Show user deprecated message for unsupported Python versions when launching the debugger

src/client/common/utils/localize.ts

@@ -282,6 +282,10 @@ export namespace Interpreters {
         'Interpreters.installPythonTerminalMessage',
         '💡 Please try installing the python package using your package manager. Alternatively you can also download it from https://www.python.org/downloads',
     );
+    export const changePythonInterpreter = localize(
+        'Interpreters.changePythonInterpreter',
+        'Change Python Interpreter',
+    );
 }
 
 export namespace InterpreterQuickPickList {

src/client/debugger/extension/adapter/factory.ts

@@ -22,12 +22,25 @@ import { AttachRequestArguments, LaunchRequestArguments } from '../../types';
 import { IDebugAdapterDescriptorFactory } from '../types';
 import * as nls from 'vscode-nls';
 import { showErrorMessage } from '../../../common/vscodeApis/windowApis';
+import { Common, Interpreters } from '../../../common/utils/localize';
+import { IPersistentStateFactory } from '../../../common/types';
+import { Commands } from '../../../common/constants';
+import { ICommandManager } from '../../../common/application/types';
 
 const localize: nls.LocalizeFunc = nls.loadMessageBundle();
 
+// persistent state names, exported to make use of in testing
+export enum debugStateKeys {
+    doNotShowAgain = 'doNotShowPython36DebugDeprecatedAgain',
+}
+
 @injectable()
 export class DebugAdapterDescriptorFactory implements IDebugAdapterDescriptorFactory {
-    constructor(@inject(IInterpreterService) private readonly interpreterService: IInterpreterService) {}
+    constructor(
+        @inject(ICommandManager) private readonly commandManager: ICommandManager,
+        @inject(IInterpreterService) private readonly interpreterService: IInterpreterService,
+        @inject(IPersistentStateFactory) private persistentState: IPersistentStateFactory,
+    ) {}
 
     public async createDebugAdapterDescriptor(
         session: DebugSession,
@@ -142,8 +155,42 @@ export class DebugAdapterDescriptorFactory implements IDebugAdapterDescriptorFac
         return this.getExecutableCommand(interpreters[0]);
     }
 
+    private async showDeprecatedPythonMessage() {
+        const notificationPromptEnabled = this.persistentState.createGlobalPersistentState(
+            debugStateKeys.doNotShowAgain,
+            false,
+        );
+        if (notificationPromptEnabled.value) {
+            return;
+        }
+        const prompts = [Interpreters.changePythonInterpreter, Common.doNotShowAgain];
+        const selection = await showErrorMessage(
+            localize(
+                'Debug.deprecatedDebuggerError',
+                'The debugger in the python extension no longer supports python versions minor than 3.7.',
+            ),
+            { modal: true },
+            ...prompts,
+        );
+        if (!selection) {
+            return;
+        }
+        if (selection == Interpreters.changePythonInterpreter) {
+            await this.commandManager.executeCommand(Commands.Set_Interpreter);
+        }
+        if (selection == Common.doNotShowAgain) {
+            // Never show the message again
+            await this.persistentState
+                .createGlobalPersistentState(debugStateKeys.doNotShowAgain, false)
+                .updateValue(true);
+        }
+    }
+
     private async getExecutableCommand(interpreter: PythonEnvironment | undefined): Promise<string[]> {
         if (interpreter) {
+            if ((interpreter.version?.major ?? 0) < 3 || (interpreter.version?.minor ?? 0) <= 6) {
+                this.showDeprecatedPythonMessage();
+            }
             return interpreter.path.length > 0 ? [interpreter.path] : [];
         }
         return [];

