##
# Copyright 2009-2013 Ghent University
#
# This file is part of EasyBuild,
# originally created by the HPC team of Ghent University (http://ugent.be/hpc/en),
# with support of Ghent University (http://ugent.be/hpc),
# the Flemish Supercomputer Centre (VSC) (https://vscentrum.be/nl/en),
# the Hercules foundation (http://www.herculesstichting.be/in_English)
# and the Department of Economy, Science and Innovation (EWI) (http://www.ewi-vlaanderen.be/en).
#
# http://github.com/hpcugent/easybuild
#
# EasyBuild 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 v2.
#
# EasyBuild 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 EasyBuild.  If not, see <http://www.gnu.org/licenses/>.
##
"""
EasyBuild support for ROOT, implemented as an easyblock

@author: Kenneth Hoste (Ghent University)
@author: Jens Timmerman (Ghent University)
"""

from easybuild.framework.easyconfig import MANDATORY
from easybuild.easyblocks.generic.configuremake import ConfigureMake
from easybuild.tools.filetools import run_cmd

class EB_ROOT(ConfigureMake):

    @staticmethod
    def extra_options():
        """
        Define extra options needed by Geant4
        """
        extra_vars = [
                      ('arch', [None, "Target architecture", MANDATORY]),
                     ]
        return ConfigureMake.extra_options(extra_vars)

    def configure_step(self):
        """Custom configuration for ROOT, add configure options."""

        self.cfg.update('configopts', "--etcdir=%s/etc/root " % self.installdir)

        cmd = "./configure %s --prefix=%s %s" % (self.cfg['arch'],
                                                 self.installdir,
                                                 self.cfg['configopts'])

        run_cmd(cmd, log_all=True, log_ok=True, simple=True)

    def make_module_extra(self):
        """Custom extra module file entries for ROOT."""
        txt = super(EB_ROOT, self).make_module_extra()

        txt += self.moduleGenerator.set_environment("ROOTSYS", "$root")
        txt += self.moduleGenerator.prepend_paths("LD_LIBRARY_PATH",["lib/root"])
        txt += self.moduleGenerator.prepend_paths("PYTHONPATH",["lib/root", "lib/root/python"])

        return txt

