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progress.py
# Copyright (C) 2013-2016 Red Hat, Inc. # # This copyrighted material is made available to anyone wishing to use, # modify, copy, or redistribute it subject to the terms and conditions of # the GNU General Public License v.2, or (at your option) any later version. # This program is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY expressed or implied, including the implied warranties 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. Any Red Hat trademarks that are incorporated in the # source code or documentation are not subject to the GNU General Public # License and may only be used or replicated with the express permission of # Red Hat, Inc. from __future__ import unicode_literals from dnf.cli.format import format_number, format_time from dnf.cli.term import _term_width from dnf.pycomp import unicode from time import time import sys import dnf.callback import dnf.util class MultiFileProgressMeter(dnf.callback.DownloadProgress): """Multi-file download progress meter""" STATUS_2_STR = { dnf.callback.STATUS_FAILED: 'FAILED', dnf.callback.STATUS_ALREADY_EXISTS: 'SKIPPED', dnf.callback.STATUS_MIRROR: 'MIRROR', dnf.callback.STATUS_DRPM: 'DRPM', } def __init__(self, fo=sys.stderr, update_period=0.3, tick_period=1.0, rate_average=5.0): """Creates a new progress meter instance update_period -- how often to update the progress bar tick_period -- how fast to cycle through concurrent downloads rate_average -- time constant for average speed calculation """ self.fo = fo self.update_period = update_period self.tick_period = tick_period self.rate_average = rate_average self.unknown_progres = 0 self.total_drpm = 0 self.isatty = sys.stdout.isatty() self.done_drpm = 0 self.done_files = 0 self.done_size = 0 self.active = [] self.state = {} self.last_time = 0 self.last_size = 0 self.rate = None self.total_files = 0 self.total_size = 0 def message(self, msg): dnf.util._terminal_messenger('write_flush', msg, self.fo) def start(self, total_files, total_size, total_drpms=0): self.total_files = total_files self.total_size = total_size self.total_drpm = total_drpms # download state self.done_drpm = 0 self.done_files = 0 self.done_size = 0 self.active = [] self.state = {} # rate averaging self.last_time = 0 self.last_size = 0 self.rate = None def progress(self, payload, done): now = time() text = unicode(payload) total = int(payload.download_size) done = int(done) # update done_size if text not in self.state: self.state[text] = now, 0 self.active.append(text) start, old = self.state[text] self.state[text] = start, done self.done_size += done - old # update screen if enough time has elapsed if now - self.last_time > self.update_period: if total > self.total_size: self.total_size = total self._update(now) def _update(self, now): if self.last_time: delta_time = now - self.last_time delta_size = self.done_size - self.last_size if delta_time > 0 and delta_size > 0: # update the average rate rate = delta_size / delta_time if self.rate is not None: weight = min(delta_time/self.rate_average, 1) rate = rate*weight + self.rate*(1 - weight) self.rate = rate self.last_time = now self.last_size = self.done_size if not self.isatty: return # pick one of the active downloads text = self.active[int(now/self.tick_period) % len(self.active)] if self.total_files > 1: n = '%d' % (self.done_files + 1) if len(self.active) > 1: n += '-%d' % (self.done_files + len(self.active)) text = '(%s/%d): %s' % (n, self.total_files, text) # average rate, total done size, estimated remaining time if self.rate and self.total_size: time_eta = format_time((self.total_size - self.done_size) / self.rate) else: time_eta = '--:--' msg = ' %5sB/s | %5sB %9s ETA\r' % ( format_number(self.rate) if self.rate else '--- ', format_number(self.done_size), time_eta) left = _term_width() - len(msg) bl = (left - 7)//2 if bl > 8: # use part of the remaining space for progress bar if self.total_size: pct = self.done_size * 100 // self.total_size n, p = divmod(self.done_size * bl * 2 // self.total_size, 2) bar = '=' * n + '-' * p msg = '%3d%% [%-*s]%s' % (pct, bl, bar, msg) left -= bl + 7 else: n = self.unknown_progres - 3 p = 3 n = 0 if n < 0 else n bar = ' ' * n + '=' * p msg = ' [%-*s]%s' % (bl, bar, msg) left -= bl + 7 self.unknown_progres = self.unknown_progres + 3 if self.unknown_progres + 3 < bl \ else 0 self.message('%-*.*s%s' % (left, left, text, msg)) def end(self, payload, status, err_msg): start = now = time() text = unicode(payload) size = int(payload.download_size) done = 0 # update state if status == dnf.callback.STATUS_MIRROR: pass elif status == dnf.callback.STATUS_DRPM: self.done_drpm += 1 elif text in self.state: start, done = self.state.pop(text) self.active.remove(text) size -= done self.done_files += 1 self.done_size += size elif status == dnf.callback.STATUS_ALREADY_EXISTS: self.done_files += 1 self.done_size += size if status: # the error message, no trimming if status is dnf.callback.STATUS_DRPM and self.total_drpm > 1: msg = '[%s %d/%d] %s: ' % (self.STATUS_2_STR[status], self.done_drpm, self.total_drpm, text) else: msg = '[%s] %s: ' % (self.STATUS_2_STR[status], text) left = _term_width() - len(msg) - 1 msg = '%s%-*s\n' % (msg, left, err_msg) else: if self.total_files > 1: text = '(%d/%d): %s' % (self.done_files, self.total_files, text) # average rate, file size, download time tm = max(now - start, 0.001) msg = ' %5sB/s | %5sB %9s \n' % ( format_number(float(done) / tm), format_number(done), format_time(tm)) left = _term_width() - len(msg) msg = '%-*.*s%s' % (left, left, text, msg) self.message(msg) # now there's a blank line. fill it if possible. if self.active: self._update(now)
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