forked from platypush/platypush
509 lines
16 KiB
Python
509 lines
16 KiB
Python
import datetime
|
|
import glob
|
|
import importlib
|
|
import inspect
|
|
import logging
|
|
import os
|
|
import pathlib
|
|
import pkgutil
|
|
import re
|
|
import shutil
|
|
import socket
|
|
import sys
|
|
from urllib.parse import quote
|
|
from typing import Any, Dict, Optional, Set
|
|
|
|
import yaml
|
|
|
|
from platypush.utils import (
|
|
get_hash,
|
|
is_functional_procedure,
|
|
is_functional_hook,
|
|
is_functional_cron,
|
|
)
|
|
|
|
|
|
class Config:
|
|
"""
|
|
Configuration base class
|
|
Usage:
|
|
- Initialize config from one of the default paths:
|
|
Config.init()
|
|
- Initialize config from a custom path
|
|
Config.init(config_file_path)
|
|
- Get a value
|
|
Config.get('foo')
|
|
"""
|
|
|
|
# Default config file locations:
|
|
# - current directory
|
|
# - $XDG_CONFIG_HOME/platypush/config.yaml
|
|
# - $HOME/.config/platypush/config.yaml
|
|
# - /etc/platypush/config.yaml
|
|
_cfgfile_locations = [
|
|
os.path.join(os.path.abspath('.'), 'config.yaml'),
|
|
os.path.join(os.environ.get('XDG_CONFIG_HOME', ''), 'config.yaml'),
|
|
os.path.join(os.path.expanduser('~'), '.config', 'platypush', 'config.yaml'),
|
|
os.path.join(os.sep, 'etc', 'platypush', 'config.yaml'),
|
|
]
|
|
|
|
# Config singleton instance
|
|
_instance = None
|
|
|
|
_default_constants = {
|
|
'today': datetime.date.today,
|
|
'now': datetime.datetime.now,
|
|
}
|
|
|
|
_workdir_location = os.path.join(
|
|
*(
|
|
(os.environ['XDG_DATA_HOME'], 'platypush')
|
|
if os.environ.get('XDG_DATA_HOME')
|
|
else (os.path.expanduser('~'), '.local', 'share', 'platypush')
|
|
)
|
|
)
|
|
|
|
_included_files: Set[str] = set()
|
|
|
|
def __init__(self, cfgfile: Optional[str] = None):
|
|
"""
|
|
Constructor. Always use the class as a singleton (i.e. through
|
|
Config.init), you won't probably need to call the constructor directly
|
|
|
|
:param cfgfile: Config file path (default: retrieve the first available
|
|
location in _cfgfile_locations).
|
|
"""
|
|
|
|
self.backends = {}
|
|
self.plugins = self._core_plugins
|
|
self.event_hooks = {}
|
|
self.procedures = {}
|
|
self.constants = {}
|
|
self.cronjobs = {}
|
|
self.dashboards = {}
|
|
self._plugin_manifests = {}
|
|
self._backend_manifests = {}
|
|
self._cfgfile = ''
|
|
|
|
self._init_cfgfile(cfgfile)
|
|
self._config = self._read_config_file(self._cfgfile)
|
|
|
|
self._init_secrets()
|
|
self._init_dirs()
|
|
self._init_db()
|
|
self._init_logging()
|
|
self._init_device_id()
|
|
self._init_environment()
|
|
self._init_manifests()
|
|
self._init_constants()
|
|
self._load_scripts()
|
|
self._init_components()
|
|
self._init_dashboards(self._config['dashboards_dir'])
|
|
|
|
def _init_cfgfile(self, cfgfile: Optional[str] = None):
|
|
if cfgfile is None:
|
|
cfgfile = self._get_default_cfgfile()
|
|
|
|
if cfgfile is None:
|
|
cfgfile = self._create_default_config()
|
|
|
|
self._cfgfile = os.path.abspath(os.path.expanduser(cfgfile))
|
|
|
|
def _init_logging(self):
|
|
logging_config = {
|
|
'level': logging.INFO,
|
|
'stream': sys.stdout,
|
|
'format': '%(asctime)-15s|%(levelname)5s|%(name)s|%(message)s',
|
|
}
|
|
|
|
if 'logging' in self._config:
|
|
for k, v in self._config['logging'].items():
|
|
if k == 'filename':
|
|
logfile = os.path.expanduser(v)
|
|
logdir = os.path.dirname(logfile)
|
|
try:
|
|
os.makedirs(logdir, exist_ok=True)
|
|
except Exception as e:
|
|
print(f'Unable to create logs directory {logdir}: {e}')
|
|
|
|
v = logfile
|
|
del logging_config['stream']
|
|
elif k == 'level':
|
|
try:
|
|
v = int(v)
|
|
except ValueError:
|
|
v = getattr(logging, v.upper())
|
|
|
|
logging_config[k] = v
|
|
|
|
self._config['logging'] = logging_config
|
|
|
|
def _init_db(self):
|
|
# Initialize the default db connection string
|
|
db_engine = self._config.get('main.db', '')
|
|
if db_engine:
|
|
if isinstance(db_engine, str):
|
|
db_engine = {
|
|
