thefuck/rules/dirty_untar.py
import tarfile
import os
from thefuck.utils import for_app
from thefuck.shells import shell
tar_extensions = ('.tar', '.tar.Z', '.tar.bz2', '.tar.gz', '.tar.lz',
'.tar.lzma', '.tar.xz', '.taz', '.tb2', '.tbz', '.tbz2',
'.tgz', '.tlz', '.txz', '.tz')
def _is_tar_extract(cmd):
if '--extract' in cmd:
return True
cmd = cmd.split()
return len(cmd) > 1 and 'x' in cmd[1]
def _tar_file(cmd):
for c in cmd:
for ext in tar_extensions:
if c.endswith(ext):
return (c, c[0:len(c) - len(ext)])
@for_app('tar')
def match(command):
return ('-C' not in command.script
and _is_tar_extract(command.script)
and _tar_file(command.script_parts) is not None)
def get_new_command(command):
dir = shell.quote(_tar_file(command.script_parts)[1])
return shell.and_('mkdir -p {dir}', '{cmd} -C {dir}') \
.format(dir=dir, cmd=command.script)
def side_effect(old_cmd, command):
with tarfile.TarFile(_tar_file(old_cmd.script_parts)[0]) as archive:
for file in archive.getnames():
if not os.path.abspath(file).startswith(os.getcwd()):
# it's unsafe to overwrite files outside of the current directory
continue
try:
os.remove(file)
except OSError:
# does not try to remove directories as we cannot know if they
# already existed before
pass