Start work on config infrastructure for ssh kitten

kittens/ssh/config.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python
+# License: GPLv3 Copyright: 2022, Kovid Goyal <kovid at kovidgoyal.net>
+
+
+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 load_config(*paths: str, overrides: Optional[Iterable[str]] = None) -> Dict[str, SSHOptions]:
+    from .options.parse import (
+        create_result_dict, merge_result_dicts, parse_conf_item
+    )
+    from .options.utils import init_results_dict
+
+    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 ()
+    opts_dict, paths = _load_config(defaults, parse_config, merge_result_dicts, *paths, overrides=overrides)
+    ans: Dict[str, SSHOptions] = {}
+    for hostname, host_opts_dict in opts_dict['per_host_dicts'].items():
+        opts = SSHOptions(host_opts_dict)
+        opts.config_paths = paths
+        opts.config_overrides = overrides
+        ans[hostname] = opts
+    return ans
+
+
+def init_config() -> Dict[str, SSHOptions]:
+    config = tuple(resolve_config(SYSTEM_CONF, defconf))
+    opts_dict = load_config(*config)
+    return opts_dict