old_contents: # Copyright 2013-2020 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 Libssh(CMakePackage):
      """libssh: the SSH library"""
  
      homepage = "https://www.libssh.org"
      url      = "https://www.libssh.org/files/0.8/libssh-0.8.5.tar.xz"
  
      version('0.8.5', sha256='07d2c431240fc88f6b06bcb36ae267f9afeedce2e32f6c42f8844b205ab5a335')
      version('0.7.5', sha256='54e86dd5dc20e5367e58f3caab337ce37675f863f80df85b6b1614966a337095')
  
      depends_on('openssl@:1.0', when='@:0.7')
      depends_on('openssl')
      depends_on('zlib')
  
      def url_for_version(self, version):
          url = "https://www.libssh.org/files/{0}/libssh-{1}.tar.xz"
          return url.format(version.up_to(2), version)
  
new_contents: # Copyright 2013-2020 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 Libssh(CMakePackage):
      """libssh: the SSH library"""
  
      homepage = "https://www.libssh.org"
      url      = "https://www.libssh.org/files/0.8/libssh-0.8.5.tar.xz"
  
      version('0.8.5', sha256='07d2c431240fc88f6b06bcb36ae267f9afeedce2e32f6c42f8844b205ab5a335')
      version('0.7.5', sha256='54e86dd5dc20e5367e58f3caab337ce37675f863f80df85b6b1614966a337095')
  
      variant("gssapi", default=True, description="Build with gssapi support")
      depends_on('openssl@:1.0', when='@:0.7')
      depends_on('openssl')
      depends_on('zlib')
      depends_on('krb5', when='+gssapi')
  
      def url_for_version(self, version):
          url = "https://www.libssh.org/files/{0}/libssh-{1}.tar.xz"
          return url.format(version.up_to(2), version)
  
      def cmake_args(self):
          args = ['-DWITH_GSSAPI=%s' %
                  ('ON' if '+gssapi' in self.spec else 'OFF')]
          return args
  
subject: add gssapi variant and include krb5 as a dependency accordingly (#18070)