--- a/mercurial/util.py Thu Jun 25 03:46:07 2020 +0200
+++ b/mercurial/util.py Sun Jun 28 18:02:45 2020 +0200
@@ -22,6 +22,7 @@
import gc
import hashlib
import itertools
+import locale
import mmap
import os
import platform as pyplatform
@@ -3626,3 +3627,32 @@
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