Move template compiler creation to a method on the addon

lib/ember-addon-main.js

@@ -56,6 +56,11 @@ module.exports = {
     return this._cachedShouldColocateTemplates;
   },
 
+  getTemplateCompiler(inputTree, htmlbarsOptions) {
+    const TemplateCompiler = require('./template-compiler-plugin');
+    return new TemplateCompiler(inputTree, htmlbarsOptions);
+  },
+
   setupPreprocessorRegistry(type, registry) {
     // ensure that broccoli-ember-hbs-template-compiler is not processing hbs files
     registry.remove('template', 'broccoli-ember-hbs-template-compiler');
@@ -82,9 +87,7 @@ module.exports = {
 
           inputTree = debugTree(new ColocatedTemplateProcessor(inputTree), '02-colocated-output');
         }
-
-        const TemplateCompiler = require('./template-compiler-plugin');
-        return debugTree(new TemplateCompiler(inputTree, htmlbarsOptions), '03-output');
+        return debugTree(this._addon.getTemplateCompiler(inputTree, htmlbarsOptions), '03-output');
       },
 
       precompile(string, options) {

lib/template-compiler-plugin.d.ts

@@ -0,0 +1,17 @@
+import type Plugin from "broccoli-plugin";
+import type { ASTPluginBuilder } from "@glimmer/syntax";
+import type { InputNode } from "broccoli-node-api";
+type PluginOptions = ConstructorParameters<typeof Plugin>[1]; // this should be exported by the main import.
+declare namespace TemplateCompiler {
+  interface HtmlBarsOptions extends PluginOptions {
+    plugins?: {
+      ast?: Array<ASTPluginBuilder>
+    };
+  }
+}
+declare class TemplateCompiler extends Plugin {
+  public extensions: Array<string>;
+  public targetExtension: string;
+  constructor(inputTree: InputNode, options: TemplateCompiler.HtmlBarsOptions);
+}
+export = TemplateCompiler;