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Added a compiler plugin for neotoma grammars
This commit is contained in:
Cliff Moon
parent
deaabbe9a7
commit
55c1e44ba5
2 changed files with 141 additions and 0 deletions
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@ -22,6 +22,7 @@
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rebar_otp_app,
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rebar_port_compiler,
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rebar_protobuffs_compiler,
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rebar_neotoma_compiler,
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rebar_port_compiler,
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rebar_post_script,
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rebar_rel_utils,
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@ -57,6 +58,7 @@
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{modules, [
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{app_dir, [
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rebar_protobuffs_compiler,
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rebar_neotoma_compiler,
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rebar_asn1_compiler,
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rebar_erlc_compiler,
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rebar_lfe_compiler,
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139
src/rebar_neotoma_compiler.erl
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139
src/rebar_neotoma_compiler.erl
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@ -0,0 +1,139 @@
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%% -*- tab-width: 4;erlang-indent-level: 4;indent-tabs-mode: nil -*-
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%% ex: ts=4 sw=4 et
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%% -------------------------------------------------------------------
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%%
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%% rebar: Erlang Build Tools
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%%
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%% Copyright (c) 2010 Cliff Moon (cliff@moonpolysoft.com)
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%%
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%% Permission is hereby granted, free of charge, to any person obtaining a copy
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%% of this software and associated documentation files (the "Software"), to deal
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%% in the Software without restriction, including without limitation the rights
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%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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%% copies of the Software, and to permit persons to whom the Software is
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%% furnished to do so, subject to the following conditions:
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%%
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%% The above copyright notice and this permission notice shall be included in
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%% all copies or substantial portions of the Software.
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%%
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%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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%% THE SOFTWARE.
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%% -------------------------------------------------------------------
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%% The rebar_neotoma module is a plugin for rebar that compiles
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%% neotoma peg files. By default, it compiles all src/*.peg to src/*.erl
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%%
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%% Configuration options should be placed in rebar.config under
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%% neotoma_opts. Available options include:
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%%
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%% doc_root: where to find the peg files to compile.
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%% "src" by default
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%% out_dir: where to put the generated erl files.
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%% "src" by defualt
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%% module_ext: characters to append to the module's name.
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%% "" by default
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-module(rebar_neotoma_compiler).
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-export([compile/2]).
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-include("rebar.hrl").
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%% ============================================================================
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%% Public API
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%% ============================================================================
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compile(Config, _AppFile) ->
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NeoOpts = neotoma_opts(Config),
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rebar_base_compiler:run(Config, [],
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option(doc_root, NeoOpts), ".peg",
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option(out_dir, NeoOpts), option(module_ext, NeoOpts) ++ ".beam",
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fun compile_neo/3, [{check_last_mod,false}]).
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%% ============================================================================
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%% Public API
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%% ============================================================================
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neotoma_opts(Config) ->
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rebar_config:get(Config, neotoma_opts, []).
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option(Opt, Options) ->
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proplists:get_value(Opt, Options, default(Opt)).
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default(doc_root) -> "src";
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default(out_dir) -> "src";
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default(module_ext) -> "".
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compile_neo(Source, Target, Config) ->
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case code:which(neotoma) of
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non_existing ->
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?CONSOLE(
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"~n===============================================~n"
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" You need to install neotoma to compile PEG grammars~n"
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" Download the latest tarball release from github~n"
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" http://github.com/seancribbs/neotoma~n"
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" and install it into your erlang library dir~n"
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"===============================================~n~n", []),
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?FAIL;
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_ ->
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case needs_compile(Source, Target, Config) of
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true ->
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do_compile(Source, Target, Config);
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false ->
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skipped
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end
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end.
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do_compile(Source, _Target, Config) ->
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%% TODO: Check last mod on target and referenced DTLs here..
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NeoOpts = neotoma_opts(Config),
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%% ensure that doc_root and out_dir are defined,
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%% using defaults if necessary
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Opts = [{output, option(out_dir, NeoOpts)},
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{module, list_to_atom(filename:basename(Source, ".peg") ++ option(module_ext, NeoOpts))}],
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case neotoma:file(Source, Opts ++ NeoOpts) of
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ok ->
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ok;
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Reason ->
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?CONSOLE("Compiling peg ~s failed:~n ~p~n",
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[Source, Reason]),
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?FAIL
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end.
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needs_compile(Source, Target, Config) ->
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LM = filelib:last_modified(Target),
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case LM < filelib:last_modified(Source) of
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true -> true;
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false ->
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lists:any(fun(D) -> LM < filelib:last_modified(D) end,
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referenced_pegs(Source, Config))
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end.
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referenced_pegs(Source, Config) ->
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Set = referenced_pegs1([Source], Config,
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sets:add_element(Source, sets:new())),
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Final = sets:to_list(sets:del_element(Source, Set)),
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Final.
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referenced_pegs1(Step, Config, Seen) ->
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NeoOpts = neotoma_opts(Config),
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ExtMatch = re:replace(option(source_ext, NeoOpts), "\.", "\\\\\\\\.",
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[{return, list}]),
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AllRefs = lists:append(
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[ string:tokens(
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os:cmd(["grep -o [^\\\"]*",ExtMatch," ",F]),
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"\n")
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|| F <- Step]),
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DocRoot = option(doc_root, NeoOpts),
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WithPaths = [ filename:join([DocRoot, F]) || F <- AllRefs ],
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Existing = lists:filter(fun filelib:is_file/1, WithPaths),
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New = sets:subtract(sets:from_list(Existing), Seen),
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case sets:size(New) of
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0 -> Seen;
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_ -> referenced_pegs1(sets:to_list(New), Config,
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sets:union(New, Seen))
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end.
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