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4 by Tim Marston
added more commands
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# command_stage_revert.py
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#
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# Copyright (C) 2014 Tim Marston <tim@edm.am>
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#
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# This file is part of stdhome (hereafter referred to as "this program").
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# See http://ed.am/dev/stdhome for more information.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program.  If not, see <http://www.gnu.org/licenses/>.
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import sys, re, getopt
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import the
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from deployment import Deployment
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class CommandStageRevert:
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	def __init__( self ):
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		self.repo = None
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moved copy-in, copy-out and deployment conflict checking to a set of "walkers";
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		self.force = False
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	def print_help( self ):
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		print "Usage: " + the.program.name + " update [--repo=REPO]"
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		print
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		#      01234567890123456789012345678901234567890123456789012345678901234567890123456789
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		print "Revert any modifications made to a local repository, losing those changes."
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		print
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		print "In addition to using the add and remove commands, you can also manually modify"
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		print "the files in a local repository and then commit them to a remote repository as"
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		print "required.  This can be done with the staging commands."
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		print
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		print "When files in your local repository have been modified, several of the primary"
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		print "commands of this program will not be able to function.  This command reverts all"
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		print "modifications to a local repository so that the primary commands can work again."
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		print "If you have not used any of the staging commands, it is safe to revert a local"
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		print "repository."
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		print
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		print "Options:"
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		print "      --force      disregard any ongoing deployment"
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		print "  -r, --repo=REPO  select the repo to check-out or create (defaults to 'home')"
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		print "  -v, --verbose    display information about what is being done"
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		print "      --help       display help and exit"
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		exit( 0 )
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	def parse_command_line( self ):
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		opts, args = getopt.gnu_getopt(
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			sys.argv[ 1: ], "r:v",
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			[ "force", "repo=", "verbose", "help" ] )
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		for opt, optarg in opts:
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			if opt == '--force':
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				self.force = True
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			if opt in [ '--repo', '-r' ]:
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				if not re.match( '^[-a-zA-z0-9.]+$', optarg ):
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					raise the.program.FatalError(
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						'invalid repository name: ' + optarg )
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				self.repo = optarg
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			elif opt in [ '--verbose', '-v' ]:
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				the.verbose = True
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			elif opt == "--help":
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				self.print_help()
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		# discard first argument (the command)
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		args.pop( 0 )
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		# remaining arguments
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		if len( args ):
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			raise the.program.UsageError( 'too many arguments' )
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	def run( self ):
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		# set up repo and check it exists
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		the.set_repo( self.repo )
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		the.repo.check_dir_exists()
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		# check there isn't a deployment in progress
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		deployment = Deployment()
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		if not self.force:
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			deployment.check_ongoing( False )
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		# check for local changes
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		if the.verbose: print "reverting %s" % the.repo.dir
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		the.repo.vcs.revert()
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		# remove deployment state, as necessary
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		if self.force:
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			deployment.remove_deployment_state()