如何使用node.js确保fs.writeFile之前的所有目录都存在

在以下示例中,代码失败,因为文件夹缓存不存在.

fs.writeFile(__config.path.base + '.tmp/cache/shared.cache',new Date().getTime(),function(err) {
        if (err){
            consoleDev('Unable to write the new cache timestamp in ' + __filename + ' at ' + __line,'error');
        }else{
            consoleDev('Cache process done!');
        }

        callBACk ? callBACk() : '';
    });

解：

// Ensure the path exists with mkdirp,if it doesn't,create all missing folders.
    mkdirp(path.resolve(__config.path.base,path.dirname(__config.cache.lastCachetimestampFilE)),function(err){
        if (err){
            consoleDev('Unable to create the directories "' + __config.path.base + '" in' + __filename + ' at ' + __line + '\n' + err.message,'error');
        }else{
            fs.writeFile(__config.path.base + filename,function(err) {
                if (err){
                    consoleDev('Unable to write the new cache timestamp in ' + __filename + ' at ' + __line + '\n' + err.message,'error');
                }else{
                    consoleDev('Cache process done!');
                }

                callBACk ? callBACk() : '';
            });
        }
    });

谢谢！