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|
%% -*- 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_protobuffs_compiler).
-export([compile/2,
clean/2]).
-include("rebar.hrl").
%% ===================================================================
%% Public API
%% ===================================================================
compile(_Config, _AppFile) ->
case filelib:wildcard("src/*.proto") of
[] ->
ok;
FoundFiles ->
%% Check for protobuffs library -- if it's not present, fail since we have
%% .proto files that need building
case protobuffs_is_present() of
true ->
%% Build a list of output files - { Proto, Beam, Hrl }
Targets = [{Proto, beam_file(Proto), hrl_file(Proto)} ||
Proto <- FoundFiles],
%% Compile each proto file
compile_each(Targets);
false ->
?ERROR("Protobuffs library not present in code path!\n", []),
?FAIL
end
end.
clean(_Config, _AppFile) ->
%% Get a list of generated .beam and .hrl files and then delete them
Protos = filelib:wildcard("src/*.proto"),
Targets = [fq_beam_file(F) || F <- Protos] ++ [fq_hrl_file(F) || F <- Protos],
case Targets of
[] ->
ok;
_ ->
delete_each(Targets)
end.
%% ===================================================================
%% Internal functions
%% ===================================================================
protobuffs_is_present() ->
case code:which(protobuffs_compile) of
non_existing ->
false;
_ ->
true
end.
beam_file(Proto) ->
filename:basename(Proto, ".proto") ++ "_pb.beam".
hrl_file(Proto) ->
filename:basename(Proto, ".proto") ++ "_pb.hrl".
fq_beam_file(Proto) ->
filename:join(["ebin", filename:basename(Proto, ".proto") ++ "_pb.beam"]).
fq_hrl_file(Proto) ->
filename:join(["include", filename:basename(Proto, ".proto") ++ "_pb.hrl"]).
needs_compile(Proto, Beam) ->
ActualBeam = filename:join(["ebin", filename:basename(Beam)]),
filelib:last_modified(ActualBeam) < filelib:last_modified(Proto).
compile_each([]) ->
ok;
compile_each([{Proto, Beam, Hrl} | Rest]) ->
case needs_compile(Proto, Beam) of
true ->
?CONSOLE("Compiling ~s\n", [Proto]),
case protobuffs_compile:scan_file(Proto) of
ok ->
%% Compilation worked, but we need to move the .beam and .hrl file
%% into the ebin/ and include/ directories respectively
%% TODO: Protobuffs really needs to be better about this...sigh.
[] = os:cmd(?FMT("mv ~s ebin", [Beam])),
ok = filelib:ensure_dir(filename:join("include", Hrl)),
[] = os:cmd(?FMT("mv ~s include", [Hrl])),
ok;
Other ->
?ERROR("Protobuff compile of ~s failed: ~p\n", [Proto, Other]),
?FAIL
end;
false ->
ok
end,
compile_each(Rest).
delete_each([]) ->
ok;
delete_each([File | Rest]) ->
case file:delete(File) of
ok ->
ok;
{error, enoent} ->
ok;
{error, Reason} ->
?ERROR("Failed to delete ~s: ~p\n", [File, Reason])
end,
delete_each(Rest).
|
