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refactor(linters): hoist duplicated analyzer helpers into astutil/analyzerutil - #53564
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Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>
Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>
Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>
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✅ Test Quality Sentinel completed test quality analysis. Test Quality Sentinel skipped because pre-fetch PR data was unavailable: unable to fetch test file diff
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🧠 Matt Pocock Skills Reviewer has completed the skills-based review. ✅
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✅ Ponytail Reviewer completed successfully! Ponytail review: this PR is itself a de-duplication refactor (hoisting repeated analyzer boilerplate into analyzerutil.Indexes and shared astutil helpers). Checked the new shared helpers (Indexes, IsRegexpCompileCall, HasConstantStringArg, NormalizeComparisonOperands, SwapPkgImportEdits, StringLitValue, UniverseErrorInterface, IsInInitFunction) against their call sites -- each has 2+ real callers immediately, no speculative generality or unused flexibility introduced. The regexpcompileinfunction/regexpdynamicpattern POSIX-variant fix is a correctness alignment, not scope creep. Lean already. Ship. net: -0 lines possible.
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✅ PR Code Quality Reviewer completed the code quality review.
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Request changes
This refactor introduced at least one real regression: sprintferrdot now misclassifies fmt.Fscanf as a formatting API and will report bogus .Error() diagnostics on scan destinations.
Blocking theme
pkg/linters/sprintferrdot: scan functions were folded into formatting analysis, which changes analyzer behavior and creates false positives.
The rest of the helper extractions look mostly mechanical, but this regression is enough to block because it makes the linter incorrect.
🔎 Code quality review by PR Code Quality Reviewer · gpt54 · 14 AIC · ⌖ 6.94 AIC · ⊞ 7K
Comment /review to run again
Comments that could not be inline-anchored
pkg/linters/sprintferrdot/sprintferrdot.go:101
This refactor accidentally widens sprintferrdot from format functions to scan functions by treating fmt.Fscanf as if its variadic arguments were values being formatted, so fmt.Fscanf(r, "%s", err.Error()) will now be flagged even though %s is consuming input rather than formatting an error.
<details><summary>💡 Why this blocks</summary>
The old helper extraction looked mechanical, but fmtFormatCallInfo now classifies Fscanf alongside Fprintf/Sprintf:
case"Fprintf", "Fs…
</details>There was a problem hiding this comment.
Review: refactor(linters) — hoist duplicated analyzer helpers into astutil/analyzerutil
The refactoring is clean and well-motivated. All linters consistently adopt analyzerutil.Indexes(), the new helper functions in astutil are well-documented, and the tests provide good coverage.
One blocking issue found:
HasConstantStringArg dereferences pass.TypesInfo without a nil guard, which will panic at runtime if TypesInfo is nil. The adjacent IsRegexpCompileCall function (added in the same commit) correctly guards with if !ok || pass.TypesInfo == nil { return false }. The same pattern should be applied here.
Non-blocking observations
SwapPkgImportEditsreturns(nil, true)in two branches (needAddonly andremoveOrphanedonly) when the underlying edit helper returns(_, false). This is consistent with the existingAddImportEdit/RemoveImportEditcontracts, but callers should be aware thatneeded == truedoes not guarantee a non-empty edit slice.- The
IsInInitFunctioncursor loop is clear, but the comment "A node whose innermost enclosing function is a literal ... is not considered to be in init" could note that this applies transitively (any depth of nesting inside a func literal resets the answer to false).
🧵 Reviewed using Impeccable skills by Impeccable Skills Reviewer · sonnet46 · 50 AIC · ⌖ 8.96 AIC · ⊞ 5.7K
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Pull request overview
Centralizes duplicated linter logic in shared analyzer/AST utilities, while expanding regexp and parenthesized-comparison coverage. Two unrelated workflow lock changes also disable strict compilation.
Changes:
- Added shared analyzer indexes and AST helpers with unit tests.
- Migrated analyzers and expanded regexp/comparison test coverage.
- Regenerated two workflow locks with unrelated strict-mode changes.
