yarn info

显示一个包的信息。

yarn info <package> [<field>]

这个命令会拉取包的信息并返回为树格式,包不必安装到本地。

yarn info react
yarn info vx.x.x
{ name: 'react',
  version: '15.4.0-rc.2',
  description: 'React is a JavaScript library for building user interfaces.',
  time: { modified: '2016-10-06T22:09:27.397Z', ... } ... }

这个命令默认的报告样式时单引号序列化的。 要输出有效的 JSON 行格式,使用标准的 --json 标志:

yarn info react --json
{"type":"inspect","data":{"name":"react","time":{...}}}
{"type":"finished","data":417}

指定版本的信息

追加 @[version] 到包名参数来提供那个特定版本的信息:

yarn info react@15.3.0
yarn info vx.x.x
{ name: 'react',
  version: '15.3.0',
  description: 'React is a JavaScript library for building user interfaces.',
  time: { modified: '2016-10-06T22:09:27.397Z', ... } ... }

选择特定字段

如果提供了可选字段参数,那么只有树的那部分被返回。

yarn info react description
yarn info vx.x.x
React is a JavaScript library for building user interfaces.

或检查可用的版本:

yarn info react versions
yarn info v1.1.0
[ '0.0.1',
  '0.0.2',
  '0.0.3',
(etc)

如果指定的字段在一个内嵌的对象里,则返回子树:

yarn info react time
yarn info vx.x.x
{ modified: '2016-10-06T22:09:27.397Z',
  created: '2011-10-26T17:46:21.942Z', ... }

yarn info react time --json
{"type":"inspect","data":{"modified":"2016-10-06T22:09:27.397Z","created":...}}
...

获取 readme 字段

请注意,默认情况下,yarn info 不返回 readme 字段(因为它通常很长)。要显式请求那个字段,使用第二个参数:

yarn info react readme
yarn info vx.x.x
## react

An npm package to get you immediate access to
[React](https://facebook.github.io/react/).
...