cext: add Python 3.10 support
* Replace "Py_TYPE(obj) = type;" with "Py_SET_TYPE(obj, type);"
* Add pythoncapi_compat.h header file to get Py_SET_TYPE() on Python
2.7-3.8. Header file added to mercurial/ and
contrib/python-zstandard/zstd/common/.
In Python 3.10, Py_TYPE(obj) must not longer be used as an l-value.
pythoncapi_compat.h comes from:
https://github.com/pythoncapi/pythoncapi_compat
Differential Revision: https://phab.mercurial-scm.org/D9825
from __future__ import absolute_import
import os
if os.environ.get('COVERAGE_PROCESS_START'):
try:
import coverage
import uuid
covpath = os.path.join(
os.environ['COVERAGE_DIR'], 'cov.%s' % uuid.uuid1()
)
cov = coverage.coverage(data_file=covpath, auto_data=True)
cov._warn_no_data = False
cov._warn_unimported_source = False
cov.start()
except ImportError:
pass