Fix bundled extensions not being loaded (#7359)

* Fix bundled extensions not being loaded

- Also show that this fixes it by added an example bundled
  extension to 'open-lens'

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Fix build

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Add explanatory comment for inline require

Signed-off-by: Sebastian Malton <sebastian@malton.name>

---------

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/technical-features/application/legacy-extensions/src/bundled-extension.ts

@@ -0,0 +1,16 @@
+import { getInjectionToken } from "@ogre-tools/injectable";
+import type {
+  LensExtensionConstructor,
+  LensExtensionManifest,
+} from "./lens-extension";
+
+export interface BundledExtension {
+  readonly manifest: LensExtensionManifest;
+  main: () => LensExtensionConstructor | null;
+  renderer: () => LensExtensionConstructor | null;
+}
+
+export const bundledExtensionInjectionToken =
+  getInjectionToken<BundledExtension>({
+    id: "bundled-extension-path",
+  });

packages/technical-features/application/legacy-extensions/src/lens-extension.ts

@@ -0,0 +1,63 @@
+export type LensExtensionId = string;
+export type LensExtensionConstructor = new (
+  ext: InstalledExtension
+) => LegacyLensExtension;
+
+export interface InstalledExtension {
+  id: LensExtensionId;
+
+  readonly manifest: LensExtensionManifest;
+
+  // Absolute path to the non-symlinked source folder,
+  // e.g. "/Users/user/.k8slens/extensions/helloworld"
+  readonly absolutePath: string;
+
+  /**
+   * Absolute to the symlinked package.json file
+   */
+  readonly manifestPath: string;
+  readonly isBundled: boolean;
+  readonly isCompatible: boolean;
+  isEnabled: boolean;
+}
+
+export interface LegacyLensExtension {
+  readonly id: LensExtensionId;
+  readonly manifest: LensExtensionManifest;
+  readonly manifestPath: string;
+  readonly isBundled: boolean;
+  readonly sanitizedExtensionId: string;
+  readonly name: string;
+  readonly version: string;
+  readonly description: string | undefined;
+  readonly storeName: string;
+
+  getExtensionFileFolder(): Promise<string>;
+  enable(): Promise<void>;
+  disable(): Promise<void>;
+  activate(): Promise<void>;
+}
+
+export interface LensExtensionManifest {
+  name: string;
+  version: string;
+  description?: string;
+
+  main?: string; // path to %ext/dist/main.js
+  renderer?: string; // path to %ext/dist/renderer.js
+  /**
+   * Supported Lens version engine by extension could be defined in `manifest.engines.lens`
+   * Only MAJOR.MINOR version is taken in consideration.
+   */
+  engines: {
+    lens: string; // "semver"-package format
+    npm?: string;
+    node?: string;
+  };
+
+  /**
+   * Specify extension name used for persisting data.
+   * Useful if extension is renamed but the data should not be lost.
+   */
+  storeName?: string;
+}