Allow installation of VS Code extension packs

Fixes #6611

- added `extensionPack` property to `PluginPackage` interface.
- when getting dependencies, ensure that `extensionPack` dependencies
are also loaded. Extensions packs can now be unloaded and their bundled
extensions installed.

Signed-off-by: Vincent Fugnitto <vincent.fugnitto@ericsson.com>

packages/plugin-ext-vscode/src/node/scanner-vscode.ts

@@ -52,11 +52,23 @@ export class VsCodePluginScanner extends TheiaPluginScanner implements PluginSca
      * Maps extension dependencies to deployable extension dependencies.
      */
     getDependencies(plugin: PluginPackage): Map<string, string> | undefined {
-        if (!plugin.extensionDependencies || !plugin.extensionDependencies.length) {
+        // Store the list of dependencies.
+        const dependencies = new Map<string, string>();
+        // Store the list of available dependencies (`extensionDependencies` and `extensionPack`).
+        const deps: string[] = [];
+        // Add the list of `extensionDependencies` if available.
+        if (plugin.extensionDependencies && plugin.extensionDependencies.length) {
+            deps.push(...plugin.extensionDependencies);
+        }
+        // Add the list of `extensionPack` if available.
+        if (plugin.extensionPack && plugin.extensionPack.length) {
+            deps.push(...plugin.extensionPack);
+        }
+        // Exit early if no dependencies are present.
+        if (!deps.length) {
             return undefined;
         }
-        const dependencies = new Map<string, string>();
-        for (const dependency of plugin.extensionDependencies) {
+        for (const dependency of deps) {
             const dependencyId = dependency.toLowerCase();
             dependencies.set(dependencyId, this.VSCODE_PREFIX + dependencyId);
         }

packages/plugin-ext/src/common/plugin-protocol.ts

@@ -53,6 +53,7 @@ export interface PluginPackage {
     packagePath: string;
     activationEvents?: string[];
     extensionDependencies?: string[];
+    extensionPack?: string[];
 }
 export namespace PluginPackage {
     export function toPluginUrl(pck: PluginPackage, relativePath: string): string {