#!/usr/bin/env python
##############################################################################
# Copyright (c) 2013, Lawrence Livermore National Security, LLC.
# Produced at the Lawrence Livermore National Laboratory.
#
# This file is part of Spack.
# Written by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
# LLNL-CODE-647188
#
# For details, see https://github.com/llnl/spack
# Please also see the LICENSE file 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 General Public License (as published by
# the Free Software Foundation) version 2.1 dated 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 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
##############################################################################
import sys
if not 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)

import os

# Find spack's location and its prefix.
SPACK_FILE = os.path.realpath(os.path.expanduser(__file__))
os.environ["SPACK_FILE"] = SPACK_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)
SPACK_EXTERNAL_LIBS = os.path.join(SPACK_LIB_PATH, "external")
sys.path.insert(0, SPACK_EXTERNAL_LIBS)

import warnings
# Avoid warnings when nose is installed with the python exe being used to run
# spack. Note this must be done after Spack's external libs directory is added
# to sys.path.
with warnings.catch_warnings():
    warnings.filterwarnings("ignore", ".*nose was already imported")
    import nose

# 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, n)
                      for n in ('functools.pyc', 'ordereddict.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

# If there is no working directory, use the spack prefix.
try:
    working_dir = os.getcwd()
except OSError:
    os.chdir(SPACK_PREFIX)
    working_dir = SPACK_PREFIX

# clean up the scope and start using spack package instead.
del SPACK_FILE, SPACK_PREFIX, SPACK_LIB_PATH
import llnl.util.tty as tty
from llnl.util.tty.color import *
import spack
from spack.error import SpackError
from external import argparse

# Command parsing
parser = argparse.ArgumentParser(
    formatter_class=argparse.RawTextHelpFormatter,
    description="Spack: the Supercomputing PACKage Manager." + colorize("""

spec expressions:
  PACKAGE [CONSTRAINTS]

    CONSTRAINTS:
      @c{@version}
      @g{%compiler  @compiler_version}
      @B{+variant}
      @r{-variant} or @r{~variant}
      @m{=architecture}
      [^DEPENDENCY [CONSTRAINTS] ...]"""))

parser.add_argument('-d', '--debug', action='store_true',
                    help="Write out debug logs during compile")
parser.add_argument('-D', '--pdb', action='store_true',
                    help="Run spack under the pdb debugger")
parser.add_argument('-k', '--insecure', action='store_true',
                    help="Do not check ssl certificates when downloading.")
parser.add_argument('-m', '--mock', action='store_true',
                    help="Use mock packages instead of real ones.")
parser.add_argument('-p', '--profile', action='store_true',
                    help="Profile execution using cProfile.")
parser.add_argument('-v', '--verbose', action='store_true',
                    help="Print additional output during builds")
parser.add_argument('-V', '--version', action='version',
                    version="%s" % spack.spack_version)

# each command module implements a parser() function, to which we pass its
# subparser for setup.
subparsers = parser.add_subparsers(metavar='SUBCOMMAND', dest="command")

import spack.cmd
for cmd in spack.cmd.commands:
    module = spack.cmd.get_module(cmd)
    subparser = subparsers.add_parser(cmd, help=module.description)
    module.setup_parser(subparser)

# Just print help and exit if run with no arguments at all
if len(sys.argv) == 1:
    parser.print_help()
    sys.exit(1)

# actually parse the args.
args = parser.parse_args()

def main():
    # Set up environment based on args.
    tty.set_verbose(args.verbose)
    tty.set_debug(args.debug)
    spack.debug = args.debug

    if spack.debug:
        import spack.util.debug as debug
        debug.register_interrupt_handler()

    spack.spack_working_dir = working_dir
    if args.mock:
        from spack.repository import RepoPath
        spack.repo.swap(RepoPath(spack.mock_packages_path))

    # If the user asked for it, don't check ssl certs.
    if args.insecure:
        tty.warn("You asked for --insecure, which does not check SSL certificates.")
        spack.curl.add_default_arg('-k')

    # Try to load the particular command asked for and run it
    command = spack.cmd.get_command(args.command)
    try:
        return_val = command(parser, args)
    except SpackError as e:
        e.die()
    except KeyboardInterrupt:
        sys.stderr.write('\n')
        tty.die("Keyboard interrupt.")

    # Allow commands to return values if they want to exit with some other code.
    if return_val is None:
        sys.exit(0)
    elif isinstance(return_val, int):
        sys.exit(return_val)
    else:
        tty.die("Bad return value from command %s: %s" % (args.command, return_val))

if args.profile:
    import cProfile
    cProfile.run('main()', sort='tottime')
elif args.pdb:
    import pdb
    pdb.run('main()')
else:
    main()