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kiwi-scp/kiwi_scp/instance.py

86 lines
2.3 KiB
Python

import functools
import re
from pathlib import Path
from typing import Generator, List, Tuple, Optional
import attr
import click
from ruamel.yaml.comments import CommentedMap
from ._constants import COMPOSE_FILE_NAME
from .config import KiwiConfig
from .misc import YAML
_RE_CONFDIR = re.compile(r"^\s*\$(?:CONFDIR|{CONFDIR})/+(.*)$", flags=re.UNICODE)
@attr.s
class Service:
name: str = attr.ib()
description: CommentedMap = attr.ib()
def __str__(self) -> str:
return YAML().dump({
"service": {
self.name: self.description
}
}).strip()
@property
def configs(self) -> Generator[Path, None, None]:
if "volumes" not in self.description:
return
for volume in self.description["volumes"]:
host_part = volume.split(":")[0]
cd_match = _RE_CONFDIR.match(host_part)
if cd_match:
yield Path(cd_match.group(1))
@attr.s
class Services:
project_name: str = attr.ib()
content: List[Service] = attr.ib()
def __str__(self) -> str:
return YAML().dump({
"services": {
service.name: service.description
for service in self.content
}
}).strip()
@attr.s
class Instance:
directory: Path = attr.ib(default=Path('.'))
@property
def config(self) -> KiwiConfig:
"""shorthand: get the current configuration"""
return KiwiConfig.from_directory(self.directory)
@staticmethod
@functools.lru_cache(maxsize=10)
def _parse_compose_file(directory: Path):
with open(directory.joinpath(COMPOSE_FILE_NAME), "r") as cf:
return YAML().load(cf)
def get_services(self, project_name: str, service_names: Optional[Tuple[str]] = None) -> Services:
yml = Instance._parse_compose_file(self.directory.joinpath(project_name))
services = [
Service(name, description)
for name, description in yml["services"].items()
]
if not service_names:
return Services(project_name, services)
else:
return Services(project_name, [
service
for service in services
if service.name in service_names
])