Open separate Python terminals when running different Python files (microsoft#21202)

Closes microsoft#21097
Closes microsoft#14094

Author: Kartik Raj

src/client/common/terminal/factory.ts

@@ -3,6 +3,7 @@
 
 import { inject, injectable } from 'inversify';
 import { Uri } from 'vscode';
+import * as path from 'path';
 import { IInterpreterService } from '../../interpreter/contracts';
 import { IServiceContainer } from '../../ioc/types';
 import { PythonEnvironment } from '../../pythonEnvironments/info';
@@ -26,10 +27,14 @@ export class TerminalServiceFactory implements ITerminalServiceFactory {
     public getTerminalService(options: TerminalCreationOptions): ITerminalService {
         const resource = options?.resource;
         const title = options?.title;
-        const terminalTitle = typeof title === 'string' && title.trim().length > 0 ? title.trim() : 'Python';
+        let terminalTitle = typeof title === 'string' && title.trim().length > 0 ? title.trim() : 'Python';
         const interpreter = options?.interpreter;
         const id = this.getTerminalId(terminalTitle, resource, interpreter);
         if (!this.terminalServices.has(id)) {
+            if (this.terminalServices.size >= 1 && resource) {
+                terminalTitle = `${terminalTitle}: ${path.basename(resource.fsPath).replace('.py', '')}`;
+            }
+            options.title = terminalTitle;
             const terminalService = new TerminalService(this.serviceContainer, options);
             this.terminalServices.set(id, terminalService);
         }
@@ -53,6 +58,6 @@ export class TerminalServiceFactory implements ITerminalServiceFactory {
         const workspaceFolder = this.serviceContainer
             .get<IWorkspaceService>(IWorkspaceService)
             .getWorkspaceFolder(resource || undefined);
-        return `${title}:${workspaceFolder?.uri.fsPath || ''}:${interpreter?.path}`;
+        return `${title}:${workspaceFolder?.uri.fsPath || ''}:${interpreter?.path}:${resource?.fsPath || ''}`;
     }
 }

src/client/terminals/codeExecution/terminalCodeExecution.ts

@@ -19,8 +19,7 @@ import { ICodeExecutionService } from '../../terminals/types';
 export class TerminalCodeExecutionProvider implements ICodeExecutionService {
     private hasRanOutsideCurrentDrive = false;
     protected terminalTitle!: string;
-    private _terminalService!: ITerminalService;
-    private replActive?: Promise<boolean>;
+    private replActive = new Map<string, Promise<boolean>>();
     constructor(
         @inject(ITerminalServiceFactory) protected readonly terminalServiceFactory: ITerminalServiceFactory,
         @inject(IConfigurationService) protected readonly configurationService: IConfigurationService,
@@ -48,19 +47,27 @@ export class TerminalCodeExecutionProvider implements ICodeExecutionService {
         await this.getTerminalService(resource).sendText(code);
     }
     public async initializeRepl(resource?: Uri) {
-        if (this.replActive && (await this.replActive)) {
-            await this._terminalService.show();
+        const terminalService = this.getTerminalService(resource);
+        let replActive = this.replActive.get(resource?.fsPath || '');
+        if (replActive && (await replActive)) {
+            await terminalService.show();
             return;
         }
-        this.replActive = new Promise<boolean>(async (resolve) => {
+        replActive = new Promise<boolean>(async (resolve) => {
             const replCommandArgs = await this.getExecutableInfo(resource);
-            await this.getTerminalService(resource).sendCommand(replCommandArgs.command, replCommandArgs.args);
+            terminalService.sendCommand(replCommandArgs.command, replCommandArgs.args);
 
             // Give python repl time to start before we start sending text.
             setTimeout(() => resolve(true), 1000);
         });
+        this.replActive.set(resource?.fsPath || '', replActive);
+        this.disposables.push(
+            terminalService.onDidCloseTerminal(() => {
+                this.replActive.delete(resource?.fsPath || '');
+            }),
+        );
 
-        await this.replActive;
+        await replActive;
     }
 
     public async getExecutableInfo(resource?: Uri, args: string[] = []): Promise<PythonExecInfo> {
@@ -77,18 +84,10 @@ export class TerminalCodeExecutionProvider implements ICodeExecutionService {
         return this.getExecutableInfo(resource, executeArgs);
     }
     private getTerminalService(resource?: Uri): ITerminalService {
-        if (!this._terminalService) {
-            this._terminalService = this.terminalServiceFactory.getTerminalService({
-                resource,
-                title: this.terminalTitle,
-            });
-            this.disposables.push(
-                this._terminalService.onDidCloseTerminal(() => {
-                    this.replActive = undefined;
-                }),
-            );
-        }
-        return this._terminalService;
+        return this.terminalServiceFactory.getTerminalService({
+            resource,
+            title: this.terminalTitle,
+        });
     }
     private async setCwdForFileExecution(file: Uri) {
         const pythonSettings = this.configurationService.getSettings(file);

src/test/common/terminals/factory.unit.test.ts

@@ -105,7 +105,7 @@ suite('Terminal Service Factory', () => {
         expect(notSameAsThirdInstance).to.not.equal(true, 'Instances are the same');
     });
 
-    test('Ensure same terminal is returned when using resources from the same workspace', () => {
+    test('Ensure different terminal is returned when using different resources from the same workspace', () => {
         const file1A = Uri.file('1a');
         const file2A = Uri.file('2a');
         const fileB = Uri.file('b');
@@ -131,7 +131,7 @@ suite('Terminal Service Factory', () => {
         const terminalForFileB = factory.getTerminalService({ resource: fileB }) as SynchronousTerminalService;
 
         const terminalsAreSameForWorkspaceA = terminalForFile1A.terminalService === terminalForFile2A.terminalService;
-        expect(terminalsAreSameForWorkspaceA).to.equal(true, 'Instances are not the same for Workspace A');
+        expect(terminalsAreSameForWorkspaceA).to.equal(false, 'Instances are the same for Workspace A');
 
         const terminalsForWorkspaceABAreDifferent =
             terminalForFile1A.terminalService === terminalForFileB.terminalService;