# Copyright 2013-2022 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 os

from spack.pkg.builtin.lua import LuaImplPackage
from spack.pkgkit import *


class LuaLuajitOpenresty(LuaImplPackage):
    """Flast flexible JITed lua - OpenResty maintained fork"""
    homepage = "https://openresty.org/en/luajit.html"
    url      = "https://github.com/openresty/luajit2/archive/refs/tags/v2.1-20220111.tar.gz"

    version('2.1-20220111', sha256='1ad2e34b111c802f9d0cdf019e986909123237a28c746b21295b63c9e785d9c3')

    variant('lualinks', default=True, description="add symlinks to make lua-luajit a drop-in lua replacement")

    provides("lua-lang@5.1", when="+lualinks")
    conflicts("lua", when="+lualinks")
    provides("luajit")
    lua_version_override = "5.1"

    @run_after("install")
    def install_links(self):
        self.symlink_luajit()

    @property
    def headers(self):
        hdrs = find_headers('luajit', self.prefix.include, recursive=True)
        hdrs.directories = os.path.dirname(hdrs[0])
        return hdrs or None

    def edit(self, spec, prefix):
        makefile = FileFilter('Makefile')
        makefile.filter('PREFIX= .*', 'PREFIX = {0}'.format(prefix))
        src_makefile = FileFilter(join_path('src', 'Makefile'))
        src_makefile.filter(
            '^DEFAULT_CC = .*',
            'DEFAULT_CC = {0}'.format(spack_cc))
        src_makefile.filter(
            '^DYNAMIC_CC = .*',
            'DYNAMIC_CC = $(CC) {0}'.format(self.compiler.cc_pic_flag))
        # Linking with the C++ compiler is a dirty hack to deal with the fact
        # that unwinding symbols are not included by libc, this is necessary
        # on some platforms for the final link stage to work
        src_makefile.filter(
            '^TARGET_LD = .*',
            'TARGET_LD = {0}'.format(spack_cxx))
