Add environment discovery logging and messages when using Python Environments extension

src/client/application/diagnostics/checks/pythonInterpreter.ts

@@ -20,7 +20,7 @@ import {
     IDiagnosticHandlerService,
     IDiagnosticMessageOnCloseHandler,
 } from '../types';
-import { Common } from '../../../common/utils/localize';
+import { Common, Interpreters } from '../../../common/utils/localize';
 import { Commands } from '../../../common/constants';
 import { ICommandManager, IWorkspaceService } from '../../../common/application/types';
 import { sendTelemetryEvent } from '../../../telemetry';
@@ -30,11 +30,12 @@ import { cache } from '../../../common/utils/decorators';
 import { noop } from '../../../common/utils/misc';
 import { getEnvironmentVariable, getOSType, OSType } from '../../../common/utils/platform';
 import { IFileSystem } from '../../../common/platform/types';
-import { traceError } from '../../../logging';
+import { traceError, traceWarn } from '../../../logging';
 import { getExecutable } from '../../../common/process/internal/python';
 import { getSearchPathEnvVarNames } from '../../../common/utils/exec';
 import { IProcessServiceFactory } from '../../../common/process/types';
 import { normCasePath } from '../../../common/platform/fs-paths';
+import { useEnvExtension } from '../../../envExt/api.internal';
 
 const messages = {
     [DiagnosticCodes.NoPythonInterpretersDiagnostic]: l10n.t(
@@ -144,6 +145,9 @@ export class InvalidPythonInterpreterService extends BaseDiagnosticsService
         const isInterpreterSetToDefault = interpreterPathService.get(resource) === 'python';
 
         if (!hasInterpreters && isInterpreterSetToDefault) {
+            if (useEnvExtension()) {
+                traceWarn(Interpreters.envExtDiscoveryNoEnvironments);
+            }
             return [
                 new InvalidPythonInterpreterDiagnostic(
                     DiagnosticCodes.NoPythonInterpretersDiagnostic,
@@ -156,6 +160,9 @@ export class InvalidPythonInterpreterService extends BaseDiagnosticsService
 
         const currentInterpreter = await interpreterService.getActiveInterpreter(resource);
         if (!currentInterpreter) {
+            if (useEnvExtension()) {
+                traceWarn(Interpreters.envExtNoActiveEnvironment);
+            }
             return [
                 new InvalidPythonInterpreterDiagnostic(
                     DiagnosticCodes.InvalidPythonInterpreterDiagnostic,

src/client/common/utils/localize.ts

@@ -191,6 +191,24 @@ export namespace Interpreters {
     export const installingPython = l10n.t('Installing Python into Environment...');
     export const discovering = l10n.t('Discovering Python Interpreters');
     export const refreshing = l10n.t('Refreshing Python Interpreters');
+    export const envExtDiscoveryAttribution = l10n.t(
+        'Environment discovery is managed by the Python Environments extension (ms-python.vscode-python-envs). Check the "Python Environments" output channel for environment-specific logs.',
+    );
+    export const envExtDiscoveryFailed = l10n.t(
+        'Environment discovery failed. Check the "Python Environments" output channel for details. The Python Environments extension (ms-python.vscode-python-envs) manages environment discovery.',
+    );
+    export const envExtDiscoverySlow = l10n.t(
+        'Environment discovery is taking longer than expected. Check the "Python Environments" output channel for progress. The Python Environments extension (ms-python.vscode-python-envs) manages environment discovery.',
+    );
+    export const envExtActivationFailed = l10n.t(
+        'Failed to activate the Python Environments extension (ms-python.vscode-python-envs), which is required for environment discovery. Please ensure it is installed and enabled.',
+    );
+    export const envExtDiscoveryNoEnvironments = l10n.t(
+        'Environment discovery completed but no Python environments were found. Check the "Python Environments" output channel for details.',
+    );
+    export const envExtNoActiveEnvironment = l10n.t(
+        'No Python environment is set for this resource. Check the "Python Environments" output channel for details, or select an interpreter.',
+    );
     export const condaInheritEnvMessage = l10n.t(
         'We noticed you\'re using a conda environment. If you are experiencing issues with this environment in the integrated terminal, we recommend that you let the Python extension change "terminal.integrated.inheritEnv" to false in your user settings. [Learn more](https://aka.ms/AA66i8f).',
     );

src/client/envExt/api.internal.ts

@@ -14,6 +14,8 @@ import {
 } from './types';
 import { executeCommand } from '../common/vscodeApis/commandApis';
 import { getConfiguration } from '../common/vscodeApis/workspaceApis';
+import { traceError, traceLog } from '../logging';
+import { Interpreters } from '../common/utils/localize';
 
 export const ENVS_EXTENSION_ID = 'ms-python.vscode-python-envs';
 
