/stdhome : revision 6

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# command_update.py

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#

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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 CommandUpdate:

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def __init__( self ):

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self.repo = None

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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 "Update a local repository and deploy changes."

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print

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print "Files in your home directory are copied in to the local repository, the local"

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print "repository is then updated (i.e., changes made to it are pulled down and merged)"

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print "and files from the local repository are then redeployed to your home directory."

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print

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print "If any conflicts occur, either during the merge or during the redeployment, no"

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print "files will be deployed and you will be expected to manually intervene. Merge"

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print "conflicts should be dealt with the same way as you'd expect for version control."

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print "Conflicts that arise from files already existing in your home directory must be"

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print "dealt with by moving those files aside (currently)."

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print

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print "You can resume the redeployment of your repository by typing:"

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print " " + the.program.name + " resolve"

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print

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print "You can list outstanding conflicts by typing:"

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print " " + the.program.name + " conflicts"

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print

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print "Options:"

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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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[ "repo=", "verbose", "help" ] )

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for opt, optarg in opts:

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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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# initialise deployment (check it's valid)

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deployment = Deployment()

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deployment.check_ongoing( False )

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# check for local changes

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if the.repo.vcs.has_changes():

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raise the.program.FatalError(

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'repo has local changes: %s\n'

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'Hint: see "%s stage-revert --help"' %

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( the.repo.name, the.program.name ) )

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# copy-in changes to repo

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try:

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deployment.copy_in()

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except deployment.CopyInConflicts as e:

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raise the.program.FatalError(

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'Files in %s differ too severly from %s:\n %s\n' % \

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( the.fsdir, the.repo.dir, '\n '.join( e.conflicts ) ) )

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# perform vcs update

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if the.verbose: print "updating %s" % the.repo.dir

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updated_files = the.repo.vcs.update()

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message = ''

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# check for conflicts in repo

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files = the.repo.vcs.get_conflicts()

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if files:

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message += 'Conflicts in %s:\n %s' % \

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( the.repo.name, '\n '.join( files ) )

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# check for deployment conclicts

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conflicts = deployment.get_conflicts( updated_files )

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if conflicts:

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message += 'Deployment conflicts:\n %s' % \

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'\n '.join( conflicts )

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# stop if there are conflicts

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if message:

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raise the.program.FatalError(

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'there were conflicts...\n' + message )

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# copy-out changes from repo

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deployment.copy_out()

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# now we've copied-out, revert any copied-in changes!

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if the.verbose: print "reverting %s" % the.repo.dir

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the.repo.vcs.revert()