add "print buckets" subcommand

main.go

@@ -9,7 +9,7 @@ import (
 	"github.com/boltdb/bolt"
 )
 
-const usage = "bdb <(w)rite|(r)ead> <db>"
+const usage = "bdb <(w)rite|(r)ead|(b)uckets> <db>"
 const queued = "queued"
 
 func main() {
@@ -20,7 +20,7 @@ func main() {
 	}
 
 	switch os.Args[1] {
-	case "write", "read", "w", "r":
+	case "write", "read", "w", "r", "buckets", "bkts", "b":
 	default:
 		fmt.Fprintf(os.Stderr, "%s\n", usage)
 		os.Exit(1)
@@ -79,5 +79,12 @@ func main() {
 
 			return nil
 		})
+	case "buckets", "bkts", "b":
+		db.View(func(tx *bolt.Tx) error {
+			return tx.ForEach(func(name []byte, _ *bolt.Bucket) error {
+				fmt.Printf("%s\n", name)
+				return nil
+			})
+		})
 	}
 }