contrib/memory.py

tests: alter email `From` line to a value that's consistently parsed

Python2:
>>> email.header.decode_header('=?UTF-8?q?Rapha=C3=ABl=20Hertzog?= <[e-mail]>')
[('Rapha\xc3\xabl Hertzog', 'utf-8'), ('<[e-mail]>', None)]

Python3:
>>> email.header.decode_header('=?UTF-8?q?Rapha=C3=ABl=20Hertzog?= <[e-mail]>')
[(b'Rapha\xc3\xabl Hertzog', 'utf-8'), (b' <[e-mail]>', None)]

So alter the input to an input that parses to the same result
consistently. After skimming the relevant RFC (1342), I'm not sure if
what we had was valid, or how I could modify it to be more consistent.

Differential Revision: https://phab.mercurial-scm.org/D5769

# memory.py - track memory usage
#
# Copyright 2009 Matt Mackall <[e-mail]> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''helper extension to measure memory usage

Reads current and peak memory usage from ``/proc/self/status`` and
prints it to ``stderr`` on exit.
'''

from __future__ import absolute_import

def memusage(ui):
    """Report memory usage of the current process."""
    result = {'peak': 0, 'rss': 0}
    with open('/proc/self/status', 'r') as status:
        # This will only work on systems with a /proc file system
        # (like Linux).
        for line in status:
            parts = line.split()
            key = parts[0][2:-1].lower()
            if key in result:
                result[key] = int(parts[1])
    ui.write_err(", ".join(["%s: %.1f MiB" % (k, v / 1024.0)
                            for k, v in result.iteritems()]) + "\n")

def extsetup(ui):
    ui.atexit(memusage, ui)