Added 'git-retry' bootstrap
Added the 'git-retry' bootstrap command. This can be used to wrap other 'git' commands around a fault-tolerant retry wrapper. BUG=295109 TEST=localtest R=iannucci@chromium.org, petermayo@chromium.org Review URL: https://codereview.chromium.org/401673003 git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@285939 0039d316-1c4b-4281-b951-d872f2087c98changes/01/332501/1
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#!/usr/bin/env bash
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# Copyright 2014 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# git_freezer.py freeze -- a git-command to suspend all existing working
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# directory modifications. This can be reversed with the 'git thaw' command.
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SCRIPT=git_retry.py
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set -- retry "$@"
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. $(type -P python_git_runner.sh)
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#!/usr/bin/env python
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# Copyright 2014 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import logging
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import optparse
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import subprocess
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import sys
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import threading
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import time
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from git_common import GIT_EXE, GIT_TRANSIENT_ERRORS_RE
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class TeeThread(threading.Thread):
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def __init__(self, fd, out_fd, name):
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super(TeeThread, self).__init__(name='git-retry.tee.%s' % (name,))
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self.data = None
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self.fd = fd
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self.out_fd = out_fd
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def run(self):
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chunks = []
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for line in self.fd:
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chunks.append(line)
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self.out_fd.write(line)
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self.data = ''.join(chunks)
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class GitRetry(object):
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logger = logging.getLogger('git-retry')
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DEFAULT_DELAY_SECS = 3.0
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DEFAULT_RETRY_COUNT = 5
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def __init__(self, retry_count=None, delay=None, delay_factor=None):
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self.retry_count = retry_count or self.DEFAULT_RETRY_COUNT
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self.delay = max(delay, 0) if delay else 0
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self.delay_factor = max(delay_factor, 0) if delay_factor else 0
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def shouldRetry(self, stderr):
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m = GIT_TRANSIENT_ERRORS_RE.search(stderr)
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if not m:
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return False
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self.logger.info("Encountered known transient error: [%s]",
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stderr[m.start(): m.end()])
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return True
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@staticmethod
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def execute(*args):
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args = (GIT_EXE,) + args
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proc = subprocess.Popen(
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args,
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stderr=subprocess.PIPE,
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)
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stderr_tee = TeeThread(proc.stderr, sys.stderr, 'stderr')
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# Start our process. Collect/tee 'stdout' and 'stderr'.
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stderr_tee.start()
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try:
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proc.wait()
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except KeyboardInterrupt:
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proc.kill()
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raise
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finally:
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stderr_tee.join()
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return proc.returncode, None, stderr_tee.data
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def computeDelay(self, iteration):
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"""Returns: the delay (in seconds) for a given iteration
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The first iteration has a delay of '0'.
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Args:
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iteration: (int) The iteration index (starting with zero as the first
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iteration)
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"""
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if (not self.delay) or (iteration == 0):
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return 0
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if self.delay_factor == 0:
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# Linear delay
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return iteration * self.delay
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# Exponential delay
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return (self.delay_factor ** (iteration - 1)) * self.delay
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def __call__(self, *args):
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returncode = 0
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for i in xrange(self.retry_count):
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# If the previous run failed and a delay is configured, delay before the
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# next run.
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delay = self.computeDelay(i)
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if delay > 0:
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self.logger.info("Delaying for [%s second(s)] until next retry", delay)
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time.sleep(delay)
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self.logger.debug("Executing subprocess (%d/%d) with arguments: %s",
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(i+1), self.retry_count, args)
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returncode, _, stderr = self.execute(*args)
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self.logger.debug("Process terminated with return code: %d", returncode)
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if returncode == 0:
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break
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if not self.shouldRetry(stderr):
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self.logger.error("Process failure was not known to be transient; "
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"terminating with return code %d", returncode)
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break
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return returncode
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def main(args):
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parser = optparse.OptionParser()
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parser.disable_interspersed_args()
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parser.add_option('-v', '--verbose',
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action='count', default=0,
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help="Increase verbosity; can be specified multiple times")
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parser.add_option('-c', '--retry-count', metavar='COUNT',
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type=int, default=GitRetry.DEFAULT_RETRY_COUNT,
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help="Number of times to retry (default=%default)")
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parser.add_option('-d', '--delay', metavar='SECONDS',
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type=float, default=GitRetry.DEFAULT_DELAY_SECS,
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help="Specifies the amount of time (in seconds) to wait "
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"between successive retries (default=%default). This "
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"can be zero.")
