Changes based on feedback and add more tasks to rakefile

Rakefile

@@ -16,6 +16,21 @@ task :rubocop do
   system('rubocop --display-cop-names')
 end
 
+desc "Run generator for specefic exercise"
+task :generate, [:exercise] do |_t, argumments|
+  system("./bin/generate --exercise #{argumments[:exercise]}")
+end
+
+desc "Run generator for all exercises"
+task :generate_all do
+  system("./bin/generate --all")
+end
+
+desc "Verify templates for all exercises"
+task :verify do
+  system("./bin/generate --verify")
+end
+
 namespace :test do
   flags = ARGV.drop_while { |e| e != '--' }.drop(1).join(' ')
 

bin/generate

@@ -10,9 +10,9 @@ def exercises
 end
 
 class VerificationError < StandardError
-  def initialize(
-    message = "VerificationError: The result generated for %<exercise>s, doesn't match the current file"
-  )
+  MESSAGE = 'The result generated for %<exercise>s, does not match the current file'
+
+  def initialize(message = MESSAGE)
     super
   end
 end
@@ -47,7 +47,7 @@ parser.on('--verify', 'Verify all exercises') do
       fail VerificationError unless current_code == generated_code
     end
     rescue VerificationError => e
-      $stderr.puts e.message % {exercise:}
+      stderr.puts e.message % {exercise:}
   end
 end
 

generatorv2/lib/generator.rb

@@ -8,6 +8,7 @@
 
 class Generator
   include Utils
+  include NullDevice
 
   def initialize(exercise = nil)
     @first = true
@@ -20,15 +21,13 @@ def generate(result_path = "./exercises/practice/#{@exercise}/#{@exercise}_test.
     additional_json(json)
     json["cases"] = remove_tests(uuid, json)
     status = proc { status }
-    camel_case = proc { |str| camel_case(str) }
-    underscore = proc { |str| underscore(str) }
     template = ERB.new File.read("./exercises/practice/#{@exercise}/.meta/test_template.erb")
 
     result = template.result(binding)
 
     File.write(result_path, result)
-    cli = RuboCop::CLI.new
-    cli.run(['-x', "-c", ".rubocop.yml", "-o", "/dev/null", result_path])
+    RuboCop::CLI.new.
+      run(['-x', '-c', '.rubocop.yml', '-o', NullDevice.path, result_path])
   end
 
   def underscore(str)

generatorv2/lib/utils.rb

@@ -1,3 +1,9 @@
+module NullDevice
+  def self.path
+    Gem.win_platform? ? 'NUL' : '/dev/null'
+  end
+end
+
 module Utils
   def toml(path = "./exercises/practice/#{@exercise}/.meta/tests.toml")
     raise "Toml not found: #{path}" unless File.exist?(path)