[Feature] Add option to yarn install to avoid hoisting deep dependencies

[HiiiiD]

• I'd be willing to implement this feature (contributing guide)
• This feature is important to have in this repository; a contrib plugin wouldn't do

Describe the user story

Today I've encountered an issue when moving from NPM to Yarn with a project. Yarn tries to hoist deep dependencies and doing so breaks some build actions that depend on these packages.
I'll show a brief example:

• svelte-material-ui@4.2.0 have @smui/textfield@4.2.0 as direct dependency
• @smui-extra/autocomplete@6.0.0-beta.16 have @smui/textfield@6.0.0-beta.16 as direct dependency too

Now, when performing yarn install, @smui/textfield on the root of node_modules is at version 6.0.0-beta.16 but I want it to be at version 4.2.0. @smui-extra/autocomplete dependencies should be completely isolated from the rest of the root dependencies in order to not interfere with them.

Describe the solution you'd like

I'd like to have an option when performing a yarn add that allows to avoid hoisting deep dependencies, in order to share multiple package versions for multiple direct dependencies.

Describe the drawbacks of your solution

There's one drawback to my solution, that is the increased bundle size of the node_modules folder due to duplication of dependencies.

Describe alternatives you've considered

I've researched alternatives for over a day but found none. Also, I think that this issue can be related to this feature request

[merceyz]

Have you had a look at https://yarnpkg.com/configuration/yarnrc#nmHoistingLimits?

[HiiiiD]

Of course but it is a "global" functionality, I'd like to have the same functionality for a single dependency.

[larixer]

If the package needs a specific hoisting layout it means there is a bug either in this package or in the packages that use it. The best course of action here is to fix the bug in the relevant packages and not to try to cure symptoms.

Also, I think that yarnpkg/yarn#5705 can be related to this feature request

This issue is not related, because Yarn 3+ (and high versions of Yarn 2+ too, I just don't remember a specific version when this was implemented) gives priority to direct workspace dependencies during hoisting, so deep dependencies cannot shadow direct workspace dependencies in the case of Yarn 3+.

@smui/textfield on the root of node_modules is at version 6.0.0-beta.16 but I want it to be at version 4.2.0

You can achieve this by adding dependency on version 4.2.0 of @smui/textfield to your root package.json, Yarn will have no choice but to use exactly this version in the root node_modules

[HiiiiD]

@larixer thanks so much for your support, I'll try to do what you said.