You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
42 lines
1.3 KiB
42 lines
1.3 KiB
# The following comment should be removed at some point in the future.
|
|
# mypy: strict-optional=False
|
|
|
|
import codecs
|
|
import locale
|
|
import re
|
|
import sys
|
|
|
|
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
|
|
|
|
if MYPY_CHECK_RUNNING:
|
|
from typing import List, Tuple, Text
|
|
|
|
BOMS = [
|
|
(codecs.BOM_UTF8, 'utf-8'),
|
|
(codecs.BOM_UTF16, 'utf-16'),
|
|
(codecs.BOM_UTF16_BE, 'utf-16-be'),
|
|
(codecs.BOM_UTF16_LE, 'utf-16-le'),
|
|
(codecs.BOM_UTF32, 'utf-32'),
|
|
(codecs.BOM_UTF32_BE, 'utf-32-be'),
|
|
(codecs.BOM_UTF32_LE, 'utf-32-le'),
|
|
] # type: List[Tuple[bytes, Text]]
|
|
|
|
ENCODING_RE = re.compile(br'coding[:=]\s*([-\w.]+)')
|
|
|
|
|
|
def auto_decode(data):
|
|
# type: (bytes) -> Text
|
|
"""Check a bytes string for a BOM to correctly detect the encoding
|
|
|
|
Fallback to locale.getpreferredencoding(False) like open() on Python3"""
|
|
for bom, encoding in BOMS:
|
|
if data.startswith(bom):
|
|
return data[len(bom):].decode(encoding)
|
|
# Lets check the first two lines as in PEP263
|
|
for line in data.split(b'\n')[:2]:
|
|
if line[0:1] == b'#' and ENCODING_RE.search(line):
|
|
encoding = ENCODING_RE.search(line).groups()[0].decode('ascii')
|
|
return data.decode(encoding)
|
|
return data.decode(
|
|
locale.getpreferredencoding(False) or sys.getdefaultencoding(),
|
|
)
|
|
|