replace modules with go plugins.

internal/config/plugins.go

@@ -0,0 +1,30 @@
+package config
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+type Plugins struct {
+	Enabled bool
+	Dir     string
+}
+
+func (Plugins) Init(cmd *cobra.Command) error {
+	cmd.PersistentFlags().Bool("plugins.enabled", false, "load plugins in runtime")
+	if err := viper.BindPFlag("plugins.enabled", cmd.PersistentFlags().Lookup("plugins.enabled")); err != nil {
+		return err
+	}
+
+	cmd.PersistentFlags().String("plugins.dir", "./bin/plugins", "path to neko plugins to load")
+	if err := viper.BindPFlag("plugins.dir", cmd.PersistentFlags().Lookup("plugins.dir")); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (s *Plugins) Set() {
+	s.Enabled = viper.GetBool("plugins.enabled")
+	s.Dir = viper.GetString("plugins.dir")
+}