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fix: include missing generator options in updateHash for persistent cache correctness#20821

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alexander-akait merged 1 commit intomainfrom
fix/generator-updatehash-completeness
Apr 12, 2026
Merged

fix: include missing generator options in updateHash for persistent cache correctness#20821
alexander-akait merged 1 commit intomainfrom
fix/generator-updatehash-completeness

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Summary
Fixes #20801 (review)

CssGenerator was missing exportsOnly, JsonGenerator was missing JSONParse, and WebAssemblyGenerator was missing mangleImports in their updateHash methods. This could cause stale cached code generation results when these options change between builds with filesystem cache.

What kind of change does this PR introduce?
fix

Did you add tests for your changes?
Existing

Does this PR introduce a breaking change?
No

If relevant, what needs to be documented once your changes are merged or what have you already documented?
Nothing

Use of AI
Partial

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changeset-bot Bot commented Apr 11, 2026

🦋 Changeset detected

Latest commit: 95548fb

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package
Name Type
webpack Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

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github-actions Bot commented Apr 11, 2026

This PR is packaged and the instant preview is available (3f5fe0d).

Install it locally:

  • npm
npm i -D webpack@https://pkg.pr.new/webpack@3f5fe0d
  • yarn
yarn add -D webpack@https://pkg.pr.new/webpack@3f5fe0d
  • pnpm
pnpm add -D webpack@https://pkg.pr.new/webpack@3f5fe0d

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codecov Bot commented Apr 11, 2026

Codecov Report

❌ Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.40%. Comparing base (9211be0) to head (95548fb).
⚠️ Report is 2 commits behind head on main.

Files with missing lines Patch % Lines
lib/wasm-sync/WebAssemblyGenerator.js 0.00% 3 Missing ⚠️

❌ Your patch status has failed because the patch coverage (57.14%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files
@@            Coverage Diff             @@
##             main   #20821      +/-   ##
==========================================
- Coverage   91.40%   91.40%   -0.01%     
==========================================
  Files         561      561              
  Lines       55359    55366       +7     
  Branches    14610    14612       +2     
==========================================
+ Hits        50603    50607       +4     
- Misses       4756     4759       +3     
Flag Coverage Δ
integration 90.39% <57.14%> (-0.01%) ⬇️
test262 42.00% <75.00%> (+0.04%) ⬆️
unit 36.23% <0.00%> (-0.01%) ⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

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codspeed-hq Bot commented Apr 11, 2026

Merging this PR will degrade performance by 25.83%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 1 improved benchmark
❌ 1 regressed benchmark
✅ 142 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
Memory benchmark "css-modules", scenario '{"name":"mode-production","mode":"production"}' 7 MB 9.5 MB -25.83%
Memory benchmark "lodash", scenario '{"name":"mode-development","mode":"development"}' 5.3 MB 4.1 MB +28.49%

Comparing fix/generator-updatehash-completeness (95548fb) with main (9211be0)

Open in CodSpeed

@xiaoxiaojx xiaoxiaojx force-pushed the fix/generator-updatehash-completeness branch from 1392fec to 7a3c40b Compare April 11, 2026 09:58
…ache correctness

CssGenerator was missing `exportsOnly`, JsonGenerator was missing
`JSONParse`, and WebAssemblyGenerator was missing `mangleImports` in
their updateHash methods. This could cause stale cached code generation
results when these options change between builds with filesystem cache.
@xiaoxiaojx xiaoxiaojx force-pushed the fix/generator-updatehash-completeness branch from 7a3c40b to 95548fb Compare April 11, 2026 10:14
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Types Coverage

Coverage after merging fix/generator-updatehash-completeness into main will be
98.93%
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@alexander-akait alexander-akait merged commit 3f5fe0d into main Apr 12, 2026
55 of 56 checks passed
@alexander-akait alexander-akait deleted the fix/generator-updatehash-completeness branch April 12, 2026 13:44
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