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The point of the progress meter is to let the user know that the task is progressing, and give them a chance to estimate when it will be complete. If the task completes in under 0.5 seconds then it is sufficiently fast enough that the user doesn't need to be kept up-to-date on its progress; in fact showing the meter may just slow the task down waiting on the tty to redraw. We now delay the progress meter 0.5 seconds (or 1 second if the Python time.time() function isn't accurate enough) to avoid any really fast tasks, like a no-op local sync. Signed-off-by: Shawn O. Pearce <sop@google.com>
75 lines
1.8 KiB
Python
75 lines
1.8 KiB
Python
#
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# Copyright (C) 2009 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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from time import time
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from trace import IsTrace
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class Progress(object):
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def __init__(self, title, total=0):
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self._title = title
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self._total = total
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self._done = 0
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self._lastp = -1
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self._start = time()
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self._show = False
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def update(self, inc=1):
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self._done += inc
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if IsTrace():
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return
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if not self._show:
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if 0.5 <= time() - self._start:
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self._show = True
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else:
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return
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if self._total <= 0:
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sys.stderr.write('\r%s: %d, ' % (
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self._title,
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self._done))
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sys.stderr.flush()
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else:
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p = (100 * self._done) / self._total
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if self._lastp != p:
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self._lastp = p
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sys.stderr.write('\r%s: %3d%% (%d/%d) ' % (
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self._title,
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p,
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self._done,
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self._total))
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sys.stderr.flush()
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def end(self):
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if IsTrace() or not self._show:
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return
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if self._total <= 0:
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sys.stderr.write('\r%s: %d, done. \n' % (
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self._title,
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self._done))
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sys.stderr.flush()
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else:
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p = (100 * self._done) / self._total
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sys.stderr.write('\r%s: %3d%% (%d/%d), done. \n' % (
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self._title,
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p,
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self._done,
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self._total))
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sys.stderr.flush()
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