python (3.11.7)
1 import hashlib
2 import logging
3 import sys
4 from optparse import Values
5 from typing import List
6
7 from pip._internal.cli.base_command import Command
8 from pip._internal.cli.status_codes import ERROR, SUCCESS
9 from pip._internal.utils.hashes import FAVORITE_HASH, STRONG_HASHES
10 from pip._internal.utils.misc import read_chunks, write_output
11
12 logger = logging.getLogger(__name__)
13
14
15 class ESC[4;38;5;81mHashCommand(ESC[4;38;5;149mCommand):
16 """
17 Compute a hash of a local package archive.
18
19 These can be used with --hash in a requirements file to do repeatable
20 installs.
21 """
22
23 usage = "%prog [options] <file> ..."
24 ignore_require_venv = True
25
26 def add_options(self) -> None:
27 self.cmd_opts.add_option(
28 "-a",
29 "--algorithm",
30 dest="algorithm",
31 choices=STRONG_HASHES,
32 action="store",
33 default=FAVORITE_HASH,
34 help="The hash algorithm to use: one of {}".format(
35 ", ".join(STRONG_HASHES)
36 ),
37 )
38 self.parser.insert_option_group(0, self.cmd_opts)
39
40 def run(self, options: Values, args: List[str]) -> int:
41 if not args:
42 self.parser.print_usage(sys.stderr)
43 return ERROR
44
45 algorithm = options.algorithm
46 for path in args:
47 write_output(
48 "%s:\n--hash=%s:%s", path, algorithm, _hash_of_file(path, algorithm)
49 )
50 return SUCCESS
51
52
53 def _hash_of_file(path: str, algorithm: str) -> str:
54 """Return the hash digest of a file."""
55 with open(path, "rb") as archive:
56 hash = hashlib.new(algorithm)
57 for chunk in read_chunks(archive):
58 hash.update(chunk)
59 return hash.hexdigest()
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