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Diffstat (limited to 'src/rebar_digraph.erl')
| -rw-r--r-- | src/rebar_digraph.erl | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/rebar_digraph.erl b/src/rebar_digraph.erl index bb031cb..dbcf649 100644 --- a/src/rebar_digraph.erl +++ b/src/rebar_digraph.erl @@ -18,7 +18,15 @@ compile_order(Apps) -> end, Apps), case digraph_utils:topsort(Graph) of false -> - {error, no_sort}; + case digraph_utils:is_acyclic(Graph) of + true -> + {error, no_sort}; + false -> + Cycles = lists:sort( + [lists:sort(Comp) || Comp <- digraph_utils:strong_components(Graph), + length(Comp)>1]), + {error, {cycles, Cycles}} + end; V -> {ok, names_to_apps(lists:reverse(V), Apps)} end. |