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parser.add_option('-D', '--delay-factor', metavar='FACTOR',
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type=int, default=2,
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help="The exponential factor to apply to delays in between "
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"successive failures (default=%default). If this is "
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"zero, delays will increase linearly. Set this to "
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"one to have a constant (non-increasing) delay.")
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opts, args = parser.parse_args(args)
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# Configure logging verbosity
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if opts.verbose == 0:
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logging.getLogger().setLevel(logging.WARNING)
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elif opts.verbose == 1:
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logging.getLogger().setLevel(logging.INFO)
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else:
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logging.getLogger().setLevel(logging.DEBUG)
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# Execute retries
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retry = GitRetry(
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retry_count=opts.retry_count,
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delay=opts.delay,
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delay_factor=opts.delay_factor,
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)
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return retry(*args)
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if __name__ == '__main__':
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logging.basicConfig()
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logging.getLogger().setLevel(logging.WARNING)
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sys.exit(main(sys.argv[2:]))
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
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<head>
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<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
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<meta name="generator" content="AsciiDoc 8.6.9" />
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<title>git-retry(1)</title>
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<style type="text/css">
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/* Shared CSS for AsciiDoc xhtml11 and html5 backends */
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/* Default font. */
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body {
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font-family: Georgia,serif;
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}
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/* Title font. */
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h1, h2, h3, h4, h5, h6,
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div.title, caption.title,
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thead, p.table.header,
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#toctitle,
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#author, #revnumber, #revdate, #revremark,
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#footer {
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font-family: Arial,Helvetica,sans-serif;
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}
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body {
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margin: 1em 5% 1em 5%;
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}
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a {
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color: blue;
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text-decoration: underline;
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}
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a:visited {
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color: fuchsia;
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}
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em {
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font-style: italic;
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color: navy;
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}
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strong {
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font-weight: bold;
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color: #083194;
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}
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h1, h2, h3, h4, h5, h6 {
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color: #527bbd;
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margin-top: 1.2em;
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margin-bottom: 0.5em;
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line-height: 1.3;
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}
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h1, h2, h3 {
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border-bottom: 2px solid silver;
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}
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h2 {
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padding-top: 0.5em;
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}
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h3 {
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float: left;
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}
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h3 + * {
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clear: left;
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}
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h5 {
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font-size: 1.0em;
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}
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div.sectionbody {
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margin-left: 0;
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}
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hr {
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border: 1px solid silver;
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}
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p {
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margin-top: 0.5em;
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margin-bottom: 0.5em;
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}
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ul, ol, li > p {
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margin-top: 0;
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}
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ul > li { color: #aaa; }
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ul > li > * { color: black; }
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.monospaced, code, pre {
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font-family: "Courier New", Courier, monospace;
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font-size: inherit;
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color: navy;
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padding: 0;
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margin: 0;
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}
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pre {
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white-space: pre-wrap;
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}
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#author {
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color: #527bbd;
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font-weight: bold;
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font-size: 1.1em;
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}
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#email {
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}
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#revnumber, #revdate, #revremark {
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}
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#footer {
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font-size: small;
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border-top: 2px solid silver;
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padding-top: 0.5em;
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margin-top: 4.0em;
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}
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#footer-text {
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float: left;
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padding-bottom: 0.5em;
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}
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#footer-badges {
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float: right;
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padding-bottom: 0.5em;
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}
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#preamble {
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margin-top: 1.5em;
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margin-bottom: 1.5em;
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}
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div.imageblock, div.exampleblock, div.verseblock,
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div.quoteblock, div.literalblock, div.listingblock, div.sidebarblock,
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div.admonitionblock {
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margin-top: 1.0em;
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margin-bottom: 1.5em;
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}
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div.admonitionblock {
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margin-top: 2.0em;
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margin-bottom: 2.0em;
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margin-right: 10%;
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color: #606060;
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}
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div.content { /* Block element content. */
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padding: 0;
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}
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/* Block element titles. */
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div.title, caption.title {
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color: #527bbd;
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font-weight: bold;
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text-align: left;
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margin-top: 1.0em;
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margin-bottom: 0.5em;
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}
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div.title + * {
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margin-top: 0;
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}
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td div.title:first-child {
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margin-top: 0.0em;
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}
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div.content div.title:first-child {
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margin-top: 0.0em;
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}
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div.content + div.title {
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margin-top: 0.0em;
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}
