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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 import the
from stdhome import util
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. The report method, which can be overridden in derived classes,
takes, in addition to the relative filename, a source file type, an
operation, and a destination file type. Valid file types are f (file), l
(symlink), d (directory) and _ (non-existant). Valid operations are *
(modify), = (skip: same), @ (skip: symlink substitute) and # (skip:
ignored).
"""
def __init__( self ):
self.check_src_symlinks = False
self.check_dst_symlinks = False
self.check_dst_ignores = False
self.report = False
def print_op( self, rel_file, src, op, dst ):
# report changes
if self.report and op == '*':
if dst == '_':
print(" N %s" % ( rel_file ))
elif src == '_':
print(" D %s" % ( rel_file ))
elif src == dst:
print(" M %s" % ( rel_file ))
else:
print(" K %s" % ( rel_file ))
def process( self, rel_file, src, dst ):
# ignore?
if self.check_dst_ignores and the.config.ignores.matches( rel_file ):
self.print_op( rel_file, src.type, '#', dst.type )
return True
# src entity is directory
if src.type == 'd':
# if dst entity doesn't exist, create it (and recurse)
if dst.type == '_':
self.print_op( rel_file, 'd', '*', '_' )
os.mkdir( dst.file )
shutil.copystat( src.file, dst.file )
return True
# if dst entity is a directory, copy permissions, as required (and
# recurse)
elif dst.type == 'd':
if os.stat( src.file ).st_mode != os.stat( dst.file ).st_mode:
self.print_op( rel_file, 'd', '*', 'd' )
shutil.copystat( src.file, dst.file )
else:
self.print_op( rel_file, 'd', '=', 'd' )
return True
# if dst entity is a symlink to a directory, and this is an
# acceptable substitute, just recurse
elif self.check_dst_symlinks and dst.link_type == 'd' and \
the.config.symlinks.matches( rel_file ):
self.print_op( 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':
self.print_op( rel_file, 'd', '*', dst.type )
os.unlink( dst.file )
shutil.copytree( src.file, dst.file, True )
else:
raise NotImplementedError()
# src entity is file
elif src.type == 'f':
# if dst entity doesn't exist, copy file
if dst.type == '_':
self.print_op( 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 ):
self.print_op( rel_file, 'f', '*', 'f' )
os.unlink( dst.file )
shutil.copy( src.file, dst.file )
shutil.copystat( src.file, dst.file )
else:
self.print_op( rel_file, 'f', '=', 'f' )
# if dst entity is a directory, replace it with file
elif dst.type == 'd':
self.print_op( 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':
self.print_op( 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
elif src.type == 'l':
# if dst entity doesn't exist, copy symlink
if dst.type == '_':
self.print_op( 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 ):
self.print_op( rel_file, 'l', '*', 'l' )
os.unlink( dst.file )
os.symlink( os.readlink( src.file ), dst.file )
else:
self.print_op( rel_file, 'l', '=', 'l' )
# if dst entity is a file, replace it with symlink
elif dst.type == 'f':
self.print_op( rel_file, 'l', '*', 'f' )
os.unlink( dst.file )
os.symlink( os.readlink( src.file ), dst.file )
# if dst entity is a directory...
elif dst.type == 'd':
# if src entity is a symlink to a directory, and this is an
# acceptable substitute, just recurse
if self.check_src_symlinks and src.link_type == 'd' and \
the.config.symlinks.matches( rel_file ):
self.print_op( rel_file, 'd', '@', 'd' )
return True
# else replace it with a symlink
self.print_op( rel_file, 'l', '*', 'd' )
shutil.rmtree( dst.file )
os.symlink( os.readlink( src.file ), dst.file )
else:
raise NotImplementedError()
# src entity is missing
elif 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
elif dst.type == 'f' or dst.type == 'l':
self.print_op( rel_file, '_', '*', dst.type )
os.unlink( dst.file )
# if dst entity is a directory, delete it
elif dst.type == 'd':
self.print_op( rel_file, '_', '*', 'd' )
shutil.rmtree( dst.file )
else:
raise NotImplementedError()
# if we got here, we don't want to recurse...
return False
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