Refactor shared error reporting code

src/rebar_base_compiler.erl

@@ -29,7 +29,7 @@
 -include("rebar.hrl").
 
 -export([run/4, run/7, run/8,
-         format_errors/2, format_warnings/2, format_warnings/3]).
+         ok_tuple/2, error_tuple/4]).
 
 
 %% ===================================================================
@@ -80,18 +80,11 @@ run(Config, FirstFiles, SourceDir, SourceExt, TargetDir, TargetExt,
                 simple_compile_wrapper(S, Target, Compile3Fn, C, CheckLastMod)
         end).
 
-format_errors(Source, Errors) ->
-    format_errors(Source, "", Errors).
-
-format_warnings(Source, Warnings) ->
-    format_warnings(Source, Warnings, []).
+ok_tuple(Source, Ws) ->
+    {ok, format_warnings(Source, Ws)}.
 
-format_warnings(Source, Warnings, Opts) ->
-    Prefix = case lists:member(warnings_as_errors, Opts) of
-                 true -> "";
-                 false -> "Warning: "
-             end,
-    format_errors(Source, Prefix, Warnings).
+error_tuple(Source, Es, Ws, Opts) ->
+    {error, format_errors(Source, Es), format_warnings(Source, Ws, Opts)}.
 
 %% ===================================================================
 %% Internal functions
@@ -218,6 +211,19 @@ compile_worker(QueuePid, Config, CompileFn) ->
             ok
     end.
 
+format_errors(Source, Errors) ->
+    format_errors(Source, "", Errors).
+
+format_warnings(Source, Warnings) ->
+    format_warnings(Source, Warnings, []).
+
+format_warnings(Source, Warnings, Opts) ->
+    Prefix = case lists:member(warnings_as_errors, Opts) of
+                 true -> "";
+                 false -> "Warning: "
+             end,
+    format_errors(Source, Prefix, Warnings).
+
 maybe_report([{error, {error, _Es, _Ws}=ErrorsAndWarnings}, {source, _}]) ->
     maybe_report(ErrorsAndWarnings);
 maybe_report({error, Es, Ws}) ->

src/rebar_erlc_compiler.erl

@@ -262,10 +262,9 @@ internal_erl_compile(Source, Config, Outdir, ErlOpts) ->
                 {ok, _Mod} ->
                     ok;
                 {ok, _Mod, Ws} ->
-                    {ok, rebar_base_compiler:format_warnings(Source, Ws)};
+                    rebar_base_compiler:ok_tuple(Source, Ws);
                 {error, Es, Ws} ->
-                    {error, rebar_base_compiler:format_errors(Source, Es),
-                     rebar_base_compiler:format_warnings(Source, Ws, Opts)}
+                    rebar_base_compiler:error_tuple(Source, Es, Ws, Opts)
             end;
         false ->
             skipped
@@ -310,10 +309,9 @@ compile_xrl_yrl(Source, Target, Opts, Mod) ->
                 {ok, _} ->
                     ok;
                 {ok, _Mod, Ws} ->
-                    {ok, rebar_base_compiler:format_warnings(Source, Ws)};
+                    rebar_base_compiler:ok_tuple(Source, Ws);
                 {error, Es, Ws} ->
-                    {error, rebar_base_compiler:format_errors(Source, Es),
-                     rebar_base_compiler:format_warnings(Source, Ws, Opts)}
+                    rebar_base_compiler:error_tuple(Source, Es, Ws, Opts)
             end;
         false ->
             skipped

src/rebar_lfe_compiler.erl

@@ -63,10 +63,9 @@ compile_lfe(Source, _Target, Config) ->
                 ++ rebar_config:get_list(Config, erl_opts, []),
             case lfe_comp:file(Source, Opts) of
                 {ok, _Mod, Ws} ->
-                    {ok, rebar_base_compiler:format_warnings(Source, Ws)};
+                    rebar_base_compiler:ok_tuple(Source, Ws);
                 {error, Es, Ws} ->
-                    {error, rebar_base_compiler:format_errors(Source, Es),
-                     rebar_base_compiler:format_warnings(Source, Ws, Opts)};
+                    rebar_base_compiler:error_tuple(Source, Es, Ws, Opts);
                 _ ->
                     ?ABORT
             end