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Last active March 13, 2025 21:30
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How to upgrade Yarn to Yarn Modern (v4 at the moment) seamlessly
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.gitignore
.pnp.*
.yarn/*
!.yarn/patches
!.yarn/plugins
!.yarn/releases
!.yarn/sdks
!.yarn/versions
Raw
upgrade-yarn-to-berry.sh
#!/bin/sh
# Upgrade to latest Yarn Modern (v4 at the moment)
# WARNING: If you're running Node.js < 18:
# 1. Who hurt you?
# 2. Use `yarn set version 3.6.4` instead.
yarn set version berry
# (optional) Set nodeLinker to node-modules - this 100% guarantees backwards compatibility
# NOTE: Not needed in latest Yarn versions, this should be automatic
yarn config set nodeLinker node-modules
# (optional) Adds `yarn upgrade-interactive` command back
# NOTE: Not needed in Yarn v4, plugins are now included
yarn plugin import interactive-tools
# Reinstalls project using Yarn Modern. This will also update your yarn.lock file, but will
# NOT sneakily upgrade the dependencies
yarn
# Commits the changes
git add . && git commit -m "Upgrade Yarn to Yarn Berry"
@wojtekmaj
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@dominicgan Importing this plugin is no longer necessary in v4. They are now all built in.

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