Tidier improvements

16 files changed, 78 insertions, 99 deletions

diff --git a/src/mustache.erl b/src/mustache.erl
index a713bd8..df81aed 100644
--- a/src/mustache.erl
+++ b/src/mustache.erl
@@ -171,13 +171,13 @@ get(Key, Ctx, Mod) ->
     error ->
       case erlang:function_exported(Mod, Key, 1) of
         true ->
-          Val = to_s(apply(Mod, Key, [Ctx])),
+          Val = to_s(Mod:Key(Ctx)),
           % io:format("From Mod/1 {~p, ~p}~n", [Key, Val]),
           Val;
         false ->
           case erlang:function_exported(Mod, Key, 0) of
             true ->
-              Val = to_s(apply(Mod, Key, [])),
+              Val = to_s(Mod:Key()),
               % io:format("From Mod/0 {~p, ~p}~n", [Key, Val]),
               Val;
             false ->
diff --git a/src/rebar_app_utils.erl b/src/rebar_app_utils.erl
index 4d56ab2..9574775 100644
--- a/src/rebar_app_utils.erl
+++ b/src/rebar_app_utils.erl
@@ -63,7 +63,7 @@ is_app_dir(Dir) ->
 is_app_src(Filename) ->
     %% If removing the extension .app.src yields a shorter name,
     %% this is an .app.src file.
-    Filename /= filename:rootname(Filename, ".app.src").
+    Filename =/= filename:rootname(Filename, ".app.src").
 
 app_src_to_app(Filename) ->
     filename:join("ebin", filename:basename(Filename, ".app.src") ++ ".app").
@@ -101,14 +101,15 @@ app_vsn(AppFile) ->
 %% ===================================================================
 
 load_app_file(Filename) ->
-    case erlang:get({app_file, Filename}) of
+    AppFile = {app_file, Filename},
+    case erlang:get(AppFile) of
         undefined ->
             case file:consult(Filename) of
                 {ok, [{application, AppName, AppData}]} ->
-                    erlang:put({app_file, Filename}, {AppName, AppData}),
+                    erlang:put(AppFile, {AppName, AppData}),
                     {ok, AppName, AppData};
-                {error, Reason} ->
-                    {error, Reason};
+                {error, _} = Error ->
+                    Error;
                 Other ->
                     {error, {unexpected_terms, Other}}
             end;
diff --git a/src/rebar_base_compiler.erl b/src/rebar_base_compiler.erl
index a83ffe5..aea55df 100644
--- a/src/rebar_base_compiler.erl
+++ b/src/rebar_base_compiler.erl
@@ -66,7 +66,7 @@ run(Config, FirstFiles, SourceDir, SourceExt, TargetDir, TargetExt,
 
     %% Remove first files from found files
     RestFiles = [Source || Source <- FoundFiles,
-                           lists:member(Source, FirstFiles) == false],
+                           not lists:member(Source, FirstFiles)],
 
     %% Check opts for flag indicating that compile should check lastmod
     CheckLastMod = proplists:get_bool(check_last_mod, Opts),
diff --git a/src/rebar_config.erl b/src/rebar_config.erl
index 8528d5f..ccabed0 100644
--- a/src/rebar_config.erl
+++ b/src/rebar_config.erl
@@ -96,12 +96,7 @@ get_global(Key, Default) ->
     end.
 
 is_verbose() ->
-    case get_global(verbose, "0") of
-        "1" ->
-            true;
-        _ ->
-            false
-    end.
+    get_global(verbose, "0") =:= "1".
 
 get_jobs() ->
     get_global(jobs, 3).
diff --git a/src/rebar_core.erl b/src/rebar_core.erl
index a89510c..510732e 100644
--- a/src/rebar_core.erl
+++ b/src/rebar_core.erl
@@ -86,20 +86,21 @@ run(RawArgs) ->
     process_commands(CommandAtoms).
 
 skip_dir(Dir) ->
-    case erlang:get({skip_dir, Dir}) of
+    SkipDir = {skip_dir, Dir},
+    case erlang:get(SkipDir) of
         undefined ->
             ?DEBUG("Adding skip dir: ~s\n", [Dir]),
-            erlang:put({skip_dir, Dir}, true);
+            erlang:put(SkipDir, true);
         true ->
             ok
     end.
 
 is_skip_dir(Dir) ->
     case erlang:get({skip_dir, Dir}) of
-        undefined ->
-            false;
-        true ->
-            true
+	undefined ->
+	    false;
+	true ->
+	    true
     end.
 
 skip_dirs() ->
@@ -465,7 +466,7 @@ restore_code_path(no_change) ->
 restore_code_path({old, Path}) ->
     %% Verify that all of the paths still exist -- some dynamically add paths
     %% can get blown away during clean.
-    true = code:set_path(lists:filter(fun filelib:is_file/1, Path)),
+    true = code:set_path([F || F <- Path, filelib:is_file(F)]),
     ok.
 
