[vscode] fix #5756: unzip node_modules for built-in extensions

Signed-off-by: Anton Kosyakov <anton.kosyakov@typefox.io>

CHANGELOG.md

@@ -6,6 +6,7 @@
 - [security] Bump lodash.mergewith from 4.6.1 to 4.6.2
 - [plugin] Fixed `Converting circular structure to JSON` Error [#5661](https://github.com/theia-ide/theia/pull/5661)
 - [plugin] fixed auto detection of new languages [#5753](https://github.com/theia-ide/theia/issues/5753)
+- [vscode] unzip node_modules for built-in extensions [#5756](https://github.com/theia-ide/theia/pull/5756)
 
 Breaking changes:
 

packages/plugin-ext-vscode/src/node/plugin-vscode-file-handler.ts

@@ -16,6 +16,7 @@
 
 import { PluginDeployerFileHandler, PluginDeployerEntry, PluginDeployerFileHandlerContext } from '@theia/plugin-ext';
 import { injectable } from 'inversify';
+import * as fs from 'fs-extra';
 import * as path from 'path';
 import { getTempDir } from '@theia/plugin-ext';
 
@@ -41,6 +42,13 @@ export class PluginVsCodeFileHandler implements PluginDeployerFileHandler {
 
         const unpackedPath = path.resolve(this.unpackedFolder, path.basename(context.pluginEntry().path()));
         await context.unzip(context.pluginEntry().path(), unpackedPath);
+        if (context.pluginEntry().path().endsWith('.tgz')) {
+            const extensionPath = path.join(unpackedPath, 'package');
+            const vscodeNodeModulesPath = path.join(extensionPath, 'vscode_node_modules.zip');
+            if (await fs.pathExists(vscodeNodeModulesPath)) {
+                await context.unzip(vscodeNodeModulesPath, path.join(extensionPath, 'node_modules'));
+            }
+        }
 
         context.pluginEntry().updatePath(unpackedPath);
         return Promise.resolve();