diff -r 44c4a38bf563 -r 0cb09c322647 mercurial/posix.py
--- a/mercurial/posix.py	Fri Feb 23 23:09:58 2018 +0900
+++ b/mercurial/posix.py	Wed Feb 21 22:20:27 2018 +0900
@@ -461,6 +461,10 @@
     else:
         return "'%s'" % s.replace("'", "'\\''")
 
+def shellsplit(s):
+    """Parse a command string in POSIX shell way (best-effort)"""
+    return pycompat.shlexsplit(s, posix=True)
+
 def quotecommand(cmd):
     return cmd