gistfile1.txt

XPCOMUtils.defineLazyGetter(this, "require", function() {
  let { require } = Cu.import("resource://gre/modules/devtools/Require.jsm", {});
  Cu.import("resource://gre/modules/devtools/gcli.jsm", {});
  return require;
});

XPCOMUtils.defineLazyGetter(this, "Requisition", () => require("gcli/cli").Requisition);

function execGcliCommand(command) {
  let windowMediator = Cc["@mozilla.org/appshell/window-mediator;1"]
                        .getService(Ci.nsIWindowMediator);
  let chromeWindow = windowMediator.getMostRecentWindow("navigator:browser");
  let contentWindow = chromeWindow.gBrowser.selectedTab.linkedBrowser.contentWindow;
  
  let environment = CommandUtils.createEnvironment(chromeWindow.document,
                                                   contentWindow.document);

  // cache this
  let requisition = new Requisition(environment);
  requisition.updateExec(command).then(output => {
    return output.promise.then(() => {
      this.connection.send({
        from: this.actorID,
        requestId: request.requestId,
        data: output.data,
        type: output.type,
        error: output.error
      });
    });
  }).then(null, console.error);
}