async resolveDebugConfiguration()

in src/legacyEdge/extension.ts [38:76]
28 lines of code
11 McCabe index (conditional complexity)

    async resolveDebugConfiguration(folder: vscode.WorkspaceFolder | undefined, config: vscode.DebugConfiguration, token?: vscode.CancellationToken): Promise<vscode.DebugConfiguration> {
        if (!isEdgeDebuggingSupported()) {
            const errorMessage = localize('edge.debug.error.versionNotSupported', 'Your version of Microsoft Edge does not support debugging via the Edge DevTools Protocol. You can read more about supported versions here (https://aka.ms/edp-docs).');
            return vscode.window.showErrorMessage(errorMessage).then(_ => {
                return undefined;
            });
        }

        // if launch.json is missing or empty
        if (!config.type && !config.request && !config.name) {
            // Return null so it will create a launch.json and fall back on provideDebugConfigurations - better to point the user towards the config
            // than try to work automagically.
            return null;
        }

        if (config.request === 'attach') {
            const discovery = new Core.chromeTargetDiscoveryStrategy.ChromeTargetDiscovery(
                new Core.NullLogger(), new Core.telemetry.NullTelemetryReporter());

            let targets;
            try {
                targets = await discovery.getAllTargets(config.address || '127.0.0.1', config.port, targetFilter, config.url);
            } catch (e) {
                // Target not running?
            }

            if (targets && targets.length > 1) {
                const selectedTarget = await pickTarget(targets);
                if (!selectedTarget) {
                    // Quickpick canceled, bail
                    return null;
                }

                config.websocketUrl = selectedTarget.websocketDebuggerUrl;
            }
        }

        return config;
    }