[Bug] Can't install GitHub registry packages

[jeremytenjo]

Describe the bug

Running yarn produces a Response code 404 (Not Found) error

To Reproduce

$ git clone https://github.com/tenjojeremy/Visual-Regression-Tester.git
$ cd Visual-Regression-Tester
$ yarn install

Screenshots

Environment if relevant (please complete the following information):

• Windows 10
• Node version 12.13.1
• Yarn version 2.0.0-rc.27

[arcanis]

Configuration changed - .npmrc isn't read anymore, only .yarnrc.yml is. Check npmRegistryServer and related.

[jeremytenjo]

Thanks for the quick reply.

I added .yarnrc.yml

npmRegistries:
  tenjojeremy:
    npmAlwaysAuth: true
npmScopes:
  tenjojeremy:
    npmRegistryServer: "https://npm.pkg.github.com/"

When I run yarn I get a Response code 401 (Unauthorized) error

Repo: https://github.com/tenjojeremy/Visual-Regression-Tester

[arcanis]

You need to authenticate to the GH registry, it doesn't support public unauthenticated access

[jeremytenjo]

I still get the error when authenticated

[arcanis]

Well - npm login will generate the npm configuration files, not the Yarn configuration files.

Try yarn npm login --scope tenjojeremy

[jeremytenjo]

Same error

[arcanis]

Found the problem - in your project Yarnrc you said you have the following:

npmRegistries:
  tenjojeremy:
    npmAlwaysAuth: true

Remove it, and in $HOME/.yarnrc.yml add the following:

npmRegistries:
  "https://npm.pkg.github.com":
    npmAlwaysAuth: true

The key was incorrect in npmRegistries, and because you had it in two files the local one (without the auth token) was overwriting the global one (with the token). As a result, your requests were unauthenticated. I'll open another issue to track configuration merging.

[arcanis]

Closing in favour of #779