add guard for local development

Gemfile

@@ -4,13 +4,18 @@ source 'https://rubygems.org'
 
 gemspec
 
+gem 'cocoapods', '~> 1.5.3'
+
 group :development do
   gem 'bacon', '~> 1.2.0'
-  gem 'cocoapods', '~> 1.5.3'
+  gem 'guard'
+  gem 'guard-bundler'
+  gem 'guard-rake'
+  gem 'guard-rubocop'
   gem 'mocha', '~> 1.6.0'
   gem 'mocha-on-bacon', '~> 0.2.3'
   gem 'prettybacon', '~> 0.0.2'
   gem 'rubocop', '~> 0.58.2'
   gem 'rubocop-require_tools'
+  gem 'terminal-notifier-guard', '~> 1.6.1'
 end
-

Gemfile.lock

@@ -50,16 +50,45 @@ GEM
       nap (>= 0.8, < 2.0)
       netrc (~> 0.11)
     cocoapods-try (1.1.0)
+    coderay (1.1.2)
     colored2 (3.1.2)
     concurrent-ruby (1.0.5)
     escape (0.0.4)
+    ffi (1.9.25)
+    formatador (0.2.5)
     fourflusher (2.0.1)
     fuzzy_match (2.0.4)
     gh_inspector (1.1.3)
+    guard (2.14.2)
+      formatador (>= 0.2.4)
+      listen (>= 2.7, < 4.0)
+      lumberjack (>= 1.0.12, < 2.0)
+      nenv (~> 0.1)
+      notiffany (~> 0.0)
+      pry (>= 0.9.12)
+      shellany (~> 0.0)
+      thor (>= 0.18.1)
+    guard-bundler (2.1.0)
+      bundler (~> 1.0)
+      guard (~> 2.2)
+      guard-compat (~> 1.1)
+    guard-compat (1.2.1)
+    guard-rake (1.0.0)
+      guard
+      rake
+    guard-rubocop (1.3.0)
+      guard (~> 2.0)
+      rubocop (~> 0.20)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     jaro_winkler (1.5.1)
+    listen (3.1.5)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+      ruby_dep (~> 1.2)
+    lumberjack (1.0.13)
     metaclass (0.0.4)
+    method_source (0.9.0)
     minitest (5.11.3)
     mocha (1.6.0)
       metaclass (~> 0.0.1)
@@ -68,15 +97,25 @@ GEM
     molinillo (0.6.5)
     nanaimo (0.2.6)
     nap (1.1.0)
+    nenv (0.3.0)
     netrc (0.11.0)
+    notiffany (0.1.1)
+      nenv (~> 0.1)
+      shellany (~> 0.0)
     parallel (1.12.1)
     parser (2.5.1.2)
       ast (~> 2.4.0)
     powerpack (0.1.2)
     prettybacon (0.0.2)
       bacon (~> 1.2)
+    pry (0.11.3)
+      coderay (~> 1.1.0)
+      method_source (~> 0.9.0)
     rainbow (3.0.0)
     rake (12.3.1)
+    rb-fsevent (0.10.3)
+    rb-inotify (0.9.10)
+      ffi (>= 0.5.0, < 2)
     rubocop (0.58.2)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
@@ -89,6 +128,10 @@ GEM
       rubocop (>= 0.49.1)
     ruby-macho (1.2.0)
     ruby-progressbar (1.9.0)
+    ruby_dep (1.5.0)
+    shellany (0.0.1)
+    terminal-notifier-guard (1.6.4)
+    thor (0.20.0)
     thread_safe (0.3.6)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
@@ -108,12 +151,17 @@ DEPENDENCIES
   bundler (~> 1.3)
   cocoapods (~> 1.5.3)
   cocoapods-playgrounds!
+  guard
+  guard-bundler
+  guard-rake
+  guard-rubocop
   mocha (~> 1.6.0)
   mocha-on-bacon (~> 0.2.3)
   prettybacon (~> 0.0.2)
   rake
   rubocop (~> 0.58.2)
   rubocop-require_tools
+  terminal-notifier-guard (~> 1.6.1)
 
 BUNDLED WITH
    1.16.3

Guardfile

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+guard :bundler do
+  require 'guard/bundler'
+  require 'guard/bundler/verify'
+  helper = Guard::Bundler::Verify.new
+
+  files = ['Gemfile']
+  files += Dir['*.gemspec'] if files.any? { |f| helper.uses_gemspec?(f) }
+
+  # Assume files are symlinked from somewhere
+  files.each { |file| watch(helper.real_path(file)) }
+end
+
+guard :rubocop do
+  watch(/.+\.rb$/)
+  watch(%r{(?:.+/)?\.rubocop(?:_todo)?\.yml$}) { |m| File.dirname(m[0]) }
+end
+
+if `uname`.match?(/Darwin/)
+  notification :terminal_notifier,
+               app_name: 'cocoapods-playgrounds',
+               activate: 'com.googlecode.iTerm2'
+end