add guard, configure simplecov for ci

.travis.yml

@@ -4,3 +4,4 @@ rvm:
 script:
   - bundle exec travis lint --skip-completion-check
   - bundle exec rspec
+  - bundle exec rubocop -D

Gemfile

@@ -4,10 +4,12 @@ source 'https://rubygems.org'
 gemspec
 
 group :development, :test do
-  gem 'simplecov'
   gem 'coveralls'
+  gem 'guard-rspec'
+  gem 'guard-rubocop'
   gem 'rake'
-  gem 'travis'
-  gem 'rubocop'
   gem 'rspec'
+  gem 'rubocop'
+  gem 'simplecov'
+  gem 'travis'
 end

Guardfile

@@ -0,0 +1,22 @@
+group :everything, halt_on_fail: true do
+  guard :rspec, cmd: 'bundle exec rspec' do
+    require 'guard/rspec/dsl'
+    dsl = Guard::RSpec::Dsl.new(self)
+
+    rspec = dsl.rspec
+    watch(rspec.spec_helper) { rspec.spec_dir }
+    watch(rspec.spec_support) { rspec.spec_dir }
+    watch(rspec.spec_files)
+
+    # Ruby files
+    ruby = dsl.ruby
+    dsl.watch_spec_files_for(ruby.lib_files)
+  end
+
+  guard :rubocop, cli: %w(-D) do
+    watch(/.+\.rb$/)
+    watch(/Guardfile/)
+    watch(/Rakefile/)
+    watch(/(?:.+\/)?\.rubocop\.yml$/) { |m| File.dirname(m[0]) }
+  end
+end

spec/spec_helper.rb

@@ -1,9 +1,11 @@
 require 'simplecov'
-require 'coveralls'
-SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
-  SimpleCov::Formatter::HTMLFormatter,
-  Coveralls::SimpleCov::Formatter
-]
+if ENV['CI']
+  require 'coveralls'
+  SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
+    SimpleCov::Formatter::HTMLFormatter,
+    Coveralls::SimpleCov::Formatter
+  ]
+end
 SimpleCov.start { add_filter '/spec/' }
 
 require_relative '../lib/stink_bomb'