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div.sidebarblock > div.content {
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background: #ffffee;
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border: 1px solid #dddddd;
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border-left: 4px solid #f0f0f0;
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padding: 0.5em;
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}
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div.listingblock > div.content {
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border: 1px solid #dddddd;
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border-left: 5px solid #f0f0f0;
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background: #f8f8f8;
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padding: 0.5em;
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}
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div.quoteblock, div.verseblock {
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padding-left: 1.0em;
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margin-left: 1.0em;
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margin-right: 10%;
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border-left: 5px solid #f0f0f0;
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color: #888;
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}
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div.quoteblock > div.attribution {
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padding-top: 0.5em;
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text-align: right;
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}
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div.verseblock > pre.content {
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font-family: inherit;
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font-size: inherit;
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}
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div.verseblock > div.attribution {
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padding-top: 0.75em;
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text-align: left;
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}
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/* DEPRECATED: Pre version 8.2.7 verse style literal block. */
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div.verseblock + div.attribution {
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text-align: left;
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}
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div.admonitionblock .icon {
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vertical-align: top;
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font-size: 1.1em;
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font-weight: bold;
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text-decoration: underline;
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color: #527bbd;
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padding-right: 0.5em;
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}
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div.admonitionblock td.content {
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padding-left: 0.5em;
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border-left: 3px solid #dddddd;
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}
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div.exampleblock > div.content {
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border-left: 3px solid #dddddd;
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padding-left: 0.5em;
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}
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div.imageblock div.content { padding-left: 0; }
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span.image img { border-style: none; vertical-align: text-bottom; }
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a.image:visited { color: white; }
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dl {
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margin-top: 0.8em;
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margin-bottom: 0.8em;
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}
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dt {
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margin-top: 0.5em;
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margin-bottom: 0;
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font-style: normal;
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color: navy;
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}
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dd > *:first-child {
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margin-top: 0.1em;
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}
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ul, ol {
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list-style-position: outside;
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}
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ol.arabic {
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list-style-type: decimal;
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}
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ol.loweralpha {
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list-style-type: lower-alpha;
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}
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ol.upperalpha {
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list-style-type: upper-alpha;
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}
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ol.lowerroman {
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list-style-type: lower-roman;
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}
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ol.upperroman {
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list-style-type: upper-roman;
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}
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div.compact ul, div.compact ol,
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div.compact p, div.compact p,
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div.compact div, div.compact div {
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margin-top: 0.1em;
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margin-bottom: 0.1em;
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}
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tfoot {
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font-weight: bold;
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}
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td > div.verse {
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white-space: pre;
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}
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div.hdlist {
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margin-top: 0.8em;
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margin-bottom: 0.8em;
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}
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div.hdlist tr {
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padding-bottom: 15px;
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}
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dt.hdlist1.strong, td.hdlist1.strong {
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font-weight: bold;
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}
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td.hdlist1 {
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vertical-align: top;
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font-style: normal;
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padding-right: 0.8em;
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color: navy;
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}
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td.hdlist2 {
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vertical-align: top;
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}
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div.hdlist.compact tr {
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margin: 0;
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padding-bottom: 0;
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}
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.comment {
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background: yellow;
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}
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.footnote, .footnoteref {
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font-size: 0.8em;
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}
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span.footnote, span.footnoteref {
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vertical-align: super;
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}
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#footnotes {
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margin: 20px 0 20px 0;
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padding: 7px 0 0 0;
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}
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#footnotes div.footnote {
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margin: 0 0 5px 0;
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}
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#footnotes hr {
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border: none;
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border-top: 1px solid silver;
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height: 1px;
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text-align: left;
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margin-left: 0;
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width: 20%;
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min-width: 100px;
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}
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div.colist td {
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padding-right: 0.5em;
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padding-bottom: 0.3em;
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vertical-align: top;
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}
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div.colist td img {
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margin-top: 0.3em;
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}
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@media print {
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#footer-badges { display: none; }
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}
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#toc {
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margin-bottom: 2.5em;
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}
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#toctitle {
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color: #527bbd;
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font-size: 1.1em;
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font-weight: bold;
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margin-top: 1.0em;
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margin-bottom: 0.1em;
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}
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div.toclevel0, div.toclevel1, div.toclevel2, div.toclevel3, div.toclevel4 {
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margin-top: 0;
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margin-bottom: 0;
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}
|
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|
||||
<h1>
|
||||
git-retry(1) Manual Page
|
||||
</h1>
|
||||
<h2>NAME</h2>
|
||||
<div class="sectionbody">
|
||||
<p>git-retry -
|
||||
Bootstrap function to retry a git command.
