diff options
Diffstat (limited to 'src/rebar_utils.erl')
| -rw-r--r-- | src/rebar_utils.erl | 83 |
1 files changed, 53 insertions, 30 deletions
diff --git a/src/rebar_utils.erl b/src/rebar_utils.erl index 9fe22ea..fb651c3 100644 --- a/src/rebar_utils.erl +++ b/src/rebar_utils.erl @@ -285,7 +285,7 @@ tup_umerge(NewList, OldList) -> tup_umerge_([], Olds) -> Olds; tup_umerge_([New|News], Olds) -> - tup_umerge_dedup_(umerge(News, Olds, [], New), []). + tup_umerge_dedup_(umerge(new, News, Olds, [], New), []). %% removes 100% identical duplicate elements so that %% `[a,{a,b},a,{a,c},a]' returns `[a,{a,b},{a,c}]'. @@ -312,35 +312,58 @@ tup_find(Elem, [Elem1 | Elems]) when is_tuple(Elem1) -> tup_find(Elem, [_Elem | Elems]) -> tup_find(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 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); -umerge(News, [], Merged, Cmp) -> - lists:reverse(News, [Cmp | Merged]). - -%% Similar to stdlib's umerge2_1 in the stdlib, except that when the expanded -%% value/keys compare equal, we check if the element is a full dupe to clear it -%% (like the stdlib function does) or otherwise keep the duplicate around in -%% an order that prioritizes 'New' elements. -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 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); -umerge([], Olds, Merged, CmpMerged, Cmp) when CmpMerged == Cmp -> - lists:reverse(Olds, Merged); -umerge([], Olds, Merged, _CmpMerged, Cmp) -> - lists:reverse(Olds, [Cmp | Merged]). +-spec umerge(new|old, News, Olds, Acc, Current) -> Merged when + News :: [term()], + Olds :: [term()], + Acc :: [term()], + Current :: term(), + Merged :: [term()]. +umerge(_, [], [], Acc, Current) -> + [Current | Acc]; +umerge(new, News, [], Acc, Current) -> + %% only news left + lists:reverse(News, [Current|Acc]); +umerge(old, [], Olds, Acc, Current) -> + %% only olds left + lists:reverse(Olds, [Current|Acc]); +umerge(new, News, [Old|Olds], Acc, Current) -> + {Dir, Merged, NewCurrent} = compare({new, Current}, {old, Old}), + umerge(Dir, News, Olds, [Merged|Acc], NewCurrent); +umerge(old, [New|News], Olds, Acc, Current) -> + {Dir, Merged, NewCurrent} = compare({new, New}, {old, Current}), + umerge(Dir, News, Olds, [Merged|Acc], NewCurrent). + +-spec compare({Priority, term()}, {Secondary, term()}) -> + {NextPriority, Merged, Larger} when + Priority :: new | old, + Secondary :: new | old, + NextPriority :: new | old, + Merged :: term(), + Larger :: term(). +compare({Priority, A}, {Secondary, B}) when is_tuple(A), is_tuple(B) -> + KA = element(1,A), + KB = element(1,B), + if KA == KB -> {Secondary, A, B}; + KA < KB -> {Secondary, A, B}; + KA > KB -> {Priority, B, A} + end; +compare({Priority, A}, {Secondary, B}) when not is_tuple(A), not is_tuple(B) -> + if A == B -> {Secondary, A, B}; + A < B -> {Secondary, A, B}; + A > B -> {Priority, B, A} + end; +compare({Priority, A}, {Secondary, B}) when is_tuple(A), not is_tuple(B) -> + KA = element(1,A), + if KA == B -> {Secondary, A, B}; + KA < B -> {Secondary, A, B}; + KA > B -> {Priority, B, A} + end; +compare({Priority, A}, {Secondary, B}) when not is_tuple(A), is_tuple(B) -> + KB = element(1,B), + if A == KB -> {Secondary, A, B}; + A < KB -> {Secondary, A, B}; + A > KB -> {Priority, B, A} + end. %% Implements wc -l functionality used to determine patchcount from git output line_count(PatchLines) -> |