Show a summary per file
| File | Description |
|---|---|
pkg/linters/writebytestring/writebytestring.go | Uses shared index setup. |
pkg/linters/wgdonenotdeferred/wgdonenotdeferred.go | Uses shared index setup. |
pkg/linters/walkfuncerrshadow/walkfuncerrshadow.go | Uses shared index setup. |
pkg/linters/uncheckedtypeassertion/uncheckedtypeassertion.go | Uses shared index setup. |
pkg/linters/uncheckedflushreturn/uncheckedflushreturn.go | Uses shared index setup. |
pkg/linters/trimleftright/trimleftright.go | Reuses string-literal helper. |
pkg/linters/tolowerequalfold/tolowerequalfold.go | Reuses string-literal helper. |
pkg/linters/timesleepnocontext/timesleepnocontext.go | Uses shared index setup. |
pkg/linters/timenowsub/timenowsub.go | Uses shared index setup. |
pkg/linters/timeafterleak/timeafterleak.go | Uses shared index setup. |
pkg/linters/stringsjoinone/stringsjoinone.go | Uses shared index setup. |
pkg/linters/stringsindexhasprefix/stringsindexhasprefix.go | Reuses comparison normalization. |
pkg/linters/stringsindexcontains/testdata/src/stringsindexcontains/stringsindexcontains.go.golden | Adds expected parenthesized fixes. |
pkg/linters/stringsindexcontains/testdata/src/stringsindexcontains/stringsindexcontains.go | Tests parenthesized comparisons. |
pkg/linters/stringsindexcontains/stringsindexcontains.go | Reuses comparison normalization. |
pkg/linters/stringscountcontains/testdata/src/stringscountcontains/stringscountcontains.go.golden | Adds expected parenthesized fixes. |
pkg/linters/stringscountcontains/testdata/src/stringscountcontains/stringscountcontains.go | Tests parenthesized comparisons. |
pkg/linters/stringscountcontains/stringscountcontains.go | Reuses comparison normalization. |
pkg/linters/stringsconcatloop/stringsconcatloop.go | Uses shared index setup. |
pkg/linters/stringreplaceminusone/stringreplaceminusone.go | Uses shared index setup. |
pkg/linters/stringbytesroundtrip/stringbytesroundtrip.go | Uses shared index setup. |
pkg/linters/strconvparseignorederror/strconvparseignorederror.go | Uses shared index setup. |
pkg/linters/sprintfint/sprintfint.go | Reuses package-import edits. |
pkg/linters/sprintferrorsnew/sprintferrorsnew.go | Uses shared index setup. |
pkg/linters/sprintferrdot/sprintferrdot.go | Reuses built-in error helper. |
pkg/linters/sprintfbool/sprintfbool.go | Reuses package-import edits. |
pkg/linters/sortslice/sortslice.go | Uses shared index setup. |
pkg/linters/seenmapbool/seenmapbool.go | Uses shared index setup. |
pkg/linters/regexpdynamicpattern/regexpdynamicpattern.go | Reuses regexp and constant helpers. |
pkg/linters/regexpcompileinfunction/testdata/src/regexpcompileinfunction/regexpcompileinfunction.go | Tests POSIX regexp detection. |
pkg/linters/regexpcompileinfunction/testdata/src/regexpcompileinfunction/dot_import.go | Updates helper reference. |
pkg/linters/regexpcompileinfunction/regexpcompileinfunction.go | Adds POSIX coverage via shared helpers. |
pkg/linters/README.md | Documents POSIX regexp coverage. |
pkg/linters/rawloginlib/rawloginlib.go | Uses shared index setup. |
pkg/linters/panic-in-library-code/panic-in-library-code.go | Reuses init-function detection. |
pkg/linters/packagelevelmutableslicemap/packagelevelmutableslicemap.go | Reuses init-function detection. |
pkg/linters/ossetenvlibrary/ossetenvlibrary.go | Uses shared index setup. |
pkg/linters/osgetenvlibrary/osgetenvlibrary.go | Uses shared index setup. |
pkg/linters/osexitinlibrary/osexitinlibrary.go | Uses shared index setup. |
pkg/linters/nilctxpassed/nilctxpassed.go | Uses shared index setup. |
pkg/linters/mapdeletecheck/mapdeletecheck.go | Uses shared index setup. |
pkg/linters/mapclearloop/mapclearloop.go | Uses shared index setup. |
pkg/linters/logfatallibrary/logfatallibrary.go | Uses shared index setup. |
pkg/linters/lenstringzero/lenstringzero.go | Uses shared index setup. |
pkg/linters/lenstringsplit/lenstringsplit.go | Uses shared index setup. |
pkg/linters/largefunc/largefunc.go | Uses shared index setup. |
pkg/linters/jsonmarshalignoredeerror/jsonmarshalignoredeerror.go | Uses shared index setup. |
