blob: a646acff3cdd91999bf5413108df337969f264f8 (
plain)
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
|
"""Utilities related to the mirror infrastructure defined in PEP 381."""
from string import ascii_lowercase
import socket
DEFAULT_MIRROR_URL = "last.pypi.python.org"
def get_mirrors(hostname=None):
"""Return the list of mirrors from the last record found on the DNS
entry::
>>> from packaging.pypi.mirrors import get_mirrors
>>> get_mirrors()
['a.pypi.python.org', 'b.pypi.python.org', 'c.pypi.python.org',
'd.pypi.python.org']
"""
if hostname is None:
hostname = DEFAULT_MIRROR_URL
# return the last mirror registered on PyPI.
try:
hostname = socket.gethostbyname_ex(hostname)[0]
except socket.gaierror:
return []
end_letter = hostname.split(".", 1)
# determine the list from the last one.
return ["%s.%s" % (s, end_letter[1]) for s in string_range(end_letter[0])]
def string_range(last):
"""Compute the range of string between "a" and last.
This works for simple "a to z" lists, but also for "a to zz" lists.
"""
for k in range(len(last)):
for x in product(ascii_lowercase, repeat=(k + 1)):
result = ''.join(x)
yield result
if result == last:
return
def product(*args, **kwds):
pools = [tuple(arg) for arg in args] * kwds.get('repeat', 1)
result = [[]]
for pool in pools:
result = [x + [y] for x in result for y in pool]
for prod in result:
yield tuple(prod)
|
