logcheck: support new golangci-lint plugin interface

The new plugin interface was added in golangci/golangci-lint#3887
to allow settings for custom plugins. This commit implements the new
plugin interface with find `config` value in the settings, and passes it
to flag `--config`.

go.mod

@@ -1,4 +1,4 @@
-module sigs.k8s.io/logtools
+module github.com/linxiulei/logtools
 
 go 1.15
 

logcheck/plugin/plugin.go

@@ -33,3 +33,17 @@ func (*analyzerPlugin) GetAnalyzers() []*analysis.Analyzer {
 
 // AnalyzerPlugin is the entry point for golangci-lint.
 var AnalyzerPlugin analyzerPlugin
+
+// New is the enry point for golangci-lint, which takes priority over AnalyzerPlugin.
+func New(conf any) []*analysis.Analyzer {
+	a := pkg.Analyser()
+	conf, ok := conf.(map[string]any)
+	if !ok {
+		return []*analysis.Analyzer{a}
+	}
+
+	if config, ok := conf["config"]; ok {
+		a.Flags.Set("config", config)
+	}
+	return []*analysis.Analyzer{a}
+}