pkg/linters/ioutildeprecated/ioutildeprecated.go | Uses shared index setup. |
pkg/linters/internal/resourcetracker/resourcetracker.go | Uses shared index setup. |
pkg/linters/internal/astutil/astutil.go | Adds shared AST/type helpers. |
pkg/linters/internal/astutil/astutil_test.go | Tests the new AST helpers. |
pkg/linters/internal/analyzerutil/analyzerutil.go | Adds shared index retrieval. |
pkg/linters/internal/analyzerutil/analyzerutil_test.go | Tests shared index retrieval. |
pkg/linters/httpstatuscode/httpstatuscode.go | Uses shared index setup. |
pkg/linters/httprespbodyclose/httprespbodyclose.go | Uses shared index setup. |
pkg/linters/httpnoctx/httpnoctx.go | Uses shared index setup. |
pkg/linters/hardcodedfilepath/hardcodedfilepath.go | Uses shared index setup. |
pkg/linters/goroutinemissingrecover/goroutinemissingrecover.go | Uses shared index setup. |
pkg/linters/globwalkignorederror/globwalkignorederror.go | Uses shared index setup. |
pkg/linters/generatedyamlheredoc/generatedyamlheredoc.go | Uses shared index setup. |
pkg/linters/fprintlnsprintf/fprintlnsprintf.go | Uses shared index setup. |
pkg/linters/fmterrorfnoverbs/fmterrorfnoverbs.go | Uses shared index setup. |
pkg/linters/execcommandwithoutcontext/execcommandwithoutcontext.go | Uses shared index setup. |
pkg/linters/excessivefuncparams/excessivefuncparams.go | Uses shared index setup. |
pkg/linters/errstringmatch/errstringmatch.go | Uses shared index setup. |
pkg/linters/errortypeassertion/errortypeassertion.go | Uses shared index setup. |
pkg/linters/errormessage/errormessage.go | Uses shared index setup. |
pkg/linters/errorfwrapv/errorfwrapv.go | Reuses built-in error helper. |
pkg/linters/deferinloop/deferinloop.go | Uses shared index setup. |
pkg/linters/ctxbackground/ctxbackground.go | Uses shared index setup. |
pkg/linters/bytescomparestring/bytescomparestring.go | Uses shared index setup. |
pkg/linters/bytesbufferstring/bytesbufferstring.go | Uses shared index setup. |
pkg/linters/appendoneelement/appendoneelement.go | Uses shared index setup. |
pkg/linters/appendbytestring/appendbytestring.go | Uses shared index setup. |
.github/workflows/mcp-inspector.lock.yml | Disables strict compilation. |
.github/workflows/daily-team-evolution-insights.lock.yml | Disables strict compilation. |
Review details
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- Files reviewed: 76/76 changed files
- Comments generated: 2
- Review effort level: Balanced
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Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
🏗️ Design Decision Gate — ADR RequiredThis PR makes significant changes to core business logic (682 new lines in 📄 Draft ADR committed:
📋 What to do next
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ADRs create a searchable, permanent record of why the codebase looks the way it does. Future contributors (and your future self) will thank you. 📋 Michael Nygard ADR Format ReferenceAn ADR must contain these four sections to be considered complete:
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PR #53564 Review SummaryApplied 📋 Issues found (6 inline comments)
@copilot please address the review comments above.
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There was a problem hiding this comment.
Skills-Based Review 🧠
Applied /codebase-design and /tdd — requesting changes on test-coverage gaps and one interface-clarity issue.
📋 Key Themes & Highlights
Key Themes
- Test coverage gaps — Several new helpers lack tests for their documented edge cases: constant-concat args in
HasConstantStringArg, nil-TypesInfoguard inIsRegexpCompileCall, FuncLit-inside-initinIsInInitFunction, and the malformed-filecheck error path inIndexes. - Interface contract ambiguity —
NormalizeComparisonOperandsreturnsflipped=trueeven when no strings call is found; callers must independently guard withAsStringsMethodCall, but the signature doesn't make this mandatory. - Encapsulation leaks —
regexpcompileinfunction(and likely other callers offilecheck.ShouldSkipFilename) still imports the internalfilecheckpackage despiteanalyzerutil.Indexesbeing introduced to hide it. The abstraction is incomplete.
