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  • Start Date: 30 Oct 2018
  • RFC PR: yarnpkg#106
  • Yarn Issue: n/a

Remove yarn check

1. Motivation

Running yarn install should work out of the box. There's no reason for yarn check to exist from a user perspective - they should never have to run it, because installs must always be right.

Being not particularly useful, the yarn check command receives less attention and as a result it often yields wrong / confusing results. This leads users to believe that yarn install is broken when it's in fact yarn check (https://twitter.com/betaorbust/status/1055610508533878784).

2. Detailed Design

We'll remove the yarn check command in Yarn 2.0.

3. How Can We Teach This

This command will be marked as deprecated, and running it will exit with an error code and an error message explaining why it got removed.

4. Drawbacks

  • The one use of yarn check is to provide debug information when installs aren't properly made. In practice it's never used this way, even by maintainers.

5. Alternatives

  • We could fix yarn check. This would prove time consuming, of little value because of the reasons detailed above, and resources would be better spent on other worksites.