#!/usr/bin/env sage-system-python
# vim: set filetype=python:

# USAGE:
#
#     sage-flock [-s|-x] LOCKFILE COMMAND [...]
#
# Obtain an exclusive (-x, default) or shared (-s) lock on LOCKFILE and then
# exec COMMAND, with remaining arguments passed to COMMAND.
#
# This is originally motivated by pip, but has since been generalized.  We
# should avoid running pip while uninstalling a package because that is prone
# to race conditions. This script can be used to run pip under a lock.  For
# details, see https://trac.sagemath.org/ticket/21672

try:
    import sage_bootstrap
except ImportError:
    import os, sys
    sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
    import sage_bootstrap

from sage_bootstrap.flock import run
run()
