lerna import && add 使用&&常见问题解决

使用lerna 的import 我们可以方便的将一个普通的npm 包倒入到lerna 管理的monorepo 中

环境准备

• lerna init
  注意必须是一个git 项目，同时需要commit ，不然会报错

lerna init

• 创建一个npm package
  不再lerna 初始化的目录, 注意必须是一个git 项目，同时需要commit

 

yarn init -y

index.js:

module.exports = {

  username:"dalong",

  age:333

}

• 目录结构如下

├── platform

│ ├── lerna.json

│ ├── package.json

│ └── packages

└── userlogin

    ├── index.js

    └── package.json

使用import

• import
  如何userlogin 不是git 项目，会有如下的错误提示，注意需要git init 并提交

 

 cli v3.8.0

lerna ERR! Error: Command failed: git log --format=%h

lerna ERR! fatal: Not a git repository (or any of the parent directories): .git

lerna ERR! 

lerna ERR! 

lerna ERR! at makeError (/usr/local/lib/node_modules/lerna/node_modules/execa/index.js:174:9)

lerna ERR! at Function.module.exports.sync (/usr/local/lib/node_modules/lerna/node_modules/execa/index.js:338:15)

lerna ERR! at Object.execSync (/usr/local/lib/node_modules/lerna/node_modules/@lerna/child-process/index.js:22:16)

lerna ERR! at ImportCommand.externalExecSync (/usr/local/lib/node_modules/lerna/node_modules/@lerna/import/index.js:137:34)

lerna ERR! at ImportCommand.initialize (/usr/local/lib/node_modules/lerna/node_modules/@lerna/import/index.js:82:25)

lerna ERR! at Promise.resolve.then (/usr/local/lib/node_modules/lerna/node_modules/@lerna/command/index.js:266:24)

lerna ERR! at <anonymous>

lerna ERR! lerna Command failed: git log --format=%h

lerna ERR! lerna fatal: Not a git repository (or any of the parent directories): .git

lerna ERR! lerna 

 

如何lerna 项目没有commit 会有如下提示,lerna 项目也必须完整的commit

Error: Command failed: git rev-parse HEAD

lerna ERR! fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree.

lerna ERR! Use '--' to separate paths from revisions, like this:

lerna ERR! 'git <command> [<revision>...] -- [<file>...]'

lerna ERR! 

lerna ERR! HEAD

lerna ERR! 

lerna ERR! at makeError (/usr/local/lib/node_modules/lerna/node_modules/execa/index.js:174:9)

lerna ERR! at Function.module.exports.sync (/usr/local/lib/node_modules/lerna/node_modules/execa/index.js:338:15)

lerna ERR! at Object.execSync (/usr/local/lib/node_modules/lerna/node_modules/@lerna/child-process/index.js:22:16)

lerna ERR! at ImportCommand.getCurrentSHA (/usr/local/lib/node_modules/lerna/node_modules/@lerna/import/index.js:129:34)

lerna ERR! at ImportCommand.initialize (/usr/local/lib/node_modules/lerna/node_modules/@lerna/import/index.js:98:31)

lerna ERR! at Promise.resolve.then (/usr/local/lib/node_modules/lerna/node_modules/@lerna/command/index.js:266:24)

lerna ERR! at <anonymous>

lerna ERR! lerna Command failed: git rev-parse HEAD

lerna ERR! lerna fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree.

lerna ERR! lerna Use '--' to separate paths from revisions, like this:

lerna ERR! lerna 'git <command> [<revision>...] -- [<file>...]'

lerna ERR! lerna 

lerna ERR! lerna HEAD

 

import 提示信息，同意即可

lerna import ../userlogin         

lerna notice cli v3.8.0

lerna info About to import 1 commits from ../userlogin into packages/userlogin

? Are you sure you want to import these commits onto the current branch? (ynH) 

信息如下：

lerna notice cli v3.8.0

lerna info About to import 1 commits from ../userlogin into packages/userlogin

? Are you sure you want to import these commits onto the current branch? Yes

lerna info 8a94131 

lerna success import finished

 

 

• 效果

├── lerna.json

├── package.json

└── packages

    └── userlogin

        ├── index.js

        └── package.json

  

• 使用倒入的package
  在platform 目录,按照提示操作即可

 

lerna create loginui 

cd loginui 

lerna add userlogin

• 编写调用代码

loginui/lib/loginui.js

'use strict';

const userlogin = require("userlogin");

module.exports = loginui;

function loginui() {  

    return userlogin;

}

简单测试代码

loginui/__tests__/loginui.test.js

```code

'use strict';

const loginui = require('..');

console.log(loginui())

 

添加npm script
packages/loginui/package.json

 

+"scripts": {

+ "test": "node __tests__/loginui.test"

+}

• 在lerna 根项目编写npm script 调用测试
  platform/package.json

 

+ "scripts": {

+ "test":"lerna run test"

+ }

• 调用效果
  yarn test

 

yarn test

yarn run v1.10.1

$ lerna run test

lerna notice cli v3.8.0

lerna info Executing command in 1 package: "npm run test"

lerna info run Ran npm script 'test' in 'loginui' in 0.5s:

​

> loginui@0.0.0 test /Users/dalong/mylearning/lerna-project/dalongdemo/platform/packages/loginui

> node __tests__/loginui.test

​

{ username: 'dalong', age: 333 }

lerna success run Ran npm script 'test' in 1 package in 0.5s:

lerna success - loginui

✨ Done in 1.33s.

 

说明

lerna 对于我们确认大型项目配置的一致性有很大的帮助

参考资料

https://lernajs.io/#command-import