Apply Tidier suggestions

src/rebar.erl

@@ -324,17 +324,15 @@ is_command_name_sub_word_candidate(Command, Candidate) ->
     %% Allow for parts of commands to be abbreviated, i.e. create-app
     %% can be shortened to "create-a", "c-a" or "c-app" (but not
     %% "create-" since that would be ambiguous).
-    CommandSubWords = re:split(Command, "-", [{return, list}]),
-    CandidateSubWords = re:split(Candidate, "-", [{return, list}]),
+    ReOpts = [{return, list}],
+    CommandSubWords = re:split(Command, "-", ReOpts),
+    CandidateSubWords = re:split(Candidate, "-", ReOpts),
     is_command_name_sub_word_candidate_aux(CommandSubWords, CandidateSubWords).
 
-is_command_name_sub_word_candidate_aux([CmdSW | CmdSWs], [CandSW | CandSWs]) ->
-    case lists:prefix(CmdSW, CandSW) of
-        true ->
-            is_command_name_sub_word_candidate_aux(CmdSWs, CandSWs);
-        false ->
-            false
-    end;
+is_command_name_sub_word_candidate_aux([CmdSW | CmdSWs],
+                                       [CandSW | CandSWs]) ->
+    lists:prefix(CmdSW, CandSW) andalso
+        is_command_name_sub_word_candidate_aux(CmdSWs, CandSWs);
 is_command_name_sub_word_candidate_aux([], []) ->
     true;
 is_command_name_sub_word_candidate_aux(_CmdSWs, _CandSWs) ->

src/rebar_appups.erl

@@ -63,9 +63,7 @@
                       filename:join([NewName, "lib"]), "^.*.appup$"),
 
     %% Convert the list of appup files into app names
-    AppUpApps = lists:map(fun(File) ->
-                                  file_to_name(File)
-                          end, NewAppUpFiles),
+    AppUpApps = [file_to_name(File) || File <- NewAppUpFiles],
 
     %% Create a list of apps that don't already have appups
     UpgradeApps = genappup_which_apps(Upgraded, AppUpApps),
@@ -115,7 +113,7 @@ upgraded_app(_, _, _) ->
 app_list_diff(List1, List2) ->
     List3 = lists:umerge(lists:sort(proplists:get_keys(List1)),
                          lists:sort(proplists:get_keys(List2))),
-    lists:subtract(List3, proplists:get_keys(List2)).
+    List3 -- proplists:get_keys(List2).
 
 file_to_name(File) ->
     filename:rootname(filename:basename(File)).
@@ -180,13 +178,10 @@ generate_instruction_advanced(Name, _, _) ->
 
 get_behavior(List) ->
     Attributes = proplists:get_value(attributes, List),
-    Behavior = case proplists:get_value(behavior, Attributes) of
-                   undefined ->
-                       proplists:get_value(behaviour, Attributes);
-                   Else ->
-                       Else
-               end,
-    Behavior.
+    case proplists:get_value(behavior, Attributes) of
+        undefined -> proplists:get_value(behaviour, Attributes);
+        Else -> Else
+    end.
 
 is_code_change(List) ->
     Exports = proplists:get_value(exports, List),

src/rebar_port_compiler.erl

@@ -362,7 +362,7 @@ os_env() ->
     Os = [list_to_tuple(re:split(S, "=", [{return, list}, {parts, 2}])) ||
              S <- os:getenv()],
     %% Drop variables without a name (win32)
-    [{K, V} || {K, V} <- Os, K =/= []].
+    [T1 || {K, _V} = T1 <- Os, K =/= []].
 
 default_env() ->
     [

src/rebar_reltool.erl

@@ -302,7 +302,7 @@ execute_overlay([{template_wildcard, Wildcard, OutDir} | Rest], Vars, BaseDir, T
                    [{template, F, filename:join(OutDir, filename:basename(F))} | Acc0]
            end,
     NewInstrs = lists:foldl(Ifun, Rest, filelib:wildcard(Wildcard, BaseDir)),
-    case length(NewInstrs) == length(Rest) of
+    case length(NewInstrs) =:= length(Rest) of
         true ->
             ?WARN("template_wildcard: ~s did not match any files!\n", [Wildcard]);
         false ->

src/rebar_upgrade.erl

@@ -81,7 +81,8 @@ run_checks(OldVerPath, ReltoolFile) ->
     true = rebar_utils:prop_check(filelib:is_dir(NamePath),
                       "Release directory doesn't exist (~p)~n", [NamePath]),
 
-    {NewName, NewVer} = rebar_rel_utils:get_rel_release_info(Name, NamePath),
+    {NewName, NewVer} = NewNameAndVer =
+        rebar_rel_utils:get_rel_release_info(Name, NamePath),
     {OldName, OldVer} = rebar_rel_utils:get_rel_release_info(Name, OldVerPath),
 
     true = rebar_utils:prop_check(NewName == OldName,
@@ -93,7 +94,7 @@ run_checks(OldVerPath, ReltoolFile) ->
     true = rebar_utils:prop_check(Ver == NewVer,
                       "Reltool and .rel versions do not match~n", []),
 
-    {NewName, NewVer}.
+    NewNameAndVer.
 
 setup(OldVerPath, NewName, NewVer, NameVer) ->
     NewRelPath = filename:join([".", NewName]),