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from __future__ import absolute_import |
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import hashlib |
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import logging |
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import sys |
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from pip._internal.cli.base_command import Command |
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from pip._internal.cli.status_codes import ERROR, SUCCESS |
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from pip._internal.utils.hashes import FAVORITE_HASH, STRONG_HASHES |
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from pip._internal.utils.misc import read_chunks, write_output |
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING |
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if MYPY_CHECK_RUNNING: |
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from optparse import Values |
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from typing import List |
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logger = logging.getLogger(__name__) |
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class HashCommand(Command): |
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""" |
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Compute a hash of a local package archive. |
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These can be used with --hash in a requirements file to do repeatable |
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installs. |
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""" |
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usage = '%prog [options] <file> ...' |
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ignore_require_venv = True |
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def add_options(self): |
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self.cmd_opts.add_option( |
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'-a', '--algorithm', |
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dest='algorithm', |
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choices=STRONG_HASHES, |
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action='store', |
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default=FAVORITE_HASH, |
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help='The hash algorithm to use: one of {}'.format( |
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', '.join(STRONG_HASHES))) |
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self.parser.insert_option_group(0, self.cmd_opts) |
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def run(self, options, args): |
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if not args: |
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self.parser.print_usage(sys.stderr) |
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return ERROR |
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algorithm = options.algorithm |
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for path in args: |
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write_output('%s:\n--hash=%s:%s', |
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path, algorithm, _hash_of_file(path, algorithm)) |
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return SUCCESS |
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def _hash_of_file(path, algorithm): |
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"""Return the hash digest of a file.""" |
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with open(path, 'rb') as archive: |
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hash = hashlib.new(algorithm) |
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for chunk in read_chunks(archive): |
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hash.update(chunk) |
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return hash.hexdigest() |
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