Source code for autotest.client.shared.base_check_version

# This file must use Python 1.5 syntax.
import glob
import os
import re
import sys


[docs]class base_check_python_version: def __init__(self): version = None try: version = sys.version_info[0:2] except AttributeError: pass # pre 2.0, no neat way to get the exact number # 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 # pylin: disable=W0611' 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 not version or version < (2, 4) or version >= (3, 0): try: # We can't restart when running under mod_python. from mod_python import apache except ImportError: self.restart()
[docs] def extract_version(self, path): match = re.search(r'/python(\d+)\.(\d+)$', path) if match: return (int(match.group(1)), int(match.group(2))) else: return None
PYTHON_BIN_GLOB_STRINGS = ['/usr/bin/python2*', '/usr/local/bin/python2*']
[docs] def find_desired_python(self): """Returns the path of the desired python interpreter.""" pythons = [] for glob_str in self.PYTHON_BIN_GLOB_STRINGS: pythons.extend(glob.glob(glob_str)) possible_versions = [] best_python = (0, 0), '' for python in pythons: version = self.extract_version(python) if version and version >= (2, 4): possible_versions.append((version, python)) possible_versions.sort() if not possible_versions: raise ValueError('Python 2.x version 2.4 or better is required') # Return the lowest possible version so that we use 2.4 if available # rather than more recent versions. return possible_versions[0][1]
[docs] 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)