old_contents: """Compatibility backend for setuptools
  
  This is a version of setuptools.build_meta that endeavors to maintain backwards
  compatibility with pre-PEP 517 modes of invocation. It exists as a temporary
  bridge between the old packaging mechanism and the new packaging mechanism,
  and will eventually be removed.
  """
  
  import os
  import sys
  
  from setuptools.build_meta import _BuildMetaBackend
  from setuptools.build_meta import SetupRequirementsError
  
  
  __all__ = ['get_requires_for_build_sdist',
             'get_requires_for_build_wheel',
             'prepare_metadata_for_build_wheel',
             'build_wheel',
             'build_sdist',
             'SetupRequirementsError']
  
  
  class _BuildMetaLegacyBackend(_BuildMetaBackend):
      def run_setup(self, setup_script='setup.py'):
          # In order to maintain compatibility with scripts assuming that
          # the setup.py script is in a directory on the PYTHONPATH, inject
          # '' into sys.path. (pypa/setuptools#1642)
          sys_path = list(sys.path)           # Save the original path
  
          try:
              if '' not in sys.path:
                  sys.path.insert(0, '')
  
              super(_BuildMetaLegacyBackend,
                    self).run_setup(setup_script=setup_script)
          finally:
              # While PEP 517 frontends should be calling each hook in a fresh
              # subprocess according to the standard (and thus it should not be
              # strictly necessary to restore the old sys.path), we'll restore
              # the original path so that the path manipulation does not persist
              # within the hook after run_setup is called.
              sys.path[:] = sys_path
  
  
  _BACKEND = _BuildMetaLegacyBackend()
  
  get_requires_for_build_wheel = _BACKEND.get_requires_for_build_wheel
  get_requires_for_build_sdist = _BACKEND.get_requires_for_build_sdist
  prepare_metadata_for_build_wheel = _BACKEND.prepare_metadata_for_build_wheel
  build_wheel = _BACKEND.build_wheel
  build_sdist = _BACKEND.build_sdist
  
new_contents: """Compatibility backend for setuptools
  
  This is a version of setuptools.build_meta that endeavors to maintain backwards
  compatibility with pre-PEP 517 modes of invocation. It exists as a temporary
  bridge between the old packaging mechanism and the new packaging mechanism,
  and will eventually be removed.
  """
  
  import os
  import sys
  
  from setuptools.build_meta import _BuildMetaBackend
  from setuptools.build_meta import SetupRequirementsError
  
  
  __all__ = ['get_requires_for_build_sdist',
             'get_requires_for_build_wheel',
             'prepare_metadata_for_build_wheel',
             'build_wheel',
             'build_sdist',
             'SetupRequirementsError']
  
  
  class _BuildMetaLegacyBackend(_BuildMetaBackend):
      def run_setup(self, setup_script='setup.py'):
          # In order to maintain compatibility with scripts assuming that
          # the setup.py script is in a directory on the PYTHONPATH, inject
          # '' into sys.path. (pypa/setuptools#1642)
          sys_path = list(sys.path)           # Save the original path
  
          script_dir = os.path.dirname(os.path.abspath(setup_script))
          if script_dir not in sys.path:
              sys.path.insert(0, script_dir)
  
          try:
              super(_BuildMetaLegacyBackend,
                    self).run_setup(setup_script=setup_script)
          finally:
              # While PEP 517 frontends should be calling each hook in a fresh
              # subprocess according to the standard (and thus it should not be
              # strictly necessary to restore the old sys.path), we'll restore
              # the original path so that the path manipulation does not persist
              # within the hook after run_setup is called.
              sys.path[:] = sys_path
  
  
  _BACKEND = _BuildMetaLegacyBackend()
  
  get_requires_for_build_wheel = _BACKEND.get_requires_for_build_wheel
  get_requires_for_build_sdist = _BACKEND.get_requires_for_build_sdist
  prepare_metadata_for_build_wheel = _BACKEND.prepare_metadata_for_build_wheel
  build_wheel = _BACKEND.build_wheel
  build_sdist = _BACKEND.build_sdist
  
subject: Use absolute path in build_meta_legacy