# Copyright 2013-2019 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.spec import ConflictsInSpecError


yaml_cpp_tests_libcxx_error_msg = 'yaml-cpp tests incompatible with libc++'


class YamlCpp(CMakePackage):
    """A YAML parser and emitter in C++"""

    homepage = "https://github.com/jbeder/yaml-cpp"
    url      = "https://github.com/jbeder/yaml-cpp/archive/yaml-cpp-0.5.3.tar.gz"
    git      = "https://github.com/jbeder/yaml-cpp.git"

    version('develop', branch='master')
    version('0.6.2', '5b943e9af0060d0811148b037449ef82')
    version('0.5.3', '2bba14e6a7f12c7272f87d044e4a7211')

    variant('shared', default=True,
            description='Enable build of shared libraries')
    variant('pic',   default=True,
            description='Build with position independent code')
    variant('tests', default=False,
            description='Build yaml-cpp tests using internal gtest')

    depends_on('boost@:1.66.99', when='@:0.5.3')

    conflicts('%gcc@:4.7', when='@0.6.0:', msg="versions 0.6.0: require c++11 support")
    conflicts('%clang@:3.3.0', when='@0.6.0:', msg="versions 0.6.0: require c++11 support")
    # currently we can't check for apple-clang's version
    # conflicts('%clang@:4.0.0-apple', when='@0.6.0:',
    # msg="versions 0.6.0: require c++11 support")
    conflicts('%intel@:11.1', when='@0.6.0:', msg="versions 0.6.0: require c++11 support")
    conflicts('%xl@:13.1', when='@0.6.0:', msg="versions 0.6.0: require c++11 support")
    conflicts('%xl_r@:13.1', when='@0.6.0:', msg="versions 0.6.0: require c++11 support")
    conflicts('%clang cxxflags="-stdlib=libc++"', when='+tests',
              msg=yaml_cpp_tests_libcxx_error_msg)

    def flag_handler(self, name, flags):
        # We cannot catch all conflicts with the conflicts directive because
        # the user can add arbitrary strings to the flags. Here we can at least
        # fail early.
        # We'll include cppflags in case users mistakenly put c++ flags there.
        spec = self.spec
        if name in ('cxxflags', 'cppflags') and spec.satisfies('+tests'):
            if '-stdlib=libc++' in flags:
                raise ConflictsInSpecError(
                    spec,
                    [(spec,
                      spec.compiler_flags[name],
                      spec.variants['tests'],
                      yaml_cpp_tests_libcxx_error_msg)]
                )
        return (flags, None, None)

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

        options.extend([
            '-DBUILD_SHARED_LIBS:BOOL=%s' % (
                'ON' if '+shared' in spec else 'OFF'),
            '-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=%s' % (
                'ON' if '+pic' in spec else 'OFF'),
            '-DYAML_CPP_BUILD_TESTS:BOOL=%s' % (
                'ON' if '+tests' in spec else 'OFF'),
        ])

        return options