blob: 68ee16cb8d857848b25fe49024393e6db7ff43f5 [file] [log] [blame]
# This file must use Python 1.5 syntax.
import glob
import os
import sys
class check_python_version:
def __init__(self):
# In order to ease the migration to Python3, disable the restart logic
# when AUTOTEST_NO_RESTART is set. This makes it possible to run
# autotest locally as Python3 before any other environment is switched
# to Python3.
if os.getenv("AUTOTEST_NO_RESTART"):
# The change to prefer 2.4 really messes up any systems which have both
# the new and old version of Python, but where the newer is default.
# This is because packages, libraries, etc are all installed into the
# new one by default. Some things (like running under mod_python) just
# plain don't handle python restarting properly. I know that I do some
# development under ipython and whenever I run (or do anything that
# runs) 'import common' it restarts my shell. Overall, the change was
# fairly annoying for me (and I can't get around having 2.4 and 2.5
# installed with 2.5 being default).
if sys.version_info.major >= 3:
# We can't restart when running under mod_python.
from mod_python import apache
except ImportError:
PYTHON_BIN_GLOB_STRINGS = ['/usr/bin/python2*', '/usr/local/bin/python2*']
def find_desired_python(self):
"""Returns the path of the desired python interpreter."""
# CrOS only ever has Python 2.7 available, so pick whatever matches.
pythons = []
for glob_str in self.PYTHON_BIN_GLOB_STRINGS:
return pythons[0]
def restart(self):
python = self.find_desired_python()
sys.stderr.write('NOTE: %s switching to %s\n' %
(os.path.basename(sys.argv[0]), python))
sys.argv.insert(0, '-u')
sys.argv.insert(0, python)
os.execv(sys.argv[0], sys.argv)