feat: rewrite fallback condition

Author: ldez

pkg/lint/linter/config.go

@@ -1,7 +1,8 @@
 package linter
 
 import (
-	"golang.org/x/tools/go/analysis"
+	"errors"
+
 	"golang.org/x/tools/go/packages"
 
 	"github.com/golangci/golangci-lint/pkg/config"
@@ -133,27 +134,24 @@ func (lc *Config) Name() string {
 	return lc.Linter.Name()
 }
 
-func (lc *Config) WithNoopFallback(cfg *config.Config, cond func(cfg *config.Config) bool) *Config {
-	if cfg != nil && cond(cfg) {
-		lc.Linter = &Noop{
-			name:   lc.Linter.Name(),
-			desc:   lc.Linter.Desc(),
-			reason: "This linter is disabled because the Go version of your project is lower than Go 1.22.",
-			run: func(_ *analysis.Pass) (any, error) {
-				return nil, nil
-			},
-		}
-
+func (lc *Config) WithNoopFallback(cfg *config.Config, cond func(cfg *config.Config) error) *Config {
+	if err := cond(cfg); err != nil {
+		lc.Linter = NewNoop(lc.Linter, err.Error())
 		lc.LoadMode = 0
+
 		return lc.WithLoadFiles()
 	}
 
 	return lc
 }
 
-func IsGoLowerThan(limit string) func(cfg *config.Config) bool {
-	return func(cfg *config.Config) bool {
-		return cfg != nil && !config.IsGoGreaterThanOrEqual(cfg.Run.Go, limit)
+func IsGoLowerThanGo122() func(cfg *config.Config) error {
+	return func(cfg *config.Config) error {
+		if cfg == nil || config.IsGoGreaterThanOrEqual(cfg.Run.Go, "1.22") {
+			return nil
+		}
+
+		return errors.New("this linter is disabled because the Go version of your project is lower than Go 1.22")
 	}
 }
 

pkg/lint/linter/linter.go

@@ -3,8 +3,6 @@ package linter
 import (
 	"context"
 
-	"golang.org/x/tools/go/analysis"
-
 	"github.com/golangci/golangci-lint/pkg/result"
 )
 
@@ -18,7 +16,14 @@ type Noop struct {
 	name   string
 	desc   string
 	reason string
-	run    func(pass *analysis.Pass) (any, error)
+}
+
+func NewNoop(l Linter, reason string) *Noop {
+	return &Noop{
+		name:   l.Name(),
+		desc:   l.Desc(),
+		reason: reason,
+	}
 }
 
 func (n Noop) Run(_ context.Context, lintCtx *Context) ([]result.Issue, error) {

pkg/lint/lintersdb/manager.go

@@ -304,7 +304,7 @@ func (m Manager) GetAllSupportedLinterConfigs() []*linter.Config {
 			WithSince("v1.57.0").
 			WithPresets(linter.PresetStyle).
 			WithURL("https://github.com/karamaru-alpha/copyloopvar").
-			WithNoopFallback(m.cfg, linter.IsGoLowerThan("1.22")),
+			WithNoopFallback(m.cfg, linter.IsGoLowerThanGo122()),
 
 		linter.NewConfig(golinters.NewCyclop(cyclopCfg)).
 			WithSince("v1.37.0").
@@ -619,7 +619,7 @@ func (m Manager) GetAllSupportedLinterConfigs() []*linter.Config {
 		linter.NewConfig(golinters.NewIntrange()).
 			WithSince("v1.57.0").
 			WithURL("https://github.com/ckaznocha/intrange").
-			WithNoopFallback(m.cfg, linter.IsGoLowerThan("1.22")),
+			WithNoopFallback(m.cfg, linter.IsGoLowerThanGo122()),
 
 		linter.NewConfig(golinters.NewIreturn(ireturnCfg)).
 			WithSince("v1.43.0").