diff options
Diffstat (limited to 'src/rebar_utils.erl')
| -rw-r--r-- | src/rebar_utils.erl | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/src/rebar_utils.erl b/src/rebar_utils.erl index ea60e42..9fe22ea 100644 --- a/src/rebar_utils.erl +++ b/src/rebar_utils.erl @@ -285,7 +285,18 @@ tup_umerge(NewList, OldList) -> tup_umerge_([], Olds) -> Olds; tup_umerge_([New|News], Olds) -> - lists:reverse(umerge(News, Olds, [], New)). + tup_umerge_dedup_(umerge(News, Olds, [], New), []). + +%% removes 100% identical duplicate elements so that +%% `[a,{a,b},a,{a,c},a]' returns `[a,{a,b},{a,c}]'. +%% Operates on a reverted list that gets reversed as part of this pass +tup_umerge_dedup_([], Acc) -> + Acc; +tup_umerge_dedup_([H|T], Acc) -> + case lists:member(H,T) of + true -> tup_umerge_dedup_(T, Acc); + false -> tup_umerge_dedup_(T, [H|Acc]) + end. tup_find(_Elem, []) -> false; @@ -304,9 +315,9 @@ tup_find(Elem, [_Elem | Elems]) -> %% This is equivalent to umerge2_2 in the stdlib, except we use the expanded %% value/key only to compare umerge(News, [Old|Olds], Merged, Cmp) when element(1, Cmp) == element(1, Old); - element(1, Cmp) == Old; - Cmp == element(1, Old); - Cmp =< Old -> + element(1, Cmp) == Old andalso not is_tuple(Old); + Cmp == element(1, Old) andalso not is_tuple(Cmp); + Cmp =< Old andalso not is_tuple(Cmp) andalso not is_tuple(Old) -> umerge(News, Olds, [Cmp | Merged], Cmp, Old); umerge(News, [Old|Olds], Merged, Cmp) -> umerge(News, Olds, [Old | Merged], Cmp); @@ -320,9 +331,9 @@ umerge(News, [], Merged, Cmp) -> umerge([New|News], Olds, Merged, CmpMerged, Cmp) when CmpMerged == Cmp -> umerge(News, Olds, Merged, New); umerge([New|News], Olds, Merged, _CmpMerged, Cmp) when element(1,New) == element(1, Cmp); - element(1,New) == Cmp; - New == element(1, Cmp); - New =< Cmp -> + element(1,New) == Cmp andalso not is_tuple(Cmp); + New == element(1, Cmp) andalso not is_tuple(New); + New =< Cmp andalso not is_tuple(New) andalso not is_tuple(Cmp) -> umerge(News, Olds, [New | Merged], New, Cmp); umerge([New|News], Olds, Merged, _CmpMerged, Cmp) -> % > umerge(News, Olds, [Cmp | Merged], New); |