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chore: do not bundle type definitions for packages which have only one .d.ts file #12718

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merged 1 commit into from
Apr 23, 2022

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mrazauskas
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Summary

What if type definitions of packages which have only one .d.ts file would not be bundled?

First, there is nothing to bundle. Second, that could be an elegant workaround for: https://github.com/facebook/jest/blob/3c6f14bc51a857bb0baf8e6ff7af43aaf47951e9/packages/jest-expect/src/types.ts#L19-L20

In this case the problem was that the bundler is simply discarding declare module 'expect' declaration. An attempt to have jest.Mocked was hitting the same problem, because declare namespace jest was also thrown away. jest.Mocked declaration must live inside @jest/globals, which is just one tiny file. That’s why I though: wait, what is the bundler doing here? ;D

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Green CI.

@mrazauskas
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Hm.. This part of the script does not run on definition files which are not bundled (should it be split into separate step, perhaps?):

https://github.com/facebook/jest/blob/3c6f14bc51a857bb0baf8e6ff7af43aaf47951e9/scripts/bundleTs.mjs#L160-L195

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thanks! we don't need that snippet you linked in this case since we no longer mess with tsc's output

@SimenB SimenB merged commit a28db24 into jestjs:main Apr 23, 2022
@mrazauskas mrazauskas deleted the chore-tweak-bundleTs branch April 23, 2022 09:45
SimenB pushed a commit that referenced this pull request Apr 24, 2022
F3n67u pushed a commit to F3n67u/jest that referenced this pull request May 2, 2022
F3n67u pushed a commit to F3n67u/jest that referenced this pull request May 2, 2022
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3 participants