'engine': db_engine,
|
|
}
|
|
else:
|
|
db_engine = {
|
|
'engine': 'sqlite:///'
|
|
+ os.path.join(quote(self._config['workdir']), 'main.db')
|
|
}
|
|
|
|
self._config['db'] = db_engine
|
|
|
|
def _init_device_id(self):
|
|
if 'device_id' not in self._config:
|
|
self._config['device_id'] = socket.gethostname()
|
|
|
|
def _init_environment(self):
|
|
if 'environment' in self._config:
|
|
for k, v in self._config['environment'].items():
|
|
os.environ[k] = str(v)
|
|
|
|
def _init_dirs(self):
|
|
if 'workdir' not in self._config:
|
|
self._config['workdir'] = self._workdir_location
|
|
self._config['workdir'] = os.path.expanduser(self._config['workdir'])
|
|
os.makedirs(self._config['workdir'], exist_ok=True)
|
|
|
|
if 'scripts_dir' not in self._config:
|
|
self._config['scripts_dir'] = os.path.join(
|
|
os.path.dirname(self._cfgfile), 'scripts'
|
|
)
|
|
os.makedirs(self._config['scripts_dir'], mode=0o755, exist_ok=True)
|
|
|
|
if 'dashboards_dir' not in self._config:
|
|
self._config['dashboards_dir'] = os.path.join(
|
|
os.path.dirname(self._cfgfile), 'dashboards'
|
|
)
|
|
os.makedirs(self._config['dashboards_dir'], mode=0o755, exist_ok=True)
|
|
|
|
# Create a default (empty) __init__.py in the scripts folder
|
|
init_py = os.path.join(self._config['scripts_dir'], '__init__.py')
|
|
if not os.path.isfile(init_py):
|
|
with open(init_py, 'w') as f:
|
|
f.write('# Auto-generated __init__.py - do not remove\n')
|
|
|
|
# Include scripts_dir parent in sys.path so members can be imported in scripts
|
|
# through the `scripts` package
|
|
scripts_parent_dir = str(
|
|
pathlib.Path(self._config['scripts_dir']).absolute().parent
|
|
)
|
|
sys.path = [scripts_parent_dir] + sys.path
|
|
|
|
def _init_secrets(self):
|
|
if 'token' in self._config:
|
|
self._config['token_hash'] = get_hash(self._config['token'])
|
|
|
|
@property
|
|
def _core_plugins(self) -> Dict[str, dict]:
|
|
return {
|
|
'variable': {},
|
|
}
|
|
|
|
def _create_default_config(self):
|
|
cfg_mod_dir = os.path.dirname(os.path.abspath(__file__))
|
|
cfgfile = self._cfgfile_locations[0]
|
|
cfgdir = pathlib.Path(cfgfile).parent
|
|
cfgdir.mkdir(parents=True, exist_ok=True)
|
|
for cfgfile in glob.glob(os.path.join(cfg_mod_dir, 'config*.yaml')):
|
|
shutil.copy(cfgfile, str(cfgdir))
|
|
|
|
return cfgfile
|
|
|
|
def _read_config_file(self, cfgfile):
|
|
cfgfile_dir = os.path.dirname(os.path.abspath(os.path.expanduser(cfgfile)))
|
|
|
|
config = {}
|
|
|
|
try:
|
|
with open(cfgfile, 'r') as fp:
|
|
file_config = yaml.safe_load(fp)
|
|
except FileNotFoundError:
|
|
print(f'Unable to open config file {cfgfile}')
|
|
return config
|
|
|
|
if not file_config:
|
|
return config
|
|
|
|
for section in file_config:
|
|
if section == 'include':
|
|
include_files = (
|
|
file_config[section]
|
|
if isinstance(file_config[section], list)
|
|
else [file_config[section]]
|
|
)
|
|
|
|
for include_file in include_files:
|
|
if not include_file:
|
|
continue
|
|
if not os.path.isabs(include_file):
|
|
include_file = os.path.join(cfgfile_dir, include_file)
|
|
|
|
self._included_files.add(include_file)
|
|
config.update(self._read_config_file(include_file))
|
|
elif section == 'scripts_dir':
|
|
assert isinstance(file_config[section], str)
|
|
config['scripts_dir'] = os.path.abspath(
|
|
os.path.expanduser(file_config[section])
|
|
)
|
|
else:
|
|
section_config = file_config.get(section, {}) or {}
|
|
if not (
|
|
hasattr(section_config, 'get') and section_config.get('disabled')
|
|
):
|
|
config[section] = section_config
|
|
|
|
return config
|
|
|
|
def _load_module(self, modname: str, prefix: Optional[str] = None):
|
|
try:
|
|
module = importlib.import_module(modname)
|
|
except Exception as e:
|
|
print(f'Unhandled exception while importing module {modname}: {e}')
|
|
return
|
|
|
|
prefix = modname + '.' if prefix is None else prefix
|
|
self.procedures.update(
|
|
**{
|
|
prefix + name: obj
|
|
