mirror of https://github.com/docker/compose.git
93 lines
2.7 KiB
Python
93 lines
2.7 KiB
Python
#!/usr/bin/env python
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'''
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timeparse.py
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(c) Will Roberts <wildwilhelm@gmail.com> 1 February, 2014
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This is a vendored and modified copy of:
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github.com/wroberts/pytimeparse @ cc0550d
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It has been modified to mimic the behaviour of
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https://golang.org/pkg/time/#ParseDuration
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'''
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# MIT LICENSE
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import re
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HOURS = r'(?P<hours>[\d.]+)h'
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MINS = r'(?P<mins>[\d.]+)m'
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SECS = r'(?P<secs>[\d.]+)s'
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MILLI = r'(?P<milli>[\d.]+)ms'
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MICRO = r'(?P<micro>[\d.]+)(?:us|µs)'
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NANO = r'(?P<nano>[\d.]+)ns'
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def opt(x):
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return r'(?:{x})?'.format(x=x)
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TIMEFORMAT = r'{HOURS}{MINS}{SECS}{MILLI}{MICRO}{NANO}'.format(
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HOURS=opt(HOURS),
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MINS=opt(MINS),
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SECS=opt(SECS),
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MILLI=opt(MILLI),
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MICRO=opt(MICRO),
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NANO=opt(NANO),
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)
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MULTIPLIERS = {
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'hours': 60 * 60,
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'mins': 60,
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'secs': 1,
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'milli': 1.0 / 1000,
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'micro': 1.0 / 1000.0 / 1000,
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'nano': 1.0 / 1000.0 / 1000.0 / 1000.0,
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}
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def timeparse(sval):
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"""Parse a time expression, returning it as a number of seconds. If
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possible, the return value will be an `int`; if this is not
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possible, the return will be a `float`. Returns `None` if a time
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expression cannot be parsed from the given string.
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Arguments:
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- `sval`: the string value to parse
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>>> timeparse('1m24s')
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84
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>>> timeparse('1.2 minutes')
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72
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>>> timeparse('1.2 seconds')
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1.2
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"""
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match = re.match(r'\s*' + TIMEFORMAT + r'\s*$', sval, re.I)
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if not match or not match.group(0).strip():
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return
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mdict = match.groupdict()
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return sum(
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MULTIPLIERS[k] * cast(v) for (k, v) in mdict.items() if v is not None)
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def cast(value):
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return int(value) if value.isdigit() else float(value)
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