mercurial-scm/hg-stable: mercurial/util.py comparison

merge with stable

comparison

equal deleted inserted replaced

-:f2dc337117b9
+:4a503c1b664a
 import contextlib
 import errno
 import gc
 import hashlib
 import itertools
+import locale
 import mmap
 import os
 import platform as pyplatform
 import re as remod
 import shutil
 byte = ord(readexactly(fh, 1))
 result |= (byte & 0x7F) << shift
 if not (byte & 0x80):
 return result
 shift += 7
+# Passing the '' locale means that the locale should be set according to the
+# user settings (environment variables).
+# Python sometimes avoids setting the global locale settings. When interfacing
+# with C code (e.g. the curses module or the Subversion bindings), the global
+# locale settings must be initialized correctly. Python 2 does not initialize
+# the global locale settings on interpreter startup. Python 3 sometimes
+# initializes LC_CTYPE, but not consistently at least on Windows. Therefore we
+# explicitly initialize it to get consistent behavior if it's not already
+# initialized. Since CPython commit 177d921c8c03d30daa32994362023f777624b10d,
+# LC_CTYPE is always initialized. If we require Python 3.8+, we should re-check
+# if we can remove this code.
+@contextlib.contextmanager
+def with_lc_ctype():
+oldloc = locale.setlocale(locale.LC_CTYPE, None)
+if oldloc == 'C':
+try:
+try:
+locale.setlocale(locale.LC_CTYPE, '')
+except locale.Error:
+# The likely case is that the locale from the environment
+# variables is unknown.
+pass
+yield
+finally:
+locale.setlocale(locale.LC_CTYPE, oldloc)
+else:
+yield

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