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%% -*- 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_otp_app).
-export([compile/2,
format_error/1]).
-include("rebar.hrl").
-include_lib("providers/include/providers.hrl").
%% ===================================================================
%% Public API
%% ===================================================================
compile(State, App) ->
%% If we get an .app.src file, it needs to be pre-processed and
%% written out as a ebin/*.app file. That resulting file will then
%% be validated as usual.
App1 = case rebar_app_info:app_file_src(App) of
undefined ->
App;
AppFileSrc ->
File = preprocess(State, App, AppFileSrc),
rebar_app_info:app_file(App, File)
end,
%% Load the app file and validate it.
validate_app(State, App1).
format_error(invalid_app_file) ->
"Failed to read app file";
format_error({file_read, File, Reason}) ->
io_lib:format("Failed to read ~s for processing: ~p", [File, Reason]);
format_error({invalid_name, File, AppName}) ->
io_lib:format("Invalid ~s: name of application (~p) must match filename.", [File, AppName]).
%% ===================================================================
%% Internal functions
%% ===================================================================
validate_app(State, App) ->
AppFile = rebar_app_info:app_file(App),
case consult_app_file(AppFile) of
{ok, [{application, AppName, AppData}]} ->
case validate_name(AppName, AppFile) of
ok ->
validate_app_modules(State, App, AppData);
Error ->
Error
end;
{error, Reason} ->
?PRV_ERROR({file_read, AppFile, Reason})
end.
validate_app_modules(State, App, AppData) ->
%% In general, the list of modules is an important thing to validate
%% for compliance with OTP guidelines and upgrade procedures.
%% However, some people prefer not to validate this list.
AppVsn = proplists:get_value(vsn, AppData),
case rebar_state:get(State, validate_app_modules, true) of
true ->
case rebar_app_utils:validate_application_info(App, AppData) of
true ->
{ok, rebar_app_info:original_vsn(App, AppVsn)};
Error ->
Error
end;
false ->
{ok, rebar_app_info:original_vsn(App, AppVsn)}
end.
preprocess(State, AppInfo, AppSrcFile) ->
case consult_app_file(AppSrcFile) of
{ok, [{application, AppName, AppData}]} ->
%% Look for a configuration file with vars we want to
%% substitute. Note that we include the list of modules available in
%% ebin/ and update the app data accordingly.
OutDir = rebar_app_info:out_dir(AppInfo),
AppVars = load_app_vars(State) ++ [{modules, ebin_modules(AppInfo, OutDir)}],
A1 = apply_app_vars(AppVars, AppData),
%% AppSrcFile may contain instructions for generating a vsn number
Vsn = app_vsn(AppSrcFile),
A2 = lists:keystore(vsn, 1, A1, {vsn, Vsn}),
%% systools:make_relup/4 fails with {missing_param, registered}
%% without a 'registered' value.
A3 = ensure_registered(A2),
%% Build the final spec as a string
Spec = io_lib:format("~p.\n", [{application, AppName, A3}]),
%% Setup file .app filename and write new contents
EbinDir = rebar_app_info:ebin_dir(AppInfo),
filelib:ensure_dir(filename:join(EbinDir, "dummy.beam")),
AppFile = rebar_app_utils:app_src_to_app(OutDir, AppSrcFile),
ok = rebar_file_utils:write_file_if_contents_differ(AppFile, Spec),
%% Make certain that the ebin/ directory is available
%% on the code path
true = code:add_path(filename:absname(filename:dirname(AppFile))),
AppFile;
{error, Reason} ->
?PRV_ERROR({file_read, AppSrcFile, Reason})
end.
load_app_vars(State) ->
case rebar_state:get(State, app_vars_file, undefined) of
undefined ->
?DEBUG("No app_vars_file defined.", []),
[];
Filename ->
?INFO("Loading app vars from ~p", [Filename]),
{ok, Vars} = file:consult(Filename),
Vars
end.
apply_app_vars([], AppData) ->
AppData;
apply_app_vars([{Key, Value} | Rest], AppData) ->
AppData2 = lists:keystore(Key, 1, AppData, {Key, Value}),
apply_app_vars(Rest, AppData2).
validate_name(AppName, File) ->
%% Convert the .app file name to an atom -- check it against the
%% identifier within the file
ExpApp = list_to_atom(filename:basename(File, ".app")),
case ExpApp == AppName of
true ->
ok;
false ->
?PRV_ERROR({invalid_name, File, AppName})
end.
ebin_modules(App, Dir) ->
Beams = lists:sort(rebar_utils:beams(filename:join(Dir, "ebin"))),
F = fun(Beam) -> not lists:prefix(filename:join([rebar_app_info:dir(App), "test"]),
beam_src(Beam))
end,
Filtered = lists:filter(F, Beams),
[rebar_utils:beam_to_mod(N) || N <- Filtered].
beam_src(Beam) ->
try
{module, Mod} = code:load_abs(filename:rootname(Beam, ".beam")),
Compile = Mod:module_info(compile),
%% completely purge module so any other attempts to load it succeed
_ = code:purge(Mod),
_ = code:delete(Mod),
_ = code:purge(Mod),
proplists:get_value(source, Compile, [])
catch
error:undef -> [];
error:nofile -> []
end.
ensure_registered(AppData) ->
case lists:keyfind(registered, 1, AppData) of
false ->
[{registered, []} | AppData];
{registered, _} ->
%% We could further check whether the value is a list of atoms.
AppData
end.
%% In the case of *.app.src we want to give the user the ability to
%% dynamically script the application resource file (think dynamic version
%% string, etc.), in a way similar to what can be done with the rebar
%% config. However, in the case of *.app, rebar should not manipulate
%% that file. This enforces that dichotomy between app and app.src.
consult_app_file(Filename) ->
case filelib:is_file(Filename) of
false ->
throw(?PRV_ERROR(invalid_app_file));
true ->
case lists:suffix(".app.src", Filename) of
false ->
file:consult(Filename);
true ->
{ok, rebar_config:consult_file(Filename)}
end
end.
app_vsn(AppFile) ->
case consult_app_file(AppFile) of
{ok, [{application, _AppName, AppData}]} ->
AppDir = filename:dirname(filename:dirname(AppFile)),
rebar_utils:vcs_vsn(get_value(vsn, AppData, AppFile), AppDir);
{error, Reason} ->
?ABORT("Failed to consult app file ~s: ~p\n", [AppFile, Reason])
end.
get_value(Key, AppInfo, AppFile) ->
case proplists:get_value(Key, AppInfo) of
undefined ->
?ABORT("Failed to get app value '~p' from '~s'~n", [Key, AppFile]);
Value ->
Value
end.
|