Positive Highlights
- ✅ Excellent mechanical consistency — the
analyzerutil.Indexesone-liner refactors across 63 analyzers are clean and risk-free. - ✅ Behavioral fix for the
MustCompilePOSIX/CompilePOSIXdivergence is well-scoped and the testdata is updated. - ✅
HasConstantStringArg(argIdx)takes an explicit index and guards out-of-range cleanly. - ✅
SwapPkgImportEditshas thorough table-driven test coverage. - ✅
NormalizeComparisonOperandsnow applies paren-unwrapping to all three callers — good consistency win.
🧠 Reviewed using Matt Pocock's skills by Matt Pocock Skills Reviewer · sonnet46 · 115.8 AIC · ⌖ 12 AIC · ⊞ 7.8K
Comment /matt to run again
Comments that could not be inline-anchored
pkg/linters/internal/astutil/astutil_test.go:1228
[/tdd]TestIsInInitFunction doesn't cover a goroutine started frominit() — the spec comment says it should return false, but there's no test case for it.
<details>
<summary>💡 Suggested additional test case</summary>
The function initWithLit in the current test is not named init, so it doesn't exercise the documented invariant. The uncovered case is a FuncLit insideinit itself:
funcinit() {
gofunc() {
println("ingoroutineinsideinit") // should be …</details><details><summary>pkg/linters/internal/astutil/astutil_test.go:1133</summary>**[/tdd]**`TestHasConstantStringArg`doesn'ttestaconcatenationoftwostringconstants — whichthedocsaysshouldreturn`true`. Missingthisedgecaseleavesagapbetweenthespecandthetests.
<details>
<summary>💡 Suggestedaddition</summary>
```go
const a = "x"
const b = "y"
sink(a + b) // compile-time constant concat — should return trueThis is the classic "expression built entirely from constants" case mentioned in the doc comment. Without it, a future refactor that breaks …
pkg/linters/internal/analyzerutil/analyzerutil_test.go:104
[/tdd]TestIndexesError only tests a malformed nolint result; there's no error-path test for a malformed filecheck result. If filecheck.Index is ever refactored to return a different type, the second error branch would silently regress.
<details>
<summary>💡 Suggested additional case</summary>
funcTestIndexesErrorFilecheck(t*testing.T) {
pass:=&analysis.Pass{
ResultOf: map[*analysis.Analyzer]any{
nolint.Analyzer: nolint.DirectiveIndex{},
…
</details><details><summary>pkg/linters/internal/astutil/astutil.go:779</summary>**[/codebase-design]**`NormalizeComparisonOperands`swapsoperandswhenthestringsmethodisontheright, returning`(y, x, true)`. Butwhen*neither*operandisthestringscall, itreturns`(y, x, true)` — meaning`left`isnotthestringscalland`flipped`ismisleadingly`true`. Callersthatrelyon`flipped`toreconstructtheoperatordirectionwillgetanincorrectresult.
<details>
<summary>💡 Detailandfixsuggestion</summary>
Thetestatline1181confirmsthis: whenneitherop…
</details><details><summary>pkg/linters/regexpcompileinfunction/regexpcompileinfunction.go:14</summary>**[/codebase-design]**Thelinterstillimports`filecheck`and`nolint`directlyeventhough`analyzerutil.Indexes`nowwraps them. Theseimportsareonlyneededbecause`filecheck.ShouldSkipFilename`iscalleddirectlyonline50.Considerwhether`ShouldSkipFilename`shouldalsobesurfacedthrough`analyzerutil` (or`astutil`) tocompletetheencapsulation — otherwisecallersstillneedtoknowabouttheinternalpackages.
