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"""Utility functions."""
import re
import sys
import base64
import json
import sysconfig
from distutils.util import get_platform
__all__ = ['urlsafe_b64encode', 'urlsafe_b64decode', 'utf8', 'to_json',
'from_json', 'generate_supported', 'get_abbr_impl', 'get_impl_ver']
def urlsafe_b64encode(data):
"""urlsafe_b64encode without padding"""
return base64.urlsafe_b64encode(data).rstrip(b'=')
def urlsafe_b64decode(data):
"""urlsafe_b64decode without padding"""
pad = b'=' * (4 - (len(data) & 3))
return base64.urlsafe_b64decode(data + pad)
def to_json(o):
return json.dumps(o, sort_keys=True)
def from_json(j):
return json.loads(j)
try:
unicode
def utf8(data):
if isinstance(data, unicode):
return data.encode('utf-8')
return data
except NameError:
def utf8(data):
if isinstance(data, str):
return data.encode('utf-8')
return data
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():
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 generate_supported(versions=None):
# XXX: Only a draft
supported = []
current_ver = get_impl_ver()
# Versions must be given with respect to the preference
if versions is None:
versions = [''.join(map(str, sys.version_info[:2]))]
impl = get_abbr_impl()
abis = ['noabi'] # XXX: Fix here
arch = get_platform().replace('.', '_').replace('-', '_')
for version in versions:
for abi in abis:
supported.append(('%s%s' % (impl, version), abi, arch))
if not impl.startswith('py'):
# Add pure Python distributions if not already done so
supported.append(('py%s' % (version), 'noabi', 'noarch'))
return supported
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