1 files changed, 11 insertions, 66 deletions

diff --git a/src/rebar_digraph.erl b/src/rebar_digraph.erl
index decc542..1198530 100644
--- a/src/rebar_digraph.erl
+++ b/src/rebar_digraph.erl
@@ -1,86 +1,28 @@
 -module(rebar_digraph).
 
--export([check_graph/2
-        ,restore_graph/1
-        ,store_graph/3
+-export([restore_graph/1
         ,solve/2
-        ,subgraph/2]).
+        ,subgraph/2
+        ,format_error/1]).
 
 -include("rebar.hrl").
 
-check_graph(_File, #graph{vsn=?GRAPH_VSN}) ->
-    ok;
-check_graph(File, #graph{vsn=Vsn}) ->
-    ?ABORT("~s file version is incompatible. expected: ~b got: ~b",
-           [File, ?GRAPH_VSN, Vsn]);
-check_graph(File, _) ->
-    ?ABORT("~s file is invalid. Please delete before next run.",
-           [File]).
-
 restore_graph({Vs, Es}) ->
-    G = digraph:new(),
+    Graph = digraph:new(),
     lists:foreach(fun({V, LastUpdated}) ->
-                          digraph:add_vertex(G, V, LastUpdated)
+                          digraph:add_vertex(Graph, V, LastUpdated)
                   end, Vs),
     lists:foreach(fun({V1, V2}) ->
-                          digraph:add_edge(G, V1, V2)
+                          digraph:add_edge(Graph, V1, V2)
                   end, Es),
-    G;
-restore_graph(File) ->
-    G = digraph:new(),
-    case file:read_file(File) of
-        {ok, Data} ->
-            try binary_to_term(Data) of
-                G ->
-                    %% ok = check_erlcinfo(Config, Graph),
-                    #graph{info=Graph} = G,
-                    {Vs, Es} = Graph,
-                    lists:foreach(
-                      fun({V, LastUpdated}) ->
-                              digraph:add_vertex(G, V, LastUpdated)
-                      end, Vs),
-                    lists:foreach(
-                      fun({V1, V2}) ->
-                              digraph:add_edge(G, V1, V2)
-                      end, Es)
-            catch
-                error:badarg ->
-                    ?ERROR(
-                       "Failed (binary_to_term) to restore rebar info file."
-                       " Discard file.", []),
-                    ok
-            end;
-        _Err ->
-            ok
-    end,
-    G.
-
-store_graph(_G, _File, _Modified = false) ->
-    ok;
-store_graph(G, File, _Modified) ->
-    Vs = lists:map(
-           fun(V) ->
-                   digraph:vertex(G, V)
-           end, digraph:vertices(G)),
-    Es = lists:flatmap(
-           fun({V, _}) ->
-                   lists:map(
-                     fun(E) ->
-                             {_, V1, V2, _} = digraph:edge(G, E),
-                             {V1, V2}
-                     end, digraph:out_edges(G, V))
-           end, Vs),
-
-    ok = filelib:ensure_dir(File),
-    Data = term_to_binary(#graph{info={Vs, Es}}, [{compressed, 9}]),
-    file:write_file(File, Data).
+    Graph.
 
 solve(Graph, Vertices) ->
     solve(Graph, Vertices, dict:new()).
 
 solve(_Graph, [], Solution) ->
     {_, Vertices} = lists:unzip(dict:to_list(Solution)),
-    Vertices;
+    {ok, Vertices};
 solve(Graph, Vertices, Solution) ->
     {NV, NS} =
         lists:foldl(fun(V, {NewVertices, SolutionAcc}) ->
@@ -99,3 +41,6 @@ solve(Graph, Vertices, Solution) ->
 
 subgraph(Graph, Vertices) ->
     digraph_utils:subgraph(Graph, Vertices).
+
+format_error(no_solution) ->
+    io_lib:format("No solution for packages found.", []).