use tags to select abdger db

db_badger.go

@@ -0,0 +1,14 @@
+// +build badger
+
+package main
+
+import (
+    "github.com/fiatjaf/eventstore/badger"
+)
+
+func getDB() badger.BadgerBackend {
+    return badger.BadgerBackend{
+        Path: getEnv("DB_PATH"),
+    }
+}
+

db_default.go

@@ -0,0 +1,14 @@
+// +build !badger
+
+package main
+
+import (
+    "github.com/fiatjaf/eventstore/lmdb"
+)
+
+func getDB() lmdb.LMDBBackend {
+    return lmdb.LMDBBackend{
+        Path: getEnv("DB_PATH"),
+    }
+}
+

main.go

@@ -11,7 +11,6 @@ import (
 	"time"
 
 	"github.com/cespare/xxhash"
-	"github.com/fiatjaf/eventstore/lmdb"
 	"github.com/fiatjaf/khatru"
 	"github.com/greatroar/blobloom"
 	"github.com/joho/godotenv"
@@ -62,9 +61,7 @@ func main() {
 	relay.Info.Description = config.RelayDescription
 	appendPubkey(config.RelayPubkey)
 
-	db := lmdb.LMDBBackend{
-		Path: config.DBPath,
-	}
+	db := getDB()
 	if err := db.Init(); err != nil {
 		panic(err)
 	}