print error message for failed fetch

src/rebar3.erl

@@ -47,9 +47,9 @@ main(Args) ->
         {ok, _State} ->
             ok;
         rebar_abort ->
-            rebar_utils:delayed_halt(1);
+            erlang:halt(1);
         {error, rebar_abort} ->
-            rebar_utils:delayed_halt(1);
+            erlang:halt(1);
         {error, {Module, Reason}} ->
             case code:which(Module) of
                 non_existing ->
@@ -58,16 +58,16 @@ main(Args) ->
                 _ ->
                     ?ERROR(Module:format_error(Reason), [])
             end,
-            rebar_utils:delayed_halt(1);
+            erlang:halt(1);
         {error, Error} when is_list(Error) ->
             ?ERROR(Error, []),
-            rebar_utils:delayed_halt(1);
+            erlang:halt(1);
         Error ->
             %% Nothing should percolate up from rebar_core;
             %% Dump this error to console
             ?ERROR("Uncaught error in rebar_core. Run with DEBUG=1 to see stacktrace", []),
             ?DEBUG("Uncaught error: ~p", [Error]),
-            rebar_utils:delayed_halt(1)
+            erlang:halt(1)
     end.
 
 %% Erlang-API entry point

src/rebar_fetch.erl

@@ -11,6 +11,8 @@
          download_source/2,
          needs_update/2]).
 
+-export([format_error/1]).
+
 -include("rebar.hrl").
 
 %% map short versions of resources to module names
@@ -47,8 +49,8 @@ download_source(AppDir, Source) ->
                 true
         end
     catch
-        _:E ->
-            {error, E}
+        _:_ ->
+            {error, {rebar_fetch, {fetch_fail, Source}}}
     end.
 
 -spec needs_update(file:filename_all(), rebar_resource:resource()) -> boolean() | {error, string()}.
@@ -61,6 +63,9 @@ needs_update(AppDir, Source) ->
             true
     end.
 
+format_error({fetch_fail, Source}) ->
+    io_lib:format("Failed to fetch and copy dep: ~p", [Source]).
+
 get_resource_type({Type, Location}) ->
     find_resource_module(Type, Location);
 get_resource_type({Type, Location, _}) ->

src/rebar_utils.erl

@@ -45,7 +45,6 @@
          vcs_vsn/3,
          deprecated/3,
          deprecated/4,
-         delayed_halt/1,
          erl_opts/1,
          indent/1,
          cleanup_code_path/1]).
@@ -205,27 +204,6 @@ deprecated(Old, New, When) ->
         "'~p' will be removed ~s.~n">>,
       [Old, Old, New, Old, When]).
 
--spec delayed_halt(integer()) -> no_return().
-delayed_halt(Code) ->
-    %% Work around buffer flushing issue in erlang:halt if OTP older
-    %% than R15B01.
-    %% TODO: remove workaround once we require R15B01 or newer
-    %% R15B01 introduced erlang:halt/2
-    case erlang:is_builtin(erlang, halt, 2) of
-        true ->
-            halt(Code);
-        false ->
-            case os:type() of
-                {win32, nt} ->
-                    timer:sleep(100),
-                    halt(Code);
-                _ ->
-                    halt(Code),
-                    %% workaround to delay exit until all output is written
-                    receive after infinity -> ok end
-            end
-    end.
-
 %% @doc Return list of erl_opts
 -spec erl_opts(rebar_state:t()) -> list().
 erl_opts(Config) ->