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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Versions for Python packages.
See L{Version}.
"""
from __future__ import division, absolute_import
import sys
import warnings
from typing import TYPE_CHECKING, Any, TypeVar, Union, Optional, Dict
#
# Compat functions
#
_T = TypeVar("_T", contravariant=True)
if TYPE_CHECKING:
from typing_extensions import Literal
from distutils.dist import Distribution as _Distribution
else:
_Distribution = object
if sys.version_info > (3,):
def _cmp(a, b): # type: (Any, Any) -> int
"""
Compare two objects.
Returns a negative number if C{a < b}, zero if they are equal, and a
positive number if C{a > b}.
"""
if a < b:
return -1
elif a == b:
return 0
else:
return 1
else:
_cmp = cmp # noqa: F821
#
# Versioning
#
class _Inf(object):
"""
An object that is bigger than all other objects.
"""
def __cmp__(self, other): # type: (object) -> int
"""
@param other: Another object.
@type other: any
@return: 0 if other is inf, 1 otherwise.
@rtype: C{int}
"""
if other is _inf:
return 0
return 1
if sys.version_info >= (3,):
def __lt__(self, other): # type: (object) -> bool
return self.__cmp__(other) < 0
def __le__(self, other): # type: (object) -> bool
return self.__cmp__(other) <= 0
def __gt__(self, other): # type: (object) -> bool
return self.__cmp__(other) > 0
def __ge__(self, other): # type: (object) -> bool
return self.__cmp__(other) >= 0
_inf = _Inf()
class IncomparableVersions(TypeError):
"""
Two versions could not be compared.
"""
class Version(object):
"""
An encapsulation of a version for a project, with support for outputting
PEP-440 compatible version strings.
This class supports the standard major.minor.micro[rcN] scheme of
versioning.
"""
def __init__(
self,
package, # type: str
major, # type: Union[Literal["NEXT"], int]
minor, # type: int
micro, # type: int
release_candidate=None, # type: Optional[int]
prerelease=None, # type: Optional[int]
post=None, # type: Optional[int]
dev=None, # type: Optional[int]
):
"""
@param package: Name of the package that this is a version of.
@type package: C{str}
@param major: The major version number.
@type major: C{int} or C{str} (for the "NEXT" symbol)
@param minor: The minor version number.
@type minor: C{int}
@param micro: The micro version number.
@type micro: C{int}
@param release_candidate: The release candidate number.
@type release_candidate: C{int}
@param prerelease: The prerelease number. (Deprecated)
@type prerelease: C{int}
@param post: The postrelease number.
@type post: C{int}
@param dev: The development release number.
@type dev: C{int}
"""
if release_candidate and prerelease:
raise ValueError("Please only return one of these.")
elif prerelease and not release_candidate:
release_candidate = prerelease
warnings.warn(
"Passing prerelease to incremental.Version was "
"deprecated in Incremental 16.9.0. Please pass "
"release_candidate instead.",
DeprecationWarning,
stacklevel=2,
)
if major == "NEXT":
if minor or micro or release_candidate or post or dev:
raise ValueError(
"When using NEXT, all other values except Package must be 0."
)
self.package = package
self.major = major
self.minor = minor
self.micro = micro
self.release_candidate = release_candidate
self.post = post
self.dev = dev
@property
def prerelease(self): # type: () -> Optional[int]
warnings.warn(
"Accessing incremental.Version.prerelease was "
"deprecated in Incremental 16.9.0. Use "
"Version.release_candidate instead.",
DeprecationWarning,
stacklevel=2,
),
return self.release_candidate
def public(self): # type: () -> str
"""
Return a PEP440-compatible "public" representation of this L{Version}.
