91 lines
2.2 KiB
Go
91 lines
2.2 KiB
Go
package golinters
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import (
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"sync"
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"golang.org/x/tools/go/analysis"
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"golang.org/x/tools/go/analysis/passes/buildssa"
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"golang.org/x/tools/go/packages"
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"mvdan.cc/unparam/check"
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"github.com/golangci/golangci-lint/pkg/config"
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"github.com/golangci/golangci-lint/pkg/golinters/goanalysis"
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"github.com/golangci/golangci-lint/pkg/lint/linter"
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"github.com/golangci/golangci-lint/pkg/result"
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)
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const unparamName = "unparam"
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func NewUnparam(settings *config.UnparamSettings) *goanalysis.Linter {
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var mu sync.Mutex
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var resIssues []goanalysis.Issue
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analyzer := &analysis.Analyzer{
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Name: unparamName,
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Doc: goanalysis.TheOnlyanalyzerDoc,
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Requires: []*analysis.Analyzer{buildssa.Analyzer},
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Run: func(pass *analysis.Pass) (interface{}, error) {
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issues, err := runUnparam(pass, settings)
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if err != nil {
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return nil, err
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}
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if len(issues) == 0 {
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return nil, nil
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}
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mu.Lock()
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resIssues = append(resIssues, issues...)
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mu.Unlock()
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return nil, nil
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},
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}
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return goanalysis.NewLinter(
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unparamName,
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"Reports unused function parameters",
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[]*analysis.Analyzer{analyzer},
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nil,
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).WithContextSetter(func(lintCtx *linter.Context) {
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if settings.Algo != "cha" {
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lintCtx.Log.Warnf("`linters-settings.unparam.algo` isn't supported by the newest `unparam`")
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}
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}).WithIssuesReporter(func(*linter.Context) []goanalysis.Issue {
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return resIssues
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}).WithLoadMode(goanalysis.LoadModeTypesInfo)
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}
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func runUnparam(pass *analysis.Pass, settings *config.UnparamSettings) ([]goanalysis.Issue, error) {
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ssa := pass.ResultOf[buildssa.Analyzer].(*buildssa.SSA)
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ssaPkg := ssa.Pkg
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pkg := &packages.Package{
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Fset: pass.Fset,
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Syntax: pass.Files,
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Types: pass.Pkg,
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TypesInfo: pass.TypesInfo,
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}
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c := &check.Checker{}
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c.CheckExportedFuncs(settings.CheckExported)
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c.Packages([]*packages.Package{pkg})
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c.ProgramSSA(ssaPkg.Prog)
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unparamIssues, err := c.Check()
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if err != nil {
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return nil, err
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}
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var issues []goanalysis.Issue
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for _, i := range unparamIssues {
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issues = append(issues, goanalysis.NewIssue(&result.Issue{
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Pos: pass.Fset.Position(i.Pos()),
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Text: i.Message(),
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FromLinter: unparamName,
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}, pass))
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}
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return issues, nil
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}
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