spiderable_client.js

// We want to provide a deteriministic indicator of when the page is 'done'
// This is non-trivial: e.g. an infinite stream of tweets is never done.
//
// We do this instead:
//   We are done sometime after all initial subscriptions are ready
//   Initial subscriptions are those started in the top-level script execution,
//   or from a Meteor.startup callback when Meteor.startup is called in
//   top-level script execution.
//
// Note that we don't guarantee that we won't wait longer than we have to;
// extra subscriptions may be made, and extra data past the minimum may be
// received.
//
// We set this 'started' flag as Package.spiderable.Spiderable._initialSubscriptionsStarted
// This is used by our phantomjs to determine when the subscriptions are started;
// it then polls until all subscriptions are ready.

Spiderable._initialSubscriptionsStarted = false;

var startupCallbacksDone = function () {
  Spiderable._initialSubscriptionsStarted = true;
};

// This extra indirection is how we get called last
var topLevelCodeDone = function () {
  // We'd like to use Meteor.startup here I think, but docs/behaviour of that is wrong
  Meteor._setImmediate(function () { startupCallbacksDone(); });
};

Meteor.startup(function () { topLevelCodeDone(); });