let windowMediator = Cc["@mozilla.org/appshell/window-mediator;1"]
                     .getService(Ci.nsIWindowMediator);

Cu.import("resource://gre/modules/devtools/gcli.jsm", {});
let { CommandUtils } = Cu.import("resource:///modules/devtools/DeveloperToolbar.jsm", {});
let { require } = Cu.import("resource://gre/modules/devtools/Require.jsm", {});
let { Requisition } = require("gcli/cli");
let { Promise: { defer } } = Cu.import("resource://gre/modules/commonjs/sdk/core/promise.js", {});

let gcliExec = (command) => {
  let chromeWindow = command.chromeWindow ||
                     windowMediator.getMostRecentWindow("navigator:browser");
  let contentWindow = command.contentWindow ||
                      chromeWindow.gBrowser.selectedTab.linkedBrowser.contentWindow;

  let environment = CommandUtils.createEnvironment(chromeWindow.document,
                                                   contentWindow.document);

  let requisition = new Requisition(environment);
  let output = requisition.exec(command);
  return output.promise.then(function() {
    return output.data
  }, function() {
    throw Error(output.data)
  })
}

gcliExec({
  command: "tilt toggle",
  args: {}
})