easy_install.py 文件源码

def install_egg(self, egg_path, tmpdir):
        destination = os.path.join(self.install_dir,os.path.basename(egg_path))
        destination = os.path.abspath(destination)
        if not self.dry_run:
            ensure_directory(destination)

        dist = self.egg_distribution(egg_path)
        if not samefile(egg_path, destination):
            if os.path.isdir(destination) and not os.path.islink(destination):
                dir_util.remove_tree(destination, dry_run=self.dry_run)
            elif os.path.exists(destination):
                self.execute(os.unlink,(destination,),"Removing "+destination)
            uncache_zipdir(destination)
            if os.path.isdir(egg_path):
                if egg_path.startswith(tmpdir):
                    f,m = shutil.move, "Moving"
                else:
                    f,m = shutil.copytree, "Copying"
            elif self.should_unzip(dist):
                self.mkpath(destination)
                f,m = self.unpack_and_compile, "Extracting"
            elif egg_path.startswith(tmpdir):
                f,m = shutil.move, "Moving"
            else:
                f,m = shutil.copy2, "Copying"

            self.execute(f, (egg_path, destination),
                (m+" %s to %s") %
                (os.path.basename(egg_path),os.path.dirname(destination)))

        self.add_output(destination)
        return self.egg_distribution(destination)