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# progress.py progress bars related code
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#
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# Copyright (C) 2010 Augie Fackler <durin42@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import errno
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import threading
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import time
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from .i18n import _
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from . import encoding
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def spacejoin(*args):
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return b' '.join(s for s in args if s)
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def shouldprint(ui):
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return not (ui.quiet or ui.plain(b'progress')) and (
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ui._isatty(ui.ferr) or ui.configbool(b'progress', b'assume-tty')
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)
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def fmtremaining(seconds):
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"""format a number of remaining seconds in human readable way
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This will properly display seconds, minutes, hours, days if needed"""
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if seconds < 60:
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# i18n: format XX seconds as "XXs"
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return _(b"%02ds") % seconds
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minutes = seconds // 60
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if minutes < 60:
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seconds -= minutes * 60
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# i18n: format X minutes and YY seconds as "XmYYs"
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return _(b"%dm%02ds") % (minutes, seconds)
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# we're going to ignore seconds in this case
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minutes += 1
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hours = minutes // 60
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minutes -= hours * 60
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if hours < 30:
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# i18n: format X hours and YY minutes as "XhYYm"
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return _(b"%dh%02dm") % (hours, minutes)
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# we're going to ignore minutes in this case
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hours += 1
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days = hours // 24
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hours -= days * 24
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if days < 15:
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# i18n: format X days and YY hours as "XdYYh"
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return _(b"%dd%02dh") % (days, hours)
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# we're going to ignore hours in this case
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days += 1
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weeks = days // 7
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days -= weeks * 7
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if weeks < 55:
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# i18n: format X weeks and YY days as "XwYYd"
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return _(b"%dw%02dd") % (weeks, days)
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# we're going to ignore days and treat a year as 52 weeks
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weeks += 1
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years = weeks // 52
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weeks -= years * 52
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# i18n: format X years and YY weeks as "XyYYw"
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return _(b"%dy%02dw") % (years, weeks)
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# file_write() and file_flush() of Python 2 do not restart on EINTR if
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# the file is attached to a "slow" device (e.g. a terminal) and raise
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# IOError. We cannot know how many bytes would be written by file_write(),
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# but a progress text is known to be short enough to be written by a
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# single write() syscall, so we can just retry file_write() with the whole
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# text. (issue5532)
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#
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# This should be a short-term workaround. We'll need to fix every occurrence
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# of write() to a terminal or pipe.
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def _eintrretry(func, *args):
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while True:
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try:
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return func(*args)
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except IOError as err:
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if err.errno == errno.EINTR:
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continue
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raise
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class progbar(object):
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def __init__(self, ui):
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self.ui = ui
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self._refreshlock = threading.Lock()
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self.resetstate()
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def resetstate(self):
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self.topics = []
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self.topicstates = {}
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self.starttimes = {}
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self.startvals = {}
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self.printed = False
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self.lastprint = time.time() + float(
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self.ui.config(b'progress', b'delay')
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)
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self.curtopic = None
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self.lasttopic = None
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self.indetcount = 0
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self.refresh = float(self.ui.config(b'progress', b'refresh'))
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self.changedelay = max(
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3 * self.refresh, float(self.ui.config(b'progress', b'changedelay'))
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)
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self.order = self.ui.configlist(b'progress', b'format')
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self.estimateinterval = self.ui.configwith(
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float, b'progress', b'estimateinterval'
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)
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def show(self, now, topic, pos, item, unit, total):
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if not shouldprint(self.ui):
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return
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termwidth = self.width()
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self.printed = True
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head = b''
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needprogress = False
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tail = b''
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for indicator in self.order:
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add = b''
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if indicator == b'topic':
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add = topic
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elif indicator == b'number':
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if total:
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add = b'%*d/%d' % (len(str(total)), pos, total)
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else:
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add = b'%d' % pos
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elif indicator.startswith(b'item') and item:
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slice = b'end'
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if b'-' in indicator:
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wid = int(indicator.split(b'-')[1])
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elif b'+' in indicator:
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slice = b'beginning'
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wid = int(indicator.split(b'+')[1])
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else:
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wid = 20
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if slice == b'end':
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add = encoding.trim(item, wid, leftside=True)
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else:
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add = encoding.trim(item, wid)
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add += (wid - encoding.colwidth(add)) * b' '
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elif indicator == b'bar':
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add = b''
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needprogress = True
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elif indicator == b'unit' and unit:
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add = unit
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elif indicator == b'estimate':
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add = self.estimate(topic, pos, total, now)
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elif indicator == b'speed':
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add = self.speed(topic, pos, unit, now)
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if not needprogress:
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head = spacejoin(head, add)
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else:
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tail = spacejoin(tail, add)
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if needprogress:
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used = 0
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if head:
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used += encoding.colwidth(head) + 1
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if tail:
