view hgext/graphlog.py @ 49442:816236523765

bisect: avoid adding irrelevant revisions to bisect state

When adding new revisions to the bisect state, it only makes sense to add
information about revisions that are under consideration (i.e., those that are
topologically between the known good and bad revisions). However, if the user
passes in a revset (e.g., '!merge()' to exclude merge commits), hg will resolve
the revset first and add all matching revisions to the bisect state (which in
this case would likely be the majority of revisions in the repo). To avoid this,
revisions should only be added to the bisect state if they are between the good
and bad revisions (and therefore relevant to the bisection).

--

Here are the results of some performance tests using the `mozilla-central` repo
(since it is one of the largest freely-available hg repositories in the wild).
These tests compare the performance of a locally-built `hg` before and after
application of this series. Note that `--noupdate` is passed to avoid including
update time (which should not vary across cases).

Setup (run between each test):
  $ hg bisect --reset
  $ hg bisect --noupdate --bad 56c3ad4bde5c70714b784ccf15d099e0df0f5bde
  $ hg bisect --noupdate --good 57426696adaf08298af3027fa77486fee0633b13

Test using a revset that returns a very large number of revisions:
  $ time hg bisect --noupdate --skip '!merge()' > /dev/null

Before:
  real    0m9.398s
  user    0m9.233s
  sys     0m0.120s

After:
  real    0m1.513s
  user    0m1.425s
  sys     0m0.052s

Test using a revset that is expensive to compute:
  $ time hg bisect --noupdate --skip 'desc("Bug")' > /dev/null

Before:
  real    0m49.853s
  user    0m49.580s
  sys     0m0.243s

After:
  real    0m4.120s
  user    0m4.036s
  sys     0m0.048s

# ASCII graph log extension for Mercurial
#
# Copyright 2007 Joel Rosdahl <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''command to view revision graphs from a shell (DEPRECATED)

The functionality of this extension has been include in core Mercurial
since version 2.3. Please use :hg:`log -G ...` instead.

This extension adds a --graph option to the incoming, outgoing and log
commands. When this options is given, an ASCII representation of the
revision graph is also shown.
'''


from mercurial.i18n import _
from mercurial import (
    cmdutil,
    commands,
    registrar,
)

cmdtable = {}
command = registrar.command(cmdtable)
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = b'ships-with-hg-core'


@command(
    b'glog',
    [
        (
            b'f',
            b'follow',
            None,
            _(
                b'follow changeset history, or file history across copies and renames'
            ),
        ),
        (
            b'',
            b'follow-first',
            None,
            _(b'only follow the first parent of merge changesets (DEPRECATED)'),
        ),
        (
            b'd',
            b'date',
            b'',
            _(b'show revisions matching date spec'),
            _(b'DATE'),
        ),
        (b'C', b'copies', None, _(b'show copied files')),
        (
            b'k',
            b'keyword',
            [],
            _(b'do case-insensitive search for a given text'),
            _(b'TEXT'),
        ),
        (
            b'r',
            b'rev',
            [],
            _(b'show the specified revision or revset'),
            _(b'REV'),
        ),
        (
            b'',
            b'removed',
            None,
            _(b'include revisions where files were removed'),
        ),
        (b'm', b'only-merges', None, _(b'show only merges (DEPRECATED)')),
        (b'u', b'user', [], _(b'revisions committed by user'), _(b'USER')),
        (
            b'',
            b'only-branch',
            [],
            _(
                b'show only changesets within the given named branch (DEPRECATED)'
            ),
            _(b'BRANCH'),
        ),
        (
            b'b',
            b'branch',
            [],
            _(b'show changesets within the given named branch'),
            _(b'BRANCH'),
        ),
        (
            b'P',
            b'prune',
            [],
            _(b'do not display revision or any of its ancestors'),
            _(b'REV'),
        ),
    ]
    + cmdutil.logopts
    + cmdutil.walkopts,
    _(b'[OPTION]... [FILE]'),
    helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
    inferrepo=True,
)
def glog(ui, repo, *pats, **opts):
    """show revision history alongside an ASCII revision graph

    Print a revision history alongside a revision graph drawn with
    ASCII characters.

    Nodes printed as an @ character are parents of the working
    directory.

    This is an alias to :hg:`log -G`.
    """
    opts['graph'] = True
    return commands.log(ui, repo, *pats, **opts)