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|
%% -------------------------------------------------------------------
%%
%% 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(Args) ->
%% Filter all the flags (i.e. string of form key=value) from the
%% command line arguments. What's left will be the commands to run.
Commands = filter_flags(Args, []),
%% Pre-load the rebar app so that we get default configuration
ok = application:load(rebar),
%% 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],
%% Load rebar.config, if it exists
process_dir(rebar_utils:get_cwd(), rebar_config:new(), CommandAtoms).
%% ===================================================================
%% Internal functions
%% ===================================================================
%%
%% 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),
%% If there are any subdirs specified, process those first...
case rebar_config:get(Config, sub_dirs, []) of
[] ->
ok;
Subdirs ->
%% Edge case: config is inherited, EXCEPT for sub_dir directives -- filter those out
FilteredConfig = rebar_config:delete(Config, sub_dirs),
[process_dir(filename:join(Dir, Subdir), FilteredConfig, Commands) ||
Subdir <- Subdirs],
ok = file:set_cwd(Dir)
end,
%% 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),
case choose_module_set(AvailModuleSets, Dir) of
{ok, Modules, ModuleSetFile} ->
apply_commands(Commands, Modules, Config, ModuleSetFile);
none ->
ok
end,
%% Once we're all done processing, reset the code path to whatever
%% the parent initialized it to
restore_code_path(CurrentCodePath),
ok.
%%
%% Give a list of module sets from rebar.app and a directory, find
%% the appropriate subset of modules for this directory
%%
choose_module_set([], _Dir) ->
none;
choose_module_set([{Fn, Modules} | Rest], Dir) ->
case ?MODULE:Fn(Dir) of
{true, File} ->
{ok, 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 ->
?ERROR("~p failed while processing ~s: ~p", [Command, Dir, Other]),
?FAIL
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}) ->
true = code:set_path(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.
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