Merge pull request #1807 from microsoft/connor4312/wasm-14

feat: prompt to install extension on wasm step

package.json

@@ -125,6 +125,7 @@
     "@types/ws": "^8.5.3",
     "@typescript-eslint/eslint-plugin": "^5.17.0",
     "@typescript-eslint/parser": "^5.17.0",
+    "@vscode/dwarf-debugging": "^0.0.2",
     "@vscode/test-electron": "^2.2.3",
     "chai": "^4.3.6",
     "chai-as-promised": "^7.1.1",

src/adapter/dwarf/dwarfModuleProvider.ts

@@ -0,0 +1,18 @@
+/*---------------------------------------------------------
+ * Copyright (C) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------*/
+
+export const IDwarfModuleProvider = Symbol('IDwarfModuleProvider');
+
+export interface IDwarfModuleProvider {
+  /**
+   * Loads the dwarf module if it exists.
+   */
+  load(): Promise<typeof import('@vscode/dwarf-debugging') | undefined>;
+
+  /**
+   * Prompts the user to install the dwarf module (called if the module is
+   * not installed.)
+   */
+  prompt(): void;
+}

src/adapter/dwarf/dwarfModuleProviderImpl.ts

@@ -0,0 +1,40 @@
+/*---------------------------------------------------------
+ * Copyright (C) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------*/
+
+import type * as dwf from '@vscode/dwarf-debugging';
+import * as l10n from '@vscode/l10n';
+import { inject, injectable } from 'inversify';
+import Dap from '../../dap/api';
+import { IDapApi } from '../../dap/connection';
+import { IDwarfModuleProvider } from './dwarfModuleProvider';
+
+const name = '@vscode/dwarf-debugging';
+
+@injectable()
+export class DwarfModuleProvider implements IDwarfModuleProvider {
+  private didPrompt = false;
+
+  constructor(@inject(IDapApi) private readonly dap: Dap.Api) {}
+
+  public async load(): Promise<typeof dwf | undefined> {
+    try {
+      return await import(name);
+    } catch {
+      return undefined;
+    }
+  }
+
+  public prompt() {
+    if (!this.didPrompt) {
+      this.didPrompt = true;
+      this.dap.output({
+        output: l10n.t(
+          'You may install the `{}` module via npm for enhanced WebAssembly debugging',
+          name,
+        ),
+        category: 'console',
+      });
+    }
+  }
+}