1 files changed, 38 insertions, 6 deletions

diff --git a/src/rebar_prv_dialyzer.erl b/src/rebar_prv_dialyzer.erl
index 487e9d1..834eb98 100644
--- a/src/rebar_prv_dialyzer.erl
+++ b/src/rebar_prv_dialyzer.erl
@@ -173,7 +173,7 @@ do_update_proj_plt(State, Plt, Output) ->
     case read_plt(State, Plt) of
         {ok, OldFiles} ->
             check_plt(State, Plt, Output, OldFiles, Files);
-        {error, no_such_file} ->
+        error ->
             build_proj_plt(State, Plt, Output, Files)
     end.
 
@@ -252,14 +252,25 @@ read_plt(_State, Plt) ->
     case dialyzer:plt_info(Plt) of
         {ok, Info} ->
             Files = proplists:get_value(files, Info, []),
-            {ok, Files};
-        {error, no_such_file} = Error ->
-            Error;
+            read_plt_files(Plt, Files);
+        {error, no_such_file} ->
+            error;
         {error, read_error} ->
             Error = io_lib:format("Could not read the PLT file ~p", [Plt]),
             throw({dialyzer_error, Error})
     end.
 
+%% If any file no longer exists dialyzer will fail when updating the PLT.
+read_plt_files(Plt, Files) ->
+    case [File || File <- Files, not filelib:is_file(File)] of
+        [] ->
+            {ok, Files};
+        Missing ->
+            ?INFO("Could not find ~p files in ~p...", [length(Missing), Plt]),
+            ?DEBUG("Could not find files: ~p", [Missing]),
+            error
+    end.
+
 check_plt(State, Plt, Output, OldList, FilesList) ->
     Old = sets:from_list(OldList),
     Files = sets:from_list(FilesList),
@@ -337,7 +348,7 @@ update_base_plt(State, BasePlt, Output, BaseFiles) ->
     case read_plt(State, BasePlt) of
         {ok, OldBaseFiles} ->
             check_plt(State, BasePlt, Output, OldBaseFiles, BaseFiles);
-        {error, no_such_file} ->
+        error ->
             _ = filelib:ensure_dir(BasePlt),
             build_plt(State, BasePlt, Output, BaseFiles)
     end.
@@ -386,7 +397,7 @@ run_dialyzer(State, Opts, Output) ->
     case proplists:get_bool(get_warnings, Opts) of
         true ->
             WarningsList = get_config(State, warnings, []),
-            Opts2 = [{warnings, WarningsList},
+            Opts2 = [{warnings, legacy_warnings(WarningsList)},
                      {check_plt, false} |
                      Opts],
             ?DEBUG("Running dialyzer with options: ~p~n", [Opts2]),
@@ -401,6 +412,14 @@ run_dialyzer(State, Opts, Output) ->
             {0, State}
     end.
 
+legacy_warnings(Warnings) ->
+    case dialyzer_version() of
+       TupleVsn when TupleVsn < {2, 8, 0} ->
+            [Warning || Warning <- Warnings, Warning =/= unknown];
+        _ ->
+            Warnings
+    end.
+
 format_warnings(Output, Warnings) ->
     Warnings1 = rebar_dialyzer_format:format_warnings(Warnings),
     console_warnings(Warnings1),
@@ -464,3 +483,16 @@ collect_nested_dependent_apps(App, Seen) ->
                     end
             end
     end.
+
+dialyzer_version() ->
+    _ = application:load(dialyzer),
+    {ok, Vsn} = application:get_key(dialyzer, vsn),
+    case string:tokens(Vsn, ".") of
+        [Major, Minor] ->
+            version_tuple(Major, Minor, "0");
+        [Major, Minor, Patch | _] ->
+            version_tuple(Major, Minor, Patch)
+    end.
+
+version_tuple(Major, Minor, Patch) ->
+    {list_to_integer(Major), list_to_integer(Minor), list_to_integer(Patch)}.