Yarn 2 does not run prepare/prepublishOnly script

[polRk]

package.json

  "scripts": {
    "build": "tsc --build",
    "lint": "eslint src/**/*.ts --fix",
    "format": "prettier src/**/*.ts --write",
    "generate": "docker run --rm -v $PWD/codegen.yml:/codegen/codegen.yml -v $PWD/src:/codegen/src polrk/graphql-codegen",
    "prepublishOnly": "yarn generate && yarn format && yarn lint && yarn build"
  }

Command

yarn npm publish

What is the expected behavior?
Run prepublishOnly script before

➜ git:(master) ✗ npm publish

@0.0.0 prepublishOnly .
yarn generate && yarn format && yarn lint && yarn build

What is the current behavior?
➜ git:(master) ✗ yarn npm publish
➤ YN0000: codegen.yml
➤ YN0000: lib/index.d.ts
➤ YN0000: lib/index.js
➤ YN0000: lib/index.js.map
➤ YN0000: lib/sdk.d.ts
➤ YN0000: lib/sdk.js
➤ YN0000: lib/sdk.js.map
➤ YN0000: package.json
➤ YN0000: tsconfig.json

Steps to Reproduce

1. npm publish
2. yarn npm publish

Environment

• Node Version: 12
• Yarn V2
• OS and version: Mac OS

[paul-soporan]

That's intended, Yarn 2+ doesn't support prepare / prepublishOnly anymore. Use prepack for transpiling the sources and prepublish when you don't want side-effects.

You can find a list of supported lifecycle scripts here: https://yarnpkg.com/advanced/lifecycle-scripts.