Add methods to check if a target uses swift

lib/cocoapods/target/aggregate_target.rb

@@ -96,6 +96,12 @@ module Pod
       specs.map { |spec| spec.consumer(platform) }
     end
 
+    # @return [Boolean] Whether the target uses Swift code
+    #
+    def uses_swift?
+      pod_targets.any?(&:uses_swift?)
+    end
+
     #-------------------------------------------------------------------------#
 
     # @!group Support files

lib/cocoapods/target/pod_target.rb

@@ -54,6 +54,14 @@ module Pod
       specs.map { |spec| spec.consumer(platform) }
     end
 
+    # @return [Boolean] Whether the target uses Swift code
+    #
+    def uses_swift?
+      file_accessors.any? do |file_accessor|
+        file_accessor.source_files.any? { |sf| sf.extname == ".swift" }
+      end
+    end
+
     # @return [Specification] The root specification for the target.
     #
     def root_spec

spec/spec_helper.rb

@@ -118,6 +118,15 @@ def fixture_file_accessor(name, platform = :ios)
   Pod::Sandbox::FileAccessor.new(path_list, spec.consumer(platform))
 end
 
+def fixture_pod_target(name, platform = :ios)
+  spec = fixture_spec(name)
+  target_definition = Pod::Podfile::TargetDefinition.new('Pods', nil)
+  Pod::PodTarget.new([spec], target_definition, config.sandbox).tap do |pod_target|
+    pod_target.stubs(:platform).returns(platform)
+    pod_target.file_accessors << fixture_file_accessor(name, platform)
+  end
+end
+
 #-----------------------------------------------------------------------------#
 
 SpecHelper::Fixture.fixture('banana-lib') # ensure it exists

spec/unit/target/aggregate_target_spec.rb

@@ -115,5 +115,31 @@ module Pod
         consumer_reps.should == [['BananaLib', :ios]]
       end
     end
+
+    describe 'Product type dependent helpers' do
+      describe 'With libraries' do
+        before do
+          @pod_target = fixture_pod_target('banana-lib/BananaLib.podspec')
+          @target = AggregateTarget.new(@pod_target.target_definition, config.sandbox)
+          @target.pod_targets = [@pod_target]
+        end
+
+        it 'returns that it does not use swift' do
+          @target.uses_swift?.should == false
+        end
+      end
+
+      describe 'With frameworks' do
+        before do
+          @pod_target = fixture_pod_target('orange-framework/OrangeFramework.podspec')
+          @target = AggregateTarget.new(@pod_target.target_definition, config.sandbox)
+          @target.pod_targets = [@pod_target]
+        end
+
+        it 'returns that it uses swift' do
+          @target.uses_swift?.should == true
+        end
+      end
+    end
   end
 end

spec/unit/target/pod_target_spec.rb

@@ -102,5 +102,27 @@ module Pod
       end
     end
 
+    describe 'Product type dependent helpers' do
+      describe 'With libraries' do
+        before do
+          @pod_target = fixture_pod_target('banana-lib/BananaLib.podspec')
+        end
+
+        it 'returns that it does not use swift' do
+          @pod_target.uses_swift?.should == false
+        end
+      end
+
+      describe 'With frameworks' do
+        before do
+          @pod_target = fixture_pod_target('orange-framework/OrangeFramework.podspec')
+        end
+
+        it 'returns that it uses swift' do
+          @pod_target.uses_swift?.should == true
+        end
+      end
+    end
+
   end
 end