|
||||
</p>
|
||||
</div>
|
||||
</div>
|
||||
<div id="content">
|
||||
<div class="sect1">
|
||||
<h2 id="_synopsis">SYNOPSIS</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="verseblock">
|
||||
<pre class="content"><em>git retry</em> [-v] [-c COUNT] [-d DELAY] [-e] — <em><git_subcommand></em></pre>
|
||||
<div class="attribution">
|
||||
</div></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_description">DESCRIPTION</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph"><p><code>git retry</code> is a bootstrap that wraps a standard <code>git</code> command execution in
|
||||
a fault-tolerant retry wrapper.</p></div>
|
||||
<div class="paragraph"><p>If a retry succeeds, the return code of the successful attempt is returned.
|
||||
Otherwise, the return code of the last failed attempt is returned.</p></div>
|
||||
<div class="paragraph"><p>The wrapper is aware of <code>git</code>-specific failure conditions and will only consider
|
||||
retrying if a given failure can be linked to such a condition.</p></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_options">OPTIONS</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="dlist"><dl>
|
||||
<dt class="hdlist1">
|
||||
<git_subcommand>
|
||||
</dt>
|
||||
<dd>
|
||||
<p>
|
||||
The <code>git</code> command to retry. This should omit the actual <code>git</code> command (e.g.,
|
||||
to retry <code>git clone</code>, use <code>git retry clone</code>).
|
||||
</p>
|
||||
</dd>
|
||||
<dt class="hdlist1">
|
||||
-v, --verbose
|
||||
</dt>
|
||||
<dd>
|
||||
<p>
|
||||
Increases logging verbosity. By default, no additional logging is generated
|
||||
by the <code>git retry</code> command. This can be specified multiple times.
|
||||
</p>
|
||||
</dd>
|
||||
<dt class="hdlist1">
|
||||
-c, --retry-count <em>count</em>
|
||||
</dt>
|
||||
<dd>
|
||||
<p>
|
||||
Specify the number of retries that should be performed before giving up. The
|
||||
default retry count is <strong>5</strong>.
|
||||
</p>
|
||||
</dd>
|
||||
<dt class="hdlist1">
|
||||
-d, --delay <em>seconds</em>
|
||||
</dt>
|
||||
<dd>
|
||||
<p>
|
||||
Floating-point value that specifies the amount of time (in seconds) to wait
|
||||
after a failure. This can be zero to specify no delay. The default delay is
|
||||
<strong>3 seconds</strong>.
|
||||
</p>
|
||||
</dd>
|
||||
<dt class="hdlist1">
|
||||
-D, --delay-factor
|
||||
</dt>
|
||||
<dd>
|
||||
<p>
|
||||
The exponential factor to apply to the delay. By default this is <strong>2</strong>.
|
||||
For a given retry round <strong>n</strong>, the delay for that round will be
|
||||
<strong>(<delay-factor>^(n-1) * delay)</strong>. If no delay is specified, this will have
|
||||
no effect.
|
||||
If the delay factor is <strong>0</strong>, the delay will increase linearly (for a given
|
||||
retry round <strong>n</strong>, the delay will be <strong>(n * delay)</strong>).
