text: # 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 Bzip2(Package):
      """bzip2 is a freely available, patent free high-quality data
      compressor. It typically compresses files to within 10% to 15%
      of the best available techniques (the PPM family of statistical
      compressors), whilst being around twice as fast at compression
      and six times faster at decompression."""
  
      homepage = "https://sourceware.org/bzip2/"
      url      = "https://sourceware.org/pub/bzip2/bzip2-1.0.8.tar.gz"
  
      version('1.0.8', sha256='ab5a03176ee106d3f0fa90e381da478ddae405918153cca248e682cd0c4a2269')
      version('1.0.7', sha256='e768a87c5b1a79511499beb41500bcc4caf203726fff46a6f5f9ad27fe08ab2b')
      version('1.0.6', sha256='a2848f34fcd5d6cf47def00461fcb528a0484d8edef8208d6d2e2909dc61d9cd')
  
      variant('shared', default=True, description='Enables the build of shared libraries.')
  
      depends_on('diffutils', type='build')
  
      # override default implementation
      @property
      def libs(self):
          shared = '+shared' in self.spec
          return find_libraries(
              'libbz2', root=self.prefix, shared=shared, recursive=True
          )
  
      def patch(self):
          # bzip2 comes with two separate Makefiles for static and dynamic builds
          # Tell both to use Spack's compiler wrapper instead of GCC
          filter_file(r'^CC=gcc', 'CC={0}'.format(spack_cc), 'Makefile')
          filter_file(
              r'^CC=gcc', 'CC={0}'.format(spack_cc), 'Makefile-libbz2_so'
          )
  
          # The Makefiles use GCC flags that are incompatible with PGI
          if self.compiler.name == 'pgi':
              filter_file('-Wall -Winline', '-Minform=inform', 'Makefile')
              filter_file('-Wall -Winline', '-Minform=inform', 'Makefile-libbz2_so')  # noqa
  
          # Patch the link line to use RPATHs on macOS
          if 'darwin' in self.spec.architecture:
              v = self.spec.version
              v1, v2, v3 = (v.up_to(i) for i in (1, 2, 3))
  
              kwargs = {'ignore_absent': False, 'backup': False, 'string': True}
  
              mf = FileFilter('Makefile-libbz2_so')
              mf.filter('$(CC) -shared -Wl,-soname -Wl,libbz2.so.{0} -o libbz2.so.{1} $(OBJS)'  # noqa
                        .format(v2, v3),
                        '$(CC) -dynamiclib -Wl,-install_name -Wl,@rpath/libbz2.{0}.dylib -current_version {1} -compatibility_version {2} -o libbz2.{3}.dylib $(OBJS)'  # noqa
                        .format(v1, v2, v3, v3),
                        **kwargs)
  
              mf.filter(
                  '$(CC) $(CFLAGS) -o bzip2-shared bzip2.c libbz2.so.{0}'.format(v3),  # noqa
                  '$(CC) $(CFLAGS) -o bzip2-shared bzip2.c libbz2.{0}.dylib'
                  .format(v3), **kwargs)
              mf.filter(
                  'rm -f libbz2.so.{0}'.format(v2),
                  'rm -f libbz2.{0}.dylib'.format(v2), **kwargs)
              mf.filter(
                  'ln -s libbz2.so.{0} libbz2.so.{1}'.format(v3, v2),
                  'ln -s libbz2.{0}.dylib libbz2.{1}.dylib'.format(v3, v2),
                  **kwargs)
  
      def install(self, spec, prefix):
          # Build the dynamic library first
          if '+shared' in spec:
              make('-f', 'Makefile-libbz2_so')
  
          # Build the static library and everything else
          make()
          make('install', 'PREFIX={0}'.format(prefix))
  
          if '+shared' in spec:
              install('bzip2-shared', join_path(prefix.bin, 'bzip2'))
  
              v1, v2, v3 = (self.spec.version.up_to(i) for i in (1, 2, 3))
              if 'darwin' in self.spec.architecture:
                  lib = 'libbz2.dylib'
                  lib1, lib2, lib3 = ('libbz2.{0}.dylib'.format(v)
                                      for v in (v1, v2, v3))
              else:
                  lib = 'libbz2.so'
                  lib1, lib2, lib3 = ('libbz2.so.{0}'.format(v)
                                      for v in (v1, v2, v3))
  
              install(lib3, join_path(prefix.lib, lib3))
              with working_dir(prefix.lib):
                  for l in (lib, lib1, lib2):
                      symlink(lib3, l)
  
          with working_dir(prefix.bin):
              force_remove('bunzip2', 'bzcat')
              symlink('bzip2', 'bunzip2')
              symlink('bzip2', 'bzcat')
  