Add migrate check script

packages/core/src/scripts/migrate/check.ts

@@ -0,0 +1,21 @@
+import { runMigrateWithDbUrl, withMigrate } from '../../lib/migrations';
+import { loadBuiltConfig } from '../../lib/config/loadConfig';
+import { ExitError } from '../utils';
+import { getSchemaPaths } from '../../artifacts';
+
+export async function checkMigrations(cwd: string) {
+  const config = loadBuiltConfig(cwd);
+  await withMigrate(getSchemaPaths(cwd).prisma, async migrate => {
+    const evaluateDataLossResult = await runMigrateWithDbUrl(
+      config.db.url,
+      config.db.shadowDatabaseUrl,
+      () => migrate.evaluateDataLoss()
+    );
+    if (evaluateDataLossResult.migrationSteps) {
+      console.log('Migrations are out of date - run `keystone migrate generate` to update them');
+      throw new ExitError(1);
+    } else {
+      console.log('✅ Migrations are up to date');
+    }
+  });
+}

packages/core/src/scripts/migrate/index.ts

@@ -1,5 +1,6 @@
 import { ExitError } from '../utils';
 import { applyMigrations } from './apply';
+import { checkMigrations } from './check';
 import { generateMigrations } from './generate';
 
 export async function migrate(cwd: string, input: string[], shouldDropDatabase: boolean) {
@@ -9,6 +10,8 @@ export async function migrate(cwd: string, input: string[], shouldDropDatabase:
       return generateMigrations(cwd, shouldDropDatabase);
     case 'apply':
       return applyMigrations(cwd);
+    case 'check':
+      return checkMigrations(cwd);
     default:
       console.log(`${migrateCommand} is not a migrate command that keystone accepts`);
       throw new ExitError(1);