feat: custom haste

[DiZy]

Summary

At Facebook, we want to use a completely custom implementation of the haste map. Overriding individual pieces such as hasteImplModulePath isn't enough to be achieve our goals with the custom implementation. We need many pieces of the build process overwritten: the crawlers, the format it is persisted to disk, and the module map. We also have added dependencies such as a sqlite library.

This change introduces the option to completely override the HasteMap class with a custom implementation. This involves relatively little changes to HasteMap itself, other than some new interfaces. The one added method is "getModuleMapFromJSON" inside HasteMap. This is needed because our custom implementation also overrides the ModuleMap serialization, so we need to go to/from serialized module maps in the correct format.

Test plan

An E2E test was written which overrides the HasteMap using this option. This custom implementation overrides all the pieces we need, including the ModuleMap. We can see with this that modules are able to be resolved with specific names as defined in the custom implementation. We can also see the custom module map serialization/deserialization working.

[SimenB]

left some (hopeful) q's.

(missing changelog entry 😀)

[SimenB]

can we make this async so we can use import(config.haste.hasteMapModulePath) in the future? same for create

[DiZy]

Changing to async complicates some call sites such as the setup function in testWorker.ts

[SimenB]

right, but it needs to be async in order to use ESM. so we either need to make it so now, or make it async whenever somebody wants to write these modules using ESM (such as a WASM implementation)

[codecov-commenter]

Codecov Report

Merging #11107 (41287a3) into master (b7c968a) will decrease coverage by 0.03%.
The diff coverage is 35.71%.

@@            Coverage Diff             @@
##           master   #11107      +/-   ##
==========================================
- Coverage   64.20%   64.17%   -0.04%     
==========================================
  Files         309      309              
  Lines       13524    13534      +10     
  Branches     3295     3297       +2     
==========================================
+ Hits         8683     8685       +2     
- Misses       4126     4134       +8     
  Partials      715      715              

Impacted Files	Coverage Δ
packages/jest-config/src/ValidConfig.ts	100.00% <ø> (ø)
packages/jest-haste-map/src/ModuleMap.ts	56.25% <ø> (ø)
packages/jest-haste-map/src/index.ts	79.06% <0.00%> (-1.89%)	⬇️
packages/jest-resolve/src/index.ts	45.96% <ø> (ø)
packages/jest-runner/src/testWorker.ts	0.00% <0.00%> (ø)
packages/jest-runtime/src/index.ts	53.31% <100.00%> (ø)
packages/jest-test-sequencer/src/index.ts	90.56% <100.00%> (+0.18%)	⬆️
packages/jest-transform/src/ScriptTransformer.ts	73.46% <100.00%> (+0.09%)	⬆️

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[SimenB]

left some nits, and missing changelog. Other than that this LGTM 👍

[github-actions]

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