# 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)


# Although zlib comes with a configure script, it does not use Autotools
# The AutotoolsPackage causes zlib to fail to build with PGI
class Zlib(CMakePackage):
    """A free, general-purpose, legally unencumbered lossless
    data-compression library.
    """

    homepage = "https://zlib.net"
    # URL must remain http:// so Spack can bootstrap curl
    url = "https://zlib.net/fossils/zlib-1.2.11.tar.gz"

    version('1.2.11', sha256='c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1')
    # Due to the bug fixes, any installations of 1.2.9 or 1.2.10 should be
    # immediately replaced with 1.2.11.
    version('1.2.8', sha256='36658cb768a54c1d4dec43c3116c27ed893e88b02ecfcb44f2166f9c0b7f2a0d')
    version('1.2.3', sha256='1795c7d067a43174113fdf03447532f373e1c6c57c08d61d9e4e9be5e244b05e')

    variant('pic', default=True,
            description='Produce position-independent code (for shared libs)')
    variant('shared', default=True,
            description='Enables the build of shared libraries.')
    variant('optimize', default=True,
            description='Enable -O2 for a more optimized lib')

    patch('w_patch.patch', when="@1.2.11%cce")

    @property
    def libs(self):
        shared = '+shared' in self.spec
        return find_libraries(
            ['libz'], root=self.prefix, recursive=True, shared=shared
        )

    def cmake_args(self):
        args = ['-DBUILD_SHARED_LIBS:BOOL=' +
                ('ON' if self._building_shared else 'OFF')]
        return args

    @property
    def build_directory(self):
        return join_path(self.stage.source_path,
                         'spack-build-shared' if self._building_shared
                         else 'spack-build-static')

    def setup_build_environment(self, env):
        if '+pic' in self.spec:
            env.append_flags('CFLAGS', self.compiler.cc_pic_flag)
        if '+optimize' in self.spec:
            env.append_flags('CFLAGS', '-O2')

    # Build, install, and check both static and shared versions of the
    # libraries when +shared
    @when('+shared platform=windows')
    def cmake(self, spec, prefix):
        for self._building_shared in (False, True):
            super(Zlib, self).cmake(spec, prefix)

    @when('+shared platform=windows')
    def build(self, spec, prefix):
        for self._building_shared in (False, True):
            super(Zlib, self).build(spec, prefix)

    @when('+shared platform=windows')
    def check(self):
        for self._building_shared in (False, True):
            super(Zlib, self).check()

    def install(self, spec, prefix):
        if 'platform=windows' in self.spec and '+shared' in self.spec:
            for self._building_shared in (False, True):
                super(Zlib, self).install(spec, prefix)
        else:
            config_args = []
            if '~shared' in spec:
                config_args.append('--static')
            configure('--prefix={0}'.format(prefix), *config_args)

            make()
            if self.run_tests:
                make('check')
            make('install')