Merge pull request 'Fix db:export ENOBUFS by streaming pg_dump output to file' (#17) from dev into main

Reviewed-on: #17

backend/src/db/export.ts

@@ -1,5 +1,5 @@
 import 'dotenv/config';
-import { existsSync, mkdirSync, writeFileSync } from 'fs';
+import { closeSync, existsSync, mkdirSync, openSync } from 'fs';
 import { dirname, resolve } from 'path';
 import { spawnSync } from 'child_process';
 import Database from 'better-sqlite3';
@@ -43,11 +43,13 @@ function exportSqlite(outputPath: string): void {
 
 function exportPostgres(outputPath: string): void {
   const connString = process.env.DATABASE_URL || 'postgresql://localhost:5432/spanglish';
+  const outFd = openSync(outputPath, 'w');
+  try {
     const result = spawnSync(
       'pg_dump',
       ['--clean', '--if-exists', connString],
       {
-      stdio: ['ignore', 'pipe', 'pipe'],
+        stdio: ['ignore', outFd, 'pipe'],
         encoding: 'utf-8',
       }
     );
@@ -63,8 +65,10 @@ function exportPostgres(outputPath: string): void {
       process.exit(1);
     }
 
-  writeFileSync(outputPath, result.stdout);
     console.log(`Exported to ${outputPath}`);
+  } finally {
+    closeSync(outFd);
+  }
 }
 
 async function main() {