ssh kitten: Allow using absolute paths for the location of transferred data

Fixes #5607

kittens/ssh/options/definition.py

@@ -40,10 +40,9 @@ shell or a :program:`python` executable. If the default :program:`sh` is not
 available or broken, using an alternate interpreter can be useful.
 ''')
 
-opt('remote_dir', '.local/share/kitty-ssh-kitten', option_type='relative_dir', long_text='''
+opt('remote_dir', '.local/share/kitty-ssh-kitten', long_text='''
 The location on the remote host where the files needed for this kitten are
-installed. The location is relative to the HOME directory. Absolute paths or
-paths that resolve to a location outside the HOME are not allowed.
+installed. Relative paths are resolved with respect to :code:`$HOME`.
 ''')
 
 opt('+copy', '', option_type='copy', add_to_default=False, long_text=f'''

kittens/ssh/options/utils.py

@@ -1,7 +1,6 @@
 #!/usr/bin/env python
 # License: GPLv3 Copyright: 2022, Kovid Goyal <kovid at kovidgoyal.net>
 
-import posixpath
 from typing import Any, Dict, Iterable, Optional, Tuple
 
 from ..copy import CopyInstruction, parse_copy_instructions
@@ -9,16 +8,6 @@ from ..copy import CopyInstruction, parse_copy_instructions
 DELETE_ENV_VAR = '_delete_this_env_var_'
 
 
-def relative_dir(val: str) -> str:
-    if posixpath.isabs(val):
-        raise ValueError(f'Absolute paths not allowed. {val} is invalid.')
-    base = '/ffjdg'
-    q = posixpath.normpath(posixpath.join(base, val))
-    if q == base or not q.startswith(base):
-        raise ValueError(f'Paths that escape their parent dir are not allowed. {val} is not valid')
-    return posixpath.normpath(val)
-
-
 def env(val: str, current_val: Dict[str, str]) -> Iterable[Tuple[str, str]]:
     val = val.strip()
     if val: