Added init feature

Gemfile.lock

@@ -2,11 +2,12 @@ PATH
   remote: .
   specs:
     guard (0.1.0.beta.1)
+      bundler (~> 1.0.2)
       growl (~> 1.0.3)
       libnotify (~> 0.1.3)
       rb-inotify (~> 0.8.1)
       sys-uname (~> 0.8.4)
-      thor (~> 0.14.2)
+      thor (~> 0.14.3)
 
 GEM
   remote: http://rubygems.org/
@@ -15,6 +16,9 @@ GEM
     ffi (0.6.3)
       rake (>= 0.8.7)
     growl (1.0.3)
+    guard-rspec (0.1.0.beta.2)
+      guard (~> 0.1.0.beta.1)
+      rspec (~> 2.0.0.rc)
     libnotify (0.1.4)
       ffi (>= 0.6.2)
     rake (0.8.7)
@@ -40,8 +44,9 @@ DEPENDENCIES
   bundler (~> 1.0.2)
   growl (~> 1.0.3)
   guard!
+  guard-rspec (~> 0.1.0.beta.2)
   libnotify (~> 0.1.3)
   rb-inotify (~> 0.8.1)
   rspec (~> 2.0.0.rc)
   sys-uname (~> 0.8.4)
-  thor (~> 0.14.2)
+  thor (~> 0.14.3)

guard.gemspec

@@ -15,10 +15,11 @@ Gem::Specification.new do |s|
   s.required_rubygems_version = '>= 1.3.6'
   s.rubyforge_project = 'guard'
   
-  s.add_development_dependency  'bundler', '~> 1.0.2'
   s.add_development_dependency  'rspec',       '~> 2.0.0.rc'
+  s.add_development_dependency  'guard-rspec', '~> 0.1.0.beta.2'
   
-  s.add_dependency 'thor',       '~> 0.14.2'
+  s.add_dependency 'bundler',    '~> 1.0.2'
+  s.add_dependency 'thor',       '~> 0.14.3'
   s.add_dependency 'sys-uname',  '~> 0.8.4'
   # Mac OS X
   s.add_dependency 'growl',      '~> 1.0.3'

lib/guard.rb

@@ -1,3 +1,5 @@
+require 'bundler'
+
 module Guard
   
   autoload :UI,         'guard/ui'
@@ -16,6 +18,9 @@ module Guard
       @guards   = []
       
       Dsl.evaluate_guardfile
+      if guards.empty?
+        UI.error "No guards found in Guardfile, too bad."
+      else
         Interactor.init_signal_traps
         
         listener.on_change do |files|
@@ -31,11 +36,24 @@ module Guard
         guards.each(&:start)
         listener.start
       end
+    end
     
     def add_guard(name, watchers = [], options = {})
+      guard_class = get_guard_class(name)
+      @guards << guard_class.new(watchers, options)
+    end
+    
+    def get_guard_class(name)
       require "guard/#{name.downcase}"
       guard_class = ObjectSpace.each_object(Class).detect { |c| c.to_s.downcase.match "^guard::#{name.downcase}" }
-      @guards << guard_class.new(watchers, options)
+    rescue LoadError
+      UI.error "#{name} guard gem not found, try to add it to your Gemfile."
+    end
+    
+    def locate_guard(name)
+      spec = Bundler.load.specs.find{|s| s.name == "guard-#{name}" }
+      UI.error "Could not find gem '#{name}' in the current Gemfile." unless spec
+      spec.full_gem_path
     end
     
     def run
@@ -45,5 +63,4 @@ module Guard
     end
     
   end
-  
 end

lib/guard/cli.rb

@@ -16,5 +16,22 @@ module Guard
       Guard::UI.info "Guard version #{Guard::VERSION}"
     end
     map %w(-v --version) => :version
+    
+    desc "init [GUARD]", "Generates a Guardfile into the current working directory, or add it given guard"
+    def init(guard_name = nil)
+      if !File.exist?("Guardfile")
+        puts "Writing new Guardfile to #{Dir.pwd}/Guardfile"
+        FileUtils.cp(File.expand_path('../templates/Guardfile', __FILE__), 'Guardfile')
+      elsif guard_name.nil?
+        Guard::UI.error "Guardfile already exists at #{Dir.pwd}/Guardfile"
+        exit 1
+      end
+      
+      if guard_name
+        guard_class = Guard.get_guard_class(guard_name)
+        guard_class.init(guard_name)
+      end
+    end
+    
   end
 end

lib/guard/dsl.rb

@@ -10,14 +10,18 @@ module Guard
       exit 1
     end
     
+    def self.guardfile_included?(guard_name)
+      File.read('Guardfile').include?("guard '#{guard_name}'")
+    end
+    
     def guard(name, options = {}, &definition)
       @watchers = []
-      definition.call
+      definition.call if definition
-      Guard.add_guard(name, @watchers, options)
+      ::Guard.add_guard(name, @watchers, options)
     end
     
     def watch(pattern, &action)
-      @watchers << Guard::Watcher.new(pattern, action)
+      @watchers << ::Guard::Watcher.new(pattern, action)
     end
     
   end

lib/guard/guard.rb

@@ -6,6 +6,22 @@ module Guard
       @watchers, @options = watchers, options
     end
     
+    # Guardfile template needed inside guard gem
+    def self.init(name)
+      if ::Guard::Dsl.guardfile_included?(name)
+        ::Guard::UI.info "Guardfile already include #{name} guard"
+      else
+        content = File.read('Guardfile')
+        guard   = File.read("#{::Guard.locate_guard(name)}/lib/guard/#{name}/templates/Guardfile")
+        File.open('Guardfile', 'wb') do |f|
+          f.puts content
+          f.puts ""
+          f.puts guard
+        end
+        ::Guard::UI.info "#{name} guard added to Guardfile, feel free to edit it"
+      end
+    end
+    
     # ================
     # = Guard method =
     # ================

lib/guard/templates/Guardfile

@@ -0,0 +1,2 @@
+# A sample Guardfile
+# More info at http://github.com/guard/guard#readme

lib/guard/ui.rb

@@ -5,7 +5,7 @@ module Guard
       def info(message, options = {})
         unless ENV["GUARD_ENV"] == "test"
           reset_line if options[:reset]
-          clear      if options.key?(:clear) ? options[:clear] : ::Guard.options[:clear]
+          clear      if options.key?(:clear) ? options[:clear] : (::Guard.options && ::Guard.options[:clear])
           puts reset_color(message) if message != ''
         end
       end