Add build assertion against {{outlet named}}

Named outlets are effectively removed in Ember 4.0, as the render hook
and `renderTemplate` method which are used to configure them have been
removed. Add an assertion to catch anyone trying to use this API going
forward.

packages/@ember/-internals/glimmer/tests/integration/outlet-test.js

@@ -131,144 +131,6 @@ moduleFor(
       this.assertText('HIBYE');
     }
 
-    ['@test should support an optional name']() {
-      this.registerTemplate('application', '<h1>HI</h1>{{outlet "special"}}');
-      let outletState = {
-        render: {
-          owner: this.owner,
-          into: undefined,
-          outlet: 'main',
-          name: 'application',
-          controller: {},
-          template: this.owner.lookup('template:application')(this.owner),
-        },
-        outlets: Object.create(null),
-      };
-
-      runTask(() => this.component.setOutletState(outletState));
-
-      runAppend(this.component);
-
-      this.assertText('HI');
-
-      this.assertStableRerender();
-
-      this.registerTemplate('special', '<p>BYE</p>');
-      outletState.outlets.special = {
-        render: {
-          owner: this.owner,
-          into: undefined,
-          outlet: 'main',
-          name: 'special',
-          controller: {},
-          template: this.owner.lookup('template:special')(this.owner),
-        },
-        outlets: Object.create(null),
-      };
-
-      runTask(() => this.component.setOutletState(outletState));
-
-      this.assertText('HIBYE');
-    }
-
-    ['@test does not default outlet name when positional argument is present']() {
-      this.registerTemplate('application', '<h1>HI</h1>{{outlet this.someUndefinedThing}}');
-      let outletState = {
-        render: {
-          owner: this.owner,
-          into: undefined,
-          outlet: 'main',
-          name: 'application',
-          controller: {},
-          template: this.owner.lookup('template:application')(this.owner),
-        },
-        outlets: Object.create(null),
-      };
-
-      runTask(() => this.component.setOutletState(outletState));
-
-      runAppend(this.component);
-
-      this.assertText('HI');
-
-      this.assertStableRerender();
-
-      this.registerTemplate('special', '<p>BYE</p>');
-      outletState.outlets.main = {
-        render: {
-          owner: this.owner,
-          into: undefined,
-          outlet: 'main',
-          name: 'special',
-          controller: {},
-          template: this.owner.lookup('template:special')(this.owner),
-        },
-        outlets: Object.create(null),
-      };
-
-      runTask(() => this.component.setOutletState(outletState));
-
-      this.assertText('HI');
-    }
-
-    ['@test should support bound outlet name']() {
-      let controller = { outletName: 'foo' };
-      this.registerTemplate('application', '<h1>HI</h1>{{outlet this.outletName}}');
-      let outletState = {
-        render: {
-          owner: this.owner,
-          into: undefined,
-          outlet: 'main',
-          name: 'application',
-          controller,
-          template: this.owner.lookup('template:application')(this.owner),
-        },
-        outlets: Object.create(null),
-      };
-
-      runTask(() => this.component.setOutletState(outletState));
-
-      runAppend(this.component);
-
-      this.assertText('HI');
-
-      this.assertStableRerender();
-
-      this.registerTemplate('foo', '<p>FOO</p>');
-      outletState.outlets.foo = {
-        render: {
-          owner: this.owner,
-          into: undefined,
-          outlet: 'main',
-          name: 'foo',
-          controller: {},
-          template: this.owner.lookup('template:foo')(this.owner),
-        },
-        outlets: Object.create(null),
-      };
-
-      this.registerTemplate('bar', '<p>BAR</p>');
-      outletState.outlets.bar = {
-        render: {
-          owner: this.owner,
-          into: undefined,
-          outlet: 'main',
-          name: 'bar',
-          controller: {},
-          template: this.owner.lookup('template:bar')(this.owner),
-        },
-        outlets: Object.create(null),
-      };
-
-      runTask(() => this.component.setOutletState(outletState));
-
-      this.assertText('HIFOO');
-
-      runTask(() => set(controller, 'outletName', 'bar'));
-
-      this.assertText('HIBAR');
-    }
-
     ['@test outletState can pass through user code (liquid-fire initimate API) ']() {
       this.registerTemplate(
         'outer',

