# progress.py show progress bars for some actions
#
# Copyright (C) 2010 Augie Fackler <durin42@gmail.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""show progress bars for some actions
This extension uses the progress information logged by hg commands
to draw progress bars that are as informative as possible. Some progress
bars only offer indeterminate information, while others have a definite
end point.
The following settings are available::
[progress]
delay = 3 # number of seconds (float) before showing the progress bar
refresh = 0.1 # time in seconds between refreshes of the progress bar
format = topic bar number # format of the progress bar
width = <none> # if set, the maximum width of the progress information
# (that is, min(width, term width) will be used)
clear-complete = True # clear the progress bar after it's done
disable = False # if true, don't show a progress bar
assume-tty = False # if true, ALWAYS show a progress bar, unless
# disable is given
Valid entries for the format field are topic, bar, number, unit, and
item. item defaults to the last 20 characters of the item, but this
can be changed by adding either ``-<num>`` which would take the last
num characters, or ``+<num>`` for the first num characters.
"""
import sys
import time
from mercurial import util
def spacejoin(*args):
return ' '.join(s for s in args if s)
def shouldprint(ui):
return sys.stderr.isatty() or ui.configbool('progress', 'assume-tty')
class progbar(object):
def __init__(self, ui):
self.ui = ui
self.resetstate()
def resetstate(self):
self.topics = []
self.printed = False
self.lastprint = time.time() + float(self.ui.config(
'progress', 'delay', default=3))
self.indetcount = 0
self.refresh = float(self.ui.config(
'progress', 'refresh', default=0.1))
self.order = self.ui.configlist(
'progress', 'format',
default=['topic', 'bar', 'number'])
def show(self, topic, pos, item, unit, total):
if not shouldprint(self.ui):
return
termwidth = self.width()
self.printed = True
head = ''
needprogress = False
tail = ''
for indicator in self.order:
add = ''
if indicator == 'topic':
add = topic
elif indicator == 'number':
if total:
add = ('% ' + str(len(str(total))) +
's/%s') % (pos, total)
else:
add = str(pos)
elif indicator.startswith('item') and item:
slice = 'end'
if '-' in indicator:
wid = int(indicator.split('-')[1])
elif '+' in indicator:
slice = 'beginning'
wid = int(indicator.split('+')[1])
else:
wid = 20
if slice == 'end':
add = item[-wid:]
else:
add = item[:wid]
add += (wid - len(add)) * ' '
elif indicator == 'bar':
add = ''
needprogress = True
elif indicator == 'unit' and unit:
add = unit
if not needprogress:
head = spacejoin(head, add)
else:
tail = spacejoin(add, tail)
if needprogress:
used = 0
if head:
used += len(head) + 1
if tail:
used += len(tail) + 1
progwidth = termwidth - used - 3
if total and pos <= total:
amt = pos * progwidth // total
bar = '=' * (amt - 1)
if amt > 0:
bar += '>'
bar += ' ' * (progwidth - amt)
else:
progwidth -= 3
self.indetcount += 1
# mod the count by twice the width so we can make the
# cursor bounce between the right and left sides
amt = self.indetcount % (2 * progwidth)
amt -= progwidth
bar = (' ' * int(progwidth - abs(amt)) + '<=>' +
' ' * int(abs(amt)))
prog = ''.join(('[', bar , ']'))
out = spacejoin(head, prog, tail)
else:
out = spacejoin(head, tail)
sys.stderr.write('\r' + out[:termwidth])
sys.stderr.flush()
def clear(self):
if not shouldprint(self.ui):
return
sys.stderr.write('\r%s\r' % (' ' * self.width()))
def complete(self):
if not shouldprint(self.ui):
return
if self.ui.configbool('progress', 'clear-complete', default=True):
self.clear()
else:
sys.stderr.write('\n')
sys.stderr.flush()
def width(self):
tw = util.termwidth()
return min(int(self.ui.config('progress', 'width', default=tw)), tw)
def progress(self, topic, pos, item='', unit='', total=None):
if pos is None:
if self.topics and self.topics[-1] == topic and self.printed:
self.complete()
self.resetstate()
else:
if topic not in self.topics:
self.topics.append(topic)
now = time.time()
if (now - self.lastprint >= self.refresh
and topic == self.topics[-1]):
self.lastprint = now
self.show(topic, pos, item, unit, total)
def uisetup(ui):
class progressui(ui.__class__):
_progbar = None
def progress(self, *args, **opts):
self._progbar.progress(*args, **opts)
return super(progressui, self).progress(*args, **opts)
def write(self, *args, **opts):
if self._progbar.printed:
self._progbar.clear()
return super(progressui, self).write(*args, **opts)
def write_err(self, *args, **opts):
if self._progbar.printed:
self._progbar.clear()
return super(progressui, self).write_err(*args, **opts)
# Apps that derive a class from ui.ui() can use
# setconfig('progress', 'disable', 'True') to disable this extension
if ui.configbool('progress', 'disable'):
return
if shouldprint(ui) and not ui.debugflag and not ui.quiet:
ui.__class__ = progressui
# we instantiate one globally shared progress bar to avoid
# competing progress bars when multiple UI objects get created
if not progressui._progbar:
progressui._progbar = progbar(ui)
def reposetup(ui, repo):
uisetup(repo.ui)