thefuck/rules/cd_correction.py
"""Attempts to spellcheck and correct failed cd commands"""
import os
import six
from thefuck.specific.sudo import sudo_support
from thefuck.rules import cd_mkdir
from thefuck.utils import for_app, get_close_matches
__author__ = "mmussomele"
MAX_ALLOWED_DIFF = 0.6
def _get_sub_dirs(parent):
"""Returns a list of the child directories of the given parent directory"""
return [child for child in os.listdir(parent) if os.path.isdir(os.path.join(parent, child))]
@sudo_support
@for_app('cd')
def match(command):
"""Match function copied from cd_mkdir.py"""
return (
command.script.startswith('cd ') and any((
'no such file or directory' in command.output.lower(),
'cd: can\'t cd to' in command.output.lower(),
'does not exist' in command.output.lower()
)))
@sudo_support
def get_new_command(command):
"""
Attempt to rebuild the path string by spellchecking the directories.
If it fails (i.e. no directories are a close enough match), then it
defaults to the rules of cd_mkdir.
Change sensitivity by changing MAX_ALLOWED_DIFF. Default value is 0.6
"""
dest = command.script_parts[1].split(os.sep)
if dest[-1] == '':
dest = dest[:-1]
if dest[0] == '':
cwd = os.sep
dest = dest[1:]
elif six.PY2:
cwd = os.getcwdu()
else:
cwd = os.getcwd()
for directory in dest:
if directory == ".":
continue
elif directory == "..":
cwd = os.path.split(cwd)[0]
continue
best_matches = get_close_matches(directory, _get_sub_dirs(cwd), cutoff=MAX_ALLOWED_DIFF)
if best_matches:
cwd = os.path.join(cwd, best_matches[0])
else:
return cd_mkdir.get_new_command(command)
return u'cd "{0}"'.format(cwd)