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Mini Shell
Mini Shell
# -*- 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 json
import os
import pwd
from clselect.utils import check_call, list_dirs, run_command_full
from .interpreters import Interpreter
DEFAULT_PREFIX = 'nodevenv'
NODEVENV_BIN = os.path.join(os.path.dirname(__file__), 'nodevenv.py')
PYTHON_PATH = '/opt/cloudlinux/venv/bin/python3'
APP_CONFIG = 'package.json'
class Environment(object):
def __init__(self, name, user=None, prefix=None):
self.name = name
if user:
self.user = user
else:
self.user = pwd.getpwuid(os.getuid()).pw_name
if prefix is None:
self.prefix = DEFAULT_PREFIX
else:
self.prefix = prefix
self.path = os.path.join(_abs_prefix(self.user, self.prefix), name)
self._interpreter = None
self._npm = None
self.interpreter_name = 'node' + name
def __repr__(self):
return ("%s.%s(name='%s', user='%s', prefix='%s')" % (
self.__class__.__module__, self.__class__.__name__,
self.name, self.user, self.prefix))
def _demote(self):
user_pwd = pwd.getpwnam(self.user)
def func():
os.setgid(user_pwd.pw_gid)
os.setuid(user_pwd.pw_uid)
os.environ['USER'] = self.user
os.environ['HOME'] = user_pwd.pw_dir
return func
def as_dict(self, key=None):
e = {
'name': self.name,
'interpreter': self.interpreter(),
}
if key:
del e[key]
return {getattr(self, key): e}
return e
def as_deepdict(self, key=None):
e = {
'name': self.name,
'interpreter': self.interpreter().as_dict(),
}
if key:
del e[key]
return {getattr(self, key): e}
return e
def create(self, interpreter, destroy_first=False):
args = [
PYTHON_PATH, NODEVENV_BIN,
'--node', interpreter.binary,
]
if destroy_first:
args.append('--recreate-bin')
args.append(self.path)
kwargs = {'preexec_fn': self._demote()}
if os.getuid() == 0:
args = ['/bin/cagefs_enter'] + args
check_call(*args, **kwargs)
def destroy(self):
check_call('/bin/rm', '-r', '--interactive=never', self.path,
preexec_fn=self._demote())
def exists(self):
return os.path.exists(self.path)
def interpreter(self):
if not self._interpreter:
self._interpreter = Interpreter(prefix=self.path)
return self._interpreter
def npm(self):
if not self._npm:
self._npm = os.path.join(self.path, 'bin', 'npm')
return self._npm
def extension_install(self, extension='-', cwd=None):
"""
Install nodejs extension
:param cwd: current working directory for npm (it's full path to app root by default)
:param extension: name and version of extension
:return: None
"""
# git is need for npm install from git repositories
# we didn't add git to cagefs, because we use git from cpanel
command = (self.npm(), 'install')
# extension is defined
if extension != '-':
command += (extension,)
# npm takes list of extensions from package.json if extension is '-'
else:
config_path = os.path.join(cwd, APP_CONFIG)
if not os.path.isfile(config_path):
# package.json is absent
return 0
# command sample
# npm install <module>@<version> <git_path_to_repository> ...
check_call(args=command, preexec_fn=self._demote(), cwd=cwd)
def extension_install_single_call(self, extensions_list):
"""
Install nodejs extension
:param extensions_list: name and version of extension
:return: None
"""
command = [self.npm(), 'install']
command.extend(extensions_list)
# npm install <module1>@<version1> <module2>@<version2> ...
ret_code, _, _ = run_command_full(command, preexec_fn=self._demote())
return ret_code
def extension_update(self, extension):
raise NotImplementedError("It's not used for nodejs selector")
def extension_uninstall(self, extension):
raise NotImplementedError("It's not used for nodejs selector")
def extensions(self):
"""
Retrieves extensions dictionary for this virtual environment
:return: Extensions list.
Example:
[u'xpath@0.0.27', u'https://github.com/visionmedia/express']
"""
# get path to current virtual nodejs environment
cwd = os.path.split(os.path.split(self.npm())[0])[0]
# npm list --json
_, output, _ = run_command_full([self.npm(), 'list', '--json'], preexec_fn=self._demote(), cwd=cwd)
if output.strip():
data = json.loads(output)
else:
data = {}
extensions = data.get('dependencies', {})
# extensions example:
# {u'express': {u'version': u'4.16.3', u'from': u'express@^4.15.3', .... },
# u'express_new': {u'version': u'4.16.3', u'from': u'git+https://github.com/visionmedia/express.git', ....},
# u'request': {u'required': u'^2.81.0', u'missing': True},
# u'body-parser': {u'required': u'^1.17.2', u'missing': True}
# }
result = []
for name, info in extensions.items():
# module is missing or has no needed attributes - pass it
if info.get('missing', False) or 'from' not in info or 'version' not in info:
continue
if info['from'].startswith('git+'):
# extension from git
result.append(info['from'])
else:
# extension from standard npm repo
result.append('%s@%s' % (name, info['version']))
return result
def _abs_prefix(user=None, prefix=None):
if not prefix:
prefix = DEFAULT_PREFIX
if user:
return os.path.join(pwd.getpwnam(user).pw_dir, prefix)
else:
return os.path.join(pwd.getpwuid(os.getuid()).pw_dir, prefix)
def environments(user=None, prefix=None):
venv_path = _abs_prefix(user, prefix)
try:
env_list = list_dirs(venv_path)
except OSError:
return []
envs = []
for env_name in env_list:
envs.append(Environment(env_name, user, prefix))
return envs
def environments_dict(key, user=None, prefix=None):
return dict(list(e.as_dict(key=key).items()) for e in environments(user, prefix))
def environments_deepdict(key, user=None, prefix=None):
return dict(list(e.as_deepdict(key=key).items())
for e in environments(user, prefix))
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