Examples:
- 14.4.0
- 1.2.3rc1
- 14.2.1rc1dev9
- 16.04.0dev0
"""
if self.major == "NEXT":
return self.major
if self.release_candidate is None:
rc = ""
else:
rc = ".rc%s" % (self.release_candidate,)
if self.post is None:
post = ""
else:
post = ".post%s" % (self.post,)
if self.dev is None:
dev = ""
else:
dev = ".dev%s" % (self.dev,)
return "%r.%d.%d%s%s%s" % (self.major, self.minor, self.micro, rc, post, dev)
base = public
short = public
local = public
def __repr__(self): # type: () -> str
if self.release_candidate is None:
release_candidate = ""
else:
release_candidate = ", release_candidate=%r" % (self.release_candidate,)
if self.post is None:
post = ""
else:
post = ", post=%r" % (self.post,)
if self.dev is None:
dev = ""
else:
dev = ", dev=%r" % (self.dev,)
return "%s(%r, %r, %d, %d%s%s%s)" % (
self.__class__.__name__,
self.package,
self.major,
self.minor,
self.micro,
release_candidate,
post,
dev,
)
def __str__(self): # type: () -> str
return "[%s, version %s]" % (self.package, self.short())
def __cmp__(self, other): # type: (Version) -> int
"""
Compare two versions, considering major versions, minor versions, micro
versions, then release candidates, then postreleases, then dev
releases. Package names are case insensitive.
A version with a release candidate is always less than a version
without a release candidate. If both versions have release candidates,
they will be included in the comparison.
Likewise, a version with a dev release is always less than a version
without a dev release. If both versions have dev releases, they will
be included in the comparison.
@param other: Another version.
@type other: L{Version}
@return: NotImplemented when the other object is not a Version, or one
of -1, 0, or 1.
@raise IncomparableVersions: when the package names of the versions
differ.
"""
if not isinstance(other, self.__class__):
return NotImplemented
if self.package.lower() != other.package.lower():
raise IncomparableVersions("%r != %r" % (self.package, other.package))
if self.major == "NEXT":
major = _inf # type: Union[int, _Inf]
else:
major = self.major
if self.release_candidate is None:
release_candidate = _inf # type: Union[int, _Inf]
else:
release_candidate = self.release_candidate
if self.post is None:
post = -1
else:
post = self.post
if self.dev is None:
dev = _inf # type: Union[int, _Inf]
else:
dev = self.dev
if other.major == "NEXT":
othermajor = _inf # type: Union[int, _Inf]
else:
othermajor = other.major
if other.release_candidate is None:
otherrc = _inf # type: Union[int, _Inf]
else:
otherrc = other.release_candidate
if other.post is None:
otherpost = -1
else:
otherpost = other.post
if other.dev is None:
otherdev = _inf # type: Union[int, _Inf]
else:
otherdev = other.dev
x = _cmp(
(major, self.minor, self.micro, release_candidate, post, dev),
(othermajor, other.minor, other.micro, otherrc, otherpost, otherdev),
)
return x
if sys.version_info >= (3,):
def __eq__(self, other): # type: (Any) -> bool
c = self.__cmp__(other)
if c is NotImplemented:
return c # type: ignore[return-value]
return c == 0
def __ne__(self, other): # type: (Any) -> bool
c = self.__cmp__(other)
if c is NotImplemented:
return c # type: ignore[return-value]
return c != 0
def __lt__(self, other): # type: (Version) -> bool
c = self.__cmp__(other)
if c is NotImplemented:
return c # type: ignore[return-value]
return c < 0
def __le__(self, other): # type: (Version) -> bool
c = self.__cmp__(other)
if c is NotImplemented:
return c # type: ignore[return-value]
return c <= 0
def __gt__(self, other): # type: (Version) -> bool
c = self.__cmp__(other)
if c is NotImplemented:
return c # type: ignore[return-value]
return c > 0
def __ge__(self, other): # type: (Version) -> bool
c = self.__cmp__(other)
if c is NotImplemented:
return c # type: ignore[return-value]
return c >= 0
def getVersionString(version): # type: (Version) -> str
"""
Get a friendly string for the given version object.
@param version: A L{Version} object.
@return: A string containing the package and short version number.
"""
result = "%s %s" % (version.package, version.short())
return result
def _get_version(dist, keyword, value): # type: (_Distribution, object, object) -> None
"""
Get the version from the package listed in the Distribution.
"""
if not value:
return
from distutils.command import build_py
sp_command = build_py.build_py(dist)
sp_command.finalize_options()
for item in sp_command.find_all_modules(): # type: ignore[attr-defined]
if item[1] == "_version":
version_file = {} # type: Dict[str, Version]
with open(item[2]) as f:
exec(f.read(), version_file)
dist.metadata.version = version_file["__version__"].public()
return None
raise Exception("No _version.py found.")
from ._version import __version__ # noqa: E402
def _setuptools_version(): # type: () -> str
return __version__.public()
__all__ = ["__version__", "Version", "getVersionString"]