/stdhome

# init.py

#

# Copyright (C) 2013 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 sys, os, re, getopt, shutil, subprocess

from command import Command

import stdhome.the as the

from stdhome.deployment import Deployment

class InitCommand( Command ):

	def print_help( self ):

		print "Usage: " + the.program.name + " init [URL] [--repo=REPO]"

		print

		#      01234567890123456789012345678901234567890123456789012345678901234567890123456789

		print "Initialise a local repository."

		print

		print "If an URL is given, the local reposity is a checkout of it (i.e., you can"

		print "receive updates from it and changes you commit will be sent to it).  The URL"

		print "can take the form of a simple hostname, such as \"example.com\", or it can be a"

		print "fully-qualified bazaar URL.  (Actually, in the first case, where it is a simple"

		print "hostname, it is internally expanded to scp://HOSTNAME/~/.stdhome/REPO)."

		print

		print "Options:"

		print "  -r, --repo=REPO  select the repo to check-out or create (defaults to 'home')"

		print "  -v, --verbose    display information about what is being done"

		print "      --help       display help and exit"

		exit( 0 )

	def parse_command_line( self ):

		opts, args = getopt.gnu_getopt(

			sys.argv[ 1: ], "r:v",

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

		for opt, optarg in opts:

			if opt in [ '--repo', '-r' ]:

				if not re.match( '^[-a-zA-z0-9.]+$', optarg ):

					raise the.program.FatalError(

						'invalid repository name: ' + optarg )

				the.repo = optarg

			elif opt == "--help":

				self.print_help()

		# discard first argument (the command)

		args.pop( 0 )

		# URL argument

		self.url = args[ 0 ].strip() if len( args ) else None

		# check remaining arguments

		if len( args ) > 1:

			raise the.program.UsageError( 'too many arguments' )

	def run( self ):

		# set up repo and check it *doesn't* already exists

		the.repo.check_dir_exists( False )

		# ensure our top-level directory exists

		if not os.path.exists( the.full_dir ):

			os.mkdir( the.full_dir )

		# checkout a remote repo, or create an empty local one?

		if self.url:

			# expand url if it's a simple hostname

			if re.match( '^[0-9a-zA-z.]+$', self.url ):

				self.url = 'bzr+ssh://%s/%s/%s' % \

						   ( self.url, the.dir, the.repo.name )

			# initialise deployment (with an empty repo)

			deployment = Deployment()

			deployment.copy_in()

			# perform bzr checkout

			if the.verbose >= 1: print "checking out %s" % the.repo.dir

			try:

				the.repo.vcs.checkout( self.url )

			except Exception as e:

				# attempt to clean-up repo dir

				try:

					shutil.rmtree( the.repo.full_dir )

				except OSError:

					pass

				raise e

			message = ''

			# check for deployment conclicts

			conflicts = deployment.get_conflicts()

			if conflicts:

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

						   '\n  '.join( conflicts )

			# stop if there are conflicts

			if message:

				raise the.program.FatalError(

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

			# perform deployment

			deployment.copy_out()

		else:

			# perform bzr init

			if the.verbose >= 1: print 'initialising %s' % the.repo.dir

			try:

				the.repo.vcs.init()

			except Exception as e:

				# attempt to clean-up repo dir, and die

				try:

					shutil.rmtree( the.repo.full_dir )

				except OSError:

					pass

				raise e