Merge pull request #1080 from project-fifo/crashdump

Write rebar3.crashdump on errors

src/rebar.hrl

@@ -10,6 +10,7 @@
 -define(INFO(Str, Args), rebar_log:log(info, Str, Args)).
 -define(WARN(Str, Args), rebar_log:log(warn, Str, Args)).
 -define(ERROR(Str, Args), rebar_log:log(error, Str, Args)).
+-define(CRASHDUMP(Str, Args), rebar_log:crashdump(Str, Args)).
 
 -define(FMT(Str, Args), lists:flatten(io_lib:format(Str, Args))).
 

src/rebar3.erl

@@ -272,7 +272,8 @@ handle_error({error, rebar_abort}) ->
 handle_error({error, {Module, Reason}}) ->
     case code:which(Module) of
         non_existing ->
-            ?ERROR("Uncaught error in rebar_core. Run with DEBUG=1 to see stacktrace", []),
+            ?CRASHDUMP("~p: ~p~n~p~n~n", [Module, Reason, erlang:get_stacktrace()]),
+            ?ERROR("Uncaught error in rebar_core. Run with DEBUG=1 to stacktrace or consult rebar3.crashdump", []),
             ?DEBUG("Uncaught error: ~p ~p", [Module, Reason]),
             ?INFO("When submitting a bug report, please include the output of `rebar3 report \"your command\"`", []);
         _ ->
@@ -285,7 +286,8 @@ handle_error({error, Error}) when is_list(Error) ->
 handle_error(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", []),
+    ?CRASHDUMP("Error: ~p~n~p~n~n", [Error, erlang:get_stacktrace()]),
+    ?ERROR("Uncaught error in rebar_core. Run with DEBUG=1 to see stacktrace or consult rebar3.crashdump", []),
     ?DEBUG("Uncaught error: ~p", [Error]),
     case erlang:get_stacktrace() of
         [] -> ok;

src/rebar_log.erl

@@ -27,6 +27,7 @@
 -module(rebar_log).
 
 -export([init/2,
+         crashdump/2,
          set_level/1,
          get_level/0,
          error_level/0,
@@ -73,6 +74,7 @@ init(Caller, Verbosity) ->
                 ?DEBUG_LEVEL -> debug
             end,
     Intensity = intensity(),
+    application:set_env(rebar, log_caller, Caller),
     Log = ec_cmd_log:new(Level, Caller, Intensity),
     set_level(valid_level(Verbosity)),
     application:set_env(rebar, log, Log).
@@ -95,6 +97,16 @@ log(Level, Str, Args) ->
     {ok, LogState} = application:get_env(rebar, log),
     ec_cmd_log:Level(LogState, Str++"~n", Args).
 
+crashdump(Str, Args) ->
+    crashdump("rebar3.crashdump", Str, Args).
+crashdump(File, Str, Args) ->
+    case application:get_env(rebar, log_caller) of
+        {ok, api} ->
+            ok;
+        _ ->
+            file:write_file(File, io_lib:fwrite(Str, Args))
+    end.
+
 error_level() -> ?ERROR_LEVEL.
 default_level() -> ?INFO_LEVEL.
 

src/rebar_state.erl

@@ -417,7 +417,8 @@ create_logic_providers(ProviderModules, State0) ->
     catch
         C:T ->
             ?DEBUG("~p: ~p ~p", [C, T, erlang:get_stacktrace()]),
-            throw({error, "Failed creating providers. Run with DEBUG=1 for stacktrace."})
+            ?CRASHDUMP("~p: ~p~n~p~n~n~p", [C, T, erlang:get_stacktrace(), State0]),
+            throw({error, "Failed creating providers. Run with DEBUG=1 for stacktrace or consult rebar3.crashdump."})
     end.
 
 to_list(#state_t{} = State) ->