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xmpp.chapril.org-ejabberd/plugins/override_deps_versions2.erl

126 lines
3.9 KiB

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