async issues processing

pkg/result/processors/max_per_file_from_linter.go

@@ -0,0 +1,51 @@
+package processors
+
+import (
+	"github.com/golangci/golangci-lint/pkg/golinters"
+	"github.com/golangci/golangci-lint/pkg/result"
+)
+
+type linterToCountMap map[string]int
+type fileToLinterToCountMap map[string]linterToCountMap
+
+type MaxPerFileFromLinter struct {
+	flc fileToLinterToCountMap
+}
+
+var _ Processor = &MaxPerFileFromLinter{}
+
+func NewMaxPerFileFromLinter() *MaxPerFileFromLinter {
+	return &MaxPerFileFromLinter{
+		flc: fileToLinterToCountMap{},
+	}
+}
+
+func (p MaxPerFileFromLinter) Name() string {
+	return "max_per_file_from_linter"
+}
+
+var maxPerFileFromLinterConfig = map[string]int{
+	golinters.Gofmt{}.Name():                   1,
+	golinters.Gofmt{UseGoimports: true}.Name(): 1,
+}
+
+func (p *MaxPerFileFromLinter) Process(issues []result.Issue) ([]result.Issue, error) {
+	return filterIssues(issues, func(i *result.Issue) bool {
+		limit := maxPerFileFromLinterConfig[i.FromLinter]
+		if limit == 0 {
+			return true
+		}
+
+		lm := p.flc[i.File]
+		if lm == nil {
+			p.flc[i.File] = linterToCountMap{}
+		}
+		count := p.flc[i.File][i.FromLinter]
+		if count >= limit {
+			return false
+		}
+
+		p.flc[i.File][i.FromLinter]++
+		return true
+	}), nil
+}