Server IP : 85.214.239.14 / Your IP : 3.139.69.138 Web Server : Apache/2.4.62 (Debian) System : Linux h2886529.stratoserver.net 4.9.0 #1 SMP Tue Jan 9 19:45:01 MSK 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.18 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : OFF | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : OFF Directory : /usr/share/dh-python/dhpython/ |
Upload File : |
# Copyright © 2022 Stefano Rivera <stefanor@debian.org> # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. """ Handle Environment Markers https://www.python.org/dev/peps/pep-0508/#environment-markers TODO: Ideally replace with the packaging library, but the API is currently private: https://github.com/pypa/packaging/issues/496 """ import re SIMPLE_ENV_MARKER_RE = re.compile(r''' (?P<marker>[a-z_]+) \s* (?P<op><=?|>=?|[=!~]=|===) \s* (?P<quote>['"]) (?P<value>.*) # Could contain additional markers (?P=quote) ''', re.VERBOSE) COMPLEX_ENV_MARKER_RE = re.compile(r''' (?:\s|\)) (?:and|or) (?:\s|\() ''', re.VERBOSE) class ComplexEnvironmentMarker(Exception): pass def parse_environment_marker(marker): """Parse a simple marker of <= 1 environment restriction""" marker = marker.strip() if marker.startswith('(') and marker.endswith(')'): marker = marker[1:-1].strip() m = COMPLEX_ENV_MARKER_RE.search(marker) if m: raise ComplexEnvironmentMarker() m = SIMPLE_ENV_MARKER_RE.match(marker) if not m: raise ComplexEnvironmentMarker() return ( m.group('marker'), m.group('op'), m.group('value'), )