Measure code coverage

.travis.yml

@@ -5,7 +5,8 @@ script:
   -sdk "$SDK" -destination "$DESTINATION" -derivedDataPath build
   -enableCodeCoverage YES ENABLE_TESTABILITY=YES "$ACTION"
 after_success:
-- bash <(curl -s https://codecov.io/bash)
+- ruby scripts/coverage.rb "$SCHEME"
+- bash <(curl -s https://codecov.io/bash) -f 'coverage.txt'
 env:
   matrix:
   - SDK=iphonesimulator CONFIGURATION=Debug ACTION=test

scripts/coverage.rb

@@ -0,0 +1,10 @@
+project_name = ARGV[0]
+profdata = Dir.glob(File.join('build', '/**/Coverage.profdata')).first
+Dir.glob(File.join('build', "/**/#{project_name}")) do |target|
+  output = `xcrun llvm-cov report -instr-profile "#{profdata}" "#{target}" -arch=x86_64`
+  if $?.success?
+    puts output
+    `xcrun llvm-cov show -instr-profile "#{profdata}" "#{target}" -arch=x86_64 -use-color=0 > coverage.txt`
+    break
+  end
+end