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chore: replace micromatch with picomatch#685

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roli-lpci wants to merge 1 commit intofacebook:mainfrom
roli-lpci:chore/replace-micromatch-with-picomatch
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chore: replace micromatch with picomatch#685
roli-lpci wants to merge 1 commit intofacebook:mainfrom
roli-lpci:chore/replace-micromatch-with-picomatch

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@roli-lpci
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Summary

Replace micromatch with picomatch for glob matching in ignoreFiles.js.

  • Only micromatch.isMatch() was used, which maps directly to picomatch.isMatch() (identical API — picomatch is the engine inside micromatch)
  • picomatch has zero dependencies and a smaller install size (83 kB vs 235 kB)
  • Part of the e18e ecosystem cleanup initiative

Closes #603

Test plan

  • All 18 test suites pass (207 tests, 8 snapshots)
  • Verified picomatch.isMatch() accepts the same signature: (string, patterns, options) including array patterns
  • { dot: true } option is supported by picomatch

Replace micromatch with picomatch for glob matching in ignoreFiles.js.
Only micromatch.isMatch() was used, which maps directly to
picomatch.isMatch(). picomatch has no dependencies and a smaller
install size (83 kB vs 235 kB).

Closes facebook#603

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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vercel bot commented Feb 26, 2026

@roli-lpci is attempting to deploy a commit to the Meta Open Source Team on Vercel.

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meta-cla bot commented Feb 26, 2026

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CLA has been signed.

@meta-cla meta-cla bot added the CLA Signed label Feb 26, 2026
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meta-cla bot commented Feb 26, 2026

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Meta Open Source project. Thanks!

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Replace micromatch dependency with a lighter alternative

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