GitBook 编译，生成pdf报错

最近在使用 GitBook 生成静态网页和pdf文件时，百度，谷歌了很久也没有类似的解决方案，最近发现是版本问题，我把我的相关经验分享给大家！

在执行 gitbook build ，gitbook serve，gitbook pdf等命令均保持。报错了错误提示内容如下：

info: 10 plugins are installed
info: 9 explicitly listed
info: loading plugin "baidu"... OK
info: loading plugin "donate"... OK
info: loading plugin "sitemap"... OK
info: loading plugin "highlight"... OK
info: loading plugin "search"... OK
info: loading plugin "lunr"... OK
info: loading plugin "sharing"... OK
info: loading plugin "fontsettings"... OK
info: loading plugin "theme-default"... OK
info: found 24 pages
info: found 2 asset files
warn: "options" property is deprecated, use config.get(key) instead
warn: "options.generator" property is deprecated, use "output.name" instead
error: error while generating page "README.md":
TypeError: this.contentPath is not a function

当然也有些网友的报错内容如下：

warn: "options" property is deprecated, use config.get(key) instead
warn: "page.progress" property is deprecated
warn: "sections" property is deprecated, use page.content instead
TypeError: Path must be a string. Received undefined

这种问题的原因是，gitbook的版本太低。大家执行 gitbook update 命令进行升级，升级到3.2.2版本即可。

也有网友反映，报一下的错：

Error: Couldn't locate plugins "baidu, donate", Run 'gitbook install' to install plugins from registry.

这是提示插件没有安装的错误。大家执行 gitbook install 命令完成安装即可。