|
||||
</p>
|
||||
<div class="literalblock">
|
||||
<div class="content">
|
||||
<pre><code>(Note that a delay factor of *1* will result in a constant delay.)</code></pre>
|
||||
</div></div>
|
||||
</dd>
|
||||
</dl></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_exit_status">EXIT STATUS</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph"><p>Upon success, <code>git retry</code> will exit with the successful exit code of <strong>0</strong>. On
|
||||
failure, it will exit with the exit code of the last failed attempt.</p></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_chromium_depot_tools">CHROMIUM DEPOT_TOOLS</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph"><p>Part of the chromium <a href="depot_tools.html">depot_tools(7)</a> suite. These tools are meant to
|
||||
assist with the development of chromium and related projects. Download the tools
|
||||
from <a href="https://chromium.googlesource.com/chromium/tools/depot_tools.git">here</a>.</p></div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div id="footnotes"><hr /></div>
|
||||
<div id="footer">
|
||||
<div id="footer-text">
|
||||
Last updated 2014-07-22 16:12:20 PDT
|
||||
</div>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
@ -0,0 +1,108 @@
|
||||
'\" t
|
||||
.\" Title: git-retry
|
||||
.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
|
||||
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
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.\" Date: 07/22/2014
|
||||
.\" Manual: Chromium depot_tools Manual
|
||||
.\" Source: depot_tools 7242c60
|
||||
.\" Language: English
|
||||
.\"
|
||||
.TH "GIT\-RETRY" "1" "07/22/2014" "depot_tools 7242c60" "Chromium depot_tools Manual"
|
||||
.\" -----------------------------------------------------------------
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|
||||
git-retry \- Bootstrap function to retry a git command\&.
|
||||
.SH "SYNOPSIS"
|
||||
.sp
|
||||
.nf
|
||||
\fIgit retry\fR [\-v] [\-c COUNT] [\-d DELAY] [\-e] \(em \fI<git_subcommand>\fR
|
||||
.fi
|
||||
.sp
|
||||
.SH "DESCRIPTION"
|
||||
.sp
|
||||
git retry is a bootstrap that wraps a standard git command execution in a fault\-tolerant retry wrapper\&.
|
||||
.sp
|
||||
If a retry succeeds, the return code of the successful attempt is returned\&. Otherwise, the return code of the last failed attempt is returned\&.
|
||||
.sp
|
||||
The wrapper is aware of git\-specific failure conditions and will only consider retrying if a given failure can be linked to such a condition\&.
|
||||
.SH "OPTIONS"
|
||||
.PP
|
||||
<git_subcommand>
|
||||
.RS 4
|
||||
The
|
||||
git
|
||||
command to retry\&. This should omit the actual
|
||||
git
|
||||
command (e\&.g\&., to retry
|
||||
git clone, use
|
||||
git retry clone)\&.
|
||||
.RE
|
||||
.PP
|
||||
\-v, \-\-verbose
|
||||
.RS 4
|
||||
Increases logging verbosity\&. By default, no additional logging is generated by the
|
||||
git retry
|
||||
command\&. This can be specified multiple times\&.
|
||||
.RE
|
||||
.PP
|
||||
\-c, \-\-retry\-count \fIcount\fR
|
||||
.RS 4
|
||||
Specify the number of retries that should be performed before giving up\&. The default retry count is
|
||||
\fB5\fR\&.
|
||||
.RE
|
||||
.PP
|
||||
\-d, \-\-delay \fIseconds\fR
|
||||
.RS 4
|
||||
Floating\-point value that specifies the amount of time (in seconds) to wait after a failure\&. This can be zero to specify no delay\&. The default delay is
|
||||
\fB3 seconds\fR\&.
|
||||
.RE
|
||||
.PP
|
||||
\-D, \-\-delay\-factor
|
||||
.RS 4
|
||||
The exponential factor to apply to the delay\&. By default this is
|
||||
\fB2\fR\&. For a given retry round
|
||||
\fBn\fR, the delay for that round will be
|
||||
\fB(<delay\-factor>^(n\-1) * delay)\fR\&. If no delay is specified, this will have no effect\&. If the delay factor is
|
||||
\fB0\fR, the delay will increase linearly (for a given retry round
|
||||
\fBn\fR, the delay will be
|
||||
\fB(n * delay)\fR)\&.
