xrsh-buildroot/buildroot-v86/board/v86/rootfs_overlay/root/bin/save

#!/bin/sh
source /etc/profile.sh

state(){
  javascript='
    const isoterminal = document.querySelector("[isoterminal]").components.isoterminal.term
    isoterminal.save()
    return "[OK] xrsh state saved\n"
  '
  
  echo "[i] triggering ~/hook.d/save/* scripts"
  hook save
  echo "[i] warning: do not resize the browserwindow"
  echo "[i] please wait.."
  js "$javascript"
  exit
}

file(){
  javascript='

    filename="'$(pwd)/$1'"
    res = ""

    function saveUint8Array(uint8Array, filename = "download.bin", mimeType = "application/octet-stream") {
      if( !uint8Array ){ 
        console.log( res = "file not found" )
        return false
      }
      const blob = new Blob([uint8Array], { type: mimeType });
      const url = URL.createObjectURL(blob);

      const a = document.createElement("a");
      a.href = url;
      a.download = filename.replace(/.*\//,"");

      // Programmatically trigger the click event
      document.body.appendChild(a);
      a.click();
      document.body.removeChild(a);

      // Clean up the URL object
      URL.revokeObjectURL(url);
    }

    let term = document.querySelector("[isoterminal]")
    term.emit("read_file", [filename, (str,buf) => saveUint8Array(buf, filename) ] )
  
    return res
  '
  hook save
  js "$javascript"
  exit
}

test -z "$1" && state
test -n "$1" && file "$1"
echo "Usage: save [file]      # pass no argument to save VM state to localStorage"