 
@@ -495,8 +496,8 @@ run_modules([Module | Rest], Command, Config, File) ->
     case Module:Command(Config, File) of
         ok ->
             run_modules(Rest, Command, Config, File);
-        {error, Reason} ->
-            {error, Reason}
+        {error, _} = Error ->
+            Error
     end.
 
 
diff --git a/src/rebar_deps.erl b/src/rebar_deps.erl
index 3e26812..fcc1436 100644
--- a/src/rebar_deps.erl
+++ b/src/rebar_deps.erl
@@ -201,11 +201,8 @@ delete_dep(D) ->
     end.
 
 require_source_engine(Source) ->
-    case source_engine_avail(Source) of
-        true ->
-            ok
-    end.
-
+    true = source_engine_avail(Source),
+    ok.
 
 is_app_available(App, VsnRegex) ->
     case code:lib_dir(App) of
diff --git a/src/rebar_dialyzer.erl b/src/rebar_dialyzer.erl
index d2b89aa..3fe9b7e 100644
--- a/src/rebar_dialyzer.erl
+++ b/src/rebar_dialyzer.erl
@@ -142,8 +142,8 @@ dialyze(Config, File) ->
 %% @spec app_dirs(Apps::[atom()]) -> [string()]
 -spec app_dirs(Apps::[atom()]) -> [string()].
 app_dirs(Apps) ->
-    [filename:join(Path, "ebin") ||
-        Path <- lists:map(fun(App) -> code:lib_dir(App) end, Apps), erlang:is_list(Path)].
+    [filename:join(Path, "ebin")
+     || Path <- [code:lib_dir(App) || App <- Apps], erlang:is_list(Path)].
 
 %% @doc Render the warnings on the console.
 %% @spec output_warnings(Warnings::[warning()]) -> 'ok'
diff --git a/src/rebar_erlc_compiler.erl b/src/rebar_erlc_compiler.erl
index e0d4def..50e890c 100644
--- a/src/rebar_erlc_compiler.erl
+++ b/src/rebar_erlc_compiler.erl
@@ -104,11 +104,11 @@ doterl_compile(Config, OutDir, MoreSources) ->
     ErlOpts = filter_defines(rebar_config:get(Config, erl_opts, []), []),
     ?DEBUG("erl_opts ~p~n",[ErlOpts]),
     %% Support the src_dirs option allowing multiple directories to
-    %% contain erlang source. This might be used, for example, should eunit tests be
-    %% separated from the core application source.
+    %% contain erlang source. This might be used, for example, should
+    %% eunit tests be separated from the core application source.
     SrcDirs = src_dirs(proplists:append_values(src_dirs, ErlOpts)),
     RestErls  = [Source || Source <- gather_src(SrcDirs, []) ++ MoreSources,
-                           lists:member(Source, FirstErls) == false],
+                           not lists:member(Source, FirstErls)],
 
     % Split RestErls so that parse_transforms and behaviours are instead added
     % to erl_first_files, parse transforms first.
@@ -131,8 +131,8 @@ doterl_compile(Config, OutDir, MoreSources) ->
     CurrPath = code:get_path(),
     true = code:add_path("ebin"),
     rebar_base_compiler:run(Config, NewFirstErls, OtherErls,
-                            fun(S, C) -> internal_erl_compile(S, C, OutDir,
-                                                              ErlOpts)
+                            fun(S, C) ->
+                                    internal_erl_compile(S, C, OutDir, ErlOpts)
                             end),
     true = code:set_path(CurrPath),
     ok.
diff --git a/src/rebar_erlydtl_compiler.erl b/src/rebar_erlydtl_compiler.erl
index 32c50a7..b3cbd98 100644
--- a/src/rebar_erlydtl_compiler.erl
+++ b/src/rebar_erlydtl_compiler.erl
@@ -149,31 +149,27 @@ module_name(Target) ->
 
