kitty/kittens/ssh/config.py
Kovid Goyal 54c5faa12d
Simplify hostname matching
Now that we load the opts upfront, we can have load_config return the
final opts object itself
2022-03-15 11:25:21 +05:30

75 lines
2.7 KiB
Python

#!/usr/bin/env python
# License: GPLv3 Copyright: 2022, Kovid Goyal <kovid at kovidgoyal.net>
import fnmatch
import os
from typing import Any, Dict, Iterable, Optional
from kitty.conf.utils import (
load_config as _load_config, parse_config_base, resolve_config
)
from kitty.constants import config_dir
from .options.types import Options as SSHOptions, defaults
SYSTEM_CONF = '/etc/xdg/kitty/ssh.conf'
defconf = os.path.join(config_dir, 'ssh.conf')
def host_matches(mpat: str, hostname: str, username: str) -> bool:
for pat in mpat.split():
upat = '*'
if '@' in pat:
upat, pat = pat.split('@', 1)
if fnmatch.fnmatchcase(hostname, pat) and fnmatch.fnmatchcase(username, upat):
return True
return False
def load_config(*paths: str, overrides: Optional[Iterable[str]] = None, hostname: str = '!', username: str = '') -> SSHOptions:
from .options.parse import (
create_result_dict, merge_result_dicts, parse_conf_item
)
from .options.utils import (
first_seen_positions, get_per_hosts_dict, init_results_dict
)
def merge_dicts(base: Dict[str, Any], vals: Dict[str, Any]) -> Dict[str, Any]:
base_phd = get_per_hosts_dict(base)
vals_phd = get_per_hosts_dict(vals)
for hostname in base_phd:
vals_phd[hostname] = merge_result_dicts(base_phd[hostname], vals_phd.get(hostname, {}))
ans: Dict[str, Any] = vals_phd.pop(vals['hostname'])
ans['per_host_dicts'] = vals_phd
return ans
def parse_config(lines: Iterable[str]) -> Dict[str, Any]:
ans: Dict[str, Any] = init_results_dict(create_result_dict())
parse_config_base(lines, parse_conf_item, ans)
return ans
overrides = tuple(overrides) if overrides is not None else ()
first_seen_positions.clear()
first_seen_positions['*'] = 0
opts_dict, paths = _load_config(
defaults, parse_config, merge_dicts, *paths, overrides=overrides, initialize_defaults=init_results_dict)
phd = get_per_hosts_dict(opts_dict)
final_dict: Dict[str, Any] = {}
for hostname_pat in sorted(phd, key=first_seen_positions.__getitem__):
if host_matches(hostname_pat, hostname, username):
od = phd[hostname_pat]
for k, v in od.items():
if isinstance(v, dict):
bv = final_dict.setdefault(k, {})
bv.update(v)
else:
final_dict[k] = v
first_seen_positions.clear()
return SSHOptions(final_dict)
def init_config(hostname: str, username: str, overrides: Optional[Iterable[str]] = None) -> SSHOptions:
config = tuple(resolve_config(SYSTEM_CONF, defconf))
return load_config(*config, overrides=overrides, hostname=hostname, username=username)