Cleanup and progress

server/syscalls/shell.ts

@@ -0,0 +1,15 @@
+import { promisify } from "util";
+import { execFile } from "child_process";
+
+const execFilePromise = promisify(execFile);
+
+export default function (cwd: string) {
+  return {
+    "shell.run": async (cmd: string, args: string[]) => {
+      let { stdout, stderr } = await execFilePromise(cmd, args, {
+        cwd: cwd,
+      });
+      return { stdout, stderr };
+    },
+  };
+}