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# -*- 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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Name	Size	Perms	Modified	Actions
cache DIR	-	drwxr-xr-x	2026-03-03 08:59:01	Edit Download recursive recursive
GeneralPanel DIR	-	drwxr-xr-x	2026-03-03 08:59:01	Edit Download recursive recursive
plugins DIR	-	drwxr-xr-x	2026-03-03 08:59:01	Edit Download recursive recursive
__pycache__ DIR	-	drwxr-xr-x	2026-03-03 08:59:01	Edit Download recursive recursive
apilink.py	267 B	lrw-r--r--	2026-02-13 12:40:39	Edit Download recursive recursive
clcpapi.py	3.64 KB	lrw-r--r--	2026-02-13 12:40:39	Edit Download recursive recursive
const.py	511 B	lrw-r--r--	2026-02-13 12:40:39	Edit Download recursive recursive
cpapicustombin.py	2.12 KB	lrw-r--r--	2026-02-13 12:40:39	Edit Download recursive recursive
cpapiexceptions.py	1.75 KB	lrw-r--r--	2026-02-13 12:40:39	Edit Download recursive recursive
panel_hooks_lib.py	1.22 KB	lrw-r--r--	2026-02-13 12:40:39	Edit Download recursive recursive
pluginlib.py	7.57 KB	lrw-r--r--	2026-02-13 12:40:39	Edit Download recursive recursive
utils.py	1.03 KB	lrw-r--r--	2026-02-13 12:40:39	Edit Download recursive recursive
__init__.py	14.54 KB	lrw-r--r--	2026-02-13 12:40:39	Edit Download recursive recursive