[PATCH 8 of 8] py3: have bytes version of sys.argv

[Pulkit Goyal]

# HG changeset patch
# User Pulkit Goyal <7895pulkit at gmail.com>
# Date 1478387186 -19800
#      Sun Nov 06 04:36:26 2016 +0530
# Node ID b5fc4e71286dd4f33336e4f38e0b9fb17f51f1e3
# Parent  6eed3ee0df425da61d03bfe024dd082f3176ce5d
py3: have bytes version of sys.argv

sys.argv returns unicodes on Python 3. We need a bytes version for us.
There was also a python bug/feature request which wanted then to implement
one. They rejected and it is quoted in one of the comments that we can use
fsencode() to get a bytes version of sys.argv. Though not sure about its
correctness.

Link to the comment: http://bugs.python.org/issue8776#msg217416

After this patch we will have pycompat.sysargv which will return us bytes
version of sys.argv. If this patch goes in, i will like to make transformer
rewrite sys.argv with pycompat.argv because there are lot of occurences.

diff -r 6eed3ee0df42 -r b5fc4e71286d mercurial/pycompat.py
--- a/mercurial/pycompat.py	Sun Nov 06 04:17:19 2016 +0530
+++ b/mercurial/pycompat.py	Sun Nov 06 04:36:26 2016 +0530
@@ -41,6 +41,7 @@
     osname = os.name.encode('ascii')
     ospathsep = os.pathsep.encode('ascii')
     ossep = os.sep.encode('ascii')
+    sysargv = list(map(os.fsencode, sys.argv))
 
     def sysstr(s):
         """Return a keyword str to be passed to Python functions such as
@@ -89,6 +90,7 @@
     osname = os.name
     ospathsep = os.pathsep
     ossep = os.sep
+    sysargv = sys.argv
 
 stringio = io.StringIO
 empty = _queue.Empty