for name, obj in inspect.getmembers(module)
|
|
if is_functional_procedure(obj)
|
|
}
|
|
)
|
|
|
|
self.event_hooks.update(
|
|
**{
|
|
prefix + name: obj
|
|
for name, obj in inspect.getmembers(module)
|
|
if is_functional_hook(obj)
|
|
}
|
|
)
|
|
|
|
self.cronjobs.update(
|
|
**{
|
|
prefix + name: obj
|
|
for name, obj in inspect.getmembers(module)
|
|
if is_functional_cron(obj)
|
|
}
|
|
)
|
|
|
|
def _load_scripts(self):
|
|
scripts_dir = self._config['scripts_dir']
|
|
sys_path = sys.path.copy()
|
|
sys.path = [scripts_dir] + sys.path
|
|
scripts_modname = os.path.basename(scripts_dir)
|
|
self._load_module(scripts_modname, prefix='')
|
|
|
|
for _, modname, _ in pkgutil.walk_packages(
|
|
path=[scripts_dir], onerror=lambda _: None
|
|
):
|
|
self._load_module(modname)
|
|
|
|
sys.path = sys_path
|
|
|
|
def _init_components(self):
|
|
for key, component in self._config.items():
|
|
if (
|
|
key.startswith('backend.')
|
|
and '.'.join(key.split('.')[1:]) in self._backend_manifests
|
|
):
|
|
backend_name = '.'.join(key.split('.')[1:])
|
|
self.backends[backend_name] = component
|
|
elif key.startswith('event.hook.'):
|
|
hook_name = '.'.join(key.split('.')[2:])
|
|
self.event_hooks[hook_name] = component
|
|
elif key.startswith('cron.'):
|
|
cron_name = '.'.join(key.split('.')[1:])
|
|
self.cronjobs[cron_name] = component
|
|
elif key.startswith('procedure.'):
|
|
tokens = key.split('.')
|
|
_async = bool(len(tokens) > 2 and tokens[1] == 'async')
|
|
procedure_name = '.'.join(tokens[2:] if len(tokens) > 2 else tokens[1:])
|
|
args = []
|
|
m = re.match(r'^([^(]+)\(([^)]+)\)\s*', procedure_name)
|
|
|
|
if m:
|
|
procedure_name = m.group(1).strip()
|
|
args = [
|
|
arg.strip()
|
|
for arg in m.group(2).strip().split(',')
|
|
if arg.strip()
|
|
]
|
|
|
|
self.procedures[procedure_name] = {
|
|
'_async': _async,
|
|
'actions': component,
|
|
'args': args,
|
|
}
|
|
elif key in self._plugin_manifests:
|
|
self.plugins[key] = component
|
|
|
|
def _init_manifests(self, base_dir: Optional[str] = None):
|
|
if not base_dir:
|
|
base_dir = os.path.abspath(os.path.join(__file__, '..', '..'))
|
|
plugins_dir = os.path.join(base_dir, 'plugins')
|
|
backends_dir = os.path.join(base_dir, 'backend')
|
|
self._init_manifests(plugins_dir)
|
|
self._init_manifests(backends_dir)
|
|
else:
|
|
manifests_map = (
|
|
self._plugin_manifests
|
|
if base_dir.endswith('plugins')
|
|
else self._backend_manifests
|
|
)
|
|
for mf in pathlib.Path(base_dir).rglob('manifest.yaml'):
|
|
with open(mf, 'r') as f:
|
|
manifest = yaml.safe_load(f)['manifest']
|
|
comp_name = '.'.join(manifest['package'].split('.')[2:])
|
|
manifests_map[comp_name] = manifest
|
|
|
|
def _init_constants(self):
|
|
if 'constants' in self._config:
|
|
self.constants = self._config['constants']
|
|
|
|
for key, value in self._default_constants.items():
|
|
self.constants[key] = value
|
|
|
|
def _get_dashboard(
|
|
self, name: str, dashboards_dir: Optional[str] = None
|
|
) -> Optional[str]:
|
|
dashboards_dir = dashboards_dir or self._config['dashboards_dir']
|
|
assert dashboards_dir
|
|
abspath = os.path.join(dashboards_dir, name + '.xml')
|
|
if not os.path.isfile(abspath):
|
|
return None
|
|
|
|
with open(abspath, 'r') as fp:
|
|
return fp.read()
|
|
|
|
def _get_dashboards(self, dashboards_dir: Optional[str] = None) -> dict:
|
|
dashboards = {}
|
|
dashboards_dir = dashboards_dir or self._config['dashboards_dir']
|
|
assert dashboards_dir
|
|
|
|
for f in os.listdir(dashboards_dir):
|
|
abspath = os.path.join(dashboards_dir, f)
|
|
if not os.path.isfile(abspath) or not abspath.endswith('.xml'):
|
|
continue
|
|
|
|
name = f.split('.xml')[0]
|
|
dashboards[name] = self._get_dashboard(name, dashboards_dir)
|
|
|
|
return dashboards
|
|
|
|
@classmethod
|
|
def _get_instance(
|
|
cls, cfgfile: Optional[str] = None, force_reload: bool = False
|
|
) -> "Config":
|
|
"""
|
|
Lazy getter/setter for the default configuration instance.