src/test/debugger/extension/adapter/factory.unit.test.ts

@@ -13,24 +13,30 @@ import { SemVer } from 'semver';
 import { anything, instance, mock, verify, when } from 'ts-mockito';
 import { DebugAdapterExecutable, DebugAdapterServer, DebugConfiguration, DebugSession, WorkspaceFolder } from 'vscode';
 import { ConfigurationService } from '../../../../client/common/configuration/service';
-import { IPythonSettings } from '../../../../client/common/types';
+import { IPersistentStateFactory, IPythonSettings } from '../../../../client/common/types';
 import { Architecture } from '../../../../client/common/utils/platform';
 import { EXTENSION_ROOT_DIR } from '../../../../client/constants';
-import { DebugAdapterDescriptorFactory } from '../../../../client/debugger/extension/adapter/factory';
+import { DebugAdapterDescriptorFactory, debugStateKeys } from '../../../../client/debugger/extension/adapter/factory';
 import { IDebugAdapterDescriptorFactory } from '../../../../client/debugger/extension/types';
 import { IInterpreterService } from '../../../../client/interpreter/contracts';
 import { InterpreterService } from '../../../../client/interpreter/interpreterService';
 import { EnvironmentType } from '../../../../client/pythonEnvironments/info';
 import { clearTelemetryReporter } from '../../../../client/telemetry';
 import { EventName } from '../../../../client/telemetry/constants';
 import * as windowApis from '../../../../client/common/vscodeApis/windowApis';
+import { PersistentState, PersistentStateFactory } from '../../../../client/common/persistentState';
+import { ICommandManager } from '../../../../client/common/application/types';
+import { CommandManager } from '../../../../client/common/application/commandManager';
 
 use(chaiAsPromised);
 
 suite('Debugging - Adapter Factory', () => {
     let factory: IDebugAdapterDescriptorFactory;
     let interpreterService: IInterpreterService;
+    let stateFactory: IPersistentStateFactory;
+    let state: PersistentState<boolean | undefined>;
     let showErrorMessageStub: sinon.SinonStub;
+    let commandManager: ICommandManager;
 
     const nodeExecutable = undefined;
     const debugAdapterPath = path.join(EXTENSION_ROOT_DIR, 'pythonFiles', 'lib', 'python', 'debugpy', 'adapter');
@@ -62,8 +68,16 @@ suite('Debugging - Adapter Factory', () => {
         process.env.VSC_PYTHON_CI_TEST = undefined;
         rewiremock.enable();
         rewiremock('@vscode/extension-telemetry').with({ default: Reporter });
+        stateFactory = mock(PersistentStateFactory);
+        state = mock(PersistentState) as PersistentState<boolean | undefined>;
+        commandManager = mock(CommandManager);
+
         showErrorMessageStub = sinon.stub(windowApis, 'showErrorMessage');
 
+        when(
+            stateFactory.createGlobalPersistentState<boolean | undefined>(debugStateKeys.doNotShowAgain, false),
+        ).thenReturn(instance(state));
+
         const configurationService = mock(ConfigurationService);
         when(configurationService.getSettings(undefined)).thenReturn(({
             experiments: { enabled: true },
@@ -74,7 +88,11 @@ suite('Debugging - Adapter Factory', () => {
         when(interpreterService.getInterpreterDetails(pythonPath)).thenResolve(interpreter);
         when(interpreterService.getInterpreters(anything())).thenReturn([interpreter]);
 
-        factory = new DebugAdapterDescriptorFactory(instance(interpreterService));
+        factory = new DebugAdapterDescriptorFactory(
+            instance(commandManager),
+            instance(interpreterService),
+            instance(stateFactory),
+        );
     });
 
     teardown(() => {
@@ -138,7 +156,24 @@ suite('Debugging - Adapter Factory', () => {
         await expect(promise).to.eventually.be.rejectedWith('Debug Adapter Executable not provided');
         sinon.assert.calledOnce(showErrorMessageStub);
     });
+    test('Display a message if python version is less than 3.7', async () => {
+        when(interpreterService.getInterpreters(anything())).thenReturn([]);
+        const session = createSession({});
+        const deprecatedInterpreter = {
+            architecture: Architecture.Unknown,
+            path: pythonPath,
+            sysPrefix: '',
+            sysVersion: '',
+            envType: EnvironmentType.Unknown,
+            version: new SemVer('3.6.12-test'),
+        };
+        when(state.value).thenReturn(false);
+        when(interpreterService.getActiveInterpreter(anything())).thenResolve(deprecatedInterpreter);
 
+        await factory.createDebugAdapterDescriptor(session, nodeExecutable);
+
+        sinon.assert.calledOnce(showErrorMessageStub);
+    });
     test('Return Debug Adapter server if request is "attach", and port is specified directly', async () => {
         const session = createSession({ request: 'attach', port: 5678, host: 'localhost' });
         const debugServer = new DebugAdapterServer(session.configuration.port, session.configuration.host);