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# file.py - local file-based back-end for repository storage
#
# Copyright (C) 2015 Arthur de Jong
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# The files produced as output from the software do not automatically fall
# under the copyright of the software, unless explicitly stated otherwise.
import os
class FileBackend(object):
def __init__(self, path):
self.path = path
# FIXME: check that path exists
def listdir(self, path):
"""Return the names of all the enties in the directory."""
try:
return (
os.path.join(path, name)
for name in os.listdir(os.path.join(self.path, path)))
except:
return ()
def exists(self, path):
return os.path.exists(os.path.join(self.path, path))
def isdir(self, path):
return os.path.isdir(os.path.join(self.path, path))
def remove(self, path, recurse=False):
# TODO: this only recurses one directory deep and will fail if
# the directory contains other directories
if recurse:
for subpath in self.listdir(path):
os.remove(os.path.join(self.path, subpath))
os.rmdir(os.path.join(self.path, path))
else:
os.remove(os.path.join(self.path, path))
def rename(self, old, new):
if self.exists(new):
self.remove(new)
os.rename(os.path.join(self.path, old), os.path.join(self.path, new))
def put(self, filename, executable=False):
"""Return an open file handle that can be used to write a file
contents to."""
path = os.path.join(self.path, filename)
dirname = os.path.dirname(path)
if not os.path.isdir(dirname):
os.makedirs(dirname)
f = open(path, 'wb')
if executable:
os.fchmod(f.fileno(), 0o0755)
return f
def get(self, filename):
"""Returns an open file handle that can be used to read from."""
path = os.path.join(self.path, filename)
return open(path, 'rb')
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