/stdhome

# add.py

#

# Copyright (C) 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 sys, re, getopt, os

from command import Command

import stdhome.the as the

from stdhome.deployment import Deployment

from stdhome.walker.copy_in import CopyInWalker

class AddCommand( Command ):

	def print_help( self ):

		print "Usage: " + the.program.name + " add [--repo=REPO] FILE..."

		print

		#      01234567890123456789012345678901234567890123456789012345678901234567890123456789

		print "Add (or update) a file in the repository."

		print

		print "Add a named file from the local filesystem, specified relative to the home"

		print "directory, to the repo, or update an existing file in the repo with your local"

		print "changes.  Directories can also be added, but note that they are not added"

		print "recursively (as is common with version control)."

		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.search( '^[-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 )

		# check remaining arguments

		if len( args ) < 1:

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

		# files arguments

		self.files = args

	def run( self ):

		# set up repo and check it exists

		the.repo.check_dir_exists()

		# determine files

		files = self.expand_home_dir_files( self.files )

		# initialise deployment and ensure it's not ongoing

		deployment = Deployment()

		deployment.check_ongoing( False )

		# check for local changes

		if the.repo.vcs.has_changes():

			raise the.program.FatalError(

				'repo has local changes: %s\n'

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

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

		# check status

		walker = CopyInWalker( files )

		walker.walk()

		# make sure all files are added to version control

		if the.verbose >= 1: print "adding files"

		the.repo.vcs.add( files )

		# commit repo

		if the.verbose >= 1: print "committing " + the.repo.dir

		the.repo.vcs.commit()

	@staticmethod

	def expand_home_dir_files( files ):

		"""Returns a unique, sorted list of relative filenames, calculated from the list

		provided, which is made up from individual files and directories

		relative to the CWD.  Directories and are not recursed in to, but

		leading path components are also returned.  Specified filenames must

		exist in the home directory (although they may not exist in the repo).

		"""

		ret = set()

		home_dir_prefix = os.path.realpath( the.full_home_dir ) + os.sep

		# iterate through file list

		for file in files:

			parts = os.path.split( file )

			abs_file = os.path.join(

				os.path.realpath( parts[ 0 ] ), parts[ 1 ] )

			# check the file is in the home directory

			if abs_file[ : len( home_dir_prefix ) ] != home_dir_prefix:

				raise the.program.FatalError(

					'not under home directory: %s' % abs_file )

			# relative file

			rel_file = abs_file[ len( home_dir_prefix ) : ]

			# check if file exists in home directory

			if not os.path.lexists( abs_file ):

				raise the.program.FatalError(

					'not found in home directory: %s' % rel_file )

			# append path parts

			path = rel_file

			while True:

				path, dummy = os.path.split( path )

				if len( path ): ret.add( path )

				else: break

			# append the file or directory

			ret.add( rel_file )

		return sorted( ret )