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# copy_base.py
#
# Copyright (C) 2013 to 2014 Tim Marston <tim@edm.am>
#
# This file is part of stdhome (hereafter referred to as "this program").
# See http://ed.am/dev/stdhome for more information.
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
import filecmp, os, shutil
from walker import Walker
from stdhome.file_matcher import FileMatcher
import stdhome.the as the
class CopyBaseWalker( Walker ):
"""The copy-base walker traverses a walklist ruthlessly mirroring src to dst.
It is designed to be the base class of both the copy-in and copy-out walker,
both of which are specialisations of this purpose. See them for more
information.
"""
def __init__( self, updated_files = None ):
self.accept_list = FileMatcher()
def process( self, rel_file, src, dst ):
# src entity is directory
if src.type == 'd':
# if dst entity doesn't exist, create directory (no need to recurse,
# since we're copying the whole directory)
if dst.type == '_':
if the.verbose > 1: self.print_cp( rel_file, 'd', '_' )
os.mkdir( dst.file )
shutil.copystat( src.file, dst.file )
return False
# if dst entity is a directory, copy permissions, as required (and
# recurse)
elif dst.type == 'd':
# TODO: should check permission and only do as necessary
if the.verbose > 1: self.print_cp( rel_file, 'd', 'd' )
shutil.copystat( src.file, dst.file )
return True
# TODO: if dst entity is a symlink to a directory, and rel_file is
# matched by the acceptable symlinks file matcher, just recurse
# elif dst.link_type == 'd' and self.accept_list.match( rel_file ):
# if the.verbose > 1: self.print_cp( rel_file, 'd', 'd', '@' )
# return True
# if dst entity is a file or symlink in home dir, replace it with
# directory (no need to recurse, since we're copying the whole
# directory)
elif dst.type == 'f' or dst.type == 'l':
if the.verbose > 1: self.print_cp( rel_file, 'd', dst.type )
os.unlink( dst.file )
os.mkdir( dst.file )
shutil.copystat( src.file, dst.file )
return False
else:
raise NotImplementedError()
# src entity is file
if src.type == 'f':
# if dst entity doesn't exist, copy file
if dst.type == '_':
if the.verbose > 1: self.print_cp( rel_file, 'f', '_' )
shutil.copy( src.file, dst.file )
shutil.copystat( src.file, dst.file )
# if dst entity is a file, replace it only if it differs
elif dst.type == 'f':
if not filecmp.cmp( src.file, dst.file ):
if the.verbose > 1: self.print_cp( rel_file, 'f', 'f' )
os.unlink( dst.file )
shutil.copy( src.file, dst.file )
shutil.copystat( src.file, dst.file )
else:
if the.verbose > 1: self.print_cp( rel_file, 'f', 'f', '=' )
# if dst entity is a directory, replace it with file
elif dst.type == 'd':
if the.verbose > 1: self.print_cp( rel_file, 'f', 'd' )
shutil.rmtree( dst.file )
shutil.copy( src.file, dst.file )
shutil.copystat( src.file, dst.file )
# if dst entity is a symlink, replace it with file
elif dst.type == 'l':
if the.verbose > 1: self.print_cp( rel_file, 'f', 'l' )
os.unlink( dst.file )
shutil.copy( src.file, dst.file )
shutil.copystat( src.file, dst.file )
else:
raise NotImplementedError()
# src entity is a symlink
if src.type == 'l':
# if dst entity doesn't exist, copy symlink
if dst.type == '_':
if the.verbose > 1: self.print_cp( rel_file, 'l', '_' )
os.symlink( os.readlink( src.file ), dst.file )
# if dst entity is a symlink, replace it only if it differs
elif dst.type == 'l':
if os.readlink( src.file ) != os.readlink( dst.file ):
if the.verbose > 1: self.print_cp( rel_file, 'l', 'l' )
os.unlink( dst.file )
os.symlink( os.readlink( src.file ), dst.file )
else:
if the.verbose > 1: self.print_cp( rel_file, 'l', 'l', '=' )
# if dst entity is a file, replace it with symlink
elif dst.type == 'f':
if the.verbose > 1: self.print_cp( rel_file, 'l', 'f' )
os.unlink( dst.file )
os.symlink( os.readlink( src.file ), dst.file )
# if dst entity is a directory, replace it with symlink
elif dst.type == 'd':
if the.verbose > 1: self.print_cp( rel_file, 'l', 'd' )
shutil.rmtree( dst.file )
os.symlink( os.readlink( src.file ), dst.file )
else:
raise NotImplementedError()
# src entity is missing
if src.type == '_':
# if dst entity doesn't exist, we're good
if dst.type == '_':
pass;
# if dst entity is a file or symlink, delete it
if dst.type == 'f' or dst.type == 'l':
if the.verbose > 1: self.print_cp( rel_file, '_', dst.type )
os.unlink( dst.file )
# if dst entity is a directory, delete it
elif dst.type == 'd':
if the.verbose > 1: self.print_cp( rel_file, '_', 'd' )
shutil.rmtree( dst.file )
else:
raise NotImplementedError()
# non-directories can not be recursed in to
return False
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