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-module(rebar_opts).
-export([get/2,
get/3,
set/3,
erl_opts/1,
apply_overrides/3,
add_to_profile/3,
merge_opts/2,
merge_opts/3]).
-include("rebar.hrl").
get(Opts, Key) ->
{ok, Value} = dict:find(Key, Opts),
Value.
get(Opts, Key, Default) ->
case dict:find(Key, Opts) of
{ok, Value} ->
Value;
error ->
Default
end.
set(Opts, Key, Value) ->
dict:store(Key, Value, Opts).
%% @doc Return list of erl_opts
-spec erl_opts(rebar_dict()) -> list().
erl_opts(Opts) ->
RawErlOpts = filter_defines(?MODULE:get(Opts, erl_opts, []), []),
Defines = [{d, list_to_atom(D)} ||
D <- ?MODULE:get(Opts, defines, [])],
AllOpts = Defines ++ RawErlOpts,
case proplists:is_defined(no_debug_info, AllOpts) of
true ->
[O || O <- AllOpts, O =/= no_debug_info];
false ->
[debug_info|AllOpts]
end.
apply_overrides(Opts, Name, Overrides) ->
%% Inefficient. We want the order we get here though.
Opts1 = lists:foldl(fun({override, O}, OptsAcc) ->
lists:foldl(fun({deps, Value}, OptsAcc1) ->
set(OptsAcc1, {deps,default}, Value);
({Key, Value}, OptsAcc1) ->
set(OptsAcc1, Key, Value)
end, OptsAcc, O);
(_, OptsAcc) ->
OptsAcc
end, Opts, Overrides),
Opts2 = lists:foldl(fun({override, N, O}, OptsAcc) when N =:= Name ->
lists:foldl(fun({deps, Value}, OptsAcc1) ->
set(OptsAcc1, {deps,default}, Value);
({Key, Value}, OptsAcc1) ->
set(OptsAcc1, Key, Value)
end, OptsAcc, O);
(_, OptsAcc) ->
OptsAcc
end, Opts1, Overrides),
lists:foldl(fun({add, N, O}, OptsAcc) when N =:= Name ->
lists:foldl(fun({deps, Value}, OptsAcc1) ->
OldValue = ?MODULE:get(OptsAcc1, {deps,default}, []),
set(OptsAcc1, {deps,default}, Value++OldValue);
({Key, Value}, OptsAcc1) ->
OldValue = ?MODULE:get(OptsAcc1, Key, []),
set(OptsAcc1, Key, Value++OldValue)
end, OptsAcc, O);
(_, OptsAcc) ->
OptsAcc
end, Opts2, Overrides).
add_to_profile(Opts, Profile, KVs) when is_atom(Profile), is_list(KVs) ->
Profiles = ?MODULE:get(Opts, profiles, []),
ProfileOpts = dict:from_list(proplists:get_value(Profile, Profiles, [])),
NewOpts = merge_opts(Profile, dict:from_list(KVs), ProfileOpts),
NewProfiles = [{Profile, dict:to_list(NewOpts)}|lists:keydelete(Profile, 1, Profiles)],
set(Opts, profiles, NewProfiles).
merge_opts(Profile, NewOpts, OldOpts) ->
Opts = merge_opts(NewOpts, OldOpts),
Opts2 = case dict:find(plugins, NewOpts) of
{ok, Value} ->
dict:store({plugins, Profile}, Value, Opts);
error ->
Opts
end,
case dict:find(deps, NewOpts) of
{ok, Value2} ->
dict:store({deps, Profile}, Value2, Opts2);
error ->
Opts2
end.
merge_opts(NewOpts, OldOpts) ->
dict:merge(fun merge_opt/3, NewOpts, OldOpts).
%% Internal functions
%%
%% Function for dict:merge/3 (in merge_opts/2) to merge options by priority.
%%
merge_opt(deps, _NewValue, OldValue) ->
OldValue;
merge_opt({deps, _}, NewValue, _OldValue) ->
NewValue;
merge_opt(plugins, NewValue, _OldValue) ->
NewValue;
merge_opt({plugins, _}, NewValue, _OldValue) ->
NewValue;
merge_opt(profiles, NewValue, OldValue) ->
%% Merge up sparse pairs of {Profile, Opts} into a joined up
%% {Profile, OptsNew, OptsOld} list.
