/stdhome

# status_walker.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

from walker import Walker

import stdhome.the as the

class StatusWalker( Walker ):

	"""The status walker compares all files in the repo with those in the home

	directory and notes any that have been modified, are missing, or which have

	changed type.  It is run, for example, but the "stdhome status" comand.

	Walker source:       home dir

	Walker destination:  repo

	Walker traversing:   repo

	"""

	def __init__( self ):

		self.src_dir = the.full_fsdir

		self.dst_dir = the.repo.full_dir

		self.walk_list = self.generate_walk_list( the.repo.full_dir )

		self.modified = list()

		self.missing = list()

		self.changed = list()

	def process( self, rel_file, src_file, src_type, dst_file, dst_type ):

		# entity is missing in home dir?

		if src_type == '_':

			self.missing.append( rel_file )

			# if a directory is missing in the home dir, we only really want to

			# hear about that and not all the files it contains (which are also

			# obviously missing)

			return False

		# entity has changed type?

		elif src_type != dst_type:

			self.changed.append( "%s (now %s)" % (

				rel_file, self.name_of_type( src_type ) ) )

			# if an entity has changed to/from a directory, we don't care about

			# anything that directory does/did contain

			return False

		# entity has been modified?

		# TODO: check directory permission changes

		if dst_type == 'f':

			if not filecmp.cmp( src_file, dst_file ):

				self.modified.append( rel_file )

		elif dst_type == 'l':

			if os.readlink( src_file ) != os.readlink( dst_file ):

				self.modified.append( rel_file )

		# nothing to see here

		return True