You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
348 lines
12 KiB
Python
348 lines
12 KiB
Python
2 years ago
|
#
|
||
|
|
# distutils/version.py
|
||
|
|
#
|
||
|
|
# Implements multiple version numbering conventions for the
|
||
|
|
# Python Module Distribution Utilities.
|
||
|
|
#
|
||
|
|
# $Id$
|
||
|
|
#
|
||
|
|
|
||
|
|
"""Provides classes to represent module version numbers (one class for
|
||
|
|
each style of version numbering). There are currently two such classes
|
||
|
|
implemented: StrictVersion and LooseVersion.
|
||
|
|
|
||
|
|
Every version number class implements the following interface:
|
||
|
|
* the 'parse' method takes a string and parses it to some internal
|
||
|
|
representation; if the string is an invalid version number,
|
||
|
|
'parse' raises a ValueError exception
|
||
|
|
* the class constructor takes an optional string argument which,
|
||
|
|
if supplied, is passed to 'parse'
|
||
|
|
* __str__ reconstructs the string that was passed to 'parse' (or
|
||
|
|
an equivalent string -- ie. one that will generate an equivalent
|
||
|
|
version number instance)
|
||
|
|
* __repr__ generates Python code to recreate the version number instance
|
||
|
|
* _cmp compares the current instance with either another instance
|
||
|
|
of the same class or a string (which will be parsed to an instance
|
||
|
|
of the same class, thus must follow the same rules)
|
||
|
|
"""
|
||
|
|
|
||
|
|
import re
|
||
|
|
|
||
|
|
class Version:
|
||
|
|
"""Abstract base class for version numbering classes. Just provides
|
||
|
|
constructor (__init__) and reproducer (__repr__), because those
|
||
|
|
seem to be the same for all version numbering classes; and route
|
||
|
|
rich comparisons to _cmp.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__ (self, vstring=None):
|
||
|
|
if vstring:
|
||
|
|
self.parse(vstring)
|
||
|
|
|
||
|
|
def __repr__ (self):
|
||
|
|
return "%s ('%s')" % (self.__class__.__name__, str(self))
|
||
|
|
|
||
|
|
def __eq__(self, other):
|
||
|
|
c = self._cmp(other)
|
||
|
|
if c is NotImplemented:
|
||
|
|
return c
|
||
|
|
return c == 0
|
||
|
|
|
||
|
|
def __lt__(self, other):
|
||
|
|
c = self._cmp(other)
|
||
|
|
if c is NotImplemented:
|
||
|
|
return c
|
||
|
|
return c < 0
|
||
|
|
|
||
|
|
def __le__(self, other):
|
||
|
|
c = self._cmp(other)
|
||
|
|
if c is NotImplemented:
|
||
|
|
return c
|
||
|
|
return c <= 0
|
||
|
|
|
||
|
|
def __gt__(self, other):
|
||
|
|
c = self._cmp(other)
|
||
|
|
if c is NotImplemented:
|
||
|
|
return c
|
||
|
|
return c > 0
|
||
|
|
|
||
|
|
def __ge__(self, other):
|
||
|
|
c = self._cmp(other)
|
||
|
|
if c is NotImplemented:
|
||
|
|
return c
|
||
|
|
return c >= 0
|
||
|
|
|
||
|
|
|
||
|
|
# Interface for version-number classes -- must be implemented
|
||
|
|
# by the following classes (the concrete ones -- Version should
|
||
|
|
# be treated as an abstract class).
|
||
|
|
# __init__ (string) - create and take same action as 'parse'
|
||
|
|
# (string parameter is optional)
|
||
|
|
# parse (string) - convert a string representation to whatever
|
||
|
|
# internal representation is appropriate for
|
||
|
|
# this style of version numbering
|
||
|
|
# __str__ (self) - convert back to a string; should be very similar
|
||
|
|
# (if not identical to) the string supplied to parse
|
||
|
|
# __repr__ (self) - generate Python code to recreate
|
||
|
|
# the instance
|
||
|
|
# _cmp (self, other) - compare two version numbers ('other' may
|
||
|
|
# be an unparsed version string, or another
|
||
|
|
# instance of your version class)
|
||
|
|
|
||
|
|
|
||
|
|
class StrictVersion (Version):
|
||
|
|
|
||
|
|
"""Version numbering for anal retentives and software idealists.
