[PodTargetInstaller] Allow installing a custom module map file

Gemfile

@@ -15,7 +15,7 @@ gem 'json', '1.7.7'
 
 group :development do
   cp_gem 'claide',               'CLAide'
-  cp_gem 'cocoapods-core',       'Core'
+  cp_gem 'cocoapods-core',       'Core', 'seg-module-map'
   cp_gem 'cocoapods-downloader', 'cocoapods-downloader'
   cp_gem 'cocoapods-plugins',    'cocoapods-plugins'
   cp_gem 'cocoapods-trunk',      'cocoapods-trunk'

Gemfile.lock

@@ -7,8 +7,8 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Core.git
-  revision: ff06595f0151dd5d2ba247251f87bab63ece1cfb
-  branch: master
+  revision: 84675265bd37751d1e344275c56d19046624262d
+  branch: seg-module-map
   specs:
     cocoapods-core (0.36.3)
       activesupport (>= 3.2.15)

lib/cocoapods/installer/target_installer/pod_target_installer.rb

@@ -244,6 +244,20 @@ module Pod
         group.new_file(path)
       end
 
+      def create_module_map
+        return super unless module_map = target.file_accessors.first.module_map
+        path = target.module_map_path
+        UI.message "- Copying module map file to #{UI.path(path)}" do
+          FileUtils.cp(module_map, path)
+          add_file_to_support_group(path)
+
+          native_target.build_configurations.each do |c|
+            relative_path = path.relative_path_from(sandbox.root)
+            c.build_settings['MODULEMAP_FILE'] = relative_path.to_s
+          end
+        end
+      end
+
       #-----------------------------------------------------------------------#
     end
   end

lib/cocoapods/sandbox/file_accessor.rb

@@ -212,6 +212,14 @@ module Pod
         end
       end
 
+      # @return [Pathname] The path of the custom module map file of the
+      #         specification, if specified.
+      def module_map
+        if module_map = spec_consumer.spec.root.module_map
+          path_list.root + module_map
+        end
+      end
+
       #-----------------------------------------------------------------------#
 
       private

lib/cocoapods/validator.rb

@@ -402,6 +402,10 @@ module Pod
         unless file_accessor.license || spec.license && (spec.license[:type] == 'Public Domain' || spec.license[:text])
           warning('license', 'Unable to find a license file')
         end
+
+        if spec.module_map && !file_accessor.module_map.exist?
+          error('module_map', "Unable to find the specified module map file.")
+        end
       end
     end