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File Manager
File Manager
Viewing File: pluginlib.py
# -*- coding: utf-8 -*-
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2018 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT
"""
Library to work with plug-ins
"""
import os
import py_compile
import subprocess
import sys
import pwd
import glob
import shutil
import syslog
from importlib import import_module
from configparser import ConfigParser
from clcommon.clcustomscript import lvectl_custompanel_script, CLSYSCONFIG
from .const import CACHE_CPNAME, UNKNOWN_CP_NAME, UNKNOWN_CP_IMPORT
from .cpapiexceptions import PluginImportError
clsysconfig = ConfigParser(interpolation=None, strict=False)
clsysconfig.read(CLSYSCONFIG)
CONTROLPANELNAME_VAR = '__cpname__'
DETECTFUNCNAME_VAR = 'detect'
PLUGINS_PKG_PREFIX = 'clcommon.cpapi'
PLUGINS_DIR = None
if clsysconfig.has_option(section='cpapi', option='plugindir'):
PLUGINS_DIR = clsysconfig.get(section='cpapi', option='plugindir')
if not os.path.exists(PLUGINS_DIR):
print("WARNING: plugindir is configured, but doesn't exists!")
API_LINK_PATH = os.path.join(os.path.dirname(__file__), 'apilink.py')
CPANEL_NAME = 'cPanel'
DIRECTADMIN_NAME = 'DirectAdmin'
PLESK_NAME = 'Plesk'
ISPMANAGER_NAME = 'ISPManager'
INTERWORX_NAME = 'InterWorx'
UNKNOWN_NAME = 'Unknown'
INTEGRATED_NAME = 'Integrated'
OFFICIAL_PLUGINS = {
CPANEL_NAME: 'cpanel',
DIRECTADMIN_NAME: 'directadmin',
PLESK_NAME: 'plesk',
ISPMANAGER_NAME: 'ispmanager',
INTERWORX_NAME: 'interworx',
UNKNOWN_NAME: 'backward_plugin',
INTEGRATED_NAME: 'vendors'
}
def detect_panel_fast():
"""
This function will try to detect our officially supported control panels
:return: tuple of CP name and CP plugin name to import
"""
panel_name, official_plugin_name = None, None
if os.path.isfile('/opt/cpvendor/etc/integration.ini'):
panel_name, official_plugin_name = INTEGRATED_NAME, OFFICIAL_PLUGINS[INTEGRATED_NAME]
elif os.path.isfile('/usr/local/cpanel/cpanel'):
panel_name, official_plugin_name = CPANEL_NAME, OFFICIAL_PLUGINS[CPANEL_NAME]
elif os.path.isfile('/usr/local/directadmin/directadmin') or\
os.path.isfile('/usr/local/directadmin/custombuild/build'):
panel_name, official_plugin_name = DIRECTADMIN_NAME, OFFICIAL_PLUGINS[DIRECTADMIN_NAME]
elif os.path.isfile('/usr/local/psa/version'):
panel_name, official_plugin_name = PLESK_NAME, OFFICIAL_PLUGINS[PLESK_NAME]
# ispmanager must have:
# v5: /usr/local/mgr5/ directory,
# v4: /usr/local/ispmgr/bin/ispmgr file
elif os.path.isfile('/usr/local/ispmgr/bin/ispmgr') or os.path.isdir('/usr/local/mgr5'):
panel_name, official_plugin_name = ISPMANAGER_NAME, OFFICIAL_PLUGINS[ISPMANAGER_NAME]
elif os.path.isdir('/usr/local/interworx'):
panel_name, official_plugin_name = INTERWORX_NAME, OFFICIAL_PLUGINS[INTERWORX_NAME]
elif lvectl_custompanel_script() is not None: # Check custom panel script to use backward plugin
panel_name, official_plugin_name = UNKNOWN_NAME, OFFICIAL_PLUGINS[UNKNOWN_NAME]
return panel_name, official_plugin_name
def get_cp_plugin_module(plugin_name=None):
if plugin_name:
# Case when some "official" plugin was already detected
return import_module(f'{PLUGINS_PKG_PREFIX}.plugins.{plugin_name}')
# Use cached module if detect_panel_fast() can't detect anything
# Actual import statement in file is updated on each rebuild_cache()
from .apilink import api as _apiplugin # pylint: disable=import-outside-toplevel
return _apiplugin
def detectplugin(plugin_pack, ignore_errors=False):
"""
Scan directory for presence of plugins. Plugin is a file that has
the extension ".py" and a non-empty variable "__cpname__" (the name
of the control panel). The file must contain a function "detect"
which returns True in case of presence of the corresponding
control panel.
