[plugin] map dependencies to vscode builtins properly

Signed-off-by: Sven Efftinge <sven.efftinge@typefox.io>

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

@@ -28,6 +28,11 @@ export class VsCodePluginScanner extends TheiaPluginScanner implements PluginSca
     }
 
     getModel(plugin: PluginPackage): PluginModel {
+        // translate vscode builtins, as they are published with a prefix. See https://github.com/theia-ide/vscode-builtin-extensions/blob/master/src/republish.js#L50
+        const built_prefix = '@theia/vscode-builtin-';
+        if (plugin && plugin.name && plugin.name.startsWith(built_prefix)) {
+            plugin.name = plugin.name.substr(built_prefix.length);
+        }
         const result: PluginModel = {
             // see id definition: https://github.com/microsoft/vscode/blob/15916055fe0cb9411a5f36119b3b012458fe0a1d/src/vs/platform/extensions/common/extensions.ts#L167-L169
             id: `${plugin.publisher.toLowerCase()}.${plugin.name.toLowerCase()}`,