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kiwi-scp/kiwi_scp/instance.py
2021-10-26 12:28:06 +02:00

82 lines
2 KiB
Python

import functools
import re
from pathlib import Path
from typing import List, Dict, Any, Generator
import attr
import click
import ruamel.yaml
from ._constants import COMPOSE_FILE_NAME
from .config import Config
_RE_CONFDIR = re.compile(r"^\s*\$(?:CONFDIR|{CONFDIR})/+(.*)$", flags=re.UNICODE)
@attr.s
class Service:
name: str = attr.ib()
configs: List[Path] = attr.ib()
@classmethod
def from_description(cls, name: str, description: Dict[str, Any]):
configs: List[Path] = []
if "volumes" in description:
volumes: List[str] = description["volumes"]
for volume in volumes:
host_part = volume.split(":")[0]
confdir = _RE_CONFDIR.match(host_part)
if confdir:
configs.append(Path(confdir.group(1)))
return cls(
name=name,
configs=configs,
)
@attr.s
class Project:
directory: Path = attr.ib()
services: List[Service] = attr.ib()
@classmethod
@functools.lru_cache(maxsize=10)
def from_directory(cls, directory: Path):
with open(directory.joinpath(COMPOSE_FILE_NAME), "r") as cf:
yml = ruamel.yaml.round_trip_load(cf)
return cls(
directory=directory,
services=[
Service.from_description(name, description)
for name, description in yml["services"].items()
],
)
@attr.s
class Instance:
directory: Path = attr.ib(default=Path('.'))
@property
def config(self) -> Config:
"""shorthand: get the current configuration"""
return Config.from_directory(self.directory)
def get_project(self, name: str) -> Project:
return Project.from_directory(self.directory.joinpath(name))
@property
def projects(self) -> Generator[Project, None, None]:
return (
self.get_project(project.name)
for project in self.config.projects
)
pass_instance = click.make_pass_decorator(Instance, ensure=True)