Don’t create a target if its definition, in the Podfile, is empty (no dependencies). Closes #79.

lib/cocoapods/installer.rb

@@ -18,7 +18,7 @@ module Pod
       include Config::Mixin
       include Shared
 
-      attr_reader :target
+      attr_reader :podfile, :project, :definition, :target
 
       def initialize(podfile, project, definition)
         @podfile, @project, @definition = podfile, project, definition
@@ -163,8 +163,8 @@ module Pod
 
     def target_installers
       @target_installers ||= @podfile.target_definitions.values.map do |definition|
-        TargetInstaller.new(@podfile, project, definition)
-      end
+        TargetInstaller.new(@podfile, project, definition) unless definition.empty?
+      end.compact
     end
 
     def install!

lib/cocoapods/podfile.rb

@@ -8,7 +8,13 @@ module Pod
       end
 
       def lib_name
-        name == :default ? "Pods" : "Pods-#{name}"
+        if name == :default
+          "Pods"
+        elsif @parent
+          "#{@parent.lib_name}-#{name}"
+        else
+          "Pods-#{name}"
+        end
       end
 
       # Returns *all* dependencies of this target, not only the target specific
@@ -16,6 +22,10 @@ module Pod
       def dependencies
         @target_dependencies + (@parent ? @parent.dependencies : [])
       end
+
+      def empty?
+        target_dependencies.empty?
+      end
     end
 
     def self.from_file(path)

spec/unit/installer_spec.rb

@@ -3,7 +3,10 @@ require File.expand_path('../../spec_helper', __FILE__)
 describe "Pod::Installer" do
   describe ", by default," do
     before do
-      @xcconfig = Pod::Installer.new(Pod::Podfile.new { platform :ios }).target_installers.first.xcconfig.to_hash
+      @xcconfig = Pod::Installer.new(Pod::Podfile.new do
+        platform :ios
+        dependency 'JSONKit'
+      end).target_installers.first.xcconfig.to_hash
     end
 
     it "sets the header search paths where installed Pod headers can be found" do
@@ -45,6 +48,17 @@ describe "Pod::Installer" do
     installer.target_installers.first.bridge_support_generator.headers.should == expected
   end
 
+  it "omits empty target definitions" do
+    podfile = Pod::Podfile.new do
+      platform :ios
+      target :not_empty do
+        dependency 'JSONKit'
+      end
+    end
+    installer = Pod::Installer.new(podfile)
+    installer.target_installers.map(&:definition).map(&:name).should == [:not_empty]
+  end
+
   it "moves the compile and link phases to the end of the build phases list, so Pod headers are copied first and sources can use the same header dir structure" do
     podfile = Pod::Podfile.new do
       platform :osx

spec/unit/podfile_spec.rb

@@ -60,6 +60,14 @@ describe "Pod::Podfile" do
   end
 
   describe "concerning targets (dependency groups)" do
+    it "returns wether or not a target has any dependencies" do
+      Pod::Podfile.new do
+      end.target_definitions[:default].should.be.empty
+      Pod::Podfile.new do
+        dependency 'JSONKit'
+      end.target_definitions[:default].should.not.be.empty
+    end
+
     before do
       @podfile = Pod::Podfile.new do
         target :debug do
@@ -68,6 +76,9 @@ describe "Pod::Podfile" do
 
         target :test, :exclusive => true do
           dependency 'JSONKit'
+          target :subtarget do
+            dependency 'Reachability'
+          end
         end
 
         dependency 'ASIHTTPRequest'
@@ -75,7 +86,7 @@ describe "Pod::Podfile" do
     end
 
     it "returns all dependencies of all targets combined, which is used during resolving to enusre compatible dependencies" do
-      @podfile.dependencies.map(&:name).sort.should == %w{ ASIHTTPRequest JSONKit SSZipArchive }
+      @podfile.dependencies.map(&:name).sort.should == %w{ ASIHTTPRequest JSONKit Reachability SSZipArchive }
     end
 
     it "adds dependencies outside of any explicit target block to the default target" do
@@ -98,6 +109,12 @@ describe "Pod::Podfile" do
       target.lib_name.should == 'Pods-test'
       target.dependencies.should == [Pod::Dependency.new('JSONKit')]
     end
+
+    it "adds dependencies of the outer target to nested targets" do
+      target = @podfile.target_definitions[:subtarget]
+      target.lib_name.should == 'Pods-test-subtarget'
+      target.dependencies.should == [Pod::Dependency.new('Reachability'), Pod::Dependency.new('JSONKit')]
+    end
   end
 
   describe "concerning validations" do