>>> detectplugin('plugins')
('from .plugins import cpanel as api', 'cPanel')
:param plugin_pack: package name or the name of the plug-ins directory
('cache' - cache plugins users; 'plugins' - officially supported plug-ins)
:rtype: tuple
:return: a pair of values: (line to import the package, the name of the control panel)
"""
plugin_dir = os.path.join(os.path.dirname(__file__), plugin_pack)
plugin_path_pattern = os.path.join(plugin_dir, '*.py')
modules = [
os.path.splitext(os.path.basename(py_full_path))[0]
for py_full_path in glob.glob(plugin_path_pattern)
]
for mod_name in modules:
if mod_name == '__init__':
continue
absolute_module_name = f'{PLUGINS_PKG_PREFIX}.{plugin_pack}.{mod_name}'
import_string = f'from .{plugin_pack} import {mod_name} as api'
try:
api = import_module(absolute_module_name)
except ImportError as e:
if ignore_errors:
continue
raise PluginImportError(f'Can not import {absolute_module_name} plugin') from e
try:
panel_class = api.PanelPlugin()
# Try to detect panel
panel_data = panel_class.get_cp_description()
return import_string, panel_data['name']
except (AttributeError, TypeError, KeyError) as exc:
syslog.syslog(
syslog.LOG_WARNING,
f'cpapi: Plugin {mod_name} does not satisfy cpapi requirements:\n{exc}',
)
return None, None
def getuser():
"""
Get current user's username based on os.getuid()
:rtype: str
"""
uid = os.getuid()
if uid == 0:
return 'root'
return pwd.getpwuid(uid)[0]
def _reinit_module(init_path):
"""create (or rewrite) an empty __init__.py and it's .pyc/.pyo parts"""
with open(init_path, 'w', encoding='utf-8'):
pass
py_compile.compile(init_path)
# In Py2 ".pyo" files can be generated only like this:
subprocess.run(
f'{sys.executable} -O -m py_compile "{init_path}"',
shell=True,
executable='/bin/bash',
check=False,
)
def rebuild_cache(plugins_dir=PLUGINS_DIR):
CACHE_DIR = 'cache'
PLUGINS_PATH = 'plugins' # directory with official supported plugins
cache_dir = os.path.join(os.path.dirname(__file__), CACHE_DIR)
# delete all in cache dir
shutil.rmtree(cache_dir)
if plugins_dir and os.path.isdir(plugins_dir):
# copy all from plugins dir to cache
shutil.copytree(plugins_dir, cache_dir)
else:
os.mkdir(cache_dir)
os.chmod(cache_dir, 0o755)
init_path = os.path.join(cache_dir, '__init__.py')
_reinit_module(init_path)
try:
import_string, cpname = detectplugin(CACHE_DIR)
except PluginImportError as exc:
import_string, cpname = None, None
print(f'WARNING: {exc}')
if cpname is None:
shutil.rmtree(cache_dir)
os.mkdir(cache_dir)
_reinit_module(init_path)
import_string, cpname = detectplugin(PLUGINS_PATH, ignore_errors=True)
if cpname is None:
import_string, cpname = (UNKNOWN_CP_IMPORT, UNKNOWN_CP_NAME)
print(f'WARNING: can not detect control panel; the control panel is set to "{cpname}"')
# write control panel name to cache file
if cpname:
# write control panel name to /var/cache/controlpanelname
with open(CACHE_CPNAME, 'w', encoding='utf-8') as f:
f.write(cpname)
# Write plugin import string for fast loading.
# Example:
# from .plugins import nopanel as api
with open(API_LINK_PATH, 'w', encoding='utf-8') as f:
f.write(import_string + '\n')
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