microsoft · karthiknadig · Nov 9, 2022 · Nov 8, 2022
diff --git a/src/client/linters/linterManager.ts b/src/client/linters/linterManager.ts
@@ -13,8 +13,8 @@ import { Bandit } from './bandit';
 import { Flake8 } from './flake8';
 import { LinterInfo } from './linterInfo';
 import { MyPy } from './mypy';
-import { Flake8ExtensionPrompt } from './prompts/flake8Prompt';
-import { PylintExtensionPrompt } from './prompts/pylintPrompt';
+import { getOrCreateFlake8Prompt } from './prompts/flake8Prompt';
+import { getOrCreatePylintPrompt } from './prompts/pylintPrompt';
 import { Prospector } from './prospector';
 import { Pycodestyle } from './pycodestyle';
 import { PyDocStyle } from './pydocstyle';
@@ -112,9 +112,9 @@ export class LinterManager implements ILinterManager {
             case Product.bandit:
                 return new Bandit(serviceContainer);
             case Product.flake8:
-                return new Flake8(serviceContainer, new Flake8ExtensionPrompt(serviceContainer));
+                return new Flake8(serviceContainer, getOrCreateFlake8Prompt(serviceContainer));
             case Product.pylint:
-                return new Pylint(serviceContainer, new PylintExtensionPrompt(serviceContainer));
+                return new Pylint(serviceContainer, getOrCreatePylintPrompt(serviceContainer));
             case Product.mypy:
                 return new MyPy(serviceContainer);
             case Product.prospector:

diff --git a/src/client/linters/prompts/common.ts b/src/client/linters/prompts/common.ts
@@ -1,13 +1,38 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+import * as fs from 'fs-extra';
+import * as path from 'path';
 import { ShowToolsExtensionPrompt } from '../../common/experiments/groups';
 import { IExperimentService, IExtensions, IPersistentState, IPersistentStateFactory } from '../../common/types';
 import { IServiceContainer } from '../../ioc/types';
+import { traceLog } from '../../logging';
+
+function isExtensionInstalledButDisabled(extensions: IExtensions, extensionId: string): boolean {
+    // When debugging the python extension this `extensionPath` below will point to your repo.
+    // If you are debugging this feature then set the `extensionPath` to right location after
+    // the next line.
+    const pythonExt = extensions.getExtension('ms-python.python');
+    if (pythonExt) {
+        let found = false;
+        traceLog(`Extension search path: ${path.dirname(pythonExt.extensionPath)}`);
+        fs.readdirSync(path.dirname(pythonExt.extensionPath), { withFileTypes: false }).forEach((s) => {
+            if (s.toString().startsWith(extensionId)) {
+                found = true;
+            }
+        });
+        return found;
+    }
+    return false;
+}
 
 export function isExtensionInstalled(serviceContainer: IServiceContainer, extensionId: string): boolean {
     const extensions: IExtensions = serviceContainer.get<IExtensions>(IExtensions);
     const extension = extensions.getExtension(extensionId);
+    if (!extension) {
+        // The extension you are looking for might be disabled.
+        return isExtensionInstalledButDisabled(extensions, extensionId);
+    }
     return extension !== undefined;
 }
 

diff --git a/src/client/linters/prompts/flake8Prompt.ts b/src/client/linters/prompts/flake8Prompt.ts
@@ -61,3 +61,11 @@ export class Flake8ExtensionPrompt implements IToolsExtensionPrompt {
         return false;
     }
 }
+
+let _prompt: IToolsExtensionPrompt | undefined;
+export function getOrCreateFlake8Prompt(serviceContainer: IServiceContainer): IToolsExtensionPrompt {
+    if (!_prompt) {
+        _prompt = new Flake8ExtensionPrompt(serviceContainer);
+    }
+    return _prompt;
+}
diff --git a/src/client/linters/prompts/pylintPrompt.ts b/src/client/linters/prompts/pylintPrompt.ts
@@ -74,3 +74,11 @@ export class PylintExtensionPrompt implements IToolsExtensionPrompt {
         return false;
     }
 }
+
+let _prompt: IToolsExtensionPrompt | undefined;
+export function getOrCreatePylintPrompt(serviceContainer: IServiceContainer): IToolsExtensionPrompt {
+    if (!_prompt) {
+        _prompt = new PylintExtensionPrompt(serviceContainer);
+    }
+    return _prompt;
+}