kiwi-scp/kiwi_scp/instance.py

137 lines
3.8 KiB
Python

import functools
import re
import subprocess
from pathlib import Path
from typing import Generator, List, Optional, Dict, Any
import attr
from ruamel.yaml.comments import CommentedMap
from ._constants import COMPOSE_FILE_NAME, CONF_DIRECTORY_NAME
from .config import KiwiConfig, ProjectConfig
from .executable import COMPOSE_EXE
from .misc import YAML
@attr.s
class Service:
name: str = attr.ib()
content: CommentedMap = attr.ib()
parent: Optional["Project"] = attr.ib(default=None)
_RE_CONFDIR = re.compile(r"^\s*\$(?:CONFDIR|{CONFDIR})/+(.*)$", flags=re.UNICODE)
@property
def configs(self) -> Generator[Path, None, None]:
if "volumes" not in self.content:
return
for volume in self.content["volumes"]:
host_part = volume.split(":")[0]
cd_match = Service._RE_CONFDIR.match(host_part)
if cd_match:
yield Path(cd_match.group(1))
@attr.s
class Services:
content: List[Service] = attr.ib()
def __str__(self) -> str:
return YAML().dump({
"services": {
service.name: service.content
for service in self.content
}
}).strip()
def __bool__(self) -> bool:
return bool(self.content)
@property
def names(self) -> Generator[str, None, None]:
return (
service.name
for service in self.content
)
def filter_existing(self, service_names: List[str]) -> "Services":
return Services([
service
for service in self.content
if service.name in service_names
])
@attr.s
class Project:
directory: Path = attr.ib()
parent: Optional["Instance"] = attr.ib(default=None)
@staticmethod
@functools.lru_cache(maxsize=10)
def _parse_compose_file(directory: Path) -> CommentedMap:
with open(directory.joinpath(COMPOSE_FILE_NAME), "r") as cf:
return YAML().load(cf)
@property
def name(self) -> str:
return self.directory.name
@property
def config(self) -> ProjectConfig:
return self.parent.config.get_project_config(self.name)
@property
def process_kwargs(self) -> Dict[str, Any]:
directory: Path = self.directory
project_name: str = self.name
kiwi_hub_name: str = self.parent.config.network.name
target_root_dir: Path = self.parent.config.storage.directory
conf_dir: Path = target_root_dir.joinpath(CONF_DIRECTORY_NAME)
target_dir: Path = target_root_dir.joinpath(project_name)
result: Dict[str, Any] = {
"cwd": str(directory),
"env": {
"COMPOSE_PROJECT_NAME": project_name,
"KIWI_HUB_NAME": kiwi_hub_name,
"TARGETROOT": str(target_root_dir),
"CONFDIR": str(conf_dir),
"TARGETDIR": str(target_dir),
},
}
result["env"].update(self.parent.config.environment)
return result
@property
def services(self) -> Services:
yml = Project._parse_compose_file(self.directory)
return Services([
Service(name, content, self)
for name, content in yml["services"].items()
])
@attr.s(frozen=True)
class Instance:
directory: Path = attr.ib(default=Path('.'))
@property
def config(self) -> KiwiConfig:
"""shorthand: get the current configuration"""
return KiwiConfig.from_directory(self.directory)
@functools.lru_cache(maxsize=None)
def get_project(self, project_name: str) -> Optional[Project]:
for project in self.config.projects:
if project.name == project_name:
return Project(
directory=self.directory.joinpath(project.name),
parent=self,
)