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"""Generate and work with PEP 425 Compatibility Tags."""
import sys
try:
import sysconfig
except ImportError: # pragma nocover
# Python < 2.7
import distutils.sysconfig as sysconfig
import distutils.util
def get_abbr_impl():
"""Return abbreviated implementation name."""
if hasattr(sys, 'pypy_version_info'):
pyimpl = 'pp'
elif sys.platform.startswith('java'):
pyimpl = 'jy'
elif sys.platform == 'cli':
pyimpl = 'ip'
else:
pyimpl = 'cp'
return pyimpl
def get_impl_ver():
"""Return implementation version."""
impl_ver = sysconfig.get_config_var("py_version_nodot")
if not impl_ver:
impl_ver = ''.join(map(str, sys.version_info[:2]))
return impl_ver
def get_platform():
"""Return our platform name 'win32', 'linux_x86_64'"""
# XXX remove distutils dependency
return distutils.util.get_platform().replace('.', '_').replace('-', '_')
def get_supported(versions=None):
"""Return a list of supported tags for each version specified in
`versions`.
:param versions: a list of string versions, of the form ["33", "32"],
or None. The first version will be assumed to support our ABI.
"""
supported = []
# Versions must be given with respect to the preference
if versions is None:
versions = []
major = sys.version_info[0]
# Support all previous minor Python versions.
for minor in range(sys.version_info[1], -1, -1):
versions.append(''.join(map(str, (major, minor))))
impl = get_abbr_impl()
abis = []
soabi = sysconfig.get_config_var('SOABI')
if soabi and soabi.startswith('cpython-'):
abis[0:0] = ['cp' + soabi.split('-')[1]]
abi3s = set()
import imp
for suffix in imp.get_suffixes():
if suffix[0].startswith('.abi'):
abi3s.add(suffix[0].split('.', 2)[1])
abis.extend(sorted(list(abi3s)))
abis.append('none')
arch = get_platform()
# Current version, current API (built specifically for our Python):
for abi in abis:
supported.append(('%s%s' % (impl, versions[0]), abi, arch))
# No abi / arch, but requires our implementation:
for i, version in enumerate(versions):
supported.append(('%s%s' % (impl, version), 'none', 'any'))
if i == 0:
# Tagged specifically as being cross-version compatible
# (with just the major version specified)
supported.append(('%s%s' % (impl, versions[0][0]), 'none', 'any'))
# Major Python version + platform; e.g. binaries not using the Python API
supported.append(('py%s' % (versions[0][0]), 'none', arch))
# No abi / arch, generic Python
for i, version in enumerate(versions):
supported.append(('py%s' % (version,), 'none', 'any'))
if i == 0:
supported.append(('py%s' % (version[0]), 'none', 'any'))
return supported
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