Adding an to make the pip wheel invocation more or less verbose

cibuildwheel/macos.py

@@ -7,10 +7,10 @@ try:
 except ImportError:
     from pipes import quote as shlex_quote
 
-from .util import prepare_command
+from .util import prepare_command, get_build_verbosity_flag
 
 
-def build(project_dir, package_name, output_dir, test_command, test_requires, before_build, skip, environment):
+def build(project_dir, package_name, output_dir, test_command, test_requires, before_build, build_verbosity, skip, environment):
     PythonConfiguration = namedtuple('PythonConfiguration', ['version', 'identifier', 'url'])
     python_configurations = [
         PythonConfiguration(version='2.7', identifier='cp27-macosx_10_6_intel', url='https://www.python.org/ftp/python/2.7.14/python-2.7.14-macosx10.6.pkg'),
@@ -87,7 +87,7 @@ def build(project_dir, package_name, output_dir, test_command, test_requires, be
             call(before_build_prepared, env=env, shell=True)
 
         # build the wheel
-        call([pip, 'wheel', abs_project_dir, '-w', '/tmp/built_wheel', '--no-deps'], env=env)
+        call([pip, 'wheel', abs_project_dir, '-w', '/tmp/built_wheel', '--no-deps', get_build_verbosity_flag(build_verbosity)], env=env)
         built_wheel = glob('/tmp/built_wheel/*.whl')[0]
 
         if built_wheel.endswith('none-any.whl'):