Register linter commands (microsoft#653)

* register linter commands * do not wait to validate python installation

Author: DonJayamanne

src/client/extension.ts

@@ -34,6 +34,7 @@ import { ServiceManager } from './ioc/serviceManager';
 import { IServiceContainer } from './ioc/types';
 import { JupyterProvider } from './jupyter/provider';
 import { JediFactory } from './languageServices/jediProxyFactory';
+import { LinterCommands } from './linters/linterCommands';
 import { registerTypes as lintersRegisterTypes } from './linters/serviceRegistry';
 import { PythonCompletionItemProvider } from './providers/completionProvider';
 import { PythonDefinitionProvider } from './providers/definitionProvider';
@@ -102,7 +103,8 @@ export async function activate(context: vscode.ExtensionContext) {
  const interpreterManager = serviceContainer.get<IInterpreterService>(IInterpreterService);
 
  const pythonInstaller = new PythonInstaller(serviceContainer);
- await pythonInstaller.checkPythonInstallation(PythonSettings.getInstance());
+ pythonInstaller.checkPythonInstallation(PythonSettings.getInstance())
+ .catch(ex => console.error('Python Extension: pythonInstaller.checkPythonInstallation', ex));
 
  // This must be completed before we can continue.
  await interpreterManager.autoSetInterpreter();
@@ -120,6 +122,7 @@ export async function activate(context: vscode.ExtensionContext) {
 
  context.subscriptions.push(new ReplProvider(serviceContainer));
  context.subscriptions.push(new TerminalProvider(serviceContainer));
+ context.subscriptions.push(new LinterCommands(serviceContainer));
 
  // Enable indentAction
  // tslint:disable-next-line:no-non-null-assertion