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Warn that postinstall-postinstall runs the hook twice #365

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Warn that postinstall-postinstall runs the hook twice #365

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5 changes: 5 additions & 0 deletions README.md
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Expand Up @@ -281,6 +281,11 @@ Yarn only runs the `postinstall` hook after `yarn` and `yarn add`, but not after
`yarn remove`. The `postinstall-postinstall` package is used to make sure your
`postinstall` hook gets executed even after a `yarn remove`.

Note that `postinstall-postinstall` will run your `postinstall` hook twice if you
are doing a `yarn install`, etc. So if you add your own script to the `postinstall`
hook, it must be idempotent, and you should be aware that the first time it is run,
you will not see console output.

## License

MIT
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