Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/pip/_internal/commands/hash.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 import hashlib |
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2 import logging |
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3 import sys |
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4 |
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5 from pip._internal.cli.base_command import Command |
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6 from pip._internal.cli.status_codes import ERROR, SUCCESS |
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7 from pip._internal.utils.hashes import FAVORITE_HASH, STRONG_HASHES |
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8 from pip._internal.utils.misc import read_chunks, write_output |
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9 from pip._internal.utils.typing import MYPY_CHECK_RUNNING |
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10 |
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11 if MYPY_CHECK_RUNNING: |
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12 from optparse import Values |
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13 from typing import List |
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14 |
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15 logger = logging.getLogger(__name__) |
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16 |
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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 add_options(self): |
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30 # type: () -> None |
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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 {}'.format( |
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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 # type: (Values, List[str]) -> int |
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43 if not args: |
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44 self.parser.print_usage(sys.stderr) |
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45 return ERROR |
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46 |
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47 algorithm = options.algorithm |
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48 for path in args: |
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49 write_output('%s:\n--hash=%s:%s', |
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50 path, algorithm, _hash_of_file(path, algorithm)) |
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51 return SUCCESS |
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52 |
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53 |
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54 def _hash_of_file(path, algorithm): |
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55 # type: (str, str) -> str |
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56 """Return the hash digest of a file.""" |
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57 with open(path, 'rb') as archive: |
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58 hash = hashlib.new(algorithm) |
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59 for chunk in read_chunks(archive): |
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60 hash.update(chunk) |
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61 return hash.hexdigest() |