chore(plugins): replace viper.ConfigFileUsed() by cfg.GetConfigDir()

Author: ldez

pkg/lint/lintersdb/custom_linters.go

@@ -6,7 +6,6 @@ import (
 	"path/filepath"
 	"plugin"
 
-	"github.com/spf13/viper"
 	"golang.org/x/tools/go/analysis"
 
 	"github.com/golangci/golangci-lint/pkg/config"
@@ -67,12 +66,7 @@ func (m *Manager) loadCustomLinterConfig(name string, settings config.CustomLint
 func (m *Manager) getAnalyzerPlugin(path string, settings any) ([]*analysis.Analyzer, error) {
 	if !filepath.IsAbs(path) {
 		// resolve non-absolute paths relative to config file's directory
-		configFilePath := viper.ConfigFileUsed()
-		absConfigFilePath, err := filepath.Abs(configFilePath)
-		if err != nil {
-			return nil, fmt.Errorf("could not get absolute representation of config file path %q: %w", configFilePath, err)
-		}
-		path = filepath.Join(filepath.Dir(absConfigFilePath), path)
+		path = filepath.Join(m.cfg.GetConfigDir(), path)
 	}
 
 	plug, err := plugin.Open(path)