# 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)

from spack import *


class Opam(AutotoolsPackage):
    """OPAM: OCaml Package Manager

       OPAM is a source-based package manager for OCaml. It supports
       multiple simultaneous compiler installations, flexible package
       constraints, and a Git-friendly development workflow."""

    homepage = "https://opam.ocaml.org/"
    url      = "https://github.com/ocaml/opam/releases/download/1.2.2/opam-full-1.2.2.tar.gz"

    maintainers = ['scemama']

    version('2.0.6', sha256='7c4bff5e5f3628ad00c53ee1b044ced8128ffdcfbb7582f8773fb433e12e07f4')
    version('2.0.5', sha256='776c7e64d6e24c2ef1efd1e6a71d36e007645efae94eaf860c05c1929effc76f')
    version('2.0.4', sha256='debfb828b400fb511ca290f1bfc928db91cad74ec1ccbddcfdbfeff26f7099e5')
    version('2.0.3', sha256='0589da4da184584a5445d59385009536534f60bc0e27772245b2f49e5fa8f0e2')
    version('2.0.2', sha256='eeb99fdda4b10ad3467a700fa4d1dfedb30714837d18d2faf1ef9c87d94cf0bc')
    version('2.0.1', sha256='81f7f1b661a0c1e04642fe02d0bea5524b32aa2cbed0ecf9b18d7145324ed97c')
    version('2.0.0', sha256='9dad4fcb4f53878c9daa6285d8456ccc671e21bfa71544d1f926fb8a63bfed25')
    version('1.2.2', sha256='15e617179251041f4bf3910257bbb8398db987d863dd3cfc288bdd958de58f00')
    version('1.2.1', sha256='f210ece7a2def34b486c9ccfb75de8febd64487b2ea4a14a7fa0358f37eacc3b')

    # OCaml 4.10.0 has removed the -safe-string flag, which is necessary
    # for OPAM 1i (see docstring of setup_build_environment).
    depends_on('ocaml@:4.09.0', type='build', when='@:1.2.2')
    depends_on('ocaml', type='build', when='@2.0.0:')

    parallel = False

    sanity_check_is_file = ['bin/opam']

    @when('@:1.2.2')
    def setup_build_environment(self, env):
        ''' In OCaml <4.06.1, the default was -safe-string=0, and this has
        changed in OCaml >=4.06.1. OPAM version 1 was written before 4.06.1
        was released, so OPAM <2.0 assumes mutable strings and requires the
        safe-string=0 flag. This is not true with OPAM >=2.0, so the flag
        should not be set.'''

        # Environment variable setting taken from
        # https://github.com/Homebrew/homebrew-core/blob/master/Formula/opam.rb
        env.set('OCAMLPARAM', 'safe-string=0,_')  # OCaml 4.06.0 compat

    def build(self, spec, prefix):
        make('lib-ext')
        make()
        if spec.satisfies('@:1.2.2'):
            make('man')