok, NewConfig, Result} -> List = [Result] end, acc_modules(Rest, Command, NewConfig, File, List ++ Acc).