 needs_compile(Source, Target, Config) ->
     LM = filelib:last_modified(Target),
-    case LM < filelib:last_modified(Source) of
-        true  -> true;
-        false ->
-            lists:any(fun(D) -> LM < filelib:last_modified(D) end,
-                      referenced_dtls(Source, Config))
-    end.
+    LM < filelib:last_modified(Source) orelse
+        lists:any(fun(D) -> LM < filelib:last_modified(D) end,
+                  referenced_dtls(Source, Config)).
 
 referenced_dtls(Source, Config) ->
     Set = referenced_dtls1([Source], Config,
                           sets:add_element(Source, sets:new())),
-    Final = sets:to_list(sets:del_element(Source, Set)),
-    Final.
+    sets:to_list(sets:del_element(Source, Set)).
 
 referenced_dtls1(Step, Config, Seen) ->
     DtlOpts = erlydtl_opts(Config),
     ExtMatch = re:replace(option(source_ext, DtlOpts), "\.", "\\\\\\\\.",
                           [{return, list}]),
     AllRefs = lists:append(
-                [ string:tokens(
-                    os:cmd(["grep -o [^\\\"]*",ExtMatch," ",F]),
-                    "\n")
-                  || F <- Step]),
+                [string:tokens(
+                   os:cmd(["grep -o [^\\\"]*",ExtMatch," ",F]),
+                   "\n")
+                 || F <- Step]),
     DocRoot = option(doc_root, DtlOpts),
     WithPaths = [ filename:join([DocRoot, F]) || F <- AllRefs ],
-    Existing = lists:filter(fun filelib:is_file/1, WithPaths),
+    Existing = [F || F <- WithPaths, filelib:is_file(F)],
     New = sets:subtract(sets:from_list(Existing), Seen),
     case sets:size(New) of
         0 -> Seen;
diff --git a/src/rebar_eunit.erl b/src/rebar_eunit.erl
index 138b4f5..1341f9d 100644
--- a/src/rebar_eunit.erl
+++ b/src/rebar_eunit.erl
@@ -286,9 +286,8 @@ is_eunitized(Mod) ->
         has_header(Mod, "include/eunit.hrl").
 
 has_eunit_test_fun(Mod) ->
-    length([F || {exports, Funs} <- Mod:module_info(),
-                    {F, 0} <- Funs,
-                    F == test]) =/= 0.
+    [F || {exports, Funs} <- Mod:module_info(),
+	  {F, 0} <- Funs, F =:= test] =/= [].
 
 has_header(Mod, Header) ->
     Mod1 = case code:which(Mod) of 
@@ -300,8 +299,8 @@ has_header(Mod, Header) ->
                L -> L
            end,
     {ok, {_, [{abstract_code, {_, AC}}]}} = beam_lib:chunks(Mod1, [abstract_code]),
-    length([F || {attribute, 1, file, {F, 1}} <- AC,
-                 string:str(F, Header) =/= 0]) =/= 0.
+    [F || {attribute, 1, file, {F, 1}} <- AC,
+          string:str(F, Header) =/= 0] =/= [].
 
 align_notcovered_count(Module, Covered, NotCovered, false) ->
     {Module, Covered, NotCovered};
diff --git a/src/rebar_neotoma_compiler.erl b/src/rebar_neotoma_compiler.erl
index 586b102..89cd089 100644
--- a/src/rebar_neotoma_compiler.erl
+++ b/src/rebar_neotoma_compiler.erl
@@ -108,31 +108,27 @@ do_compile(Source, _Target, Config) ->
   
 needs_compile(Source, Target, Config) ->
     LM = filelib:last_modified(Target),
-    case LM < filelib:last_modified(Source) of
-        true  -> true;
-        false ->
-            lists:any(fun(D) -> LM < filelib:last_modified(D) end,
-                      referenced_pegs(Source, Config))
-    end.
+    LM < filelib:last_modified(Source) orelse
+        lists:any(fun(D) -> LM < filelib:last_modified(D) end,
+                  referenced_pegs(Source, Config)).
     
