46 lines
1.4 KiB
Go
46 lines
1.4 KiB
Go
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package s1028
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import (
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"honnef.co/go/tools/analysis/code"
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"honnef.co/go/tools/analysis/edit"
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"honnef.co/go/tools/analysis/facts/generated"
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"honnef.co/go/tools/analysis/lint"
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"honnef.co/go/tools/analysis/report"
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"honnef.co/go/tools/pattern"
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"golang.org/x/tools/go/analysis"
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)
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var SCAnalyzer = lint.InitializeAnalyzer(&lint.Analyzer{
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Analyzer: &analysis.Analyzer{
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Name: "S1028",
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Run: run,
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Requires: append([]*analysis.Analyzer{generated.Analyzer}, code.RequiredAnalyzers...),
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},
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Doc: &lint.RawDocumentation{
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Title: `Simplify error construction with \'fmt.Errorf\'`,
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Before: `errors.New(fmt.Sprintf(...))`,
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After: `fmt.Errorf(...)`,
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Since: "2017.1",
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MergeIf: lint.MergeIfAny,
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},
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})
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var Analyzer = SCAnalyzer.Analyzer
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var (
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checkErrorsNewSprintfQ = pattern.MustParse(`(CallExpr (Symbol "errors.New") [(CallExpr (Symbol "fmt.Sprintf") args)])`)
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checkErrorsNewSprintfR = pattern.MustParse(`(CallExpr (SelectorExpr (Ident "fmt") (Ident "Errorf")) args)`)
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)
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func run(pass *analysis.Pass) (any, error) {
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for node, m := range code.Matches(pass, checkErrorsNewSprintfQ) {
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edits := code.EditMatch(pass, node, m, checkErrorsNewSprintfR)
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// TODO(dh): the suggested fix may leave an unused import behind
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report.Report(pass, node, "should use fmt.Errorf(...) instead of errors.New(fmt.Sprintf(...))",
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report.FilterGenerated(),
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report.Fixes(edit.Fix("Use fmt.Errorf", edits...)))
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}
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return nil, nil
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}
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