Add elvis target

Makefile

@@ -1,5 +1,6 @@
 CACHEGRIND=qcachegrind
-REBAR=./rebar3
+ELVIS=./bin/elvis
+REBAR=./bin/rebar3
 
 all: compile
 
@@ -19,6 +20,10 @@ edoc:
 	@echo "Running rebar3 edoc..."
 	@$(REBAR) edoc
 
+elvis:
+	@echo "Running elvis rock..."
+	@$(ELVIS) rock
+
 eunit:
 	@echo "Running rebar3 eunit..."
 	@$(REBAR) do eunit -cv, cover -v
@@ -33,10 +38,10 @@ profile:
 	@_build/test/lib/fprofx/erlgrindx -p fprofx.analysis
 	@$(CACHEGRIND) fprofx.cgrind
 
-test: compile dialyzer eunit xref
+test: compile dialyzer elvis eunit xref
 
 xref:
 	@echo "Running rebar3 xref..."
 	@$(REBAR) xref
 
-.PHONY: clean compile dialyzer edoc eunit profile xref
+.PHONY: clean compile dialyzer edoc elvis eunit profile xref

elvis.config

@@ -0,0 +1,35 @@
+[{elvis, [
+  {config, [
+    #{dirs => ["src", "test"],
+      filter => "*.erl",
+      rules => [
+        {elvis_style, dont_repeat_yourself, #{min_complexity => 10}},
+        {elvis_style, god_modules, #{limit => 25}},
+        {elvis_style, invalid_dynamic_call, #{ignore => []}},
+        {elvis_style, line_length, #{limit => 80, skip_comments => false}},
+        {elvis_style, macro_module_names},
+        {elvis_style, macro_names},
+        {elvis_style, module_naming_convention, #{regex => "^([a-z][a-z0-9]*_?)*(_SUITE)?$", ignore => []}},
+        {elvis_style, nesting_level, #{level => 3}},
+        {elvis_style, no_behavior_info},
+        {elvis_style, no_if_expression},
+        {elvis_style, no_spec_with_records},
+        {elvis_style, no_tabs},
+        {elvis_style, no_trailing_whitespace},
+        {elvis_style, operator_spaces, #{rules => [{right, ","}, {right, "++"}, {left, "++"}]}},
+        {elvis_style, state_record_and_type},
+        {elvis_style, used_ignored_variable}
+      ]},
+    #{dirs => ["."],
+      filter => "rebar.config",
+      rules => [
+        {elvis_project, no_deps_master_rebar, #{ignore => []}},
+        {elvis_project, protocol_for_deps_rebar, #{ignore => []}}
+      ]},
+    #{dirs => ["."],
+      filter => "elvis.config",
+      rules => [
+        {elvis_project, old_configuration_format}
+      ]}
+  ]}
+]}].

test/statsderl_profile.erl

@@ -16,15 +16,17 @@ fprofx() ->
     lists:foreach(fun code:load_abs/1, Rootnames),
 
     application:start(statsderl),
-    [statsderl:increment(["test", <<".test">>], 1, 0.25) || _ <- lists:seq(1, ?N)],
+    [statsderl:increment(["test", <<".test">>], 1, 0.25) ||
+        _ <- lists:seq(1, ?N)],
 
     fprofx:start(),
     {ok, Tracer} = fprofx:profile(start),
     fprofx:trace([start, {procs, new}, {tracer, Tracer}]),
 
     Self = self(),
     [spawn(fun () ->
-        [statsderl:increment(["test", <<".test">>], 1, 0.25) || _ <- lists:seq(1, ?N)],
+        [statsderl:increment(["test", <<".test">>], 1, 0.25) ||
+            _ <- lists:seq(1, ?N)],
         Self ! exit
     end) || _ <- lists:seq(1, ?P)],
     wait(),

test/statsderl_tests.erl

@@ -67,7 +67,9 @@ sampling_rate_subtest(Socket) ->
     meck:expect(statsderl_utils, random, fun (?MAX_UNSIGNED_INT_32) -> 0 end),
     statsderl:counter("test", 1, 0.1234),
     assert_packet(Socket, <<"test:1|c|@0.123">>),
-    meck:expect(statsderl_utils, random, fun (?MAX_UNSIGNED_INT_32) -> ?MAX_UNSIGNED_INT_32 end),
+    meck:expect(statsderl_utils, random, fun (?MAX_UNSIGNED_INT_32) ->
+        ?MAX_UNSIGNED_INT_32
+    end),
     statsderl:counter("test", 1, 0.1234),
     meck:unload(statsderl_utils).