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##############################################################################
# Copyright (c) 2013-2017, 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/spack/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 spack import *
import sys
import shutil


class Graphviz(AutotoolsPackage):
    """Graph Visualization Software"""
    homepage = 'http://www.graphviz.org'
    url      = 'http://www.graphviz.org/pub/graphviz/stable/SOURCES/graphviz-2.38.0.tar.gz'

    version('2.38.0', '5b6a829b2ac94efcd5fa3c223ed6d3ae')

    # We try to leave language bindings enabled if they don't cause
    # build issues or add dependencies.
    variant('sharp', default=False,
            description='Enable for optional sharp language bindings'
            ' (not yet functional)')
    variant('go', default=False,
            description='Enable for optional go language bindings'
            ' (not yet functional)')
    variant('guile', default=False,
            description='Enable for optional guile language bindings'
            ' (not yet functional)')
    variant('io', default=False,
            description='Enable for optional io language bindings'
            ' (not yet functional)')
    variant('java', default=False,  # Spack has no Java support
            description='Enable for optional java language bindings')
    variant('lua', default=False,
            description='Enable for optional lua language bindings'
            ' (not yet functional)')
    variant('ocaml', default=False,
            description='Enable for optional ocaml language bindings'
            ' (not yet functional)')
    variant('perl', default=False,    # Spack has no Perl support
            description='Enable for optional perl language bindings')
    variant('php', default=False,
            description='Enable for optional php language bindings'
            ' (not yet functional)')
    variant('python', default=False,    # Build issues with Python 2/3
            description='Enable for optional python language bindings'
            ' (not yet functional)')
    variant('r', default=False,
            description='Enable for optional r language bindings'
            ' (not yet functional)')
    variant('ruby', default=False,
            description='Enable for optional ruby language bindings'
            ' (not yet functional)')
    variant('tcl', default=False,
            description='Enable for optional tcl language bindings'
            ' (not yet functional)')

    variant('pangocairo', default=False,
            description='Build with pango+cairo support (more output formats)')
    variant('libgd', default=False,
            description='Build with libgd support (more output formats)')

    variant('gts', default=False,
            description='Build with GNU Triangulated Surface Library')

    parallel = False

    # These language bindings have been tested, we know they work.
    tested_bindings = ('+java', )

    # These language bindings have not yet been tested.  They
    # likely need additional dependencies to get working.
    untested_bindings = (
        '+perl',
        '+sharp', '+go', '+guile', '+io',
        '+lua', '+ocaml', '+php',
        '+python', '+r', '+ruby', '+tcl')

    for b in tested_bindings + untested_bindings:
        depends_on('swig', when=b)

    depends_on('cairo', when='+pangocairo')
    depends_on('pango', when='+pangocairo')
    depends_on('libgd', when='+libgd')
    depends_on('gts', when='+gts')
    depends_on('ghostscript')
    depends_on('freetype')
    depends_on('expat')
    depends_on('libtool')
    depends_on('pkg-config', type='build')

    depends_on('java', when='+java')
    depends_on('python@2:2.8', when='+python')

    def patch(self):
        # Fix a few variable names, gs after 9.18 renamed them
        # See http://lists.linuxfromscratch.org/pipermail/blfs-book/2015-October/056960.html
        if self.spec.satisfies('^ghostscript@9.18:'):
            kwargs = {'ignore_absent': False, 'backup': True, 'string': True}
            filter_file(' e_', ' gs_error_', 'plugin/gs/gvloadimage_gs.c',
                        **kwargs)

    def configure_args(self):
        spec = self.spec
        options = []

        need_swig = False

        for var in self.untested_bindings:
            if var in spec:
                raise InstallError(
                    "The variant {0} for language bindings has not been "
                    "tested.  It might or might not work.  To try it "
                    "out, run `spack edit graphviz`, and then move '{0}' "
                    "from the `untested_bindings` list to the "
                    "`tested_bindings` list.  Be prepared to add "
                    "required dependencies.  "
                    "Please then submit a pull request to "
                    "http://github.com/spack/spack".format(var))
            options.append('--disable-%s' % var[1:])

        for var in self.tested_bindings:
            if var in spec:
                need_swig = True
                options.append('--enable-{0}'.format(var[1:]))
            else:
                options.append('--disable-{0}'.format(var[1:]))

        if need_swig:
            options.append('--enable-swig=yes')
        else:
            options.append('--enable-swig=no')

        for var in ('+pangocairo', '+libgd', '+gts'):
            if var in spec:
                options.append('--with-{0}'.format(var[1:]))
            else:
                options.append('--without-{0}'.format(var[1:]))

        # On OSX fix the compiler error:
        # In file included from tkStubLib.c:15:
        # /usr/include/tk.h:78:11: fatal error: 'X11/Xlib.h' file not found
        #       include <X11/Xlib.h>
        if sys.platform == 'darwin':
            options.append('CFLAGS=-I/opt/X11/include')

        # A hack to patch config.guess in the libltdl sub directory
        shutil.copyfile('./config/config.guess', 'libltdl/config/config.guess')

        return options