Installing a private package from Gitlab with Yarn - gitlab

Question

I have a private npm package that is published to the Gitlab Package Registry using a Gitlab CI pipeline.
I want to install this package in a project using yarn.
Following the documentation helped me come up with the following .npmrc file :
//gitlab.com/api/v4/packages/npm/:_authToken=glpat-***********
#my-org:registry=https://gitlab.com/api/v4/packages/npm/
With the above, npm install #my-org/my-package works perfectly.
However, yarn add #my-org/my-package fails. using --verbose shows a 404 :
verbose 1.169823875 Error: https://gitlab.com/api/v4/projects/<my-project-id>/packages/npm/#my-org/my-package/-/#my-org/my-package-1.0.3.tgz: Request failed "404 Not Found"
error An unexpected error occurred: "https://gitlab.com/api/v4/projects/<my-project-id>/packages/npm/#my-org/my-package/-/#my-org/my-package-1.0.3.tgz: Request failed \"404 Not Found\""
The package does exist at version 1.0.3, NPM installs it.
I need to get this to work with Yarn. How can I do this ?
Additionaly, is there a way to take the authToken out of the .npmrc file ?

Answer 1

I also was not able to install it with yarn, but npm was ok.
This this worked out:
npm config set -- //gitlab.com/api/v4/packages/npm/:_authToken=XXX
npm config set -- //gitlab.com/api/v4/projects/<projectID>/packages/npm/:_authToken=XXX
npm config set #my-scope:registry https://gitlab.com/api/v4/packages/npm/
yarn config set '//gitlab.com/api/v4/projects/:_authToken' "XXX"
yarn config set '//gitlab.com/api/v4/packages/npm/:_authToken' "XXX"
And no need for .npmrc for this setup.
Here is the official GitLab docs on that issue.

Answer 2

Your config in .npmrc should work if you are using Yarn v1.x, as Yarn 1 uses the registries configured in this file.
However, for Yarn 2, you must configure your private registries in the .yarnc.yml at the project level:
npmScopes:
my-org:
npmRegistryServer: "https://gitlab.com/api/v4/projects/my-project-id/packages/npm/"
npmAlwaysAuth: true
npmAuthToken: glpat-*******
Replace my-org with the scope of your package, my-project-id with the numeric id of your Gitlab project, and put your token with scope "api".