posix: give checklink a fast path that cache the check file and is read only
util.checklink would create a symlink and remove it again. That would sometimes
happen multiple times. Write operations are relatively expensive and give disk
tear and noise for applications monitoring file system activity.
Instead of creating a symlink and deleting it again, just create it once and
leave it in .hg/cache/check-link . If the file exists, just verify that
os.islink reports true. We will assume that this check is as good as symlink
creation not failing.
Note: The symlink left in .hg/cache has to resolve to a file - otherwise 'make
dist' will fail ...
test-symlink-os-yes-fs-no.py does some monkey patching to simulate a platform
without symlink support. The slightly different testing method requires
additional monkeying.
# churn.py - create a graph of revisions count grouped by template
#
# Copyright 2006 Josef "Jeff" Sipek <jeffpc@josefsipek.net>
# Copyright 2008 Alexander Solovyov <piranha@piranha.org.ua>
#
# 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 display statistics about repository history'''
from __future__ import absolute_import
import datetime
import os
import time
from mercurial.i18n import _
from mercurial import (
cmdutil,
commands,
encoding,
patch,
scmutil,
util,
)
cmdtable = {}
command = cmdutil.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 = 'ships-with-hg-core'
def maketemplater(ui, repo, tmpl):
return cmdutil.changeset_templater(ui, repo, False, None, tmpl, None, False)
def changedlines(ui, repo, ctx1, ctx2, fns):
added, removed = 0, 0
fmatch = scmutil.matchfiles(repo, fns)
diff = ''.join(patch.diff(repo, ctx1.node(), ctx2.node(), fmatch))
for l in diff.split('\n'):
if l.startswith("+") and not l.startswith("+++ "):
added += 1
elif l.startswith("-") and not l.startswith("--- "):
removed += 1
return (added, removed)
def countrate(ui, repo, amap, *pats, **opts):
"""Calculate stats"""
if opts.get('dateformat'):
def getkey(ctx):
t, tz = ctx.date()
date = datetime.datetime(*time.gmtime(float(t) - tz)[:6])
return date.strftime(opts['dateformat'])
else:
tmpl = opts.get('oldtemplate') or opts.get('template')
tmpl = maketemplater(ui, repo, tmpl)
def getkey(ctx):
ui.pushbuffer()
tmpl.show(ctx)
return ui.popbuffer()
state = {'count': 0}
rate = {}
df = False
if opts.get('date'):
df = util.matchdate(opts['date'])
m = scmutil.match(repo[None], pats, opts)
def prep(ctx, fns):
rev = ctx.rev()
if df and not df(ctx.date()[0]): # doesn't match date format
return
key = getkey(ctx).strip()
key = amap.get(key, key) # alias remap
if opts.get('changesets'):
rate[key] = (rate.get(key, (0,))[0] + 1, 0)
else:
parents = ctx.parents()
if len(parents) > 1:
ui.note(_('revision %d is a merge, ignoring...\n') % (rev,))
return
ctx1 = parents[0]
lines = changedlines(ui, repo, ctx1, ctx, fns)
rate[key] = [r + l for r, l in zip(rate.get(key, (0, 0)), lines)]
state['count'] += 1
ui.progress(_('analyzing'), state['count'], total=len(repo),
unit=_('revisions'))
for ctx in cmdutil.walkchangerevs(repo, m, opts, prep):
continue
ui.progress(_('analyzing'), None)
return rate
@command('churn',
[('r', 'rev', [],
_('count rate for the specified revision or revset'), _('REV')),
('d', 'date', '',
_('count rate for revisions matching date spec'), _('DATE')),
('t', 'oldtemplate', '',
_('template to group changesets (DEPRECATED)'), _('TEMPLATE')),
('T', 'template', '{author|email}',
_('template to group changesets'), _('TEMPLATE')),
('f', 'dateformat', '',
_('strftime-compatible format for grouping by date'), _('FORMAT')),
('c', 'changesets', False, _('count rate by number of changesets')),
('s', 'sort', False, _('sort by key (default: sort by count)')),
('', 'diffstat', False, _('display added/removed lines separately')),
('', 'aliases', '', _('file with email aliases'), _('FILE')),
] + commands.walkopts,
_("hg churn [-d DATE] [-r REV] [--aliases FILE] [FILE]"),
inferrepo=True)
def churn(ui, repo, *pats, **opts):
'''histogram of changes to the repository
This command will display a histogram representing the number
of changed lines or revisions, grouped according to the given
template. The default template will group changes by author.
The --dateformat option may be used to group the results by
date instead.
Statistics are based on the number of changed lines, or
alternatively the number of matching revisions if the
--changesets option is specified.
Examples::
# display count of changed lines for every committer
hg churn -t "{author|email}"
# display daily activity graph
hg churn -f "%H" -s -c
# display activity of developers by month
hg churn -f "%Y-%m" -s -c
# display count of lines changed in every year
hg churn -f "%Y" -s
It is possible to map alternate email addresses to a main address
by providing a file using the following format::
<alias email> = <actual email>
Such a file may be specified with the --aliases option, otherwise
a .hgchurn file will be looked for in the working directory root.
Aliases will be split from the rightmost "=".
'''
def pad(s, l):
return s + " " * (l - encoding.colwidth(s))
amap = {}
aliases = opts.get('aliases')
if not aliases and os.path.exists(repo.wjoin('.hgchurn')):
aliases = repo.wjoin('.hgchurn')
if aliases:
for l in open(aliases, "r"):
try:
alias, actual = l.rsplit('=' in l and '=' or None, 1)
amap[alias.strip()] = actual.strip()
except ValueError:
l = l.strip()
if l:
ui.warn(_("skipping malformed alias: %s\n") % l)
continue
rate = countrate(ui, repo, amap, *pats, **opts).items()
if not rate:
return
if opts.get('sort'):
rate.sort()
else:
rate.sort(key=lambda x: (-sum(x[1]), x))
# Be careful not to have a zero maxcount (issue833)
maxcount = float(max(sum(v) for k, v in rate)) or 1.0
maxname = max(len(k) for k, v in rate)
ttywidth = ui.termwidth()
ui.debug("assuming %i character terminal\n" % ttywidth)
width = ttywidth - maxname - 2 - 2 - 2
if opts.get('diffstat'):
width -= 15
def format(name, diffstat):
added, removed = diffstat
return "%s %15s %s%s\n" % (pad(name, maxname),
'+%d/-%d' % (added, removed),
ui.label('+' * charnum(added),
'diffstat.inserted'),
ui.label('-' * charnum(removed),
'diffstat.deleted'))
else:
width -= 6
def format(name, count):
return "%s %6d %s\n" % (pad(name, maxname), sum(count),
'*' * charnum(sum(count)))
def charnum(count):
return int(round(count * width / maxcount))
for name, count in rate:
ui.write(format(name, count))