|
||
|
|
Implements the standard interface for version number classes as
|
||
|
|
described above. A version number consists of two or three
|
||
|
|
dot-separated numeric components, with an optional "pre-release" tag
|
||
|
|
on the end. The pre-release tag consists of the letter 'a' or 'b'
|
||
|
|
followed by a number. If the numeric components of two version
|
||
|
|
numbers are equal, then one with a pre-release tag will always
|
||
|
|
be deemed earlier (lesser) than one without.
|
||
|
|
|
||
|
|
The following are valid version numbers (shown in the order that
|
||
|
|
would be obtained by sorting according to the supplied cmp function):
|
||
|
|
|
||
|
|
0.4 0.4.0 (these two are equivalent)
|
||
|
|
0.4.1
|
||
|
|
0.5a1
|
||
|
|
0.5b3
|
||
|
|
0.5
|
||
|
|
0.9.6
|
||
|
|
1.0
|
||
|
|
1.0.4a3
|
||
|
|
1.0.4b1
|
||
|
|
1.0.4
|
||
|
|
|
||
|
|
The following are examples of invalid version numbers:
|
||
|
|
|
||
|
|
1
|
||
|
|
2.7.2.2
|
||
|
|
1.3.a4
|
||
|
|
1.3pl1
|
||
|
|
1.3c4
|
||
|
|
|
||
|
|
The rationale for this version numbering system will be explained
|
||
|
|
in the distutils documentation.
|
||
|
|
"""
|
||
|
|
|
||
|
|
version_re = re.compile(r'^(\d+) \. (\d+) (\. (\d+))? ([ab](\d+))?$',
|
||
|
|
re.VERBOSE | re.ASCII)
|
||
|
|
|
||
|
|
|
||
|
|
def parse (self, vstring):
|
||
|
|
match = self.version_re.match(vstring)
|
||
|
|
if not match:
|
||
|
|
raise ValueError("invalid version number '%s'" % vstring)
|
||
|
|
|
||
|
|
(major, minor, patch, prerelease, prerelease_num) = \
|
||
|
|
match.group(1, 2, 4, 5, 6)
|
||
|
|
|
||
|
|
if patch:
|
||
|
|
self.version = tuple(map(int, [major, minor, patch]))
|
||
|
|
else:
|
||
|
|
self.version = tuple(map(int, [major, minor])) + (0,)
|
||
|
|
|
||
|
|
if prerelease:
|
||
|
|
self.prerelease = (prerelease[0], int(prerelease_num))
|
||
|
|
else:
|
||
|
|
self.prerelease = None
|
||
|
|
|
||
|
|
|
||
|
|
def __str__ (self):
|
||
|
|
|
||
|
|
if self.version[2] == 0:
|
||
|
|
vstring = '.'.join(map(str, self.version[0:2]))
|
||
|
|
else:
|
||
|
|
vstring = '.'.join(map(str, self.version))
|
||
|
|
|
||
|
|
if self.prerelease:
|
||
|
|
vstring = vstring + self.prerelease[0] + str(self.prerelease[1])
|
||
|
|
|
||
|
|
return vstring
|
||
|
|
|
||
|
|
|
||
|
|
def _cmp (self, other):
|
||
|
|
if isinstance(other, str):
|
||
|
|
other = StrictVersion(other)
|
||
|
|
elif not isinstance(other, StrictVersion):
|
||
|
|
return NotImplemented
|
||
|
|
|
||
|
|
if self.version != other.version:
|
||
|
|
# numeric versions don't match
|
||
|
|
# prerelease stuff doesn't matter
|
||
|
|
if self.version < other.version:
|
||
|
|
return -1
|
||
|
|
else:
