Support linked packages in extensions via esbuild

[kumar303]

I ran into this bug when trying to use yarn link in my extension (example). Using linked packages is important for Checkout development (internally at Shopify) so we can preview some upcoming checkout-web packages.

I think an upgrade of esbuild will fix it? I haven't tried it yet, just wanted to file an issue.

[vividviolet]

Thanks for flagging this. We did encounter this but didn't realize it's an esbuild issue as I believe we also ran into this in Web using webpack

[kumar303]

After filing this, I realized linking shopify-cli-extensions was working fine so ... that's odd 🤔

In extension code, this was working for me:

pushd ~/src/github.com/Shopify/shopify-cli-extensions/packages/shopify-cli-extensions
yarn link
popd
yarn link @shopify/shopify-cli-extensions

...but this was not:

pushd ~/src/github.com/Shopify/checkout-web/packages/checkout-ui-extensions-react
yarn link
popd
yarn link @shopify/checkout-ui-extensions-react

In any case, @jamesvidler tried upgrading esbuild and got past this specific error ✨