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Add removeUnused mode #202

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bulldozer-bot[bot] merged 4 commits intodevelopfrom
okelvin/remove-unused-pr
Oct 23, 2025
Merged

Add removeUnused mode #202
bulldozer-bot[bot] merged 4 commits intodevelopfrom
okelvin/remove-unused-pr

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@kelvinou01 kelvinou01 commented Oct 17, 2025 •
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Before this PR

See #173 for background

FLUP to #192, #200, #203

Features

  • removeUnused mode removes all unused error-prone suppressions (both human-authored and for-rollout suppressions) in all compilation units
  • Only removes error-prone suppressions, and ignores unknown ones like checkstyles or SomeRandomSuppression
  • Works seamlessly with apply and suppress mode, allowing you to remove unused + apply + suppress in one compilation

After this PR

==COMMIT_MSG==
Add removeUnused mode
==COMMIT_MSG==

Possible downsides?

  • Adds yet another layer of complexity onto VisitorStateModifications, e.g. the SuppressibleErrorProne check used to prevent infinite recursion when calling state.reportMatch
  • Maybe performance regressions?

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changelog-app bot commented Oct 17, 2025 •
edited by kelvinou01
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Type (Select exactly one)

  • Feature (Adding new functionality)
  • Improvement (Improving existing functionality)
  • Fix (Fixing an issue with existing functionality)
  • Break (Creating a new major version by breaking public APIs)
  • Deprecation (Removing functionality in a non-breaking way)
  • Migration (Automatically moving data/functionality to a new system)

Description

Add removeUnused mode

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✨ Features

  • Add removeUnused mode (#202)

@kelvinou01 kelvinou01 marked this pull request as draft October 17, 2025 12:53
@kelvinou01 kelvinou01 force-pushed the okelvin/remove-unused-pr branch 2 times, most recently from 79ab57d to a25c7f4 Compare October 22, 2025 09:01
@kelvinou01 kelvinou01 force-pushed the okelvin/remove-unused-pr branch from a25c7f4 to 27f96dd Compare October 22, 2025 09:08
@kelvinou01 kelvinou01 marked this pull request as ready for review October 22, 2025 09:09
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kelvinou01 commented Oct 22, 2025

FLUPS: #203 (comment)

CRogers
CRogers reviewed Oct 22, 2025
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Comment thread ...error-prone/src/main/java/com/palantir/suppressibleerrorprone/VisitorStateModifications.java Outdated
private static final Logger log = Logger.getLogger(VisitorStateModifications.class.getName());

private static final ReportedFixCache FIXES = new ReportedFixCache();
private static final Set<CompilationUnitTree> SEEN = new HashSet<>();
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@CRogers CRogers Oct 22, 2025 •
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Let's give SEEN a slightly better name - maybe ALREADY_REMOVED_EXISTING_SUPPRESSIONS?

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Actually, I think we should make a new type to remove some code from VisitorStateModifications. It can hold and manage this Set, then have the removeAllSuppressionsOnErrorpronesInCompilationUnit method in there too.

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Similar to ReportedFixCache (will need to take it as a field)

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@kelvinou01 kelvinou01 Oct 22, 2025

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Yep, I've created a SuppressionRemover which encapsulates a weak set and the "report on everything" logic.

@kelvinou01 kelvinou01 force-pushed the okelvin/remove-unused-pr branch from 5a1d8f3 to c642485 Compare October 22, 2025 16:56
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CRogers commented Oct 23, 2025

👍

@bulldozer-bot bulldozer-bot bot merged commit 691db97 into develop Oct 23, 2025
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@bulldozer-bot bulldozer-bot bot deleted the okelvin/remove-unused-pr branch October 23, 2025 13:26
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autorelease3 bot commented Oct 23, 2025

Released 2.24.0

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