fix: Handle Yarn 2+ in @turbo/codemod install commands#12477
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anthonyshew merged 1 commit intomainfrom Mar 28, 2026
Merged
fix: Handle Yarn 2+ in @turbo/codemod install commands#12477anthonyshew merged 1 commit intomainfrom
anthonyshew merged 1 commit intomainfrom
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Yarn 2+ (Berry) removed `yarn global`, so `getGlobalUpgradeCommand()` now returns undefined for Yarn 2+ and falls through to local install. Also fixes the CLI notify-update suggestion for Yarn Berry users.
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## Release v2.8.22-canary.2 Versioned docs: https://v2-8-22-canary-2.turborepo.dev ### Changes - release(turborepo): 2.8.22-canary.1 (#12473) (`f929b6d`) - fix: Handle Yarn 2+ in @turbo/codemod install commands (#12477) (`64e5ffd`) Co-authored-by: Turbobot <turbobot@vercel.com>
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## Release v2.9.0 Versioned docs: https://v2-9-0.turborepo.dev ### Changes - release(turborepo): 2.8.21 (#12472) (`be8dc50`) - fix: Avoid panic for unanchorable/non-UTF8 git paths (#11106) (`5f45fdb`) - release(turborepo): 2.8.22-canary.1 (#12473) (`f929b6d`) - fix: Handle Yarn 2+ in @turbo/codemod install commands (#12477) (`64e5ffd`) - release(turborepo): 2.8.22-canary.2 (#12479) (`be8cf64`) - feat: Accept `experimentalCI` key in turbo.json task config (#12480) (`bff5591`) - release(turborepo): 2.8.22-canary.3 (#12481) (`cd2d25b`) - fix: Prevent pnpm overrides from corrupting resolved peer-dep variants (#12482) (`91d31cf`) - release(turborepo): 2.8.22-canary.4 (#12483) (`a6eabc6`) - fix: Skip writing unchanged files during slow-path cache restore (#12484) (`b7c0001`) - release(turborepo): 2.8.22-canary.5 (#12486) (`3155a35`) - fix: Replace pre-existing symlinks with directories during cache restore (#12488) (`d07bee8`) - release(turborepo): 2.8.22-canary.6 (#12490) (`5e9ba83`) - fix: Follow symlinks during workspace package discovery (#12489) (`f39b370`) - release(turborepo): 2.8.22-canary.7 (#12491) (`c03cc5f`) - fix: Reduce inotify watch count via gitignore-aware directory walking on Linux (#12398) (`664fd88`) - release(turborepo): 2.8.22-canary.8 (#12492) (`841fe79`) --------- Co-authored-by: Turbobot <turbobot@vercel.com>
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Summary
Closes #8567
getGlobalUpgradeCommand()now returnsundefinedfor Yarn 2+ (Berry removedyarn global), causing the orchestrator to fall through to the correct local install pathyarn dlx @turbo/codemodfor Berry users instead of the invalidyarn global addWhy
Yarn 2+ removed
yarn globalentirely. The codemod was generating invalid install commands for any Yarn Berry project, breaking the final migration step. The local install path already handled Berry correctly via angte("2.0.0")semver check, so the fix lets Berry users naturally reach that path when global install isn't possible.Testing
get-turbo-upgrade-command.test.tscovers all combinations of Yarn 1.x, 2.x, 3.x, and 4.x for both local and global install scenarios. The Yarn 2+/3+ global test cases now verify the fallthrough-to-local behavior instead of asserting the brokenyarn global addoutput.