Is the yarn version installed configurable?

[johnnyreilly]

Heya!

Thanks for your wonderful action 🤗

I'm using it to power the GitHub Action that runs tests on ts-loader. We recently bumped on an issue with yarn: yarnpkg/yarn#7584

That was fixed in yarn v1.19.1 and I was left pondering how to upgrade the version of yarn that this action seems to install. See my ponderings here:

TypeStrong/ts-loader#1026 (comment)

I was able to resolve the issue by introducing this:

      - name: upgrade yarn
        run: npm install yarn -g

which upgrades to the latest and greatest yarn. You see... success!:

https://github.com/TypeStrong/ts-loader/pull/1027/checks?check_run_id=270427331

My question is, how is yarn installed by this action? And assuming I'm correct that it is, is it configurable to ensure that it's the latest and greatest? I'm wondering whether the course of action I've followed is the "best way". Or if there's another?

Thanks again for your wonderful action!

[chingc]

I had a problem that was also fixed in v1.19.1. You can use the policies sub-command to set the yarn version. The snippet below is what I use to grab the latest version.

- name: Install
  run: |
    yarn policies set-version
    yarn install --frozen-lockfile

[vprasanth]

I had a problem that was also fixed in v1.19.1. You can use the policies sub-command to set the yarn version. The snippet below is what I use to grab the latest version.

- name: Install
  run: |
    yarn policies set-version
    yarn install --frozen-lockfile

This is good, but I think you should run this command locally and commit the .yarn and .yarnrc files into the repo. Now, no matter what version of yarn is used in the CI it should switch to using the packaged version. The same goes for team members.

[dmitry-shibanov]

Hello everyone. Thank you for all your responses.

Actually the action does not install yarn. Yarn is preinstalled on the hosted images. You can change it version as you described or please refer to the documentation.

For now I'm closing the issue. If you have any concerns feel free to ping us.