packages/ember-template-compiler/lib/plugins/assert-against-named-outlets.ts

@@ -0,0 +1,33 @@
+import { assert } from '@ember/debug';
+import { AST, ASTPlugin } from '@glimmer/syntax';
+import calculateLocationDisplay from '../system/calculate-location-display';
+import { EmberASTPluginEnvironment } from '../types';
+
+/**
+ @module ember
+*/
+
+/**
+  Prevents usage of named outlets, a legacy concept in Ember removed in 4.0.
+
+  @private
+  @class AssertAgainstNamedOutlets
+*/
+export default function assertAgainstNamedOutlets(env: EmberASTPluginEnvironment): ASTPlugin {
+  let moduleName = env.meta?.moduleName;
+
+  return {
+    name: 'assert-against-named-outlets',
+
+    visitor: {
+      MustacheStatement(node: AST.MustacheStatement) {
+        if (node.path.type === 'PathExpression' && node.path.original === 'outlet' && node.params[0]) {
+          let sourceInformation = calculateLocationDisplay(moduleName, node.loc);
+          assert(
+            `Named outlets were removed in Ember 4.0. See https://deprecations.emberjs.com/v3.x#toc_route-render-template for guidance on alternative APIs for named outlet use cases. ${sourceInformation}`
+          );
+        }
+      },
+    },
+  };
+}

packages/ember-template-compiler/lib/plugins/index.ts

@@ -1,5 +1,6 @@
 import AssertAgainstDynamicHelpersModifiers from './assert-against-dynamic-helpers-modifiers';
 import AssertAgainstNamedBlocks from './assert-against-named-blocks';
+import AssertAgainstNamedOutlets from './assert-against-named-outlets';
 import AssertInputHelperWithoutBlock from './assert-input-helper-without-block';
 import AssertReservedNamedArguments from './assert-reserved-named-arguments';
 import AssertSplattributeExpressions from './assert-splattribute-expression';
@@ -30,6 +31,7 @@ export const RESOLUTION_MODE_TRANSFORMS = Object.freeze(
     TransformInElement,
     AssertSplattributeExpressions,
     TransformEachTrackArray,
+    AssertAgainstNamedOutlets,
     TransformWrapMountAndOutlet,
     !EMBER_NAMED_BLOCKS ? AssertAgainstNamedBlocks : null,
     EMBER_DYNAMIC_HELPERS_AND_MODIFIERS
@@ -47,6 +49,7 @@ export const STRICT_MODE_TRANSFORMS = Object.freeze(
     TransformInElement,
     AssertSplattributeExpressions,
     TransformEachTrackArray,
+    AssertAgainstNamedOutlets,
     TransformWrapMountAndOutlet,
     !EMBER_NAMED_BLOCKS ? AssertAgainstNamedBlocks : null,
     !EMBER_DYNAMIC_HELPERS_AND_MODIFIERS ? AssertAgainstDynamicHelpersModifiers : null,

packages/ember-template-compiler/tests/plugins/assert-against-named-outlets-test.js

@@ -0,0 +1,26 @@
+import { compile } from '../../index';
+import { moduleFor, AbstractTestCase } from 'internal-test-helpers';
+
+moduleFor(
+  'ember-template-compiler: assert-against-named-outlets',
+  class extends AbstractTestCase {
+    [`named outlets are asserted against`]() {
+      expectAssertion(() => {
+        compile(`{{outlet 'foo'}}`, {
+          moduleName: 'baz/foo-bar',
+        });
+      }, `Named outlets were removed in Ember 4.0. See https://deprecations.emberjs.com/v3.x#toc_route-render-template for guidance on alternative APIs for named outlet use cases. ('baz/foo-bar' @ L1:C5) `);
+
+      expectAssertion(() => {
+        compile(`{{outlet foo}}`, {
+          moduleName: 'baz/foo-bar',
+        });
+      }, `Named outlets were removed in Ember 4.0. See https://deprecations.emberjs.com/v3.x#toc_route-render-template for guidance on alternative APIs for named outlet use cases. ('baz/foo-bar' @ L1:C5) `);
+
+      // No assertion
+      compile(`{{outlet}}`, {
+        moduleName: 'baz/foo-bar',
+      });
+    }
+  }
+);