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import os
import re
import sys
import warnings
from inspect import cleandoc
from pathlib import Path
from typing import Union
from setuptools.extern import packaging
from ._deprecation_warning import SetuptoolsDeprecationWarning
_Path = Union[str, Path]
# https://packaging.python.org/en/latest/specifications/core-metadata/#name
_VALID_NAME = re.compile(r"^([A-Z0-9]|[A-Z0-9][A-Z0-9._-]*[A-Z0-9])$", re.I)
_UNSAFE_NAME_CHARS = re.compile(r"[^A-Z0-9.]+", re.I)
def path(filename: _Path) -> str:
"""Normalize a file/dir name for comparison purposes."""
# See pkg_resources.normalize_path
file = os.path.abspath(filename) if sys.platform == 'cygwin' else filename
return os.path.normcase(os.path.realpath(os.path.normpath(file)))
def safe_identifier(name: str) -> str:
"""Make a string safe to be used as Python identifier.
>>> safe_identifier("12abc")
'_12abc'
>>> safe_identifier("__editable__.myns.pkg-78.9.3_local")
'__editable___myns_pkg_78_9_3_local'
"""
safe = re.sub(r'\W|^(?=\d)', '_', name)
assert safe.isidentifier()
return safe
def safe_name(component: str) -> str:
"""Escape a component used as a project name according to Core Metadata.
>>> safe_name("hello world")
'hello-world'
>>> safe_name("hello?world")
'hello-world'
"""
# See pkg_resources.safe_name
return _UNSAFE_NAME_CHARS.sub("-", component)
def safe_version(version: str) -> str:
"""Convert an arbitrary string into a valid version string.
>>> safe_version("1988 12 25")
'1988.12.25'
>>> safe_version("v0.2.1")
'0.2.1'
>>> safe_version("v0.2?beta")
'0.2b0'
>>> safe_version("v0.2 beta")
'0.2b0'
>>> safe_version("ubuntu lts")
Traceback (most recent call last):
...
setuptools.extern.packaging.version.InvalidVersion: Invalid version: 'ubuntu.lts'
"""
v = version.replace(' ', '.')
try:
return str(packaging.version.Version(v))
except packaging.version.InvalidVersion:
attempt = _UNSAFE_NAME_CHARS.sub("-", v)
return str(packaging.version.Version(attempt))
def best_effort_version(version: str) -> str:
"""Convert an arbitrary string into a version-like string.
>>> best_effort_version("v0.2 beta")
'0.2b0'
>>> import warnings
>>> warnings.simplefilter("ignore", category=SetuptoolsDeprecationWarning)
>>> best_effort_version("ubuntu lts")
'ubuntu.lts'
"""
try:
return safe_version(version)
except packaging.version.InvalidVersion:
msg = f"""Invalid version: {version!r}.
!!\n\n
###################
# Invalid version #
###################
{version!r} is not valid according to PEP 440.\n
Please make sure specify a valid version for your package.
Also note that future releases of setuptools may halt the build process
if an invalid version is given.
\n\n!!
"""
warnings.warn(cleandoc(msg), SetuptoolsDeprecationWarning)
v = version.replace(' ', '.')
return safe_name(v).strip("_")
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