feat: expose createMigrationBuilder to allow using this lib as sql bu…

…ilder

src/index.ts

@@ -266,3 +266,4 @@ export { PgType } from './types';
 export type { MigrationBuilder, RunnerOption } from './types';
 export { PgLiteral, isPgLiteral } from './utils';
 export type { PgLiteralValue } from './utils';
+export { createMigrationBuilder } from './migrationBuilder';

src/migrationBuilder.ts

@@ -531,3 +531,29 @@ export default class MigrationBuilderImpl implements MigrationBuilder {
     return this._REVERSE_MODE ? [...this._steps].reverse() : this._steps;
   }
 }
+
+export function createMigrationBuilder({
+  db,
+  typeShorthands,
+  shouldDecamelize,
+  logger,
+}: {
+  db?: DB;
+  typeShorthands: ColumnDefinitions | undefined;
+  shouldDecamelize: boolean;
+  logger: Logger;
+}): MigrationBuilderImpl {
+  return new MigrationBuilderImpl(
+    db || {
+      select: () => {
+        throw new Error('Not implemented');
+      },
+      query: () => {
+        throw new Error('Not implemented');
+      },
+    },
+    typeShorthands,
+    shouldDecamelize,
+    logger
+  );
+}