Force to Use yarn

#yarn #npm

`package.json`

{
  "name": "nonpm",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "engines": {
    "npm": "⚠️please-use-yarn⚠️",
    "yarn": ">= 1.17.3"
  },
  "keywords": [],
  "author": "koji",
  "license": "ISC",
  "dependencies": {
    "uuid": "^8.1.0"
  }
}

`.npmrc`

https://docs.npmjs.com/misc/config#engine-strict

engine-strict = true

$ npm i
npm ERR! code ENOTSUP
npm ERR! notsup Unsupported engine for nonpm@1.0.0: wanted: {"npm":"⚠️please-use-yarn⚠️","yarn":">= 1.17.3"} (current: {"node":"12.10.0","npm":"6.10.3"})
npm ERR! notsup Not compatible with your version of node/npm: nonpm@1.0.0
npm ERR! notsup Not compatible with your version of node/npm: nonpm@1.0.0
npm ERR! notsup Required: {"npm":"⚠️please-use-yarn⚠️","yarn":">= 1.17.3"}
npm ERR! notsup Actual:   {"npm":"6.10.3","node":"12.10.0"}

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/koji.kanao/.npm/_logs/2020-05-22T01_52_57_062Z-debug.log

However, still, we can install a package 🤣🤣🤣

$ npm i uuid
npm WARN nonpm@1.0.0 No description
npm WARN nonpm@1.0.0 No repository field.

+ uuid@8.1.0
updated 1 package and audited 1 package in 0.663s
found 0 vulnerabilities

Tried another command.

$ npm audit

                       === npm audit security report ===

found 0 vulnerabilities
 in 1 scanned package

Also check out 👇!

thanks @patarapolw

Top comments (2)

Pacharapol Withayasakpunt • May 22 '20

npm preinstall is broken, unlike yarn preinstall, as it is not run before npm install xxx (only before npm install), so I created a custom install command just to be sure.