Set SKIP_INSTALL=YES for targets in Pods.xcodeproj

Fixes #3007.

lib/cocoapods/generator/xcconfig/aggregate_xcconfig.rb

@@ -53,6 +53,7 @@ module Pod
             'OTHER_LIBTOOLFLAGS' => '$(OTHER_LDFLAGS)',
             'PODS_ROOT' => target.relative_pods_root,
             'GCC_PREPROCESSOR_DEFINITIONS' => '$(inherited) COCOAPODS=1',
+            'SKIP_INSTALL' => 'YES',
           }
 
           if target.requires_frameworks?

lib/cocoapods/generator/xcconfig/private_pod_xcconfig.rb

@@ -54,6 +54,7 @@ module Pod
             'PODS_ROOT'  => '${SRCROOT}',
             'HEADER_SEARCH_PATHS' => XCConfigHelper.quote(search_paths),
             'GCC_PREPROCESSOR_DEFINITIONS' => '$(inherited) COCOAPODS=1',
+            'SKIP_INSTALL' => 'YES',
             # 'USE_HEADERMAP' => 'NO'
           }
 

spec/unit/generator/xcconfig/aggregate_xcconfig_spec.rb

@@ -65,6 +65,10 @@ module Pod
           it 'should configure OTHER_LIBTOOLFLAGS flags to include OTHER_LDFLAGS' do
             @xcconfig.to_hash['OTHER_LIBTOOLFLAGS'].should == '$(OTHER_LDFLAGS)'
           end
+
+          it 'will be skipped when installing' do
+            @xcconfig.to_hash['SKIP_INSTALL'].should == 'YES'
+          end
         end
 
         #-----------------------------------------------------------------------#

spec/unit/generator/xcconfig/private_pod_xcconfig_spec.rb

@@ -62,6 +62,10 @@ module Pod
             @xcconfig.to_hash['PODS_ROOT'].should == '${SRCROOT}'
           end
 
+          it 'will be skipped when installing' do
+            @xcconfig.to_hash['SKIP_INSTALL'].should == 'YES'
+          end
+
           it 'saves the xcconfig' do
             path = temporary_directory + 'sample.xcconfig'
             @generator.save_as(path)