# Copyright 2013-2021 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

import re

from spack import *


class Groff(AutotoolsPackage, GNUMirrorPackage):
    """Groff (GNU troff) is a typesetting system that reads
    plain text mixed with formatting commands and produces
    formatted output. Output may be PostScript or PDF, html, or
    ASCII/UTF8 for display at the terminal."""

    homepage = "https://www.gnu.org/software/groff/"
    gnu_mirror_path = "groff/groff-1.22.3.tar.gz"

    version('1.22.4', sha256='e78e7b4cb7dec310849004fa88847c44701e8d133b5d4c13057d876c1bad0293')
    version('1.22.3', sha256='3a48a9d6c97750bfbd535feeb5be0111db6406ddb7bb79fc680809cda6d828a5')

    # TODO: add html variant, spack doesn't have netpbm and its too
    # complicated for me to find out at this point in time.
    # See brew scripts for groff for guidance:
    # https://github.com/Homebrew/homebrew-core/blob/master/Formula/groff.rb
    # Seems troublesome...netpbm requires groff?
    variant('pdf', default=True, description='Build the `gropdf` executable.')
    variant('x', default=False, description='Enable set of graphical options')
    variant('uchardet', default=True,
            description='Builds preconv with uchardet library for '
                        'automatic file encoding detection')

    conflicts('+uchardet', when='@:1.22.3')

    depends_on('gawk',  type='build')
    depends_on('gmake', type='build')
    depends_on('sed',   type='build')
    depends_on('ghostscript', when='+pdf')
    # iconv is being asked whatever the release
    depends_on('iconv')
    # makeinfo is being searched for
    depends_on('texinfo', type='build', when='@1.22.4:')
    # configure complains when there is no uchardet that enhances preconv
    depends_on('uchardet', when='@1.22.4:')

    depends_on('libice', when='+x')
    depends_on('libxaw', when='+x')
    depends_on('libxmu', when='+x')
    depends_on('libx11', when='+x')

    # The perl interpreter line in scripts might be too long as it has
    # not been transformed yet. Call scripts with spack perl explicitly.
    patch('BuildFoundries.patch', when='@1.22.3')
    patch('pdfmom.patch', when='@1.22.3')

    executables = ['^groff$']

    @property
    def parallel(self):
        return False

    @classmethod
    def determine_version(cls, exe):
        output = Executable(exe)('--version', output=str, error=str)
        match = re.search(r'GNU groff version\s+(\S+)', output)
        return match.group(1) if match else None

    def configure_args(self):
        args = ['--disable-silent-rules']
        args.extend(self.with_or_without('x'))
        if '@1.22.4:' in self.spec:
            args.extend(self.with_or_without('uchardet'))
        args.append('--with-libiconv-prefix={0}'.format(self.spec['iconv'].prefix))
        return args

    def setup_run_environment(self, env):
        if self.spec.satisfies('+x'):
            dir = join_path(self.prefix.lib, 'X11', 'app-defaults')
            env.set_path('XFILESEARCHPATH', dir)
