Require reek with version 3.0.0 or later

Close metricfu#272

Gemfile

@@ -4,8 +4,6 @@ source "https://rubygems.org"
 if RUBY_VERSION == "1.9.2"
   # because of https://github.com/railsbp/rails_best_practices/blob/master/rails_best_practices.gemspec
   gem "activesupport", "~> 3.2"
-  # because of https://github.com/troessner/reek/issues/334
-  gem "reek", "~> 1.4.0"
   # rbp -> as -> i18n
   gem 'i18n', '0.6.11'
   gem "parallel", "= 1.3.3" # 1.3.4 disallows 1.9.2

lib/metric_fu/metrics/reek/generator.rb

@@ -14,12 +14,12 @@ def emit
       end
     end
 
-    def run!(files, config_files)
-      examiner.new(files, config_files)
+    def run!(files, _config_files)
+      files.map { |file| examiner.new(Pathname.new(file), []) }
     end
 
     def analyze
-      @matches = @output.smells.group_by(&:source).collect do |file_path, smells|
+      @matches = @output.map(&:smells).flatten.group_by(&:source).collect do |file_path, smells|
         { file_path: file_path,
           code_smells: analyze_smells(smells) }
       end

metric_fu.gemspec

@@ -45,7 +45,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency "flay",                  [">= 2.0.1",  "~> 2.1"]
   s.add_runtime_dependency "churn",                 ["~> 0.0.35"]
   s.add_runtime_dependency "flog",                  [">= 4.1.1",  "~> 4.1"]
-  s.add_runtime_dependency "reek",                  [">= 1.3.4",  "< 3.0"]
+  s.add_runtime_dependency "reek",                  [">= 3.0.0"]
   s.add_runtime_dependency "cane",                  [">= 2.5.2",  "~> 2.5"]
   s.add_runtime_dependency "rails_best_practices",  [">= 1.14.3", "~> 1.14"]
   s.add_runtime_dependency "metric_fu-Saikuro",     [">= 1.1.3",  "~> 1.1"]

spec/metric_fu/metrics/reek/generator_spec.rb

@@ -100,7 +100,8 @@
                             lines: [6, 9])
         ]
         @lines = instance_double(@examiner, smells: @smells)
-        @reek.instance_variable_set(:@output, @lines)
+        @output = [@lines]
+        @reek.instance_variable_set(:@output, @output)
         @matches = @reek.analyze
       end
 
@@ -144,7 +145,8 @@
                    lines: [2, 4]),
         ]
         @lines = instance_double(@examiner, smells: @smells)
-        @reek.instance_variable_set(:@output, @lines)
+        @output = [@lines]
+        @reek.instance_variable_set(:@output, @output)
         @matches = @reek.analyze
       end
 
@@ -157,7 +159,8 @@
     context "without reek warnings" do
       before :each do
         @lines = instance_double(@examiner, smells: [])
-        @reek.instance_variable_set(:@output, @lines)
+        @output = [@lines]
+        @reek.instance_variable_set(:@output, @output)
         @matches = @reek.analyze
       end