72 lines
2.3 KiB
Erlang
72 lines
2.3 KiB
Erlang
%%--------------------------------------------------------------------
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%% Copyright (c) 2020-2021 EMQ Technologies Co., Ltd. All Rights Reserved.
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%%
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%% Licensed under the Apache License, Version 2.0 (the "License");
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%% you may not use this file except in compliance with the License.
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%% You may obtain a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing, software
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%% distributed under the License is distributed on an "AS IS" BASIS,
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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%% See the License for the specific language governing permissions and
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%% limitations under the License.
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%%--------------------------------------------------------------------
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-module(emqx_resource_transform).
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-include_lib("syntax_tools/include/merl.hrl").
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-export([parse_transform/2]).
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parse_transform(Forms, _Opts) ->
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Mod = hd([M || {attribute, _, module, M} <- Forms]),
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AST = trans(Mod, proplists:delete(eof, Forms)),
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_ = debug_print(Mod, AST),
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AST.
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-ifdef(RESOURCE_DEBUG).
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debug_print(Mod, Ts) ->
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{ok, Io} = file:open("./" ++ atom_to_list(Mod) ++ ".trans.erl", [write]),
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_ = do_debug_print(Io, Ts),
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file:close(Io).
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do_debug_print(Io, Ts) when is_list(Ts) ->
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lists:foreach(fun(T) -> do_debug_print(Io, T) end, Ts);
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do_debug_print(Io, T) ->
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io:put_chars(Io, erl_prettypr:format(merl:tree(T))),
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io:nl(Io).
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-else.
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debug_print(_Mod, _AST) ->
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ok.
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-endif.
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trans(Mod, Forms) ->
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forms(Mod, Forms) ++ [erl_syntax:revert(erl_syntax:eof_marker())].
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forms(Mod, [F0 | Fs0]) ->
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case form(Mod, F0) of
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{CurrForms, AppendedForms} ->
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CurrForms ++ forms(Mod, Fs0) ++ AppendedForms;
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{CurrForms, FollowerForms, AppendedForms} ->
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CurrForms ++ FollowerForms ++ forms(Mod, Fs0) ++ AppendedForms
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end;
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forms(_, []) -> [].
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form(Mod, Form) ->
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case Form of
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?Q("-module('@_').") ->
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{[Form], fix_spec_attrs(), fix_spec_funcs(Mod)};
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_ ->
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%io:format("---other form: ~p~n", [Form]),
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{[Form], [], []}
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end.
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fix_spec_attrs() ->
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[ ?Q("-export([emqx_resource_schema/0]).")
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].
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fix_spec_funcs(_Mod) ->
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[ ?Q("emqx_resource_schema() -> <<\"demo_swagger_schema\">>.")
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].
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