|
||||
.sp
|
||||
.if n \{\
|
||||
.RS 4
|
||||
.\}
|
||||
.nf
|
||||
(Note that a delay factor of *1* will result in a constant delay\&.)
|
||||
.fi
|
||||
.if n \{\
|
||||
.RE
|
||||
.\}
|
||||
.RE
|
||||
.SH "EXIT STATUS"
|
||||
.sp
|
||||
Upon success, git retry will exit with the successful exit code of \fB0\fR\&. On failure, it will exit with the exit code of the last failed attempt\&.
|
||||
.SH "CHROMIUM DEPOT_TOOLS"
|
||||
.sp
|
||||
Part of the chromium \fBdepot_tools\fR(7) suite\&. These tools are meant to assist with the development of chromium and related projects\&. Download the tools from \m[blue]\fBhere\fR\m[]\&\s-2\u[1]\d\s+2\&.
|
||||
.SH "NOTES"
|
||||
.IP " 1." 4
|
||||
here
|
||||
.RS 4
|
||||
\%https://chromium.googlesource.com/chromium/tools/depot_tools.git
|
||||
.RE
|
@ -0,0 +1,2 @@
|
||||
Bootstrap function to retry a git command.
|
||||
|
@ -0,0 +1,67 @@
|
||||
git-retry(1)
|
||||
=============
|
||||
|
||||
NAME
|
||||
----
|
||||
git-retry -
|
||||
include::_git-retry_desc.helper.txt[]
|
||||
|
||||
SYNOPSIS
|
||||
--------
|
||||
[verse]
|
||||
'git retry' [-v] [-c COUNT] [-d DELAY] [-e] -- _<git_subcommand>_
|
||||
|
||||
DESCRIPTION
|
||||
-----------
|
||||
|
||||
`git retry` is a bootstrap that wraps a standard `git` command execution in
|
||||
a fault-tolerant retry wrapper.
|
||||
|
||||
If a retry succeeds, the return code of the successful attempt is returned.
|
||||
Otherwise, the return code of the last failed attempt is returned.
|
||||
|
||||
The wrapper is aware of `git`-specific failure conditions and will only consider
|
||||
retrying if a given failure can be linked to such a condition.
|
||||
|
||||
|
||||
OPTIONS
|
||||
-------
|
||||
|
||||
<git_subcommand>::
|
||||
The `git` command to retry. This should omit the actual `git` command (e.g.,
|
||||
to retry `git clone`, use `git retry clone`).
|
||||
|
||||
-v, --verbose::
|
||||
Increases logging verbosity. By default, no additional logging is generated
|
||||
by the `git retry` command. This can be specified multiple times.
|
||||
|
||||
-c, --retry-count _count_::
|
||||
Specify the number of retries that should be performed before giving up. The
|
||||
default retry count is *5*.
|
||||
|
||||
-d, --delay _seconds_::
|
||||
Floating-point value that specifies the amount of time (in seconds) to wait
|
||||
after a failure. This can be zero to specify no delay. The default delay is
|
||||
*3 seconds*.
|
||||
|
||||
-D, --delay-factor::
|
||||
The exponential factor to apply to the delay. By default this is *2*.
|
||||
For a given retry round *n*, the delay for that round will be
|
||||
*(<delay-factor>^(n-1) * delay)*. If no delay is specified, this will have
|
||||
no effect.
|
||||
If the delay factor is *0*, the delay will increase linearly (for a given
|
||||
retry round *n*, the delay will be *(n * delay)*).
|
||||
|
||||
(Note that a delay factor of *1* will result in a constant delay.)
|
||||
|
||||
|
||||
EXIT STATUS
|
||||
-----------
|
||||
|
||||
Upon success, `git retry` will exit with the successful exit code of *0*. On
|
||||
failure, it will exit with the exit code of the last failed attempt.
|
||||
|
||||
|
||||
include::_footer.txt[]
|
||||
|
||||
// vim: ft=asciidoc:
|
Loading…
Reference in New Issue