Move the DSL describing logic from the CLI to the DSLDescriber.

lib/guard/cli.rb

@@ -50,7 +50,7 @@ module Guard
                   :type => :boolean,
                   :default => false,
                   :aliases => '-A',
-                  :banner => "Watch for all file modifications including moves and deletions"
+                  :banner => 'Watch for all file modifications including moves and deletions'
 
     # Start Guard by initialize the defined Guards and watch the file system.
     # This is the default task, so calling `guard` is the same as calling `guard start`.
@@ -66,37 +66,8 @@ module Guard
     # List the Guards that are available for use in your system and marks
     # those that are currently used in your `Guardfile`.
     #
-    # @example Guard list output
-    #
-    #   Available guards:
-    #     bundler *
-    #     livereload
-    #     ronn
-    #     rspec *
-    #     spork
-    #
-    #   See also https://github.com/guard/guard/wiki/List-of-available-Guards
-    #   * denotes ones already in your Guardfile
-    #
-    # @see Guard::DslDescriber
-    #
     def list
-      Guard::DslDescriber.evaluate_guardfile(options)
-
-      installed = Guard::DslDescriber.guardfile_structure.inject([]) do |installed, group|
-        group[:guards].each { |guard| installed << guard[:name] } if group[:guards]
-        installed
-      end
-
-      Guard::UI.info 'Available guards:'
-
-      Guard::guard_gem_names.sort.uniq.each do |name|
-        Guard::UI.info "   #{ name } #{ installed.include?(name) ? '*' : '' }"
-      end
-
-      Guard::UI.info ' '
-      Guard::UI.info 'See also https://github.com/guard/guard/wiki/List-of-available-Guards'
-      Guard::UI.info '* denotes ones already in your Guardfile'
+      Guard::DslDescriber.list(options)
     end
 
     desc 'version', 'Show the Guard version'
@@ -138,40 +109,8 @@ module Guard
     # Shows all Guards and their options that are defined in
     # the `Guardfile`.
     #
-    # @example guard show output
-    #
-    #   (global):
-    #     bundler
-    #     coffeescript: input => "app/assets/javascripts", noop => true
-    #     jasmine
-    #     rspec: cli => "--fail-fast --format Fuubar
-    #
-    # @see Guard::DslDescriber
-    #
     def show
-      Guard::DslDescriber.evaluate_guardfile(options)
-
-      Guard::DslDescriber.guardfile_structure.each do |group|
-        unless group[:guards].empty?
-          if group[:group]
-            Guard::UI.info "Group #{ group[:group] }:"
-          else
-            Guard::UI.info '(global):'
-          end
-
-          group[:guards].each do |guard|
-            line = "  #{ guard[:name] }"
-
-            unless guard[:options].empty?
-              line += ": #{ guard[:options].collect { |k, v| "#{ k } => #{ v.inspect }" }.join(', ') }"
-            end
-
-            Guard::UI.info line
-          end
-        end
-      end
-
-      Guard::UI.info ''
+      Guard::DslDescriber.show(options)
     end
 
   end

lib/guard/dsl_describer.rb

@@ -2,6 +2,8 @@ require 'guard/dsl'
 
 module Guard
 
+  autoload :UI,    'guard/ui'
+
   # The DslDescriber overrides methods to create an internal structure
   # of the Guardfile that is used in some inspection utility methods
   # like the CLI commands `show` and `list`.
@@ -11,10 +13,97 @@ module Guard
   #
   class DslDescriber < Dsl
 
