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"""
BitBake progress handling code
"""
# Copyright (C) 2016 Intel Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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.
import sys
import re
import time
import inspect
import bb.event
import bb.build
class ProgressHandler(object):
"""
Base class that can pretend to be a file object well enough to be
used to build objects to intercept console output and determine the
progress of some operation.
"""
def __init__(self, d, outfile=None):
self._progress = 0
self._data = d
self._lastevent = 0
if outfile:
self._outfile = outfile
else:
self._outfile = sys.stdout
def _fire_progress(self, taskprogress, rate=None):
"""Internal function to fire the progress event"""
bb.event.fire(bb.build.TaskProgress(taskprogress, rate), self._data)
def write(self, string):
self._outfile.write(string)
def flush(self):
self._outfile.flush()
def update(self, progress, rate=None):
ts = time.time()
if progress > 100:
progress = 100
if progress != self._progress or self._lastevent + 1 < ts:
self._fire_progress(progress, rate)
self._lastevent = ts
self._progress = progress
class BasicProgressHandler(ProgressHandler):
def __init__(self, d, regex=r'(\d+)%', outfile=None):
super(BasicProgressHandler, self).__init__(d, outfile)
self._regex = re.compile(regex)
# Send an initial progress event so the bar gets shown
self._fire_progress(0)
def write(self, string):
percs = self._regex.findall(string)
if percs:
progress = int(percs[-1])
self.update(progress)
super(BasicProgressHandler, self).write(string)
class OutOfProgressHandler(ProgressHandler):
def __init__(self, d, regex, outfile=None):
super(OutOfProgressHandler, self).__init__(d, outfile)
self._regex = re.compile(regex)
# Send an initial progress event so the bar gets shown
self._fire_progress(0)
def write(self, string):
nums = self._regex.findall(string)
if nums:
progress = (float(nums[-1][0]) / float(nums[-1][1])) * 100
self.update(progress)
super(OutOfProgressHandler, self).write(string)
class MultiStageProgressReporter(object):
"""
Class which allows reporting progress without the caller
having to know where they are in the overall sequence. Useful
for tasks made up of python code spread across multiple
classes / functions - the progress reporter object can
be passed around or stored at the object level and calls
to next_stage() and update() made whereever needed.
"""
def __init__(self, d, stage_weights, debug=False):
"""
Initialise the progress reporter.
Parameters:
* d: the datastore (needed for firing the events)
* stage_weights: a list of weight values, one for each stage.
The value is scaled internally so you only need to specify
values relative to other values in the list, so if there
are two stages and the first takes 2s and the second takes
10s you would specify [2, 10] (or [1, 5], it doesn't matter).
* debug: specify True (and ensure you call finish() at the end)
in order to show a printout of the calculated stage weights
based on timing each stage. Use this to determine what the
weights should be when you're not sure.
"""
self._data = d
total = sum(stage_weights)
self._stage_weights = [float(x)/total for x in stage_weights]
self._stage = -1
self._base_progress = 0
# Send an initial progress event so the bar gets shown
self._fire_progress(0)
self._debug = debug
self._finished = False
if self._debug:
self._last_time = time.time()
self._stage_times = []
self._stage_total = None
self._callers = []
def _fire_progress(self, taskprogress):
bb.event.fire(bb.build.TaskProgress(taskprogress), self._data)
def next_stage(self, stage_total=None):
"""
Move to the next stage.
Parameters:
* stage_total: optional total for progress within the stage,
see update() for details
NOTE: you need to call this before the first stage.
"""
self._stage += 1
self._stage_total = stage_total
if self._stage == 0:
# First stage
if self._debug:
self._last_time = time.time()
else:
if self._stage < len(self._stage_weights):
self._base_progress = sum(self._stage_weights[:self._stage]) * 100
if self._debug:
currtime = time.time()
self._stage_times.append(currtime - self._last_time)
self._last_time = currtime
self._callers.append(inspect.getouterframes(inspect.currentframe())[1])
elif not self._debug:
bb.warn('ProgressReporter: current stage beyond declared number of stages')
self._base_progress = 100
self._fire_progress(self._base_progress)
def update(self, stage_progress):
"""
Update progress within the current stage.
Parameters:
* stage_progress: progress value within the stage. If stage_total
was specified when next_stage() was last called, then this
value is considered to be out of stage_total, otherwise it should
be a percentage value from 0 to 100.
"""
if self._stage_total:
stage_progress = (float(stage_progress) / self._stage_total) * 100
if self._stage < 0:
bb.warn('ProgressReporter: update called before first call to next_stage()')
elif self._stage < len(self._stage_weights):
progress = self._base_progress + (stage_progress * self._stage_weights[self._stage])
else:
progress = self._base_progress
if progress > 100:
progress = 100
self._fire_progress(progress)
def finish(self):
if self._finished:
return
self._finished = True
if self._debug:
import math
self._stage_times.append(time.time() - self._last_time)
mintime = max(min(self._stage_times), 0.01)
self._callers.append(None)
stage_weights = [int(math.ceil(x / mintime)) for x in self._stage_times]
bb.warn('Stage weights: %s' % stage_weights)
out = []
for stage_weight, caller in zip(stage_weights, self._callers):
if caller:
out.append('Up to %s:%d: %d' % (caller[1], caller[2], stage_weight))
else:
out.append('Up to finish: %d' % stage_weight)
bb.warn('Stage times:\n %s' % '\n '.join(out))
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