When integrating pods as frameworks, only link public headers into the sandbox…

When integrating pods as frameworks, only link public headers into the sandbox if those headers are from a Pod that is not being built (that is, a static library pod that's being statically linked into the user target).

lib/cocoapods/installer/file_references_installer.rb

@@ -118,15 +118,24 @@ module Pod
               framework_exp = /\.framework\//
               headers_sandbox = Pathname.new(file_accessor.spec.root.name)
               pod_target.build_headers.add_search_path(headers_sandbox, pod_target.platform)
+
+              # When integrating Pod as frameworks, built Pods are built into
+              # frameworks, whose headers are included inside the built
+              # framework. Those headers do not need to be linked from the
+              # sandbox.
+              unless pod_target.requires_frameworks? && pod_target.should_build?
                 sandbox.public_headers.add_search_path(headers_sandbox, pod_target.platform)
+              end
 
               header_mappings(headers_sandbox, file_accessor, file_accessor.headers).each do |namespaced_path, files|
                 pod_target.build_headers.add_files(namespaced_path, files.reject { |f| f.to_path =~ framework_exp }, pod_target.platform)
               end
 
+              unless pod_target.requires_frameworks? && pod_target.should_build?
                 header_mappings(headers_sandbox, file_accessor, file_accessor.public_headers).each do |namespaced_path, files|
                   sandbox.public_headers.add_files(namespaced_path, files.reject { |f| f.to_path =~ framework_exp }, pod_target.platform)
                 end
+              end
 
               vendored_frameworks_header_mappings(headers_sandbox, file_accessor).each do |namespaced_path, files|
                 sandbox.public_headers.add_files(namespaced_path, files, pod_target.platform)

spec/fixtures/monkey/monkey.podspec

@@ -8,4 +8,5 @@ Pod::Spec.new do |s|
   s.source           = { :git => "http://monkey.local/monkey.git", :tag => s.version.to_s }
   s.license          = 'MIT'
   s.vendored_library = 'monkey.a'
+  s.public_header_files = 'monkey.h'
 end

spec/unit/installer/file_references_installer_spec.rb

@@ -70,6 +70,22 @@ module Pod
         framework_header.should.exist
         framework_subdir_header.should.exist
       end
+
+      it 'links the public headers meant for the user, but only for Pods that are not built' do
+        Target.any_instance.stubs(:requires_frameworks?).returns(true)
+        pod_target_one = fixture_pod_target('banana-lib/BananaLib.podspec')
+        pod_target_two = fixture_pod_target('monkey/monkey.podspec')
+        project = Project.new(config.sandbox.project_path)
+        project.add_pod_group('BananaLib', fixture('banana-lib'))
+        project.add_pod_group('monkey', fixture('monkey'))
+        installer = Installer::FileReferencesInstaller.new(config.sandbox, [pod_target_one, pod_target_two], project)
+        installer.install!
+        headers_root = config.sandbox.public_headers.root
+        banana_headers = [headers_root + 'BananaLib/Banana.h', headers_root + 'BananaLib/MoreBanana.h']
+        banana_headers.each { |banana_header| banana_header.should.not.exist }
+        monkey_header = headers_root + 'monkey/monkey.h'
+        monkey_header.should.exist
+      end
     end
 
     #-------------------------------------------------------------------------#