-    @@guardfile_structure = [ { :guards => [] } ]
-
     class << self
 
+      # Evaluate the DSL methods in the `Guardfile`.
+      #
+      # @option options [Array<Symbol,String>] groups the groups to evaluate
+      # @option options [String] guardfile the path to a valid Guardfile
+      # @option options [String] guardfile_contents a string representing the content of a valid Guardfile
+      # @raise [ArgumentError] when options are not a Hash
+      #
+      def evaluate_guardfile(options = {})
+        @@guardfile_structure = [{ :guards => [] }]
+        super options
+      end
+
+      # List the Guards that are available for use in your system and marks
+      # those that are currently used in your `Guardfile`.
+      #
+      # @example Guard list output
+      #
+      #   Available guards:
+      #     bundler *
+      #     livereload
+      #     ronn
+      #     rspec *
+      #     spork
+      #
+      #   See also https://github.com/guard/guard/wiki/List-of-available-Guards
+      #   * denotes ones already in your Guardfile
+      #
+      # @param [Hash] options the Guard options
+      #
+      def list(options)
+        evaluate_guardfile(options)
+
+        installed = guardfile_structure.inject([]) do |installed, group|
+          group[:guards].each { |guard| installed << guard[:name] } if group[:guards]
+          installed
+        end
+
+        UI.info 'Available guards:'
+
+        ::Guard.guard_gem_names.sort.uniq.each do |name|
+          UI.info "   #{ name }#{ installed.include?(name) ? '*' : '' }"
+        end
+
+        UI.info ''
+        UI.info 'See also https://github.com/guard/guard/wiki/List-of-available-Guards'
+        UI.info '* denotes ones already in your Guardfile'
+      end
+
+      # Shows all Guards and their options that are defined in
+      # the `Guardfile`.
+      #
+      # @example guard show output
+      #
+      #   (global):
+      #     bundler
+      #     coffeescript: input => "app/assets/javascripts", noop => true
+      #     jasmine
+      #     rspec: cli => "--fail-fast --format Fuubar
+      #
+      # @param [Hash] options the Guard options
+      #
+      def show(options)
+        evaluate_guardfile(options)
+
+        guardfile_structure.each do |group|
+          unless group[:guards].empty?
+            if group[:group]
+              UI.info "Group #{ group[:group] }:"
+            else
+              UI.info '(global):'
+            end
+
+            group[:guards].each do |guard|
+              line = "  #{ guard[:name] }"
+
+              unless guard[:options].empty?
+                line += ": #{ guard[:options].collect { |k, v| "#{ k } => #{ v.inspect }" }.join(', ') }"
+              end
+
+              UI.info line
+            end
+          end
+        end
+
+        UI.info ''
+      end
+
+      private
+
       # Get the Guardfile structure.
       #
       # @return [Array<Hash>] the structure
@@ -22,6 +111,7 @@ module Guard
       def guardfile_structure
         @@guardfile_structure
       end
+
     end
 
     private

spec/guard/dsl_describer_spec.rb

@@ -1,20 +1,17 @@
 require 'spec_helper'
 
 describe Guard::DslDescriber do
-  before(:each) do
-    ::Guard.stub!(:guards).and_return([mock('Guard')])
-    user_config_path = File.expand_path(File.join('~', '.guard.rb'))
-    File.stub(:exist?).with(user_config_path) { false }
-  end
 
-  it 'should evaluate a Guardfile and create the right structure' do
-    mixed_guardfile_string = <<-GUARD
+  let(:describer) { ::Guard::DslDescriber }
+
+  let(:guardfile) do
+    <<-GUARD
       guard 'test', :a => :b do
         watch('c')
       end
 
       group :a do
-  guard 'test' do
+        guard 'test', :x => 1, :y => 2, :z => 3 do
           watch('c')
         end
       end
@@ -25,14 +22,49 @@ group "b" do
         end
       end
     GUARD
+  end
 
-    described_class.evaluate_guardfile(:guardfile_contents => mixed_guardfile_string)
+  before do
+    @output = ''
+    Guard::UI.stub(:info) { |msg| @output << msg + "\n" }
+  end
 
-    described_class.guardfile_structure.should == [
-      { :guards => [ { :name => 'test', :options => { :a => :b } } ] },
-      { :group => :a, :guards => [ { :name => 'test', :options => {} } ] },
-      { :group => :b, :guards => [ { :name => 'another', :options => {} } ] }
-    ]
+  after do
+    Guard::UI.unstub(:info)
+  end
+
+  describe '.list' do
+    it 'lists the available Guards' do
+      Guard.stub(:guard_gem_names).and_return ['test', 'another', 'even', 'more']
+      describer.list(:guardfile_contents => guardfile)
+      @output.should eql <<OUTPUT
+Using inline Guardfile.
+Available guards:
+   another*
+   even
+   more
+   test*
+
+See also https://github.com/guard/guard/wiki/List-of-available-Guards
+* denotes ones already in your Guardfile
+OUTPUT
+    end
+  end
+
+  describe '.show' do
+    it 'shows the Guards and their options' do
+      describer.show(:guardfile_contents => guardfile)
+      @output.should eql <<OUTPUT
+Using inline Guardfile.
+(global):
+  test: a => :b
+Group a:
+  test: x => 1, y => 2, z => 3
+Group b:
+  another
+
+OUTPUT
+    end
   end
 
 end