当 npm script 过多或者变得复杂时，会导致 package.json 混乱，可读性差等问题。

这里我们借助 scripty 将 npm script 剥离到单独的文件中，从而把复杂性隔到单独的模块里面，让代码整体看起来更加清晰。如下为一个复杂npm script：

"scripts": {
    "eslint": "# 校验js\n  eslint *.js",
    "preeslint": "echo 'preeslint'",
    "lint:css": "# 校验css \t stylelint *.css",
    "lint:json": "jsonlint *.json",
    "lint:markdown": "markdownlint *.md",
    "test": "cross-env NODE_ENV=test mocha test/",
    "all": "npm-run-all lint:css lint:json lint:markdown",
    "all2": "npm-run-all lint:*",
    "//": "test",
    "lint:js:fix": "npm run eslint --fix",
    "pretest": "npm run all2",
    "precover": "npm run cover:cleanup",
    "cover": "nyc --reporter=html npm test",
    "cover:cleanup": "rimraf coverage && rimraf .nyc_output",
    "cover:archive": "cross-var make-dir \"coverage_arhive/$npm_package_version && cpr coverage/* coverage_arhive/$npm_package_version\"",
    "postcover": "npm-run-all cover:archive  --parallel cover:serve cover:open",
    "dummy": "cross-var echo $npm_package_version",
    "cover:serve": "cross-var http-server coverage_arhive/$npm_package_verdsion -p $npm_package_config_port",
    "cover:open": "cross-var opn http://localhost:$npm_package_config_port"
  },

我们就以上进行修改

安装 scripty

$ npm install scripty --save-dev

创建目录和文件

这里创建的目录和文件要与命令一一对应。如：

$ mkdir scripts/cover.sh
$ mkdir scripts/cover/serve.sh
$ mkdir scripts/cover/open.sh

注意 脚本需增加可执行权限是必须的，否则 scripty 执行时会报错

$ chmod -R a+x scripts/**/*.sh

修改 .sh文件

// scripts/cover.sh

#! /usr/bin/env bash

# remove old coverage reports
rimraf coverage && rimraf .nyc_output

# run test and collect new coverage
nyc --reporter=html npm test

make-dir -p coverage_arhive/$npm_package_version

cp coverage/* coverage_arhive/$npm_package_version

npm-run-all --parallel cover:serve cover:open

// scripts/cover/serve.sh

#!/usr/bin/env bash

http-server coverage_arhive/$npm_package_verdsion -p $npm_package_config_port

// scripts/cover/open.sh

#!/usr/bin/env bash

sleep 1

opn http://localhost:$npm_package_config_port

*** shell 脚本里面是可以随意使用 npm 的内置变量和自定义变量的***

修改 package.json

"scripts": {
    "eslint": "# 校验js\n  eslint *.js",
    "preeslint": "echo 'preeslint'",
    "lint:css": "# 校验css \t stylelint *.css",
    "lint:json": "jsonlint *.json",
    "lint:markdown": "markdownlint *.md",
    "test": "cross-env NODE_ENV=test mocha test/",
    "all": "npm-run-all lint:css lint:json lint:markdown",
    "all2": "npm-run-all lint:*",
    "//": "test",
    "lint:js:fix": "npm run eslint --fix",
    "pretest": "npm run all2",
    "dummy": "cross-var echo $npm_package_version",
    "cover": "scripty",
    "cover:serve": "scripty",
    "cover:open": "scripty"
 }

测试过程

$ npm run cover

$ init-npm@0.1.1 cover /vipkid/learn/npm/init-npm
$ scripty

$ Executing "/vipkid/learn/npm/init-npm/scripts/cover.sh":

$ #! /usr/bin/env bash
$
$ 
$ ...
$ Starting up http-server, serving coverage_arhive/
Available on:
  http://127.0.0.1:3000
  http://192.168.48.65:3000
Hit CTRL-C to stop the server

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