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annotate lib/python3.8/site-packages/pip/_internal/commands/hash.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 # The following comment should be removed at some point in the future.
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2 # mypy: disallow-untyped-defs=False
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3
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4 from __future__ import absolute_import
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5
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6 import hashlib
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7 import logging
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8 import sys
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9
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10 from pip._internal.cli.base_command import Command
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11 from pip._internal.cli.status_codes import ERROR
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12 from pip._internal.utils.hashes import FAVORITE_HASH, STRONG_HASHES
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13 from pip._internal.utils.misc import read_chunks, write_output
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14
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15 logger = logging.getLogger(__name__)
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17
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18 class HashCommand(Command):
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19 """
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20 Compute a hash of a local package archive.
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21
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22 These can be used with --hash in a requirements file to do repeatable
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23 installs.
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24 """
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25
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26 usage = '%prog [options] <file> ...'
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27 ignore_require_venv = True
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28
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29 def __init__(self, *args, **kw):
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30 super(HashCommand, self).__init__(*args, **kw)
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31 self.cmd_opts.add_option(
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32 '-a', '--algorithm',
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33 dest='algorithm',
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34 choices=STRONG_HASHES,
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35 action='store',
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36 default=FAVORITE_HASH,
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37 help='The hash algorithm to use: one of %s' %
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38 ', '.join(STRONG_HASHES))
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39 self.parser.insert_option_group(0, self.cmd_opts)
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40
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41 def run(self, options, args):
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42 if not args:
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43 self.parser.print_usage(sys.stderr)
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44 return ERROR
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45
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46 algorithm = options.algorithm
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47 for path in args:
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48 write_output('%s:\n--hash=%s:%s',
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49 path, algorithm, _hash_of_file(path, algorithm))
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51
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52 def _hash_of_file(path, algorithm):
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53 """Return the hash digest of a file."""
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54 with open(path, 'rb') as archive:
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55 hash = hashlib.new(algorithm)
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56 for chunk in read_chunks(archive):
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57 hash.update(chunk)
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58 return hash.hexdigest()