req_install.py 文件源码

def get_install_args(self, global_options, record_filename, root, prefix):
        install_args = [sys.executable, "-u"]
        install_args.append('-c')
        install_args.append(SETUPTOOLS_SHIM % self.setup_py)
        install_args += list(global_options) + \
            ['install', '--record', record_filename]

        if not self.as_egg:
            install_args += ['--single-version-externally-managed']

        if root is not None:
            install_args += ['--root', root]
        if prefix is not None:
            install_args += ['--prefix', prefix]

        if self.pycompile:
            install_args += ["--compile"]
        else:
            install_args += ["--no-compile"]

        if running_under_virtualenv():
            py_ver_str = 'python' + sysconfig.get_python_version()
            install_args += ['--install-headers',
                             os.path.join(sys.prefix, 'include', 'site',
                                          py_ver_str, self.name)]

        return install_args