# Fedora Developer Shell
#
# 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; version 2 of the License.
#
# 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 Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Authors: Yaakov M. Nemoy <ynemoy@redhat.com>
#

import base.factories as factories

from base.factories import DirFactory
from base.module import Module

class MetaBuildSystem(type):
    def __init__(cls, name, bases, attrs):
        t = name.lower()
        cls._type = t
        factories.register_buildsystem(cls, t)

class BuildSystem(Module):
    __metaclass__ = MetaBuildSystem
    def __init__(self, name):
        if type(name) is str:
            self.pkg_src = DirFactory(name)
            self.name = name
        else:
            self.pkg_src = name
            self.name = name.name

    def configure(self, target='home', *args):
        '''runs the configure stage of cabal
        
        target is either 'home' or 'root' and will configure the package to
        install either to the user's home directory, or to the system
        wide haskell.

        Some help is needed making this more flexible
        '''
        raise NotImplementedError

    def build(self, *args):
        '''runs the build stage of cabal

        This is not safe to run on an unconfigured source dir, because
        this module does not track the state of cabal systems. The user
        must do this on their own.
        '''
        raise NotImplementedError

    def install(self, *args):
        '''runs the install stage of cabal

        This is not safe to run on an unconfigured source dir, because
        this module does not track the state of cabal systems. The user
        must do this on their own.
        '''
        raise NotImplementedError

    def install_source(self, target='home', *args):
        '''perform configure, build, and install steps in one
        '''
        raise NotImplementedError

    def gen_spec(self):
        raise NotImplementedError