Using yalc for Local SDK Testing

Yalc is a simple local dependency repository which we can use to work with local versions of our SDKs. This is a good alternative to npm|yarn link for packages where linking is problematic (e.g. SvelteKit or Angular).

Here's how to set up and use yalc:

Installing yalc

Either install yalc globally,

npm install -g yalc

yarn global add yalc

or add it to your desired test projects (same command without the -g|global flags)

Registering/Updating packages

Whenever you want to make your local changes available to your test projects (e.g. after a local code change), run:

yarn yalc:publish

If you run this command in the root of the repo, this will publish all SDK packages to the local yalc repo. If you run it in a specific SDK package, it will just publish this package. You don't need to call yalc update in your test project. Already linked test projects will be update automatically.

Using yalc packages

In your test project, run

yalc add @sentry/browser #or any other SDK package

to add the local SDK package to your project.

Important: You need to yalc add the dependencies of the SDK package as well (e.g. core, utils, types, etc.).

Troubleshooting:

My changes are not applied to the test project

Did you run yarn build && yarn yalc:publish after making your changes?

My test project uses Vite and I still don't see changes

Vite pre-bundles and caches dependencies for dev builds. It doesn't recognize changes in yalc packages though :( To make these changes show up anyway, run vite dev --force.