utils.py 文件源码

def estimate_time(builds):
    """Update the working build with an estimated completion time.

    Takes a simple average over the previous builds, using those
    whose outcome is ``'passed'``.

    Arguments:
      builds (:py:class:`list`): All builds.

    """
    try:
        index, current = next(
            (index, build) for index, build in enumerate(builds[:4])
            if build['outcome'] == 'working'
        )
    except StopIteration:
        return  # no in-progress builds
    if current.get('started_at') is None:
        current['elapsed'] = 'estimate not available'
        return
    usable = [
        current for current in builds[index + 1:]
        if current['outcome'] == 'passed' and current['duration'] is not None
    ]
    if not usable:
        current['elapsed'] = 'estimate not available'
        return
    average_duration = int(sum(build['duration'] for build in usable) /
                           float(len(usable)))
    finish = current['started_at'] + average_duration
    remaining = (datetime.fromtimestamp(finish) -
                 datetime.now()).total_seconds()
    if remaining >= 0:
        current['elapsed'] = '{} left'.format(naturaldelta(remaining))
    else:
        current['elapsed'] = 'nearly done'