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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
%% -------------------------------------------------------------------
%%
%% rebar: Erlang Build Tools
%%
%% Copyright (c) 2010 Anthony Ramine (nox@dev-extend.eu),
%%
%% 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.
%% -------------------------------------------------------------------
%% The rebar_abnfc_compiler module is a plugin for rebar that compiles
%% ABNF grammars into parsers. By default, it compiles all src/*.abnf
%% to src/*.erl.
%%
%% Configuration options should be placed in rebar.config under
%% 'abnfc_opts'. Available options include:
%%
%% doc_root: where to find the ABNF grammars to compile
%% "src" by default
%%
%% out_dir: where to put the generated files.
%% "src" by default
%%
%% source_ext: the file extension the ABNF grammars have.
%% ".abnf" by default
%%
%% module_ext: characters to append to the parser's module name
%% "" by default
-module(rebar_abnfc_compiler).
-export([compile/2]).
-include("rebar.hrl").
%% ===================================================================
%% Public API
%% ===================================================================
compile(Config, _AppFile) ->
DtlOpts = abnfc_opts(Config),
rebar_base_compiler:run(Config, [],
option(doc_root, DtlOpts),
option(source_ext, DtlOpts),
option(out_dir, DtlOpts),
option(module_ext, DtlOpts) ++ ".erl",
fun compile_abnfc/3).
%% ===================================================================
%% Internal functions
%% ===================================================================
abnfc_opts(Config) ->
rebar_config:get(Config, abnfc_opts, []).
option(Opt, DtlOpts) ->
proplists:get_value(Opt, DtlOpts, default(Opt)).
default(doc_root) -> "src";
default(out_dir) -> "src";
default(source_ext) -> ".abnf";
default(module_ext) -> "".
abnfc_is_present() ->
code:which(abnfc) =/= non_existing.
compile_abnfc(Source, _Target, Config) ->
case abnfc_is_present() of
false ->
?ERROR("~n===============================================~n"
" You need to install abnfc to compile ABNF grammars~n"
" Download the latest tarball release from github~n"
" https://github.com/nygge/abnfc~n"
" and install it into your erlang library dir~n"
"===============================================~n~n", []),
?FAIL;
true ->
AbnfcOpts = abnfc_opts(Config),
SourceExt = option(source_ext, AbnfcOpts),
Opts = [noobj,
{o, option(out_dir, AbnfcOpts)},
{mod, filename:basename(Source, SourceExt) ++
option(module_ext, AbnfcOpts)}],
case abnfc:file(Source, Opts) of
ok -> ok;
Error ->
?ERROR("Compiling grammar ~s failed:~n ~p~n",
[Source, Error]),
?FAIL
end
end.
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