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Descrizione
Do you want to request a feature or report a bug? feature
Tentative about making it into 1.0 release because I think it is an important improvement over the existing experience.
What is the current behavior?
- Final deduping
As described in https://github.com/yarnpkg/yarn/issues/3775 whether Yarn will download 2 different versions of left-pad depends on the order dependencies are resolved (it's alphabetic BFS).
Instead we should have a post resolution step that would try to dedupe all versions of a single package to the minimum after the dependency tree was resolved.
I started this https://github.com/yarnpkg/yarn/pull/3563/files#diff-80a032b8112ef9aa0ea41ee304a6024aR453 but never have finished.
- Turn off deduping
At the same time we probably could have the opposite option - force Yarn to use latest dependencies everywhere and not optimize resolution at all.
- Don't dedupe lockfiles on install
Another aspect - we don't want to dedupe dependencies if they are already in the lockfile because Yarn guarantees same node_modules for the same lockfile.
Please mention your node.js, yarn and operating system version. Yarn 0.27