chore: Fix hot reload for nodes-langchain package (no-changelog) (#17111)

packages/@n8n/nodes-langchain/scripts/post-build.js

@@ -0,0 +1,23 @@
+/**
+ * Post-build script
+ *
+ * This is a separate script instead of inline npm commands because using "&&"" to chain commands in --onSuccess can cause the watch mode to hang
+ */
+
+const { execSync } = require('child_process');
+
+function runCommand(command) {
+	try {
+		execSync(command, { stdio: 'inherit' });
+	} catch (error) {
+		console.error(`Command failed: ${command}`);
+		process.exit(1);
+	}
+}
+
+// Run all post-build tasks
+runCommand('npx tsc-alias -p tsconfig.build.json');
+runCommand('node scripts/copy-tokenizer-json.js .');
+runCommand('node ../../nodes-base/scripts/copy-nodes-json.js .');
+runCommand('pnpm n8n-copy-static-files');
+runCommand('pnpm n8n-generate-metadata');