47 lines
1.4 KiB
Go
47 lines
1.4 KiB
Go
package s1012
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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: "S1012",
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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: `Replace \'time.Now().Sub(x)\' with \'time.Since(x)\'`,
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Text: `The \'time.Since\' helper has the same effect as using \'time.Now().Sub(x)\'
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but is easier to read.`,
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Before: `time.Now().Sub(x)`,
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After: `time.Since(x)`,
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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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checkTimeSinceQ = pattern.MustParse(`(CallExpr (SelectorExpr (CallExpr (Symbol "time.Now") []) (Symbol "(time.Time).Sub")) [arg])`)
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checkTimeSinceR = pattern.MustParse(`(CallExpr (SelectorExpr (Ident "time") (Ident "Since")) [arg])`)
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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, checkTimeSinceQ) {
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edits := code.EditMatch(pass, node, m, checkTimeSinceR)
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report.Report(pass, node, "should use time.Since instead of time.Now().Sub",
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report.FilterGenerated(),
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report.Fixes(edit.Fix("Replace with call to time.Since", edits...)))
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}
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return nil, nil
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}
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