|
||
|
|
return 1
|
||
|
|
|
||
|
|
# have to compare prerelease
|
||
|
|
# case 1: neither has prerelease; they're equal
|
||
|
|
# case 2: self has prerelease, other doesn't; other is greater
|
||
|
|
# case 3: self doesn't have prerelease, other does: self is greater
|
||
|
|
# case 4: both have prerelease: must compare them!
|
||
|
|
|
||
|
|
if (not self.prerelease and not other.prerelease):
|
||
|
|
return 0
|
||
|
|
elif (self.prerelease and not other.prerelease):
|
||
|
|
return -1
|
||
|
|
elif (not self.prerelease and other.prerelease):
|
||
|
|
return 1
|
||
|
|
elif (self.prerelease and other.prerelease):
|
||
|
|
if self.prerelease == other.prerelease:
|
||
|
|
return 0
|
||
|
|
elif self.prerelease < other.prerelease:
|
||
|
|
return -1
|
||
|
|
else:
|
||
|
|
return 1
|
||
|
|
else:
|
||
|
|
assert False, "never get here"
|
||
|
|
|
||
|
|
# end class StrictVersion
|
||
|
|
|
||
|
|
|
||
|
|
# The rules according to Greg Stein:
|
||
|
|
# 1) a version number has 1 or more numbers separated by a period or by
|
||
|
|
# sequences of letters. If only periods, then these are compared
|
||
|
|
# left-to-right to determine an ordering.
|
||
|
|
# 2) sequences of letters are part of the tuple for comparison and are
|
||
|
|
# compared lexicographically
|
||
|
|
# 3) recognize the numeric components may have leading zeroes
|
||
|
|
#
|
||
|
|
# The LooseVersion class below implements these rules: a version number
|
||
|
|
# string is split up into a tuple of integer and string components, and
|
||
|
|
# comparison is a simple tuple comparison. This means that version
|
||
|
|
# numbers behave in a predictable and obvious way, but a way that might
|
||
|
|
# not necessarily be how people *want* version numbers to behave. There
|
||
|
|
# wouldn't be a problem if people could stick to purely numeric version
|
||
|
|
# numbers: just split on period and compare the numbers as tuples.
|
||
|
|
# However, people insist on putting letters into their version numbers;
|
||
|
|
# the most common purpose seems to be:
|
||
|
|
# - indicating a "pre-release" version
|
||
|
|
# ('alpha', 'beta', 'a', 'b', 'pre', 'p')
|
||
|
|
# - indicating a post-release patch ('p', 'pl', 'patch')
|
||
|
|
# but of course this can't cover all version number schemes, and there's
|
||
|
|
# no way to know what a programmer means without asking him.
|
||
|
|
#
|
||
|
|
# The problem is what to do with letters (and other non-numeric
|
||
|
|
# characters) in a version number. The current implementation does the
|
||
|
|
# obvious and predictable thing: keep them as strings and compare
|
||
|
|
# lexically within a tuple comparison. This has the desired effect if
|
||
|
|
# an appended letter sequence implies something "post-release":
|
||
|
|
# eg. "0.99" < "0.99pl14" < "1.0", and "5.001" < "5.001m" < "5.002".
|
||
|
|
#
|
||
|
|
# However, if letters in a version number imply a pre-release version,
|
||
|
|
# the "obvious" thing isn't correct. Eg. you would expect that
|
||
|
|
# "1.5.1" < "1.5.2a2" < "1.5.2", but under the tuple/lexical comparison
|
||
|
|
# implemented here, this just isn't so.
|
||
|
|
#
|
||
|
|
# Two possible solutions come to mind. The first is to tie the
|
||
|
|
# comparison algorithm to a particular set of semantic rules, as has
|
||
|
|
# been done in the StrictVersion class above. This works great as long
|
||
|
|
# as everyone can go along with bondage and discipline. Hopefully a
|
||
|
|
# (large) subset of Python module programmers will agree that the
|
||
|
|
# particular flavour of bondage and discipline provided by StrictVersion
|
||
|
|
# provides enough benefit to be worth using, and will submit their
|
||
|
|
# version numbering scheme to its domination. The free-thinking
|
||
|
|