@@ -22,7 +24,8 @@ export function useEnvExtension(): boolean {
     if (_useExt !== undefined) {
         return _useExt;
     }
-    const inExpSetting = getConfiguration('python').get<boolean>('useEnvironmentsExtension', false);
+    const config = getConfiguration('python');
+    const inExpSetting = config?.get<boolean>('useEnvironmentsExtension', false) ?? false;
     // If extension is installed and in experiment, then use it.
     _useExt = !!getExtension(ENVS_EXTENSION_ID) && inExpSetting;
     return _useExt;
@@ -46,12 +49,20 @@ export async function getEnvExtApi(): Promise<PythonEnvironmentApi> {
     }
     const extension = getExtension(ENVS_EXTENSION_ID);
     if (!extension) {
+        traceError(Interpreters.envExtActivationFailed);
         throw new Error('Python Environments extension not found.');
     }
     if (!extension?.isActive) {
-        await extension.activate();
+        try {
+            await extension.activate();
+        } catch (ex) {
+            traceError(Interpreters.envExtActivationFailed, ex);
+            throw ex;
+        }
     }
 
+    traceLog(Interpreters.envExtDiscoveryAttribution);
+
     _extApi = extension.exports as PythonEnvironmentApi;
     _extApi.onDidChangeEnvironment((e) => {
         onDidChangeEnvironmentEnvExtEmitter.fire(e);
@@ -70,7 +81,11 @@ export async function runInBackground(
 
 export async function getEnvironment(scope: GetEnvironmentScope): Promise<PythonEnvironment | undefined> {
     const envExtApi = await getEnvExtApi();
-    return envExtApi.getEnvironment(scope);
+    const env = await envExtApi.getEnvironment(scope);
+    if (!env) {
+        traceLog(Interpreters.envExtNoActiveEnvironment);
+    }
+    return env;
 }
 
 export async function resolveEnvironment(pythonPath: string): Promise<PythonEnvironment | undefined> {

src/client/envExt/envExtApi.ts

@@ -17,7 +17,7 @@ import { PythonEnvCollectionChangedEvent } from '../pythonEnvironments/base/watc
 import { getEnvExtApi } from './api.internal';
 import { createDeferred, Deferred } from '../common/utils/async';
 import { StopWatch } from '../common/utils/stopWatch';
-import { traceLog } from '../logging';
+import { traceError, traceLog, traceWarn } from '../logging';
 import {
     DidChangeEnvironmentsEventArgs,
     EnvironmentChangeKind,
@@ -27,6 +27,7 @@ import {
 import { FileChangeType } from '../common/platform/fileSystemWatcher';
 import { Architecture, isWindows } from '../common/utils/platform';
 import { parseVersion } from '../pythonEnvironments/base/info/pythonVersion';
+import { Interpreters } from '../common/utils/localize';
 
 function getKind(pythonEnv: PythonEnvironment): PythonEnvKind {
     if (pythonEnv.envId.managerId.toLowerCase().endsWith('system')) {
@@ -242,13 +243,23 @@ class EnvExtApis implements IDiscoveryAPI, Disposable {
         this._onProgress.fire({ stage: this.refreshState });
         this._refreshPromise = createDeferred();
 
+        const SLOW_DISCOVERY_THRESHOLD_MS = 25_000;
+        const slowDiscoveryTimer = setTimeout(() => {
+            traceWarn(Interpreters.envExtDiscoverySlow);
+        }, SLOW_DISCOVERY_THRESHOLD_MS);
+
         setImmediate(async () => {
             try {
                 await this.envExtApi.refreshEnvironments(undefined);
+                if (this._envs.length === 0) {
+                    traceWarn(Interpreters.envExtDiscoveryNoEnvironments);
+                }
                 this._refreshPromise?.resolve();
             } catch (error) {
+                traceError(Interpreters.envExtDiscoveryFailed, error);
                 this._refreshPromise?.reject(error);
             } finally {
+                clearTimeout(slowDiscoveryTimer);
                 traceLog(`Native locator: Refresh finished in ${stopwatch.elapsedTime} ms`);
                 this.refreshState = ProgressReportStage.discoveryFinished;
                 this._refreshPromise = undefined;
@@ -297,9 +308,16 @@ class EnvExtApis implements IDiscoveryAPI, Disposable {
         if (envPath === undefined) {
             return undefined;
         }
-        const pythonEnv = await this.envExtApi.resolveEnvironment(Uri.file(envPath));
-        if (pythonEnv) {
-            return this.addEnv(pythonEnv);
+        try {
+            const pythonEnv = await this.envExtApi.resolveEnvironment(Uri.file(envPath));
+            if (pythonEnv) {
+                return this.addEnv(pythonEnv);
+            }
+        } catch (error) {
+            traceError(
+                `Failed to resolve environment "${envPath}" via the Python Environments extension (ms-python.vscode-python-envs). Check the "Python Environments" output channel for details.`,
+                error,
+            );
         }
         return undefined;
     }