release: WRNexusJS 0.4.0

packages/db/src/migrate.ts

@@ -63,21 +63,26 @@ export async function appliedMigrations(db: Db): Promise<string[]> {
   return rows.map((r) => r.name);
 }
 
-/** Apply all pending migrations (each in a transaction). Returns applied names. */
-export async function migrate(db: Db, dir: string): Promise<string[]> {
+/** Apply an ordered migration list (each in a transaction). Returns applied names. */
+export async function applyMigrations(db: Db, migrations: readonly Migration[]): Promise<string[]> {
   const applied = new Set(await appliedMigrations(db));
-  const pending = loadMigrations(dir).filter((m) => !applied.has(m.name));
+  const pending = migrations.filter((migration) => !applied.has(migration.name));
   const done: string[] = [];
-  for (const m of pending) {
+  for (const migration of pending) {
     await db.tx(async (tx) => {
-      if (m.up) await tx.exec(m.up);
-      await tx.exec(`INSERT INTO ${MIGRATIONS_TABLE} (name) VALUES (?)`, [m.name]);
+      if (migration.up) await tx.exec(migration.up);
+      await tx.exec(`INSERT INTO ${MIGRATIONS_TABLE} (name) VALUES (?)`, [migration.name]);
     });
-    done.push(m.name);
+    done.push(migration.name);
   }
   return done;
 }
 
+/** Apply all pending migrations from a directory. */
+export async function migrate(db: Db, dir: string): Promise<string[]> {
+  return applyMigrations(db, loadMigrations(dir));
+}
+
 /** Roll back the most recently applied migration. Returns its name, or null. */
 export async function rollback(db: Db, dir: string): Promise<string | null> {
   const applied = await appliedMigrations(db);