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from .writer import GitWriter
from tftp.backend import IBackend
from tftp.errors import Unsupported, AccessViolation
from tftp.util import deferred
from twisted.python.context import get
from twisted.python.filepath import FilePath, InsecurePath
from zope.interface import implementer
@implementer(IBackend)
class GitBackend(object):
def __init__(self, base_path):
self.base_path = base_path
self.base = FilePath(base_path)
@deferred
def get_reader(self, file_name):
raise Unsupported("Reading not supported")
@deferred
def get_writer(self, file_name):
try:
target_path = self.base.descendant(file_name.split("/"))
except InsecurePath as e:
raise AccessViolation("Insecure path: %s" % e)
return GitWriter(target_path, self.base_path, get('remote'))
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