WIP: migrations

source/db/migrations/migration.d

@@ -0,0 +1,31 @@
+module db.migrations.migration;
+
+import singletons;
+import db.migrations.m_001_initial;
+
+struct Migration {
+  string[] upStatements;
+  string[] downStatements;
+
+  bool up() {
+    int result;
+
+    foreach (string statement; upStatements)
+      result |= Db.runUpdate(statement);
+
+    return result == 0;
+  }
+
+  bool down() {
+    int result;
+
+    foreach (string statement; downStatements)
+      result |= Db.runUpdate(statement);
+
+    return result == 0;
+  }
+}
+
+Migration[string] migrations = [
+  "001_initial": Initial,
+];