baseimage-tutorial-framework/lib/tfw/components/file_manager/file_manager.py

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2019-05-20 12:52:02 +00:00
from typing import Iterable
from glob import glob
from fnmatch import fnmatchcase
from os.path import basename, isfile, join, relpath, exists, isdir, realpath
class FileManager: # pylint: disable=too-many-instance-attributes
def __init__(self, working_directory, allowed_directories, selected_file=None, exclude=None):
self._exclude, self.exclude = [], exclude
self._allowed_directories, self.allowed_directories = None, allowed_directories
self._workdir, self.workdir = None, working_directory
self._filename, self.filename = None, selected_file or self.files[0]
@property
def exclude(self):
return self._exclude
@exclude.setter
def exclude(self, exclude):
if exclude is None:
return
if not isinstance(exclude, Iterable):
raise TypeError('Exclude must be Iterable!')
self._exclude = exclude
@property
def workdir(self):
return self._workdir
@workdir.setter
def workdir(self, directory):
if not exists(directory) or not isdir(directory):
raise EnvironmentError(f'"{directory}" is not a directory!')
if not self._is_in_allowed_dir(directory):
raise EnvironmentError(f'Directory "{directory}" is not allowed!')
self._workdir = directory
@property
def allowed_directories(self):
return self._allowed_directories
@allowed_directories.setter
def allowed_directories(self, directories):
self._allowed_directories = [realpath(directory) for directory in directories]
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@property
def filename(self):
return self._filename
@filename.setter
def filename(self, filename):
if filename not in self.files:
raise EnvironmentError('No such file in workdir!')
self._filename = filename
@property
def files(self):
return [
self._relpath(file)
for file in glob(join(self._workdir, '**/*'), recursive=True)
if isfile(file)
and self._is_in_allowed_dir(file)
and not self._is_blacklisted(file)
]
@property
def file_contents(self):
with open(self._filepath(self.filename), 'r', errors='surrogateescape') as ifile:
return ifile.read()
@file_contents.setter
def file_contents(self, value):
with open(self._filepath(self.filename), 'w', errors='surrogateescape') as ofile:
ofile.write(value)
def _is_in_allowed_dir(self, path):
return any(
realpath(path).startswith(allowed_dir)
for allowed_dir in self.allowed_directories
)
def _is_blacklisted(self, file):
return any(
fnmatchcase(file, blacklisted) or
fnmatchcase(basename(file), blacklisted)
for blacklisted in self.exclude
)
def _filepath(self, filename):
return join(self._workdir, filename)
def _relpath(self, filename):
return relpath(self._filepath(filename), start=self._workdir)