单个数据库文件大于500兆时，裁剪文件，避免服务无法启动

back/loaders/db.ts

@@ -1,6 +1,7 @@
 import DataStore from 'nedb';
 import config from '../config';
 import Logger from './logger';
+import fs from 'fs';
 
 interface Dbs {
   cronDb: DataStore;
@@ -12,7 +13,28 @@ interface Dbs {
 
 const db: Dbs = {} as any;
 
-export default () => {
+async function truncateDb() {
+  return new Promise((resolve) => {
+    const files = [
+      config.cronDbFile,
+      config.dependenceDbFile,
+      config.envDbFile,
+      config.appDbFile,
+      config.authDbFile,
+    ];
+
+    for (const file of files) {
+      if (fs.statSync(file).size >= 1024 * 1024 * 500) {
+        fs.truncateSync(file, 1024 * 1024 * 500);
+      }
+    }
+    resolve(null);
+  });
+}
+export default async () => {
+  try {
+    await truncateDb();
+
     db.cronDb = new DataStore({ filename: config.cronDbFile });
     db.dependenceDb = new DataStore({ filename: config.dependenceDbFile });
     db.envDb = new DataStore({ filename: config.envDbFile });
@@ -43,6 +65,10 @@ export default () => {
     });
 
     Logger.info('✌️ DB loaded');
+  } catch (error) {
+    Logger.info('✌️ DB load failed');
+    Logger.info(error);
+  }
 };
 
 export const dbs: Dbs = db;