view contrib/memory.py @ 41297:b1ea90613af3 stable

revset: introduce an internal `_rev` predicate for '%d' usage

In 24a1f67bb75a, we aligned "%d" behavior on "%ld" one, invalid revisions got
silently ignored. However, soon after in 8aca89a694d4 and 26b0a7514f01, a side
effect changed the behavior of "%ld" to no longer silently filter invalid
revisions.

After discussion on the mailing list, it was decided to align on the new %ld
behavior:

https://www.mercurial-scm.org/pipermail/mercurial-devel/2019-January/127291.html

This changeset introduce a '_rev()' predicated that keep the benefit from
24a1f67bb75a while enforcing a more strict checking on the inputs.

# 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)