Support monorepos (or running commands in linked dependencies)

[NullVoxPopuli]

This came up in this PR: embroider-build/embroider#1126 (review)

Where I'm trying to build a library that is linked to an app.

The issue is that I can't seem to run rollup in the linked addon and have those assets available to the PreparedApp.

execute, exists on the app, but is not available for linked packages.

@ef4 suggested this API:

await app.inDependendency('v2-addon').execute('yarn rollup -c ./rollup.config.mjs')

which seems reasonable 🤷

[ef4]

Small clarifying point: monorepo or not doesn't have any bearing on this. scenario-tester shouldn't be able to tell whether you're in a monorepo or not. But yes, the feature is having a convenient way to execute commands inside one of the project's dependencies, not just in the top-level project itself.

[krisselden]

@NullVoxPopuli I believe this is because the base project didn't linkBins before inside the tmp dir, so it relied on the outside projects node_modules/.bin.

This should be fixed in the next release