[Bug] Does not install anything.

[trusktr]

• I'd be willing to implement a fix

Describe the bug

I tried running

yarn set version berry
yarn add "code-vue@trusktr/live-code#6085bf5ca1a7faa5ea021a0fc61f6ba08e08030d"
yarn install

in my project which contains an empty package.json ({}), and nothing is installed. There's no node_modules folder after

To Reproduce

Full reproduction:

cd ~
mkdir yarn-test
cd yarn-test
npx yarn set version berry
npx yarn add "code-vue@trusktr/live-code#6085bf5ca1a7faa5ea021a0fc61f6ba08e08030d"
npx yarn install
ls -ld node_modules

and you'll see the final message ls: cannot access 'node_modules': No such file or directory.

Environment if relevant (please complete the following information):

• OS: [e.g. OSX, Linux, Windows, ...]
• Node version 13.8.0
• Yarn version 2.2.0-rc.29

[nicolo-ribaudo]

This is expected: Yarn 2 doesn't generate node_modules (https://yarnpkg.com/features/pnp).

If you want the old behavior, you must create a .yarnrc.yml file containing the nodeLinker: node-modules option.

[trusktr]

Hmm, interesting. Why is this? Don't most (all) people expect to see a node_modules folder? EDIT: I just read about PnP. I like the concept.

It reminds me of ied package manager, and npm alternative, that essentially has perfect hoisting using symlinks from node_modules and doesn't need to patch Node at runtime. A project with ied can still accidentally import a dependency from up high though.

[trusktr]

How do I get it to work?

I have an index.js file that imports that one dependency. Then, I have a start script in package.json, and I run yarn start then it has an error:

Error: Couldn't find a suitable Node resolution for the specified unqualified path

Source path: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue/dist/code-vue.umd.js
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue/dist/code-vue.umd.js.js
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue/dist/code-vue.umd.js.json
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue/dist/code-vue.umd.js.node
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue.js
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue.json
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue.node
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue/index.js
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue/index.json
Rejected resolution: /home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue/index.node

Require stack:
- /home/trusktr/tmp/index.js
    at Object.makeError (/home/trusktr/tmp/.pnp.js:5515:24)
    at resolveUnqualified (/home/trusktr/tmp/.pnp.js:14471:29)
    at resolveRequest (/home/trusktr/tmp/.pnp.js:14496:14)
    at Object.resolveRequest (/home/trusktr/tmp/.pnp.js:14558:26)
    at Function.module_1.Module._resolveFilename (/home/trusktr/tmp/.pnp.js:13787:34)
    at Function.module_1.Module._load (/home/trusktr/tmp/.pnp.js:13672:40)
    at Module.require (internal/modules/cjs/loader.js:1040:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/home/trusktr/tmp/index.js:1:17)
    at Module._compile (internal/modules/cjs/loader.js:1151:30) {
  code: 'MODULE_NOT_FOUND',
  pnpCode: 'QUALIFIED_PATH_RESOLUTION_FAILED',
  data: {
    unqualifiedPath: '/home/trusktr/tmp/.yarn/cache/code-vue-exotic-8b828e1aaa-2.zip/node_modules/code-vue',
    request: 'code-vue',
    issuer: '/home/trusktr/tmp/'
  },
  requireStack: [ '/home/trusktr/tmp/index.js' ]
}

For now I set that option, nodeLinker: node-modules, and that works.

[sdwlig]

Instead, use yarn node index.js