#!/usr/bin/env python
##############################################################################
# Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
# Produced at the Lawrence Livermore National Laboratory.
#
# This file is part of Spack.
# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
# LLNL-CODE-647188
#
# For details, see https://github.com/llnl/spack
# Please also see the NOTICE and LICENSE files for our notice and the LGPL.
#
# This program 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) version 2.1, February 1999.
#
# 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 terms and
# conditions of 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 program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##############################################################################
from __future__ import print_function

import os
import sys

if sys.version_info[:2] < (2, 6):
    v_info = sys.version_info[:3]
    sys.exit("Spack requires Python 2.6 or higher."
             "This is Python %d.%d.%d." % v_info)

# Find spack's location and its prefix.
spack_file = os.path.realpath(os.path.expanduser(__file__))
spack_prefix = os.path.dirname(os.path.dirname(spack_file))

# Allow spack libs to be imported in our scripts
spack_lib_path = os.path.join(spack_prefix, "lib", "spack")
sys.path.insert(0, spack_lib_path)

# Add external libs
spack_external_libs = os.path.join(spack_lib_path, "external")
sys.path.insert(0, spack_external_libs)

# Handle vendoring of YAML specially, as it has two versions.
if sys.version_info[0] == 2:
    spack_yaml_libs = os.path.join(spack_external_libs, "yaml/lib")
else:
    spack_yaml_libs = os.path.join(spack_external_libs, "yaml/lib3")
sys.path.insert(0, spack_yaml_libs)

# Quick and dirty check to clean orphaned .pyc files left over from
# previous revisions.  These files were present in earlier versions of
# Spack, were removed, but shadow system modules that Spack still
# imports.  If we leave them, Spack will fail in mysterious ways.
# TODO: more elegant solution for orphaned pyc files.
orphaned_pyc_files = [
    os.path.join(spack_external_libs, 'functools.pyc'),
    os.path.join(spack_external_libs, 'ordereddict.pyc'),
    os.path.join(spack_lib_path, 'spack', 'platforms', 'cray_xc.pyc'),
    os.path.join(spack_lib_path, 'spack', 'cmd', 'package-list.pyc'),
    os.path.join(spack_lib_path, 'spack', 'cmd', 'test-install.pyc'),
    os.path.join(spack_lib_path, 'spack', 'cmd', 'url-parse.pyc'),
    os.path.join(spack_lib_path, 'spack', 'test', 'yaml.pyc')
]

for pyc_file in orphaned_pyc_files:
    if not os.path.exists(pyc_file):
        continue
    try:
        os.remove(pyc_file)
    except OSError as e:
        print("WARNING: Spack may fail mysteriously. "
              "Couldn't remove orphaned .pyc file: %s" % pyc_file)

# Once we've set up the system path, run the spack main method
import spack.main  # noqa
sys.exit(spack.main.main())