|
|
"""
|
|
if force_reload or cls._instance is None:
|
|
cfg_args = [cfgfile] if cfgfile else []
|
|
cls._instance = Config(*cfg_args)
|
|
return cls._instance
|
|
|
|
@classmethod
|
|
def get_dashboard(
|
|
cls, name: str, dashboards_dir: Optional[str] = None
|
|
) -> Optional[str]:
|
|
# pylint: disable=protected-access
|
|
return cls._get_instance()._get_dashboard(name, dashboards_dir)
|
|
|
|
@classmethod
|
|
def get_dashboards(cls, dashboards_dir: Optional[str] = None) -> dict:
|
|
# pylint: disable=protected-access
|
|
return cls._get_instance()._get_dashboards(dashboards_dir)
|
|
|
|
def _init_dashboards(self, dashboards_dir: str):
|
|
self.dashboards = self._get_dashboards(dashboards_dir)
|
|
|
|
@classmethod
|
|
def get_backends(cls):
|
|
return cls._get_instance().backends
|
|
|
|
@classmethod
|
|
def get_plugins(cls):
|
|
return cls._get_instance().plugins
|
|
|
|
@classmethod
|
|
def get_event_hooks(cls):
|
|
return cls._get_instance().event_hooks
|
|
|
|
@classmethod
|
|
def get_procedures(cls):
|
|
return cls._get_instance().procedures
|
|
|
|
@classmethod
|
|
def get_constants(cls):
|
|
return {
|
|
name: Config.get_constant(name) for name in cls._get_instance().constants
|
|
}
|
|
|
|
@classmethod
|
|
def get_constant(cls, name):
|
|
value = cls._get_instance().constants.get(name)
|
|
if value is None:
|
|
return None
|
|
return value() if callable(value) else value
|
|
|
|
@classmethod
|
|
def get_cronjobs(cls):
|
|
return cls._get_instance().cronjobs
|
|
|
|
@classmethod
|
|
def _get_default_cfgfile(cls) -> Optional[str]:
|
|
for location in cls._cfgfile_locations:
|
|
if os.path.isfile(location):
|
|
return location
|
|
return None
|
|
|
|
@classmethod
|
|
def init(cls, cfgfile: Optional[str] = None):
|
|
"""
|
|
Initializes the config object singleton
|
|
Params:
|
|
cfgfile -- path to the config file - default: _cfgfile_locations
|
|
"""
|
|
return cls._get_instance(cfgfile, force_reload=True)
|
|
|
|
@classmethod
|
|
@property
|
|
def workdir(cls) -> str:
|
|
"""
|
|
:return: The path of the configured working directory.
|
|
"""
|
|
workdir = cls._get_instance().get('workdir')
|
|
assert workdir
|
|
return workdir # type: ignore
|
|
|
|
@classmethod
|
|
def get(cls, key: Optional[str] = None, default: Optional[Any] = None):
|
|
"""
|
|
Get a config value or the whole configuration object.
|
|
|
|
:param key: Configuration entry to get (default: all entries).
|
|
"""
|
|
# pylint: disable=protected-access
|
|
config = cls._get_instance()._config.copy()
|
|
if key:
|
|
return config.get(key, default)
|
|
return config
|
|
|
|
@classmethod
|
|
def set(cls, key: str, value: Any):
|
|
"""
|
|
Set a config value.
|
|
|
|
:param key: Configuration entry to set.
|
|
:param value: New value to set.
|
|
"""
|
|
# pylint: disable=protected-access
|
|
cls._get_instance()._config[key] = value
|
|
|
|
|
|
# vim:sw=4:ts=4:et:
|