# Copyright (C) 2011,2012 Colin Walters <walters@verbum.org>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.

# ostbuild-compile-one-make wraps systems that implement the GNOME build API:
# http://people.gnome.org/~walters/docs/build-api.txt

import os,sys,stat,subprocess,tempfile,re,shutil
import argparse
from StringIO import StringIO
import json

from . import builtins
from .ostbuildlog import log, fatal
from .subprocess_helpers import run_sync, run_sync_get_output
from . import buildutil

class OstbuildBranchPrefix(builtins.Builtin):
    name = "prefix-branch"
    short_description = "Copy current source snapshot to new prefix"

    def __init__(self):
        builtins.Builtin.__init__(self)

    def execute(self, argv):
        parser = argparse.ArgumentParser(description=self.short_description)
        parser.add_argument('--prefix')
        parser.add_argument('--src-snapshot')
        parser.add_argument('newprefix')

        args = parser.parse_args(argv)
        self.parse_config()
        self.parse_snapshot(args.prefix, args.src_snapshot)

        if args.newprefix == self.prefix:
            fatal("Specified prefix %r matches active prefix" % (args.newprefix, ))

        db = self.create_db('src-snapshot', prefix=args.newprefix)

        log("Branching from source snapshot %r" % (self.snapshot_path, ))

        orig_prefix = self.prefix

        forked_snapshot = dict(self.snapshot)
        forked_snapshot['prefix'] = args.newprefix

        for target in forked_snapshot['targets']:
            name = target['name']
            if not name.startswith(orig_prefix):
                fatal("Mismatched name %r in snapshot" % (name, ))
            target['name'] = name.replace(orig_prefix, args.newprefix)
        
        path = db.store(forked_snapshot)

        log("Saved %r" % (path, ))

        run_sync(['ostbuild', 'prefix', args.newprefix],
                 log_initiation=False, log_success=False)

builtins.register(OstbuildBranchPrefix)