Start Discourse in an initializer (#9930)

* DEV: To be pedantic, there is more than EMBER in there now

* DEV: Use less globals. Have `Discourse` start in an initializer

* DEV: Remove another global

app/assets/javascripts/discourse-loader.js

@@ -1,7 +1,7 @@
 var define, requirejs;
 
 (function() {
-  var EMBER_MODULES = {};
+  var JS_MODULES = {};
   var ALIASES = {
     "ember-addons/ember-computed-decorators":
       "discourse-common/utils/decorators",
@@ -11,7 +11,7 @@ var define, requirejs;
 
   // In future versions of ember we don't need this
   if (typeof Ember !== "undefined") {
-    EMBER_MODULES = {
+    JS_MODULES = {
       jquery: { default: $ },
       "@ember/array": {
         default: Ember.Array,
@@ -285,7 +285,7 @@ var define, requirejs;
       name = "@ember/object";
     }
 
-    var mod = EMBER_MODULES[name] || registry[name];
+    var mod = JS_MODULES[name] || registry[name];
     if (!mod) {
       throw new Error(
         "Could not find module `" + name + "` imported from `" + origin + "`"
@@ -308,8 +308,8 @@ var define, requirejs;
 
   requirejs = require = function(name) {
     name = transformForAliases(name);
-    if (EMBER_MODULES[name]) {
-      return EMBER_MODULES[name];
+    if (JS_MODULES[name]) {
+      return JS_MODULES[name];
     }
 
     var mod = registry[name];

app/assets/javascripts/discourse/app/pre-initializers/discourse-bootstrap.js

@@ -0,0 +1,94 @@
+import PreloadStore from "discourse/lib/preload-store";
+import I18n from "I18n";
+import Session from "discourse/models/session";
+import RSVP from "rsvp";
+import { isTesting } from "discourse-common/config/environment";
+
+export default {
+  name: "discourse-bootstrap",
+
+  // The very first initializer to run
+  initialize(container, app) {
+    // Our test environment has its own bootstrap code
+    if (isTesting()) {
+      return;
+    }
+    const preloadedDataElement = document.getElementById("data-preloaded");
+    const setupData = document.getElementById("data-discourse-setup").dataset;
+
+    if (preloadedDataElement) {
+      const preloaded = JSON.parse(preloadedDataElement.dataset.preloaded);
+
+      Object.keys(preloaded).forEach(function(key) {
+        PreloadStore.store(key, JSON.parse(preloaded[key]));
+
+        if (setupData.debugPreloadedAppData === "true") {
+          /* eslint-disable no-console */
+          console.log(key, PreloadStore.get(key));
+          /* eslint-enable no-console */
+        }
+      });
+    }
+
+    app.CDN = setupData.cdn;
+    app.BaseUrl = setupData.baseUrl;
+    app.BaseUri = setupData.baseUri;
+    app.Environment = setupData.environment;
+    app.SiteSettings = PreloadStore.get("siteSettings");
+    app.ThemeSettings = PreloadStore.get("themeSettings");
+    app.LetterAvatarVersion = setupData.letterAvatarVersion;
+    app.MarkdownItURL = setupData.markdownItUrl;
+    app.ServiceWorkerURL = setupData.serviceWorkerUrl;
+    I18n.defaultLocale = setupData.defaultLocale;
+
+    window.Logster = window.Logster || {};
+    window.Logster.enabled = setupData.enableJsErrorReporting === "true";
+
+    app.set("assetVersion", setupData.assetVersion);
+
+    Session.currentProp(
+      "disableCustomCSS",
+      setupData.disableCustomCss === "true"
+    );
+
+    if (setupData.safeMode) {
+      Session.currentProp("safe_mode", setupData.safeMode);
+    }
+
+    app.HighlightJSPath = setupData.highlightJsPath;
+    app.SvgSpritePath = setupData.svgSpritePath;
+
+    if (app.Environment === "development") {
+      app.SvgIconList = setupData.svgIconList;
+    }
+
+    if (setupData.s3BaseUrl) {
+      app.S3CDN = setupData.s3Cdn;
+      app.S3BaseUrl = setupData.s3BaseUrl;
+    }
+
+    RSVP.configure("onerror", function(e) {
+      // Ignore TransitionAborted exceptions that bubble up
+      if (e && e.message === "TransitionAborted") {
+        return;
+      }
+
+      if (Discourse.Environment === "development") {
+        /* eslint-disable no-console  */
+        if (e) {
+          if (e.message || e.stack) {
+            console.log(e.message);
+            console.log(e.stack);
+          } else {
+            console.log("Uncaught promise: ", e);
+          }
+        } else {
+          console.log("A promise failed but was not caught.");
+        }
+        /* eslint-enable no-console  */
+      }
+
+      window.onerror(e && e.message, null, null, null, e);
+    });
+  }
+};

app/assets/javascripts/discourse/app/pre-initializers/inject-discourse-objects.js

