Deprecate Interfacer linter

Add `Deprecated` function to config that accepts a message as a deprecation reason.
Print a warning if a deprecated linter is enabled.

Deprecate the Interfacer linter due to archived repository.

Author: Sergey Vilgelm

pkg/lint/linter/config.go

@@ -22,10 +22,11 @@ type Config struct {
 	InPresets        []string
 	AlternativeNames []string
 
-	OriginalURL     string // URL of original (not forked) repo, needed for autogenerated README
-	CanAutoFix      bool
-	IsSlow          bool
-	DoesChangeTypes bool
+	OriginalURL       string // URL of original (not forked) repo, needed for autogenerated README
+	CanAutoFix        bool
+	IsSlow            bool
+	DoesChangeTypes   bool
+	DeprecatedMessage string
 }
 
 func (lc *Config) ConsiderSlow() *Config {
@@ -73,6 +74,15 @@ func (lc *Config) WithChangeTypes() *Config {
 	return lc
 }
 
+func (lc *Config) Deprecated(message string) *Config {
+	lc.DeprecatedMessage = message
+	return lc
+}
+
+func (lc *Config) IsDeprecated() bool {
+	return lc.DeprecatedMessage != ""
+}
+
 func (lc *Config) AllNames() []string {
 	return append([]string{lc.Name()}, lc.AlternativeNames...)
 }

pkg/lint/lintersdb/manager.go

@@ -177,7 +177,8 @@ func (m Manager) GetAllSupportedLinterConfigs() []*linter.Config {
 		linter.NewConfig(golinters.NewInterfacer()).
 			WithLoadForGoAnalysis().
 			WithPresets(linter.PresetStyle).
-			WithURL("https://github.com/mvdan/interfacer"),
+			WithURL("https://github.com/mvdan/interfacer").
+			Deprecated("The repository of the linter has been archived by the owner."),
 		linter.NewConfig(golinters.NewUnconvert()).
 			WithLoadForGoAnalysis().
 			WithPresets(linter.PresetStyle).

pkg/lint/runner.go

@@ -50,6 +50,13 @@ func NewRunner(cfg *config.Config, log logutils.Log, goenv *goutil.Env, es *lint
 		return nil, errors.Wrap(err, "failed to get enabled linters")
 	}
 
+	// print deprecated messages
+	for name, lc := range enabledLinters {
+		if lc.IsDeprecated() {
+			log.Warnf("The linter '%s' is deprecated due to: %s", name, lc.DeprecatedMessage)
+		}
+	}
+
 	return &Runner{
 		Processors: []processors.Processor{
 			processors.NewCgo(goenv),