<details>
<summary>💡 Whythismatters</summary>
Thegoalof`anal…</details><details><summary>pkg/linters/internal/astutil/astutil.go:743</summary>**[/tdd]** `IsRegexpCompileCall` falls through silently when `pass.TypesInfo` is `nil` (the `!ok||pass.TypesInfo==nil` branch returns `false`). This is a correctness guard, but there's no test asserting the nil-TypesInfo path returns `false` without panicking.<details><summary>💡 Suggested test</summary>```go
// nil TypesInfo must not panic
call := &ast.CallExpr{
Fun: &ast.SelectorExpr{
X: ast.NewIdent("regexp"),
Sel: ast.NewIdent("MustCompile"),
},
}
passNilInf…
</details>
PR finisher pass completed on
Hand-off: maintainer needs to re-trigger CI, resolve the already-addressed/outdated review threads, and decide whether to handle the unrelated JS Prettier drift separately before merge. |
TriageCategory: refactor | Risk: medium | Priority: medium | Score: 55/100 (impact:25, urgency:10, quality:20)
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gh-aw-bot
commented
Aug 18, 2026
@copilot Please address the blocking review feedback below, refresh the branch if needed, then run the
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PR finisher pass completed on
Hand-off: maintainers should resolve the already-addressed/outdated review threads in the UI and re-trigger CI if a fresh run is required for merge. |
gh-aw-bot
commented
Aug 18, 2026
Caution agentic threat detected DetailsPotential security threats were detected in the agent output. Review the workflow run logs for details. @copilot Please address the blocking review feedback below, refresh the branch if needed, then run the
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Confirmed on
Remaining blocker: I do not have a thread-resolve API in this sandbox, so maintainers need to resolve the already-addressed/outdated threads in the UI. |
gh-aw-bot
commented
Aug 18, 2026
@copilot Please confirm the current state of the addressed review feedback on this PR, identify which remaining threads can now be resolved in the UI, and run the
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Confirmed on Remaining UI cleanup can resolve these already-addressed threads:
Branch status: refreshed locally; |
gh-aw-bot
commented
Aug 18, 2026
@copilot Please confirm the current state of the addressed review feedback on this PR, refresh the branch if needed, then run the
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Confirmed on Current state:
Remaining work appears limited to maintainer thread resolution / stale review cleanup / final CI confirmation. |
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…lyzerutil (#53564) Co-authored-by: gh-aw-bot <259018956+gh-aw-bot@users.noreply.github.com>
🎉 This pull request is included in a new release. Release: |
Semantic clustering of
pkg/lintersfound 8 clusters of duplicated helper logic re-implemented per analyzer package, despiteinternal/astutilandinternal/analyzerutilalready existing for exactly this purpose. One of the duplicates had silently diverged.Changes
analyzerutil.IndexesEvery one of the 63 analyzers opened
runwith the same ten lines. Now:Both indexes are a guaranteed consequence of the
Requireslist already declared byanalyzerutil.NewAtPath. Also applied tointernal/resourcetracker.New
astutilhelpersIsRegexpCompileCall(pass, call, names...)isRegexpCompileCallHasConstantStringArg(pass, call, argIdx)hasConstantStringPatternUniverseErrorInterface()sprintferrdot,errorfwrapvStringLitValue(expr)trimleftright,tolowerequalfoldIsInInitFunction(cur)packagelevelmutableslicemap,panic-in-library-codeNormalizeComparisonOperands(pass, expr, method)normalizeOperandsSwapPkgImportEdits(...)buildImportEditsinsprintfbool/sprintfintHasConstantStringArgtakes an explicit index and guards out-of-range values;SwapPkgImportEditsleaves the orphan-fmtdetermination (which genuinely differs between the two callers) at the call site.Behavioral changes worth reviewing
regexpcompileinfunctionnow coversMustCompilePOSIX/CompilePOSIX. This was the divergence:regexpdynamicpatternmatched four names,regexpcompileinfunctiononly two, so the package-level-hoisting rationale silently didn't apply to POSIX compiles. Each linter now passes its name set explicitly. Package doc, analyzer description,README.mdand testdata updated.NormalizeComparisonOperandsunwraps redundant parentheses for all three callers. Previously onlystringsindexhasprefixdid;stringsindexcontainsandstringscountcontainsnow match(strings.Index(s, sub)) != -1and gain testdata +.goldencases.Tests
Unit tests for each new helper in
astutil_test.go/analyzerutil_test.go, plus new analyzer testdata for the newly covered patterns. All existingpkg/linterstestdata suites pass unchanged.Caution
agentic threat detected
Threat detection flagged this output in warn mode. Manual review is REQUIRED before any follow-up automation.
Details
Potential security threats were detected in the agent output.
Review the workflow run logs for details.
Run: https://github.com/github/gh-aw/actions/runs/32109331559> Generated by 👨🍳 PR Sous Chef · gpt54 · 30 AIC · ⌖ 11.4 AIC · ⊞ 8.8K · ◷