 referenced_pegs(Source, Config) ->
     Set = referenced_pegs1([Source], Config,
                           sets:add_element(Source, sets:new())),
-    Final = sets:to_list(sets:del_element(Source, Set)),
-    Final.
+    sets:to_list(sets:del_element(Source, Set)).
 
 referenced_pegs1(Step, Config, Seen) ->
     NeoOpts = neotoma_opts(Config),
     ExtMatch = re:replace(option(source_ext, NeoOpts), "\.", "\\\\\\\\.",
                           [{return, list}]),
     AllRefs = lists:append(
-                [ string:tokens(
-                    os:cmd(["grep -o [^\\\"]*",ExtMatch," ",F]),
-                    "\n")
-                  || F <- Step]),
+                [string:tokens(
+                   os:cmd(["grep -o [^\\\"]*",ExtMatch," ",F]),
+                   "\n")
+                 || F <- Step]),
     DocRoot = option(doc_root, NeoOpts),
     WithPaths = [ filename:join([DocRoot, F]) || F <- AllRefs ],
-    Existing = lists:filter(fun filelib:is_file/1, WithPaths),
+    Existing = [F || F <- WithPaths, filelib:is_file(F)],
     New = sets:subtract(sets:from_list(Existing), Seen),
     case sets:size(New) of
         0 -> Seen;
diff --git a/src/rebar_port_compiler.erl b/src/rebar_port_compiler.erl
index d962b28..732965c 100644
--- a/src/rebar_port_compiler.erl
+++ b/src/rebar_port_compiler.erl
@@ -137,9 +137,8 @@ expand_sources([Spec | Rest], Acc) ->
     expand_sources(Rest, Acc2).
     
 expand_objects(Sources) ->
-  lists:map(fun(File) ->
-      filename:join([filename:dirname(File),filename:basename(File) ++ ".o"])
-    end, Sources).
+    [filename:join([filename:dirname(F), filename:basename(F) ++ ".o"])
+     || F <- Sources].
 
 run_precompile_hook(Config, Env) ->
     case rebar_config:get(Config, port_pre_script, undefined) of
diff --git a/src/rebar_protobuffs_compiler.erl b/src/rebar_protobuffs_compiler.erl
index 6118562..122440c 100644
--- a/src/rebar_protobuffs_compiler.erl
+++ b/src/rebar_protobuffs_compiler.erl
@@ -74,13 +74,7 @@ clean(_Config, _AppFile) ->
 %% ===================================================================
 
 protobuffs_is_present() ->
-    case code:which(protobuffs_compile) of
-        non_existing ->
-            false;
-        _ ->
-            true
-    end.
-
+    code:which(protobuffs_compile) =/= non_existing.
 
 beam_file(Proto) ->
     filename:basename(Proto, ".proto") ++ "_pb.beam".
diff --git a/src/rebar_reltool.erl b/src/rebar_reltool.erl
index d01dbd0..024870e 100644
--- a/src/rebar_reltool.erl
+++ b/src/rebar_reltool.erl
@@ -106,9 +106,9 @@ load_config(ReltoolFile) ->
 %% can't run reltool.
 %%
 sys_tuple(ReltoolConfig) ->
-    case lists:keysearch(sys, 1, ReltoolConfig) of
-        {value, {sys, Data}} ->
-            {sys, Data};
+    case lists:keyfind(sys, 1, ReltoolConfig) of
+        {sys, _} = SysTuple ->
+            SysTuple;
         false ->
             ?ABORT("Failed to find {sys, [...]} tuple in reltool.config.", [])
     end.
@@ -120,13 +120,13 @@ sys_tuple(ReltoolConfig) ->
 target_dir(ReltoolConfig) ->
     case rebar_config:get_global(target_dir, undefined) of
         undefined ->
-            case lists:keysearch(target_dir, 1, ReltoolConfig) of
-                {value, {target_dir, TargetDir}} ->
+            case lists:keyfind(target_dir, 1, ReltoolConfig) of
+                {target_dir, TargetDir} ->
                     filename:absname(TargetDir);
                 false ->
                     {sys, SysInfo} = sys_tuple(ReltoolConfig),
-                    case lists:keysearch(rel, 1, SysInfo) of
-                        {value, {rel, Name, _Vsn, _Apps}} ->
+                    case lists:keyfind(rel, 1, SysInfo) of
+                        {rel, Name, _Vsn, _Apps} ->
                             filename:absname(Name);
                         false ->
                             filename:absname("target")
@@ -144,8 +144,8 @@ target_dir(ReltoolConfig) ->
 overlay_vars(ReltoolConfig) ->
     case rebar_config:get_global(overlay_vars, undefined) of
         undefined ->
-            case lists:keysearch(overlay_vars, 1, ReltoolConfig) of
-                {value, {overlay_vars, File}} ->
+            case lists:keyfind(overlay_vars, 1, ReltoolConfig) of
+                {overlay_vars, File} ->
                     File;
                 false ->
                     undefined
@@ -156,8 +156,10 @@ overlay_vars(ReltoolConfig) ->
 
