1 #!/usr/bin/env python 2 3 """ 4 Directory output context. 5 6 Copyright (C) 2018 Paul Boddie <paul@boddie.org.uk> 7 8 This program is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free Software 10 Foundation; either version 3 of the License, or (at your option) any later 11 version. 12 13 This program is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 15 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 16 details. 17 18 You should have received a copy of the GNU General Public License along with 19 this program. If not, see <http://www.gnu.org/licenses/>. 20 """ 21 22 from moinformat.output.common import Output 23 from os.path import abspath, commonprefix, join 24 25 def inside(filename, dirname): 26 27 "Return whether 'filename' is inside 'dirname'." 28 29 # Get the directory with trailing path separator. 30 31 dirname = join(dirname, "") 32 return commonprefix((filename, dirname)) == dirname 33 34 35 36 class DirectoryOutput(Output): 37 38 "A directory output context." 39 40 def __init__(self, filename): 41 42 "Initialise the context with the given 'filename'." 43 44 Output.__init__(self) 45 self.filename = abspath(filename) 46 47 def get_filename(self, filename): 48 49 "Return a file with the given 'filename' within the directory." 50 51 # Get the absolute path for the combination of directory and filename. 52 53 pathname = abspath(join(self.filename, filename)) 54 55 if inside(pathname, self.filename): 56 return pathname 57 else: 58 raise ValueError, filename 59 60 # vim: tabstop=4 expandtab shiftwidth=4