easy_install.py 文件源码

def install_exe(self, dist_filename, tmpdir):
        # See if it's valid, get data
        cfg = extract_wininst_cfg(dist_filename)
        if cfg is None:
            raise DistutilsError(
                "%s is not a valid distutils Windows .exe" % dist_filename
            )
        # Create a dummy distribution object until we build the real distro
        dist = Distribution(
            None,
            project_name=cfg.get('metadata','name'),
            version=cfg.get('metadata','version'), platform=get_platform(),
        )

        # Convert the .exe to an unpacked egg
        egg_path = dist.location = os.path.join(tmpdir, dist.egg_name()+'.egg')
        egg_tmp = egg_path + '.tmp'
        _egg_info = os.path.join(egg_tmp, 'EGG-INFO')
        pkg_inf = os.path.join(_egg_info, 'PKG-INFO')
        ensure_directory(pkg_inf)   # make sure EGG-INFO dir exists
        dist._provider = PathMetadata(egg_tmp, _egg_info)    # XXX
        self.exe_to_egg(dist_filename, egg_tmp)

        # Write EGG-INFO/PKG-INFO
        if not os.path.exists(pkg_inf):
            f = open(pkg_inf,'w')
            f.write('Metadata-Version: 1.0\n')
            for k,v in cfg.items('metadata'):
                if k != 'target_version':
                    f.write('%s: %s\n' % (k.replace('_','-').title(), v))
            f.close()
        script_dir = os.path.join(_egg_info,'scripts')
        self.delete_blockers(   # delete entry-point scripts to avoid duping
            [os.path.join(script_dir,args[0]) for args in get_script_args(dist)]
        )
        # Build .egg file from tmpdir
        bdist_egg.make_zipfile(
            egg_path, egg_tmp, verbose=self.verbose, dry_run=self.dry_run
        )
        # install the .egg
        return self.install_egg(egg_path, tmpdir)