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# -*- coding: utf-8 -*-
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2019 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT
from __future__ import print_function
from __future__ import division
from __future__ import absolute_import
import glob
import os
import re
import subprocess
from clcommon import clcagefs
from clselect.clselectexcept import ClSelectExcept
from clselect.utils import run_process_in_cagefs
ALT_PATH = '/opt/alt'
INT_BASE = 'python'
INT_VERS = '??'
DIGITS_VERSION_PATTERN = re.compile(r'(?P<version>\d\.?\d+)$')
VERSION_PATTERN = re.compile(r'(^|.*/)python(?P<version>\d\.\d+)$')
WRAPPERS_PATH = '/usr/share/l.v.e-manager/utils'
PYTHON_WRAPPER = 'python_wrapper'
class Interpreter(object):
def __init__(self, prefix=None, binary=None, version=None,
version_full=None, target_user=None):
self.binary_list = list() # accumulate list python bin in virtual environment (using for update python bin)
self.user = target_user
if prefix and binary:
self.prefix = prefix
self.binary = binary
self.binary_list.append(self.binary)
self.python_bin = binary
elif prefix:
self.python_bin = None
self.prefix = prefix
match = re.search(DIGITS_VERSION_PATTERN, self.prefix)
suffix = match.group('version')
if '.' not in suffix:
suffix = f'{suffix[0]}.{suffix[1:]}'
self.version_from_suffix = suffix
python_realbin = os.path.join(self.prefix, 'bin', 'python')
binaries_to_check = [
python_realbin, # bin/python
python_realbin + suffix.split('.')[0], # bin/python2
python_realbin + suffix # bin/python2.*
]
for bin_file in binaries_to_check:
if self._is_real_file(bin_file):
self.python_bin = bin_file
self.binary_list.append(bin_file)
if self._is_link_to_wrapper(bin_file):
binary = bin_file
real_binary = bin_file + "_bin"
if self._is_real_file(real_binary):
self.python_bin = real_binary
self.binary_list.append(real_binary)
# now python_bin is REAL BINARY in venv
# for old selector: binary pythonX.Y
# for new selector: binary pythonX.Y_bin
if not self.python_bin:
raise ClSelectExcept.InterpreterError(
'Can not find python binary in directory: "%s"' % os.path.dirname(python_realbin))
# if there is no symlink to wrapper (old selector)
if not binary:
binary = self.python_bin
self.binary = binary
elif binary:
self.binary = binary
self.binary_list = [binary]
self.prefix = os.path.abspath(os.path.join(
os.path.dirname(binary), os.path.pardir))
self.python_bin = binary
else:
interpreter = interpreters('version')['2.7']
self.binary = interpreter.binary
self.prefix = interpreter.prefix
self.version = interpreter.version
self.version_full = interpreter.version_full
self.python_bin = interpreter.binary
if version:
self.version = version
else:
self.version = None
if version_full:
self.version_full = version_full
else:
try:
if self.user and not clcagefs.in_cagefs():
user = self.user
result = run_process_in_cagefs(user, self.python_bin,
['-c', 'import sys; print(sys.version)'])
if result['returncode'] != 0:
raise OSError('Unable to get python version %s', result['output'])
self.version_full = result['output'].split()[0]
else:
# already in cagefs OR no need to exec as user (e.g global alt python is called)
version_raw = subprocess.check_output(
[self.python_bin, '-c', 'import sys; print(sys.version)'], text=True)
self.version_full = version_raw.split()[0]
except (OSError, IndexError, subprocess.CalledProcessError) as e:
ver_ = VERSION_PATTERN.match(self.binary)
if ver_:
self.version = ver_.group('version')
self.version_full = None
elif self.version_from_suffix:
self.version = self.version_from_suffix
self.version_full = None
else:
raise ClSelectExcept.InterpreterError(
'Error detect python binary version "%s"; %s' % (self.binary, str(e)))
if not self.version and self.version_full:
self.version = '.'.join(self.version_full.split('.')[:2])
def _is_real_file(self, path):
"""Check that given path is a file and not symlink"""
return os.path.isfile(path) and (not os.path.islink(path) or os.readlink(path).startswith('/opt/alt/python'))
@staticmethod
def _is_link_to_wrapper(path):
"""
Since we have python wrapper, all python files are symlinks now
So real binary - path which must be written to .htaccess
is considered symlink that links to python wrapper
"""
wrapper_path = os.path.join(WRAPPERS_PATH, PYTHON_WRAPPER)
if os.path.islink(path):
return os.readlink(path) == wrapper_path
return os.path.isfile(path)
def __repr__(self):
return (
"%s.%s(prefix='%s', version='%s', binary='%s', "
"version_full='%s')" % (
self.__class__.__module__, self.__class__.__name__,
self.prefix, self.version, self.binary, self.version_full
))
def as_dict(self, key=None):
i = {
'prefix': self.prefix,
'binary': self.binary,
'version': self.version,
'version_full': self.version_full,
}
if key:
del i[key]
return {getattr(self, key): i}
return i
def interpreters(key=None):
search_path = os.path.join(ALT_PATH, INT_BASE)
digit = '[0-9]'
interps = []
for path in glob.glob(f'{search_path}{digit * 2}') + glob.glob(f'{search_path}{digit * 3}'):
try:
# global interpreters -> no need to pass user
interpreter = Interpreter(path)
except ClSelectExcept.InterpreterError:
continue
# the only case when version_full is None is
# when we are not able to get it from binary
# (e.g. we are in broken virtual environment or
# some package is broken), and we do not need such
# interpreters neither in statistics nor in selector
if interpreter.version_full is not None:
interps.append(interpreter)
if key:
return dict((getattr(i, key), i) for i in interps)
else:
return interps
def interpreters_dict(key):
return dict(list(i.as_dict(key).items())[0] for i in interpreters())
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