Yarn missing module files generated from 'prepare' hook

[kicktheken]

Bug: yarn missing module files generated from 'prepare' hook

Setup

Yarn v1.21.1
macOS 10.15.2
node v12.13.1

Steps to Reproduce

yarn add https://github.com/kicktheken/PIXI.TextInput

Expected behavior

> find node_modules/pixi-text-input/dist
node_modules/pixi-text-input/dist
node_modules/pixi-text-input/dist/app
node_modules/pixi-text-input/dist/app/TextInput.js
node_modules/pixi-text-input/dist/app/DefaultBoxGenerator.d.ts
node_modules/pixi-text-input/dist/app/DefaultBoxGenerator.js
node_modules/pixi-text-input/dist/app/TextInput.d.ts
node_modules/pixi-text-input/dist/index.js
node_modules/pixi-text-input/dist/index.d.ts

Actual behavior

> find node_modules/pixi-text-input/dist
node_modules/pixi-text-input/dist
node_modules/pixi-text-input/dist/index.js

I did npm i https://github.com/kicktheken/PIXI.TextInput (with npm v6.13.4) and the expected files exists so this looks like a bug in yarn

[rally25rs]

duplicate of #5235 which looks like it would be addressed by #6131 but it has been sitting open for quite a while.

[tpai]

Just in case someone came for the solution, it seems Yarn respect .gitignore while building artifact, that cause everything inside dist/ will be ignored except the file which specified at main field of package.json which is dist/index.js.

According to #5235 , there are three workarounds for this:

• Modify .gitignore to not ignore dist/.
• Add .npmignore, Yarn respect it over .gitignore.
• Specify dist/ at files field in package.json.