@@ -15,6 +15,7 @@ const ALL_TARGETS = ["controller", "component", "route", "model", "adapter"];
 
 export default {
   name: "inject-discourse-objects",
+  after: "discourse-bootstrap",
 
   initialize(container, app) {
     ALL_TARGETS.forEach(t => app.inject(t, "appEvents", "service:app-events"));

app/assets/javascripts/discourse/app/widgets/post-stream.js

@@ -3,6 +3,7 @@ import { createWidget } from "discourse/widgets/widget";
 import transformPost from "discourse/lib/transform-post";
 import { Placeholder } from "discourse/lib/posts-with-placeholders";
 import { addWidgetCleanCallback } from "discourse/components/mount-widget";
+import { isTesting } from "discourse-common/config/environment";
 
 let transformCallbacks = null;
 export function postTransformCallbacks(transformed) {
@@ -19,7 +20,7 @@ export function addPostTransformCallback(callback) {
   transformCallbacks.push(callback);
 }
 
-const CLOAKING_ENABLED = !window.inTestEnv;
+const CLOAKING_ENABLED = !isTesting();
 const DAY = 1000 * 60 * 60 * 24;
 
 const _dontCloak = {};

app/assets/javascripts/preload-application-data.js

@@ -1,84 +0,0 @@
-// discourse-skip-module
-(function() {
-  const ps = require("discourse/lib/preload-store").default;
-  const preloadedDataElement = document.getElementById("data-preloaded");
-  const setupData = document.getElementById("data-discourse-setup").dataset;
-  const I18n = require("I18n").default;
-
-  if (preloadedDataElement) {
-    const preloaded = JSON.parse(preloadedDataElement.dataset.preloaded);
-
-    Object.keys(preloaded).forEach(function(key) {
-      ps.store(key, JSON.parse(preloaded[key]));
-
-      if (setupData.debugPreloadedAppData === "true") {
-        /* eslint-disable no-console */
-        console.log(key, ps.get(key));
-        /* eslint-enable no-console */
-      }
-    });
-  }
-
-  window.Logster = window.Logster || {};
-  window.Logster.enabled = setupData.enableJsErrorReporting === "true";
-
-  Discourse.CDN = setupData.cdn;
-  Discourse.BaseUrl = setupData.baseUrl;
-  Discourse.BaseUri = setupData.baseUri;
-  Discourse.Environment = setupData.environment;
-  Discourse.SiteSettings = ps.get("siteSettings");
-  Discourse.ThemeSettings = ps.get("themeSettings");
-  Discourse.LetterAvatarVersion = setupData.letterAvatarVersion;
-  Discourse.MarkdownItURL = setupData.markdownItUrl;
-  Discourse.ServiceWorkerURL = setupData.serviceWorkerUrl;
-  I18n.defaultLocale = setupData.defaultLocale;
-  Discourse.start();
-  Discourse.set("assetVersion", setupData.assetVersion);
-
-  const Session = require("discourse/models/session").default;
-  Session.currentProp(
-    "disableCustomCSS",
-    setupData.disableCustomCss === "true"
-  );
-
-  if (setupData.safeMode) {
-    Session.currentProp("safe_mode", setupData.safeMode);
-  }
-
-  Discourse.HighlightJSPath = setupData.highlightJsPath;
-  Discourse.SvgSpritePath = setupData.svgSpritePath;
-
-  if (Discourse.Environment === "development") {
-    Discourse.SvgIconList = setupData.svgIconList;
-  }
-
-  if (setupData.s3BaseUrl) {
-    Discourse.S3CDN = setupData.s3Cdn;
-    Discourse.S3BaseUrl = setupData.s3BaseUrl;
-  }
-
-  // eslint-disable-next-line
-  Ember.RSVP.configure("onerror", function(e) {
-    // Ignore TransitionAborted exceptions that bubble up
-    if (e && e.message === "TransitionAborted") {
-      return;
-    }
-
-    if (Discourse.Environment === "development") {
-      /* eslint-disable no-console  */
-      if (e) {
-        if (e.message || e.stack) {
-          console.log(e.message);
-          console.log(e.stack);
-        } else {
-          console.log("Uncaught promise: ", e);
-        }
-      } else {
-        console.log("A promise failed but was not caught.");
-      }
-      /* eslint-enable no-console  */
-    }
-
-    window.onerror(e && e.message, null, null, null, e);
-  });
-})();

app/assets/javascripts/start-discourse.js

@@ -0,0 +1,4 @@
+// discourse-skip-module
+(function() {
+  Discourse.start();
+})();

app/views/layouts/application.html.erb

@@ -109,7 +109,7 @@
     <% end %>
 
     <div class="hidden" id="data-preloaded" data-preloaded="<%= preloaded_json %>"></div>
-    <%= preload_script "preload-application-data" %>
+    <%= preload_script "start-discourse" %>
 
     <%= yield :data %>
 

config/application.rb

@@ -154,7 +154,7 @@ module Discourse
       service-worker.js
       google-tag-manager.js
       google-universal-analytics.js
-      preload-application-data.js
+      start-discourse.js
       print-page.js
       omniauth-complete.js
       activate-account.js

lib/discourse_js_processor.rb

@@ -48,7 +48,7 @@ class DiscourseJsProcessor
     return false if relative_path.start_with?("#{js_root}/plugins/")
 
     return true if %w(
-      preload-application-data
+      start-discourse
       wizard-start
       onpopstate-handler
       google-tag-manager

test/javascripts/test_helper.js

@@ -53,8 +53,6 @@ sinon.config = {
   useFakeServer: false
 };
 
-window.inTestEnv = true;
-
 let MessageBus = require("message-bus-client").default;
 
 // Stop the message bus so we don't get ajax calls