Fix prompt that shows up when debugging using an invalid Python (microsoft/vscode-python#19561)

Author: Kartik Raj

extensions/positron-python/src/client/common/utils/localize.ts

@@ -34,7 +34,7 @@ export namespace Diagnostics {
     );
     export const invalidPythonPathInDebuggerSettings = localize(
         'diagnostics.invalidPythonPathInDebuggerSettings',
-        'You need to select a Python interpreter before you start debugging.\n\nTip: click on "Select Python Interpreter" in the status bar.',
+        'You need to select a Python interpreter before you start debugging.\n\nTip: click on "Select Interpreter" in the status bar.',
     );
     export const invalidPythonPathInDebuggerLaunch = localize(
         'diagnostics.invalidPythonPathInDebuggerLaunch',

extensions/positron-python/src/client/debugger/extension/configuration/resolvers/base.ts

@@ -124,9 +124,12 @@ export abstract class BaseConfigurationResolver<T extends DebugConfiguration>
                 (await this.interpreterService.getActiveInterpreter(workspaceFolder))?.path ??
                 this.configurationService.getSettings(workspaceFolder).pythonPath;
             debugConfiguration.pythonPath = interpreterPath;
-            this.pythonPathSource = PythonPathSource.settingsJson;
         } else {
             debugConfiguration.pythonPath = systemVariables.resolveAny(debugConfiguration.pythonPath);
+        }
+        if (debugConfiguration.python === '${command:python.interpreterPath}' || !debugConfiguration.python) {
+            this.pythonPathSource = PythonPathSource.settingsJson;
+        } else {
             this.pythonPathSource = PythonPathSource.launchJson;
         }
         debugConfiguration.python = systemVariables.resolveAny(debugConfiguration.python);

extensions/positron-python/src/client/debugger/extension/configuration/resolvers/launch.ts

@@ -13,7 +13,6 @@ import { IConfigurationService } from '../../../../common/types';
 import { IInterpreterService } from '../../../../interpreter/contracts';
 import { DebuggerTypeName } from '../../../constants';
 import { DebugOptions, DebugPurpose, LaunchRequestArguments } from '../../../types';
-import { PythonPathSource } from '../../types';
 import { BaseConfigurationResolver } from './base';
 import { IDebugEnvironmentVariablesService } from './helper';
 
@@ -195,9 +194,7 @@ export class LaunchConfigurationResolver extends BaseConfigurationResolver<Launc
             debugConfiguration.debugAdapterPython,
             debugConfiguration.debugLauncherPython,
         ]) {
-            const source =
-                executable === debugConfiguration.pythonPath ? this.pythonPathSource : PythonPathSource.launchJson;
-            if (!(await diagnosticService.validatePythonPath(executable, source, folder?.uri))) {
+            if (!(await diagnosticService.validatePythonPath(executable, this.pythonPathSource, folder?.uri))) {
                 return false;
             }
         }