Automatically create 'launch.json'

Automatically creates the `launch.json` file when executing
the command `start debugging` whenever a `launch.json` does not
exist under `.theia` or `.vscode`. Once created, users are prompted
to select the type of debug configuration they desire.

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

packages/debug/src/browser/debug-frontend-application-contribution.ts

@@ -947,6 +947,11 @@ export class DebugFrontendApplicationContribution extends AbstractViewContributi
 
     async start(noDebug?: boolean): Promise<void> {
         let { current } = this.configurations;
+        // If no current configurations are present, create the `launch.json` and prompt users to select the config.
+        if (!current) {
+            await this.configurations.addConfiguration();
+            return;
+        }
         if (current) {
             if (noDebug !== undefined) {
                 current = {

packages/debug/src/browser/view/debug-configuration-widget.tsx

@@ -26,10 +26,15 @@ import { DebugSessionManager } from '../debug-session-manager';
 import { DebugAction } from './debug-action';
 import { DebugViewModel } from './debug-view-model';
 import { DebugSessionOptions } from '../debug-session-options';
+import { DebugCommands } from '../debug-frontend-application-contribution';
+import { CommandRegistry } from '@theia/core/lib/common';
 
 @injectable()
 export class DebugConfigurationWidget extends ReactWidget {
 
+    @inject(CommandRegistry)
+    protected readonly commandRegistry: CommandRegistry;
+
     @inject(DebugViewModel)
     protected readonly viewModel: DebugViewModel;
 
@@ -118,11 +123,7 @@ export class DebugConfigurationWidget extends ReactWidget {
 
     protected readonly start = () => {
         const configuration = this.manager.current;
-        if (configuration) {
-            this.sessionManager.start(configuration);
-        } else {
-            this.manager.addConfiguration();
-        }
+        this.commandRegistry.executeCommand(DebugCommands.START.id, configuration);
     }
 
     protected readonly openConfiguration = () => this.manager.openConfiguration();