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used += encoding.colwidth(tail) + 1
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progwidth = termwidth - used - 3
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if total and pos <= total:
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amt = pos * progwidth // total
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bar = b'=' * (amt - 1)
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if amt > 0:
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bar += b'>'
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bar += b' ' * (progwidth - amt)
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else:
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progwidth -= 3
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self.indetcount += 1
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# mod the count by twice the width so we can make the
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# cursor bounce between the right and left sides
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amt = self.indetcount % (2 * progwidth)
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amt -= progwidth
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bar = (
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b' ' * int(progwidth - abs(amt))
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+ b'<=>'
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+ b' ' * int(abs(amt))
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)
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prog = b''.join((b'[', bar, b']'))
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out = spacejoin(head, prog, tail)
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else:
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out = spacejoin(head, tail)
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self._writeerr(b'\r' + encoding.trim(out, termwidth))
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self.lasttopic = topic
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self._flusherr()
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def clear(self):
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if not self.printed or not self.lastprint or not shouldprint(self.ui):
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return
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self._writeerr(b'\r%s\r' % (b' ' * self.width()))
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self._flusherr()
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if self.printed:
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# force immediate re-paint of progress bar
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self.lastprint = 0
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def complete(self):
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if not shouldprint(self.ui):
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return
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if self.ui.configbool(b'progress', b'clear-complete'):
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self.clear()
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else:
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self._writeerr(b'\n')
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self._flusherr()
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def _flusherr(self):
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_eintrretry(self.ui.ferr.flush)
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def _writeerr(self, msg):
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_eintrretry(self.ui.ferr.write, msg)
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def width(self):
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tw = self.ui.termwidth()
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return min(int(self.ui.config(b'progress', b'width', default=tw)), tw)
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def estimate(self, topic, pos, total, now):
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if total is None:
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return b''
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initialpos = self.startvals[topic]
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target = total - initialpos
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delta = pos - initialpos
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if delta > 0:
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elapsed = now - self.starttimes[topic]
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seconds = (elapsed * (target - delta)) // delta + 1
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return fmtremaining(seconds)
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return b''
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def speed(self, topic, pos, unit, now):
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initialpos = self.startvals[topic]
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delta = pos - initialpos
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elapsed = now - self.starttimes[topic]
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if elapsed > 0:
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return _(b'%d %s/sec') % (delta / elapsed, unit)
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return b''
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def _oktoprint(self, now):
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'''Check if conditions are met to print - e.g. changedelay elapsed'''
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if (
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self.lasttopic is None # first time we printed
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# not a topic change
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or self.curtopic == self.lasttopic
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# it's been long enough we should print anyway
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or now - self.lastprint >= self.changedelay
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):
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return True
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else:
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return False
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def _calibrateestimate(self, topic, now, pos):
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'''Adjust starttimes and startvals for topic so ETA works better
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If progress is non-linear (ex. get much slower in the last minute),
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it's more friendly to only use a recent time span for ETA and speed
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calculation.
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[======================================> ]
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^^^^^^^
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estimateinterval, only use this for estimation
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'''
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interval = self.estimateinterval
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if interval <= 0:
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return
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elapsed = now - self.starttimes[topic]
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if elapsed > interval:
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delta = pos - self.startvals[topic]
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newdelta = delta * interval / elapsed
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# If a stall happens temporarily, ETA could change dramatically
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# frequently. This is to avoid such dramatical change and make ETA
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# smoother.
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if newdelta < 0.1:
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return
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self.startvals[topic] = pos - newdelta
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self.starttimes[topic] = now - interval
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def progress(self, topic, pos, item=b'', unit=b'', total=None):
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if pos is None:
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self.closetopic(topic)
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return
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now = time.time()
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with self._refreshlock:
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if topic not in self.topics:
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self.starttimes[topic] = now
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self.startvals[topic] = pos
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self.topics.append(topic)
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self.topicstates[topic] = pos, item, unit, total
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self.curtopic = topic
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self._calibrateestimate(topic, now, pos)
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if now - self.lastprint >= self.refresh and self.topics:
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if self._oktoprint(now):
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self.lastprint = now
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self.show(now, topic, *self.topicstates[topic])
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def closetopic(self, topic):
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with self._refreshlock:
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self.starttimes.pop(topic, None)
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self.startvals.pop(topic, None)
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self.topicstates.pop(topic, None)
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# reset the progress bar if this is the outermost topic
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if self.topics and self.topics[0] == topic and self.printed:
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self.complete()
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self.resetstate()
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# truncate the list of topics assuming all topics within
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# this one are also closed
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if topic in self.topics:
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self.topics = self.topics[: self.topics.index(topic)]
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# reset the last topic to the one we just unwound to,
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# so that higher-level topics will be stickier than
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# lower-level topics
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if self.topics:
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self.lasttopic = self.topics[-1]
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else:
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self.lasttopic = None
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