/usr/lib/python3/dist-packages/pex/requirements.py is in python3-pex 1.1.14-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | # Copyright 2015 Pants project contributors (see CONTRIBUTORS.md).
# Licensed under the Apache License, Version 2.0 (see LICENSE).
import os
from .resolvable import Resolvable
from .resolver_options import ResolverOptionsBuilder
class UnsupportedLine(Exception):
pass
def _startswith_any(line, things):
return any(line.startswith(thing) for thing in things)
def _get_parameter(line):
sline = line.split('=')
if len(sline) != 2:
sline = line.split()
if len(sline) != 2:
raise UnsupportedLine('Unrecognized line format: %s' % line)
return sline[1]
class RequirementsTxtSentinel(object):
def __init__(self, filename):
self.filename = filename
# Process lines in the requirements.txt format as defined here:
# https://pip.pypa.io/en/latest/reference/pip_install.html#requirements-file-format
def requirements_from_lines(lines, builder=None, relpath=None):
relpath = relpath or os.getcwd()
builder = builder.clone() if builder else ResolverOptionsBuilder()
to_resolve = []
for line in lines:
line = line.strip()
if not line or line.startswith('#'):
continue
elif line.startswith('-e '):
raise UnsupportedLine('Editable distributions not supported: %s' % line)
elif _startswith_any(line, ('-i ', '--index-url')):
builder.set_index(_get_parameter(line))
elif line.startswith('--extra-index-url'):
builder.add_index(_get_parameter(line))
elif _startswith_any(line, ('-f ', '--find-links')):
builder.add_repository(_get_parameter(line))
elif line.startswith('--allow-external'):
builder.allow_external(_get_parameter(line))
elif line.startswith('--allow-all-external'):
builder.allow_all_external()
elif line.startswith('--allow-unverified'):
builder.allow_unverified(_get_parameter(line))
elif line.startswith('--no-index'):
builder.clear_indices()
elif line.startswith('--no-use-wheel'):
builder.no_use_wheel()
# defer the conversion of strings/files to resolvables until all options defined
# within the current grouping of lines has been processed.
elif _startswith_any(line, ('-r ', '--requirement')):
path = os.path.join(relpath, _get_parameter(line))
to_resolve.append(RequirementsTxtSentinel(path))
else:
to_resolve.append(line)
resolvables = []
for resolvable in to_resolve:
if isinstance(resolvable, RequirementsTxtSentinel):
resolvables.extend(requirements_from_file(resolvable.filename, builder=builder))
else:
try:
resolvables.append(Resolvable.get(resolvable, builder))
except Resolvable.Error as e:
raise UnsupportedLine('Could not resolve line: %s (%s)' % (resolvable, e))
return resolvables
def requirements_from_file(filename, builder=None):
"""Return a list of :class:`Resolvable` objects from a requirements.txt file.
:param filename: The filename of the requirements.txt
:keyword builder: (optional) The ResolverOptionsBuilder from which we should inherit
default resolver options.
:type builder: :class:`ResolverOptionsBuilder`
"""
relpath = os.path.dirname(filename)
with open(filename, 'r') as fp:
return requirements_from_lines(fp.readlines(), builder=builder, relpath=relpath)
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