Add support for earlier embers

Author: NullVoxPopuli

.try.mjs

@@ -26,10 +26,24 @@ const compatDeps = {
 export default {
   scenarios: [
     {
-      name: 'ember-lts-5.8',
+      name: 'ember-lts-3.28',
       npm: {
         devDependencies: {
-          'ember-source': '~5.8.0',
+          'ember-source': '~3.28.0',
+          'ember-cli': '^4.12',
+          ...compatDeps,
+        },
+      },
+      env: {
+        ENABLE_COMPAT_BUILD: true,
+      },
+      files: compatFiles,
+    },
+    {
+      name: 'ember-lts-4.12',
+      npm: {
+        devDependencies: {
+          'ember-source': '~4.12.0',
           ...compatDeps,
         },
       },
@@ -59,6 +73,22 @@ export default {
         },
       },
     },
+    {
+      name: 'ember-lts-6.8',
+      npm: {
+        devDependencies: {
+          'ember-source': 'npm:ember-source@~6.8.0',
+        },
+      },
+    },
+    {
+      name: 'ember-lts-6.12',
+      npm: {
+        devDependencies: {
+          'ember-source': 'npm:ember-source@~6.12.0',
+        },
+      },
+    },
     {
       name: 'ember-latest',
       npm: {

src/modifiers/did-update.ts

@@ -1,5 +1,32 @@
 import { setModifierManager, capabilities } from '@ember/modifier';
-import { untrack } from '@glimmer/validator';
+import {
+  macroCondition,
+  dependencySatisfies,
+  importSync,
+} from '@embroider/macros';
+
+// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+const untrack: (fn: () => void) => void = (function () {
+  if (macroCondition(dependencySatisfies('ember-source', '> 3.27.0-beta.1'))) {
+    // ember-source@3.27 shipped "real modules" by default, so we can just use
+    // importSync to get @glimmer/validator directly
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-explicit-any
+    const module = importSync('@glimmer/validator') as any;
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+    return module.untrack as unknown as (fn: () => void) => void;
+  } else if (
+    macroCondition(dependencySatisfies('ember-source', '>= 3.22.0-alpha.1'))
+  ) {
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-explicit-any
+    const module = importSync('ember') as any;
+    // we can access `window.Ember` here because it wasn't deprecated until at least 3.27
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-return, @typescript-eslint/no-unsafe-call, @typescript-eslint/no-unsafe-member-access
+    return module.__loader.require('@glimmer/validator').untrack;
+  } else {
+    // we do not call `untrack` when ember-source < 3.22
+    // (we don't suport ember-source < 3.22)
+  }
+})();
 
 import type {
   ModifierArgs,