mirror of
https://github.com/processone/ejabberd.git
synced 2024-11-20 16:15:59 +01:00
127 lines
3.9 KiB
Erlang
127 lines
3.9 KiB
Erlang
-module(override_deps_versions2).
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-export([preprocess/2, 'pre_update-deps'/2, new_replace/1, new_replace/0]).
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preprocess(Config, _Dirs) ->
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update_deps(Config).
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update_deps(Config) ->
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LocalDeps = rebar_config:get_local(Config, deps, []),
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TopDeps = case rebar_config:get_xconf(Config, top_deps, []) of
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[] -> LocalDeps;
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Val -> Val
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end,
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Config2 = rebar_config:set_xconf(Config, top_deps, TopDeps),
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NewDeps = lists:map(fun({Name, _, _} = Dep) ->
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case lists:keyfind(Name, 1, TopDeps) of
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false -> Dep;
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TopDep -> TopDep
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end
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end, LocalDeps),
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%io:format("LD ~p~n", [LocalDeps]),
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%io:format("TD ~p~n", [TopDeps]),
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Config3 = rebar_config:set(Config2, deps, NewDeps),
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{ok, Config3, []}.
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'pre_update-deps'(Config, _Dirs) ->
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{ok, Config2, _} = update_deps(Config),
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case code:is_loaded(old_rebar_config) of
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false ->
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{_, Beam, _} = code:get_object_code(rebar_config),
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NBeam = rename(Beam, old_rebar_config),
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code:load_binary(old_rebar_config, "blank", NBeam),
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replace_mod(Beam);
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_ ->
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ok
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end,
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{ok, Config2}.
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new_replace() ->
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old_rebar_config:new().
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new_replace(Config) ->
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NC = old_rebar_config:new(Config),
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{ok, Conf, _} = update_deps(NC),
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Conf.
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replace_mod(Beam) ->
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{ok, {_, [{exports, Exports}]}} = beam_lib:chunks(Beam, [exports]),
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Funcs = lists:filtermap(
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fun({module_info, _}) ->
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false;
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({Name, Arity}) ->
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Args = args(Arity),
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Call = case Name of
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new ->
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[erl_syntax:application(
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erl_syntax:abstract(override_deps_versions2),
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erl_syntax:abstract(new_replace),
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Args)];
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_ ->
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[erl_syntax:application(
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erl_syntax:abstract(old_rebar_config),
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erl_syntax:abstract(Name),
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Args)]
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end,
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{true, erl_syntax:function(erl_syntax:abstract(Name),
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[erl_syntax:clause(Args, none,
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Call)])}
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end, Exports),
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Forms0 = ([erl_syntax:attribute(erl_syntax:abstract(module),
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[erl_syntax:abstract(rebar_config)])]
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++ Funcs),
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Forms = [erl_syntax:revert(Form) || Form <- Forms0],
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%io:format("--------------------------------------------------~n"
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% "~s~n",
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% [[erl_pp:form(Form) || Form <- Forms]]),
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{ok, Mod, Bin} = compile:forms(Forms, [report, export_all]),
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code:purge(rebar_config),
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{module, Mod} = code:load_binary(rebar_config, "mock", Bin).
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args(0) ->
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[];
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args(N) ->
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[arg(N) | args(N-1)].
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arg(N) ->
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erl_syntax:variable(list_to_atom("A"++integer_to_list(N))).
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rename(BeamBin0, Name) ->
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BeamBin = replace_in_atab(BeamBin0, Name),
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update_form_size(BeamBin).
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%% Replace the first atom of the atom table with the new name
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replace_in_atab(<<"Atom", CnkSz0:32, Cnk:CnkSz0/binary, Rest/binary>>, Name) ->
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replace_first_atom(<<"Atom">>, Cnk, CnkSz0, Rest, latin1, Name);
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replace_in_atab(<<"AtU8", CnkSz0:32, Cnk:CnkSz0/binary, Rest/binary>>, Name) ->
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replace_first_atom(<<"AtU8">>, Cnk, CnkSz0, Rest, unicode, Name);
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replace_in_atab(<<C, Rest/binary>>, Name) ->
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<<C, (replace_in_atab(Rest, Name))/binary>>.
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replace_first_atom(CnkName, Cnk, CnkSz0, Rest, Encoding, Name) ->
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<<NumAtoms:32, NameSz0:8, _Name0:NameSz0/binary, CnkRest/binary>> = Cnk,
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NumPad0 = num_pad_bytes(CnkSz0),
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<<_:NumPad0/unit:8, NextCnks/binary>> = Rest,
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NameBin = atom_to_binary(Name, Encoding),
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NameSz = byte_size(NameBin),
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CnkSz = CnkSz0 + NameSz - NameSz0,
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NumPad = num_pad_bytes(CnkSz),
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<<CnkName/binary, CnkSz:32, NumAtoms:32, NameSz:8, NameBin:NameSz/binary,
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CnkRest/binary, 0:NumPad/unit:8, NextCnks/binary>>.
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%% Calculate the number of padding bytes that have to be added for the
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%% BinSize to be an even multiple of ?beam_num_bytes_alignment.
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num_pad_bytes(BinSize) ->
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case 4 - (BinSize rem 4) of
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4 -> 0;
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N -> N
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end.
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%% Update the size within the top-level form
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update_form_size(<<"FOR1", _OldSz:32, Rest/binary>> = Bin) ->
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Sz = size(Bin) - 8,
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<<"FOR1", Sz:32, Rest/binary>>.
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