Cd into /files if it exists

Author: martinRenou

src/web_worker_kernel.ts

@@ -22,6 +22,8 @@ interface IXeusKernel {
 
   cd(path: string): Promise<void>;
 
+  isDir(path: string): Promise<boolean>;
+
   processMessage(msg: any): Promise<void>;
 }
 
@@ -183,6 +185,11 @@ export class WebWorkerKernel implements IKernel {
 
     if (options.mountDrive) {
       await this._remote.mount(driveName, '/drive', PageConfig.getBaseUrl());
+    }
+
+    if (await this._remote.isDir('/files')) {
+      await this._remote.cd('/files');
+    } else if (options.mountDrive) {
       await this._remote.cd(localPath);
     }
   }

src/worker.ts

@@ -131,6 +131,15 @@ class XeusKernel {
     globalThis.Module.FS.chdir(path);
   }
 
+  isDir(path: string) {
+    try {
+      const lookup = globalThis.Module.FS.lookupPath(path);
+      return globalThis.Module.FS.isDir(lookup.node.mode);
+    } catch (e) {
+      return false;
+    }
+  }
+
   async processMessage(event: any): Promise<void> {
     const msg_type = event.msg.header.msg_type;