conda_api.py 文件源码

def environ_set_prefix(environ, prefix, varname=conda_prefix_variable()):
    prefix = os.path.normpath(prefix)
    environ[varname] = prefix
    if varname != 'CONDA_DEFAULT_ENV':
        # This case matters on both Unix and Windows
        # with conda >= 4.1.4 since requirement.env_var
        # is CONDA_PREFIX, and matters on Unix only pre-4.1.4
        # when requirement.env_var is CONDA_ENV_PATH.
        global _envs_dirs
        global _root_dir
        if _envs_dirs is None:
            i = info()
            _envs_dirs = [os.path.normpath(d) for d in i.get('envs_dirs', [])]
            _root_dir = os.path.normpath(i.get('root_prefix'))
        if prefix == _root_dir:
            name = 'root'
        else:
            for d in _envs_dirs:
                name = subdirectory_relative_to_directory(prefix, d)
                if name != prefix:
                    break
        environ['CONDA_DEFAULT_ENV'] = name