2020-07-28 16:24:53 +08:00
|
|
|
"""
|
|
|
|
|
Copyright 2017 Snyk Ltd.
|
|
|
|
|
|
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
|
|
you may not use this file except in compliance with the License.
|
|
|
|
|
You may obtain a copy of the License at
|
|
|
|
|
|
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
|
|
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
|
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
|
|
See the License for the specific language governing permissions and
|
|
|
|
|
limitations under the License.
|
|
|
|
|
"""
|
2020-07-28 15:42:47 +08:00
|
|
|
import sys
|
|
|
|
|
import re
|
|
|
|
|
from importlib import import_module
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def canonicalize_dist_name(name):
|
|
|
|
|
# https://packaging.python.org/guides/distributing-packages-using-setuptools/#name
|
|
|
|
|
name = name.lower().replace('-', '.').replace('_', '.')
|
|
|
|
|
name = re.sub(r'\.+', '.', name)
|
|
|
|
|
return name
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def guess_version(pkg_key, default='?'):
|
|
|
|
|
"""Guess the version of a pkg when pip doesn't provide it
|
|
|
|
|
:param str pkg_key: key of the package
|
|
|
|
|
:param str default: default version to return if unable to find
|
|
|
|
|
:returns: version
|
|
|
|
|
:rtype: string
|
|
|
|
|
"""
|
|
|
|
|
try:
|
|
|
|
|
m = import_module(pkg_key)
|
|
|
|
|
except ImportError:
|
|
|
|
|
return default
|
|
|
|
|
else:
|
|
|
|
|
return getattr(m, '__version__', default)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def is_string(obj):
|
|
|
|
|
"""Check whether an object is a string"""
|
|
|
|
|
if sys.version_info < (3,):
|
|
|
|
|
# Python 2.x only
|
|
|
|
|
return isinstance(obj, basestring)
|
|
|
|
|
else:
|
|
|
|
|
return isinstance(obj, str)
|
