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annotate lib/python3.8/site-packages/pip/_vendor/packaging/utils.py @ 0:9e54283cc701 draft

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400
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1 # This file is dual licensed under the terms of the Apache License, Version
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2 # 2.0, and the BSD License. See the LICENSE file in the root of this repository
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3 # for complete details.
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4 from __future__ import absolute_import, division, print_function
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5
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6 import re
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7
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8 from ._typing import MYPY_CHECK_RUNNING
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9 from .version import InvalidVersion, Version
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10
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11 if MYPY_CHECK_RUNNING: # pragma: no cover
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12 from typing import Union
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13
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14 _canonicalize_regex = re.compile(r"[-_.]+")
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15
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16
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17 def canonicalize_name(name):
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18 # type: (str) -> str
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19 # This is taken from PEP 503.
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20 return _canonicalize_regex.sub("-", name).lower()
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21
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22
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23 def canonicalize_version(_version):
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24 # type: (str) -> Union[Version, str]
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25 """
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26 This is very similar to Version.__str__, but has one subtle difference
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27 with the way it handles the release segment.
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28 """
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29
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30 try:
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31 version = Version(_version)
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32 except InvalidVersion:
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33 # Legacy versions cannot be normalized
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34 return _version
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35
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36 parts = []
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37
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38 # Epoch
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39 if version.epoch != 0:
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40 parts.append("{0}!".format(version.epoch))
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41
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42 # Release segment
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43 # NB: This strips trailing '.0's to normalize
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44 parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))
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45
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46 # Pre-release
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47 if version.pre is not None:
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48 parts.append("".join(str(x) for x in version.pre))
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49
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50 # Post-release
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51 if version.post is not None:
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52 parts.append(".post{0}".format(version.post))
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53
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54 # Development release
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55 if version.dev is not None:
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56 parts.append(".dev{0}".format(version.dev))
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57
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58 # Local version segment
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59 if version.local is not None:
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60 parts.append("+{0}".format(version.local))
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61
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62 return "".join(parts)