 
 validate_rel_apps(ReltoolServer, {sys, ReltoolConfig}) ->
-    case lists:keysearch(rel, 1, ReltoolConfig) of
-        {value, {rel, _Name, _Vsn, Apps}} ->
+    case lists:keyfind(rel, 1, ReltoolConfig) of
+        false ->
+            ok;
+        {rel, _Name, _Vsn, Apps} ->
             %% Identify all the apps that do NOT exist, based on what's available
             %% from the reltool server
             Missing = lists:sort([App || App <- Apps,
@@ -168,11 +170,9 @@ validate_rel_apps(ReltoolServer, {sys, ReltoolConfig}) ->
                 _ ->
                     ?ABORT("Apps in {rel, ...} section not found by reltool: ~p\n", [Missing])
             end;
-        {value, Rel} ->
+        Rel ->
             %% Invalid release format!
-            ?ABORT("Invalid {rel, ...} section in reltools.config: ~p\n", [Rel]);
-        false ->
-            ok
+            ?ABORT("Invalid {rel, ...} section in reltools.config: ~p\n", [Rel])
     end.
 
 app_exists(App, Server) when is_atom(App) ->
@@ -330,9 +330,10 @@ execute_overlay([Other | _Rest], _Vars, _BaseDir, _TargetDir) ->
 %% Render a binary to a string, using mustache and the specified context
 %%
 render(Bin, Context) ->
+    ReOpts = [global, {return, list}],
     %% Be sure to escape any double-quotes before rendering...
-    Str0 = re:replace(Bin, "\\\\", "\\\\\\", [global, {return, list}]),
-    Str1 = re:replace(Str0, "\"", "\\\\\"", [global, {return,list}]),
+    Str0 = re:replace(Bin, "\\\\", "\\\\\\", ReOpts),
+    Str1 = re:replace(Str0, "\"", "\\\\\"", ReOpts),
     mustache:render(Str1, Context).
 
 
diff --git a/src/rebar_templater.erl b/src/rebar_templater.erl
index 56ea1e4..4aa5ed6 100644
--- a/src/rebar_templater.erl
+++ b/src/rebar_templater.erl
@@ -84,8 +84,8 @@ create(_Config, _) ->
     %% Load the template definition as is and get the list of variables the
     %% template requires.
     TemplateTerms = consult(load_file(Type, Template)),
-    case lists:keysearch(variables, 1, TemplateTerms) of
-        {value, {variables, Vars}} ->
+    case lists:keyfind(variables, 1, TemplateTerms) of
+        {variables, Vars} ->
             case parse_vars(Vars, dict:new()) of
                 {error, Entry} ->
                     Context0 = undefined,
@@ -270,8 +270,8 @@ write_file(Output, Data, Force) ->
 %% Execute each instruction in a template definition file.
 %%
 execute_template([], _TemplateType, _TemplateName, _Context, _Force, ExistingFiles) ->
-    case length(ExistingFiles) of
-        0 ->
+    case ExistingFiles of
+        [] ->
             ok;
         _ ->
             Msg = lists:flatten([io_lib:format("\t* ~p~n", [F]) || F <- lists:reverse(ExistingFiles)]),
diff --git a/src/rebar_utils.erl b/src/rebar_utils.erl
index c9ab3bc..32f08bd 100644
--- a/src/rebar_utils.erl
+++ b/src/rebar_utils.erl
@@ -205,6 +205,6 @@ emulate_escript_foldl(Fun, Acc, File) ->
                 {archive, ArchiveBin} ->
                     zip:foldl(Fun, Acc, {File, ArchiveBin})
             end;
-        {error, Reason} ->
-            {error, Reason}
+        {error, _} = Error ->
+            Error
     end.