Version 2 changes

CLI Output - own error codes that can be searched within our documentation
Workspace-aware CLI - helps with packages already used in other workspaces
Zero-Installs - reads the vendor files directly from the cache, if the cache becomes part of your repository then you never need to run yarn install again
New Command: yarn dlx - replacement for npx
New Command: yarn workspaces foreach - plugin extends yarn to help run commands over multiple workspaces
New Protocols - protocols page
- patch - Creates a patched copy of the original package
- portal - Creates a link to the given folder (follows dependencies)
Workspace Releases - experimental way to ship new versions in monorepositories to only changed packages
Workspace Constraints - put constraints on the packages and their dependancies
Build Dependency Tracking - rebuild dependency tree when needed
Normalized Shell - universal npm scripts that work on windows/osx/linux
New Lockfile Format - now pure yaml
TypeScript Codebase - rewritten in Typescript
Modular Architecture - plugins loaded at runtime
Normalized Configuration - .yarnrc.yml contains all configurations of yarn
Strict Package Boundaries - Packages aren’t allowed to require other packages unless they actually list them in their dependencies
Read-Only Packages - Packages are now kept within their cache archives. For safety and to prevent cache corruptions, those archives are mounted as read-only drives and cannot be modified under normal circumstances

Resources