ToMerge = normalise_profile_pairs(lists:sort(NewValue),
lists:sort(OldValue)),
[{K,dict:to_list(merge_opts(dict:from_list(New), dict:from_list(Old)))}
|| {K,New,Old} <- ToMerge];
merge_opt(erl_first_files, Value, Value) ->
Value;
merge_opt(erl_first_files, NewValue, OldValue) ->
OldValue ++ NewValue;
merge_opt(mib_first_files, Value, Value) ->
Value;
merge_opt(mib_first_files, NewValue, OldValue) ->
OldValue ++ NewValue;
merge_opt(relx, NewValue, OldValue) ->
rebar_utils:tup_umerge(OldValue, NewValue);
merge_opt(Key, NewValue, OldValue)
when Key == erl_opts; Key == eunit_compile_opts; Key == ct_compile_opts ->
merge_erl_opts(lists:reverse(OldValue), NewValue);
merge_opt(_Key, NewValue, OldValue) when is_list(NewValue) ->
case io_lib:printable_list(NewValue) of
true when NewValue =:= [] ->
case io_lib:printable_list(OldValue) of
true ->
NewValue;
false ->
OldValue
end;
true ->
NewValue;
false ->
rebar_utils:tup_umerge(NewValue, OldValue)
end;
merge_opt(_Key, NewValue, _OldValue) ->
NewValue.
%%
%% Merge Erlang compiler options such that the result
%% a) Doesn't contain duplicates.
%% b) Resulting options are ordered by increasing precedence as expected by
%% the compiler.
%% The first parameter is the lower precedence options, in reverse order, to
%% be merged with the higher-precedence options in the second parameter.
%%
merge_erl_opts([Opt | Opts], []) ->
merge_erl_opts(Opts, [Opt]);
merge_erl_opts([Opt | Opts], Merged) ->
case lists:member(Opt, Merged) of
true ->
merge_erl_opts(Opts, Merged);
_ ->
merge_erl_opts(Opts, [Opt | Merged])
end;
merge_erl_opts([], Merged) ->
Merged.
%%
%% Filter a list of erl_opts platform_define options such that only
%% those which match the provided architecture regex are returned.
%%
filter_defines([], Acc) ->
lists:reverse(Acc);
filter_defines([{platform_define, ArchRegex, Key} | Rest], Acc) ->
case rebar_utils:is_arch(ArchRegex) of
true ->
filter_defines(Rest, [{d, Key} | Acc]);
false ->
filter_defines(Rest, Acc)
end;
filter_defines([{platform_define, ArchRegex, Key, Value} | Rest], Acc) ->
case rebar_utils:is_arch(ArchRegex) of
true ->
filter_defines(Rest, [{d, Key, Value} | Acc]);
false ->
filter_defines(Rest, Acc)
end;
filter_defines([Opt | Rest], Acc) ->
filter_defines(Rest, [Opt | Acc]).
%% @private takes two lists of profile tuples and merges them
%% into one list of 3-tuples containing the values of either
%% profiles.
%% Any missing profile in one of the keys is replaced by an
%% empty one.
-spec normalise_profile_pairs([Profile], [Profile]) -> [Pair] when
Profile :: {Name, Opts},
Pair :: {Name, Opts, Opts},
Name :: atom(),
Opts :: [term()].
normalise_profile_pairs([], []) ->
[];
normalise_profile_pairs([{P,V}|Ps], []) ->
[{P,V,[]} | normalise_profile_pairs(Ps, [])];
normalise_profile_pairs([], [{P,V}|Ps]) ->
[{P,[],V} | normalise_profile_pairs([], Ps)];
normalise_profile_pairs([{P,VA}|PAs], [{P,VB}|PBs]) ->
[{P,VA,VB} | normalise_profile_pairs(PAs, PBs)];
normalise_profile_pairs([{PA,VA}|PAs], [{PB,VB}|PBs]) when PA < PB ->
[{PA,VA,[]} | normalise_profile_pairs(PAs, [{PB, VB}|PBs])];
normalise_profile_pairs([{PA,VA}|PAs], [{PB,VB}|PBs]) when PA > PB ->
[{PB,[],VB} | normalise_profile_pairs([{PA,VA}|PAs], PBs)].
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