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dispatch: force \n for newlines on sys.std* streams (BC)...
dispatch: force \n for newlines on sys.std* streams (BC) The sys.std* streams behave differently on Python 3. On Python 3, these streams are an io.TextIOWrapper that wraps a binary buffer stored on a .buffer attribute. These TextIOWrapper instances normalize \n to os.linesep by default. On Windows, this means that \n is normalized to \r\n. So functions like print() which have an implicit end='\n' will actually emit \r\n for line endings. While most parts of Mercurial go through the ui.write() layer to print output, some code - notably in extensions and hooks - can use print(). If this code was using print() or otherwise writing to sys.std* on Windows, Mercurial would emit \r\n. In reality, pretty much everything on Windows reacts to \n just fine. Mercurial itself doesn't emit \r\n when going through the ui layer. Changing the sys.std* streams to not normalize line endings sounds like a scary change. But I think it is safe. It also makes Mercurial on Python 3 behave similarly to Python 2, which did not perform \r\n normalization in print() by default. .. bc:: sys.{stdout, stderr, stdin} now use \n line endings on Python 3 Differential Revision: https://phab.mercurial-scm.org/D8339

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scmposix.py
97 lines | 2.6 KiB | text/x-python | PythonLexer
from __future__ import absolute_import
import array
import errno
import fcntl
import os
import sys
from .pycompat import getattr
from . import (
encoding,
pycompat,
util,
)
# BSD 'more' escapes ANSI color sequences by default. This can be disabled by
# $MORE variable, but there's no compatible option with Linux 'more'. Given
# OS X is widely used and most modern Unix systems would have 'less', setting
# 'less' as the default seems reasonable.
fallbackpager = b'less'
def _rcfiles(path):
rcs = [os.path.join(path, b'hgrc')]
rcdir = os.path.join(path, b'hgrc.d')
try:
rcs.extend(
[
os.path.join(rcdir, f)
for f, kind in util.listdir(rcdir)
if f.endswith(b".rc")
]
)
except OSError:
pass
return rcs
def systemrcpath():
path = []
if pycompat.sysplatform == b'plan9':
root = b'lib/mercurial'
else:
root = b'etc/mercurial'
# old mod_python does not set sys.argv
if len(getattr(sys, 'argv', [])) > 0:
p = os.path.dirname(os.path.dirname(pycompat.sysargv[0]))
if p != b'/':
path.extend(_rcfiles(os.path.join(p, root)))
path.extend(_rcfiles(b'/' + root))
return path
def userrcpath():
if pycompat.sysplatform == b'plan9':
return [encoding.environ[b'home'] + b'/lib/hgrc']
elif pycompat.isdarwin:
return [os.path.expanduser(b'~/.hgrc')]
else:
confighome = encoding.environ.get(b'XDG_CONFIG_HOME')
if confighome is None or not os.path.isabs(confighome):
confighome = os.path.expanduser(b'~/.config')
return [
os.path.expanduser(b'~/.hgrc'),
os.path.join(confighome, b'hg', b'hgrc'),
]
def termsize(ui):
try:
import termios
TIOCGWINSZ = termios.TIOCGWINSZ # unavailable on IRIX (issue3449)
except (AttributeError, ImportError):
return 80, 24
for dev in (ui.ferr, ui.fout, ui.fin):
try:
try:
fd = dev.fileno()
except AttributeError:
continue
if not os.isatty(fd):
continue
arri = fcntl.ioctl(fd, TIOCGWINSZ, b'\0' * 8)
height, width = array.array('h', arri)[:2]
if width > 0 and height > 0:
return width, height
except ValueError:
pass
except IOError as e:
if e[0] == errno.EINVAL: # pytype: disable=unsupported-operands
pass
else:
raise
return 80, 24