Fixed notification option

Only print notification "Install message" once
Added GUARD_NOTIFY=false env variable support
Fixes #28

README.markdown

@@ -91,6 +91,8 @@ Notifications (growl/libnotify) can be disabled with:
     $ guard --notify false
     $ guard -n false # shortcut
 
+Notifications can also be disabled by setting a `GUARD_NOTIFY` environment variable to `false`
+
 The guards to start can be specified by group (see the Guardfile DSL below) specifying the <tt>--group</tt> (or <tt>-g</tt>) option:
 
     $ guard --group group_name another_group_name

lib/guard.rb

@@ -16,7 +16,8 @@ module Guard
       @listener = Listener.select_and_init
       @guards   = []
 
-      Notifier.turn_off unless options[:notify]
+      options[:notify] = false if ENV["GUARD_NOTIFY"] == 'false'
+      options[:notify] ? Notifier.turn_on : Notifier.turn_off
 
       self
     end

lib/guard/notifier.rb

@@ -9,24 +9,30 @@ module Guard
     end
 
     def self.turn_on
-      @disable = nil
+      @disable = false
+      case Config::CONFIG['target_os']
+      when /darwin/i
+        require_growl
+      when /linux/i
+        require_libnotify
+      end
     end
 
     def self.notify(message, options = {})
-      unless @disable || ENV["GUARD_ENV"] == "test"
+      unless @disable
         image = options[:image] || :success
         title = options[:title] || "Guard"
         case Config::CONFIG['target_os']
         when /darwin/i
-          if growl_installed?
           Growl.notify message, :title => title, :icon => image_path(image), :name => "Guard"
-          end
         when /linux/i
-          if libnotify_installed?
           Libnotify.show :body => message, :summary => title, :icon_path => image_path(image)
         end
       end
     end
+
+    def self.disabled?
+      @disable
     end
 
   private
@@ -46,24 +52,18 @@ module Guard
       end
     end
 
-    def self.growl_installed?
+    def self.require_growl
-      @installed ||= begin
       require 'growl'
-        true
     rescue LoadError
+      @disable = true
       UI.info "Please install growl gem for Mac OS X notification support and add it to your Gemfile"
-        false
-      end
     end
 
-    def self.libnotify_installed?
+    def self.require_libnotify
-      @installed ||= begin
       require 'libnotify'
-        true
     rescue LoadError
+      @disable = true
       UI.info "Please install libnotify gem for Linux notification support and add it to your Gemfile"
-        false
-      end
     end
 
   end

spec/guard/notifier_spec.rb

@@ -4,13 +4,10 @@ describe Guard::Notifier do
   subject { Guard::Notifier }
 
   describe ".notify" do
-    before(:each) do
+    before(:each) { subject.turn_on }
-      @saved_guard_env = ENV["GUARD_ENV"]
-      ENV["GUARD_ENV"] = 'dont_mute_notify'
-      subject.turn_on
-    end
 
-    if mac? && Guard::Notifier.growl_installed?
+    if mac?
+      if growl_installed?
         it "uses Growl on Mac OS X" do
           Growl.should_receive(:notify).with("great",
             :title => "Guard",
@@ -19,9 +16,13 @@ describe Guard::Notifier do
           )
           subject.notify 'great', :title => 'Guard'
         end
+      else
+        it { should be_disabled }
+      end
     end
 
-    if linux? && Guard::Notifier.libnotify_installed?
+    if linux?
+      if libnotify_installed?
         it "uses Libnotify on Linux" do
           Libnotify.should_receive(:show).with(
             :body      => "great",
@@ -30,27 +31,28 @@ describe Guard::Notifier do
           )
           subject.notify 'great', :title => 'Guard'
         end
+      else
+        it { should be_disabled }
+      end
+    end
   end
 
   describe ".turn_off" do
-      before(:each) { subject.turn_off }
+    if mac? && growl_installed?
-
-      if mac? && Guard::Notifier.growl_installed?
       it "does nothing" do
         Growl.should_not_receive(:notify)
         subject.notify 'great', :title => 'Guard'
       end
     end
 
-      if linux? && Guard::Notifier.libnotify_installed?
+    if linux? && libnotify_installed?
       it "does nothing" do
         Libnotify.should_not_receive(:show)
         subject.notify 'great', :title => 'Guard'
       end
     end
-    end
 
-    after(:each) { ENV["GUARD_ENV"] = @saved_guard_env }
+    it { should be_disabled }
   end
 
 end

spec/guard_spec.rb

@@ -23,10 +23,22 @@ describe Guard do
         ::Guard.listener.should be_kind_of(Guard::Listener)
       end
 
+      it "should turn on by default" do
+        ::Guard::Notifier.should_receive(:turn_on)
+        ::Guard.setup(:notify => true)
+      end
+
       it "should turn off notifier if notify option is false" do
         ::Guard::Notifier.should_receive(:turn_off)
         ::Guard.setup(:notify => false)
       end
+
+      it "should turn off notifier if env[GUARD_NOTIFY] is false" do
+        ::Guard::Notifier.should_receive(:turn_off)
+        ENV["GUARD_NOTIFY"] = 'false'
+        ::Guard.setup(:notify => true)
+        ENV["GUARD_NOTIFY"] = nil
+      end
     end
 
     describe ".get_guard_class" do

spec/spec_helper.rb

@@ -15,6 +15,7 @@ RSpec.configure do |config|
   config.run_all_when_everything_filtered = true
 
   config.before(:each) do
+    Guard::Notifier.turn_off
     @fixture_path = Pathname.new(File.expand_path('../fixtures/', __FILE__))
   end
 

spec/support/gems_helper.rb

@@ -0,0 +1,13 @@
+def growl_installed?
+  require 'growl'
+  true
+rescue LoadError
+  false
+end
+
+def libnotify_installed?
+  require 'libnotify'
+  true
+rescue LoadError
+  false
+end