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

@@ -52,15 +52,20 @@ 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) {
-            return undefined;
-        }
+        // Store the list of dependencies.
         const dependencies = new Map<string, string>();
-        for (const dependency of plugin.extensionDependencies) {
-            const dependencyId = dependency.toLowerCase();
-            dependencies.set(dependencyId, this.VSCODE_PREFIX + dependencyId);
+        // Iterate through the list of dependencies from `extensionDependencies` and `extensionPack`.
+        for (const dependency of [plugin.extensionDependencies, plugin.extensionPack]) {
+            if (dependency !== undefined) {
+                // Iterate over the list of dependencies present, and add them to the collection.
+                dependency.forEach((dep: string) => {
+                    const dependencyId = dep.toLowerCase();
+                    dependencies.set(dependencyId, this.VSCODE_PREFIX + dependencyId);
+                });
+            }
         }
-        return dependencies;
+        // Return the map of dependencies if present, else `undefined`.
+        return dependencies.size > 0 ? dependencies : undefined ;
     }
 
     getLifecycle(plugin: PluginPackage): PluginLifecycle {

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 {