[Frameworks] Add project/dylib/compatibility versions.

lib/cocoapods/installer/target_installer/pod_target_installer.rb

@@ -36,6 +36,24 @@ module Pod
 
       private
 
+      # Adds the project/library and compatibility versions, which are only
+      # applicable to dynamic libraries.
+      #
+      # @return [Hash{String => String}]
+      #
+      def custom_build_settings
+        settings = super
+        if target.requires_frameworks?
+          version = target.root_spec.version
+          compatibility_version = version.segments.first
+          compatibility_version = version.version if compatibility_version < 1
+          settings['CURRENT_PROJECT_VERSION'] = version.version
+          settings['DYLIB_COMPATIBILITY_VERSION'] = compatibility_version.to_s
+          settings['DYLIB_CURRENT_VERSION'] = '$(CURRENT_PROJECT_VERSION)'
+        end
+        settings
+      end
+
       #-----------------------------------------------------------------------#
 
       SOURCE_FILE_EXTENSIONS = Sandbox::FileAccessor::SOURCE_FILE_EXTENSIONS

spec/unit/installer/target_installer/pod_target_installer_spec.rb

@@ -219,6 +219,7 @@ module Pod
       end
 
       #--------------------------------------------------------------------------------#
+
       describe 'concerning compiler flags' do
         before do
           @spec = Pod::Spec.new
@@ -296,6 +297,33 @@ module Pod
           end
         end
       end
+
+      #--------------------------------------------------------------------------------#
+
+      describe 'concerning framework versions' do
+        before do
+          @pod_target.stubs(:requires_frameworks? => true)
+          @spec.stubs(:version => Version.new('1.2.3'))
+        end
+
+        it 'sets the project and library version' do
+          settings = @installer.send(:custom_build_settings)
+          settings['CURRENT_PROJECT_VERSION'].should == '1.2.3'
+          settings['DYLIB_CURRENT_VERSION'].should == '$(CURRENT_PROJECT_VERSION)'
+        end
+
+        it 'sets the library compatibility version to the major version' do
+          settings = @installer.send(:custom_build_settings)
+          settings['DYLIB_COMPATIBILITY_VERSION'].should == '1'
+        end
+
+        it 'sets the library compatibility version to the exact version when it is less than v1 (because SemVer makes no promises)' do
+          @spec.stubs(:version => Version.new('0.1.2'))
+          settings = @installer.send(:custom_build_settings)
+          settings['DYLIB_COMPATIBILITY_VERSION'].should == '0.1.2'
+        end
+      end
+
     end
   end
 end