66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
package golinters
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import (
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"fmt"
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"sync"
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"github.com/alexkohler/prealloc/pkg"
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"golang.org/x/tools/go/analysis"
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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 preallocName = "prealloc"
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//nolint:dupl
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func NewPreAlloc(settings *config.PreallocSettings) *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: preallocName,
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Doc: goanalysis.TheOnlyanalyzerDoc,
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Run: func(pass *analysis.Pass) (interface{}, error) {
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issues := runPreAlloc(pass, settings)
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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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preallocName,
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"Finds slice declarations that could potentially be pre-allocated",
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[]*analysis.Analyzer{analyzer},
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nil,
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).WithIssuesReporter(func(*linter.Context) []goanalysis.Issue {
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return resIssues
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}).WithLoadMode(goanalysis.LoadModeSyntax)
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}
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func runPreAlloc(pass *analysis.Pass, settings *config.PreallocSettings) []goanalysis.Issue {
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var issues []goanalysis.Issue
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hints := pkg.Check(pass.Files, settings.Simple, settings.RangeLoops, settings.ForLoops)
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for _, hint := range hints {
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issues = append(issues, goanalysis.NewIssue(&result.Issue{
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Pos: pass.Fset.Position(hint.Pos),
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Text: fmt.Sprintf("Consider pre-allocating %s", formatCode(hint.DeclaredSliceName, nil)),
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FromLinter: preallocName,
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}, pass))
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}
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return issues
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}
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