[Installer] Reject installation if a static library is used as a transitive…

[Installer] Reject installation if a static library is used as a transitive dependency while integrating Pods as frameworks.

CHANGELOG.md

@@ -35,6 +35,11 @@ To install release candidates run `[sudo] gem install cocoapods --pre`
   [Boris Bügling](https://github.com/neonichu)
   [#2963](https://github.com/CocoaPods/CocoaPods/issues/2963)
 
+* Reject installation if a static library is used as a transitive dependency
+  while integrating Pods as frameworks.  
+  [Samuel Giddins](https://github.com/segiddins)
+  [#2926](https://github.com/CocoaPods/CocoaPods/issues/2926)
+
 ##### Bug Fixes
 
 * Added support for .tpp C++ header files in specs (previously were getting

lib/cocoapods/installer.rb

@@ -91,6 +91,7 @@ module Pod
       download_dependencies
       determine_dependency_product_types
       verify_no_duplicate_framework_names
+      verify_no_static_framework_transitive_dependencies
       generate_pods_project
       integrate_user_project if config.integrate_targets?
       perform_post_install_actions
@@ -345,6 +346,29 @@ module Pod
       end
     end
 
+    def verify_no_static_framework_transitive_dependencies
+      aggregate_targets.each do |aggregate_target|
+        next unless aggregate_target.requires_frameworks?
+
+        aggregate_target.user_build_configurations.keys.each do |config|
+          pod_targets = aggregate_target.pod_targets_for_build_configuration(config)
+
+          dependencies = pod_targets.flat_map(&:dependencies)
+          dependended_upon_targets = pod_targets.select { |t| dependencies.include?(t.pod_name) }
+
+          static_libs = dependended_upon_targets.flat_map(&:file_accessors).flat_map do |fa|
+            static_frameworks = fa.vendored_frameworks.reject { |fw| `file #{fw + fw.basename('.framework')} 2>&1` =~ /dynamically linked/ }
+            fa.vendored_libraries + static_frameworks
+          end
+
+          unless static_libs.empty?
+            raise Informative, "The '#{aggregate_target.label}' target has " \
+              "transitive dependencies that include static binaries: (#{static_libs.to_sentence})"
+          end
+        end
+      end
+    end
+
     # Performs any post-installation actions
     #
     # @return [void]

spec/unit/installer_spec.rb

@@ -50,6 +50,7 @@ module Pod
         @installer.stubs(:download_dependencies)
         @installer.stubs(:determine_dependency_product_types)
         @installer.stubs(:verify_no_duplicate_framework_names)
+        @installer.stubs(:verify_no_static_framework_transitive_dependencies)
         @installer.stubs(:generate_pods_project)
         @installer.stubs(:integrate_user_project)
         @installer.stubs(:run_plugins_post_install_hooks)
@@ -118,6 +119,7 @@ module Pod
 
     describe '#determine_dependency_product_type' do
       it 'does propagate that frameworks are required to all pod targets' do
+        Sandbox::FileAccessor.any_instance.stubs(:vendored_libraries).returns([])
         fixture_path = ROOT + 'spec/fixtures'
         config.repos_dir = fixture_path + 'spec-repos'
         podfile = Pod::Podfile.new do
@@ -167,6 +169,28 @@ module Pod
 
     #-------------------------------------------------------------------------#
 
+    describe '#verify_no_static_framework_transitive_dependencies' do
+      it 'detects transitive static dependencies' do
+        Sandbox::FileAccessor.any_instance.stubs(:vendored_libraries).returns([Pathname('libThing.a')])
+        fixture_path = ROOT + 'spec/fixtures'
+        config.repos_dir = fixture_path + 'spec-repos'
+        podfile = Pod::Podfile.new do
+          platform :ios, '8.0'
+          xcodeproj 'SampleProject/SampleProject'
+          pod 'BananaLib',       :path => (fixture_path + 'banana-lib').to_s
+          pod 'OrangeFramework', :path => (fixture_path + 'orange-framework').to_s
+          pod 'monkey',          :path => (fixture_path + 'monkey').to_s
+        end
+        lockfile = generate_lockfile
+        config.integrate_targets = false
+
+        @installer = Installer.new(config.sandbox, podfile, lockfile)
+        should.raise(Informative) { @installer.install! }.message.should.match /transitive.*libThing/
+      end
+    end
+
+    #-------------------------------------------------------------------------#
+
     describe 'Dependencies Resolution' do
       describe '#analyze' do
         it 'prints a warning if the version of the Lockfile is higher than the one of the executable' do