# anarchists in the lot will never give in, though, and something needs
|
||
|
|
# to be done to accommodate them.
|
||
|
|
#
|
||
|
|
# Perhaps a "moderately strict" version class could be implemented that
|
||
|
|
# lets almost anything slide (syntactically), and makes some heuristic
|
||
|
|
# assumptions about non-digits in version number strings. This could
|
||
|
|
# sink into special-case-hell, though; if I was as talented and
|
||
|
|
# idiosyncratic as Larry Wall, I'd go ahead and implement a class that
|
||
|
|
# somehow knows that "1.2.1" < "1.2.2a2" < "1.2.2" < "1.2.2pl3", and is
|
||
|
|
# just as happy dealing with things like "2g6" and "1.13++". I don't
|
||
|
|
# think I'm smart enough to do it right though.
|
||
|
|
#
|
||
|
|
# In any case, I've coded the test suite for this module (see
|
||
|
|
# ../test/test_version.py) specifically to fail on things like comparing
|
||
|
|
# "1.2a2" and "1.2". That's not because the *code* is doing anything
|
||
|
|
# wrong, it's because the simple, obvious design doesn't match my
|
||
|
|
# complicated, hairy expectations for real-world version numbers. It
|
||
|
|
# would be a snap to fix the test suite to say, "Yep, LooseVersion does
|
||
|
|
# the Right Thing" (ie. the code matches the conception). But I'd rather
|
||
|
|
# have a conception that matches common notions about version numbers.
|
||
|
|
|
||
|
|
class LooseVersion (Version):
|
||
|
|
|
||
|
|
"""Version numbering for anarchists and software realists.
|
||
|
|
Implements the standard interface for version number classes as
|
||
|
|
described above. A version number consists of a series of numbers,
|
||
|
|
separated by either periods or strings of letters. When comparing
|
||
|
|
version numbers, the numeric components will be compared
|
||
|
|
numerically, and the alphabetic components lexically. The following
|
||
|
|
are all valid version numbers, in no particular order:
|
||
|
|
|
||
|
|
1.5.1
|
||
|
|
1.5.2b2
|
||
|
|
161
|
||
|
|
3.10a
|
||
|
|
8.02
|
||
|
|
3.4j
|
||
|
|
1996.07.12
|
||
|
|
3.2.pl0
|
||
|
|
3.1.1.6
|
||
|
|
2g6
|
||
|
|
11g
|
||
|
|
0.960923
|
||
|
|
2.2beta29
|
||
|
|
1.13++
|
||
|
|
5.5.kw
|
||
|
|
2.0b1pl0
|
||
|
|
|
||
|
|
In fact, there is no such thing as an invalid version number under
|
||
|
|
this scheme; the rules for comparison are simple and predictable,
|
||
|
|
but may not always give the results you want (for some definition
|
||
|
|
of "want").
|
||
|
|
"""
|
||
|
|
|
||
|
|
component_re = re.compile(r'(\d+ | [a-z]+ | \.)', re.VERBOSE)
|
||
|
|
|
||
|
|
def __init__ (self, vstring=None):
|
||
|
|
if vstring:
|
||
|
|
self.parse(vstring)
|
||
|
|
|
||
|
|
|
||
|
|
def parse (self, vstring):
|
||
|
|
# I've given up on thinking I can reconstruct the version string
|
||
|
|
# from the parsed tuple -- so I just store the string here for
|
||
|
|
# use by __str__
|
||
|
|
self.vstring = vstring
|
||
|
|
components = [x for x in self.component_re.split(vstring)
|
||
|
|
if x and x != '.']
|
||
|
|
for i, obj in enumerate(components):
|
||
|
|
try:
|
||
|
|
components[i] = int(obj)
|
||
|
|
except ValueError:
|
||
|
|
pass
|
||
|
|
|
||
|
|
self.version = components
|
||
|
|
|
||
|
|
|
||
|
|
def __str__ (self):
|
||
|
|
return self.vstring
|
||
|
|
|
||
|
|
|
||
|
|
def __repr__ (self):
|
||
|
|
return "LooseVersion ('%s')" % str(self)
|
||
|
|
|
||
|
|
|
||
|
|
def _cmp (self, other):
|
||
|
|
if isinstance(other, str):
|
||
|
|
other = LooseVersion(other)
|
||
|
|
elif not isinstance(other, LooseVersion):
|
||
|
|
return NotImplemented
|
||
|
|
|
||
|
|
if self.version == other.version:
|
||
|
|
return 0
|
||
|
|
if self.version < other.version:
|
||
|
|
return -1
|
||
|
|
if self.version > other.version:
|
||
|
|
return 1
|
||
|
|
|
||
|
|
|
||
|
|
# end class LooseVersion
|