Share cache across multiple projects in monorepo setup.

[mortyccp]

🚀 Feature Proposal

Share cache across multiple projects in monorepo setup.

Motivation

Multiple projects in monorepo setup seem to have separate ts-jest cache now. With shared cache across multiple projects, we can have performance increase.

Example

Running jest in the monorepo env will share cache.

[ahnpnl]

See jestjs/jest#10835, we use jest cache dir as base for cache dir so we can’t do anything in this case.

[ahnpnl]

This can also be done if Jest allows transformers to share cache with each other. ts-jest is only a transformer and everything is decided by internal Jest runtime.

Perhaps this can be brought to Jest team to discuss and propose a feature request.