Merge commit '57a2259a00bf7ea3309faa231406df8e487ae792' into python-pip-replacement

* commit '57a2259a00bf7ea3309faa231406df8e487ae792':
  Use travis-ci provided python3 on Linux
  linux: transfer ownership of the wheel to the current user
  Update changelog
  Bump version
  macOS/Windows: Update setuptools
  Drop python 3.3 support on Linux
  macOS: update to python 2.7.15
  Renaming util.get_build_verbosity_flag into util.get_build_verbosity_extra_flags
  Bump version
  windows: upgrade pip with 'python -m pip'
  Fixing empty verbosity flag argument to `subprocess.check_call`
  Adding an to make the `pip wheel` invocation more or less verbose

cibuildwheel/__main__.py

@@ -74,9 +74,15 @@ def main():
     test_requires = os.environ.get('CIBW_TEST_REQUIRES', '').split()
     project_dir = args.project_dir
     before_build = get_option_from_environment('CIBW_BEFORE_BUILD', platform=platform)
+    build_verbosity = get_option_from_environment('CIBW_BUILD_VERBOSITY', platform=platform) or ''
     skip_config = os.environ.get('CIBW_SKIP', '')
     environment_config = get_option_from_environment('CIBW_ENVIRONMENT', platform=platform) or ''
 
+    try:
+        build_verbosity = min(3, max(-3, int(build_verbosity)))
+    except ValueError:
+        build_verbosity = 0
+
     try:
         environment = parse_environment(environment_config)
     except (EnvironmentParseError, ValueError) as e:
@@ -118,6 +124,7 @@ def main():
         test_command=test_command,
         test_requires=test_requires,
         before_build=before_build,
+        build_verbosity=build_verbosity,
         skip=skip,
         environment=environment,
     )