Merge pull request #2732 from ferd/minor-warning-fixes

Reduce warnings around bootstrap and DAG operations

apps/rebar/src/rebar_compiler_erl.erl

@@ -301,6 +301,10 @@ compile_info(Target) ->
             CompileVsn = proplists:get_value(version, CompileInfo, "unknown"),
             {ok, [{compiler_version, CompileVsn}
                   | proplists:get_value(options, CompileInfo, [])]};
+        {error, beam_lib, {file_error, _, enoent}=Reason} ->
+            %% It's normal not to find a given file if this is a first build
+            ?DEBUG("Couldn't read debug info from ~p for reason: ~p", [Target, Reason]),
+            {error, Reason};
         {error, beam_lib, Reason} ->
             ?WARN("Couldn't read debug info from ~p for reason: ~p", [Target, Reason]),
             {error, Reason}

bootstrap

@@ -32,10 +32,8 @@ main(Args) ->
     rm_rf("_build/prod"),
     %% The same pattern happens with default/ as well, particularly when
     %% developing new things.
-    %% Keep other deps in <profile>/lib for build environments like Nix
-    %% where internet access is disabled that deps are not downloadable.
-    rm_rf("_build/default/lib/rebar"),
-    rm_rf("_build/test/lib/rebar"),
+    rm_rf("_build/default/"),
+    rm_rf("_build/test/"),
 
     filelib:ensure_dir("_build/bootstrap/lib/rebar/ebin/"),