Can't run Spectacle in a monorepo managed by Yarn workspaces

[thekevinbrown]

We're trying to use spectacle in a monorepo structured like this:

project:
  packages:
    api-1
    api-1-docs
    api-2
    api-2-docs

We're using Yarn workspaces, and because api-1-docs and api-2-docs share the Spectacle dependencies, they get hoisted up to the node_modules folder in project instead of landing in individual node_modules folders inside of api-1-docs and api-2-docs.

This is all fine until I try to run spectacle swagger.json. Then I get:

$ spectacle swagger.json

>> Local Npm module "grunt-contrib-concat" not found. Is it installed?
>> Local Npm module "grunt-contrib-uglify" not found. Is it installed?
>> Local Npm module "grunt-contrib-cssmin" not found. Is it installed?
>> Local Npm module "grunt-contrib-watch" not found. Is it installed?
>> Local Npm module "grunt-contrib-clean" not found. Is it installed?
>> Local Npm module "grunt-contrib-copy" not found. Is it installed?
>> Local Npm module "grunt-contrib-connect" not found. Is it installed?
>> Local Npm module "grunt-compile-handlebars" not found. Is it installed?
>> Local Npm module "grunt-prettify" not found. Is it installed?
>> Local Npm module "grunt-sass" not found. Is it installed?
>> Local Npm module "grunt-embed" not found. Is it installed?
Task error: [Error: Task "sass:foundation_scss" not found.
<stack trace>

It looks like this is because grunt's loadNpmTasks doesn't resolve modules as Node would. When I check in the parent node_modules folder all of those modules are there.

My workaround for the moment is:

pushd ../.. && spectacle packages/api-1-docs/swagger.json -t packages/api-1-docs/public && popd

But that's really messy. Is there any way to get Spectacle to resolve the grunt tasks the same way Node would so I can change the command back to spectacle swagger.json?