microsoft · DonJayamanne · Jan 3, 2018 · Nov 3, 2017 · Nov 9, 2017 · Nov 9, 2017
diff --git a/src/client/common/process/types.ts b/src/client/common/process/types.ts
@@ -37,8 +37,8 @@ export type ExecutionResult<T extends string | Buffer> = {
 export const IProcessService = Symbol('IProcessService');
 
 export interface IProcessService {
-    execObservable(file: string, args: string[], options: SpawnOptions): ObservableExecutionResult<string>;
-    exec(file: string, args: string[], options: SpawnOptions): Promise<ExecutionResult<string>>;
+    execObservable(file: string, args: string[], options?: SpawnOptions): ObservableExecutionResult<string>;
+    exec(file: string, args: string[], options?: SpawnOptions): Promise<ExecutionResult<string>>;
 }
 
 export const IPythonExecutionFactory = Symbol('IPythonExecutionFactory');

diff --git a/src/client/common/types.ts b/src/client/common/types.ts
@@ -58,7 +58,8 @@ export enum Product {
     mypy = 11,
     unittest = 12,
     ctags = 13,
-    rope = 14
+    rope = 14,
+    isort = 15
 }
 
 export enum ModuleNamePurpose {

diff --git a/src/client/common/utils.ts b/src/client/common/utils.ts
@@ -1,7 +1,6 @@
 'use strict';
 // tslint:disable: no-any one-line no-suspicious-comment prefer-template prefer-const no-unnecessary-callback-wrapper no-function-expression no-string-literal no-control-regex no-shadowed-variable
 
-import * as child_process from 'child_process';
 import * as fs from 'fs';
 import * as os from 'os';
 import * as path from 'path';
@@ -30,18 +29,6 @@ export function fsReaddirAsync(root: string): Promise<string[]> {
     });
 }
 
-export async function getPathFromPythonCommand(pythonPath: string): Promise<string> {
-    return await new Promise<string>((resolve, reject) => {
-        child_process.execFile(pythonPath, ['-c', 'import sys;print(sys.executable)'], (_, stdout) => {
-            if (stdout) {
-                const lines = stdout.split(/\r?\n/g).map(line => line.trim()).filter(line => line.length > 0);
-                resolve(lines.length > 0 ? lines[0] : '');
-            } else {
-                reject();
-            }
-        });
-    });
-}
 export function formatErrorForLogging(error: Error | string): string {
     let message: string = '';
     if (typeof error === 'string') {

diff --git a/src/client/extension.ts b/src/client/extension.ts
@@ -14,6 +14,7 @@ import { STANDARD_OUTPUT_CHANNEL } from './common/constants';
 import { FeatureDeprecationManager } from './common/featureDeprecationManager';
 import { createDeferred } from './common/helpers';
 import { registerTypes as processRegisterTypes } from './common/process/serviceRegistry';
+import { IProcessService, IPythonExecutionFactory } from './common/process/types';
 import { registerTypes as commonRegisterTypes } from './common/serviceRegistry';
 import { GLOBAL_MEMENTO, IDisposableRegistry, ILogger, IMemento, IOutputChannel, IPersistentStateFactory, WORKSPACE_MEMENTO } from './common/types';
 import { registerTypes as variableRegisterTypes } from './common/variables/serviceRegistry';
@@ -85,23 +86,24 @@ export async function activate(context: vscode.ExtensionContext) {
     const pythonSettings = settings.PythonSettings.getInstance();
     sendStartupTelemetry(activated, serviceContainer);
 
-    sortImports.activate(context, standardOutputChannel);
+    sortImports.activate(context, standardOutputChannel, serviceContainer);
     const interpreterManager = new InterpreterManager(serviceContainer);
     // This must be completed before we can continue.
     await interpreterManager.autoSetInterpreter();
 
     interpreterManager.refresh()
         .catch(ex => console.error('Python Extension: interpreterManager.refresh', ex));
     context.subscriptions.push(interpreterManager);
+    const processService = serviceContainer.get<IProcessService>(IProcessService);
     const interpreterVersionService = serviceContainer.get<IInterpreterVersionService>(IInterpreterVersionService);
-    context.subscriptions.push(new SetInterpreterProvider(interpreterManager, interpreterVersionService));
+    context.subscriptions.push(new SetInterpreterProvider(interpreterManager, interpreterVersionService, processService));
     context.subscriptions.push(...activateExecInTerminalProvider());
     context.subscriptions.push(activateUpdateSparkLibraryProvider());
     activateSimplePythonRefactorProvider(context, standardOutputChannel, serviceContainer);
     const jediFactory = new JediFactory(context.asAbsolutePath('.'), serviceContainer);
     context.subscriptions.push(...activateGoToObjectDefinitionProvider(jediFactory));
 
-    context.subscriptions.push(new ReplProvider());
+    context.subscriptions.push(new ReplProvider(serviceContainer.get<IPythonExecutionFactory>(IPythonExecutionFactory)));
 
     // Enable indentAction
     // tslint:disable-next-line:no-non-null-assertion
@@ -130,7 +132,7 @@ export async function activate(context: vscode.ExtensionContext) {
     context.subscriptions.push(vscode.languages.registerHoverProvider(PYTHON, new PythonHoverProvider(jediFactory)));
     context.subscriptions.push(vscode.languages.registerReferenceProvider(PYTHON, new PythonReferenceProvider(jediFactory)));
     context.subscriptions.push(vscode.languages.registerCompletionItemProvider(PYTHON, new PythonCompletionItemProvider(jediFactory), '.'));
-    context.subscriptions.push(vscode.languages.registerCodeLensProvider(PYTHON, new ShebangCodeLensProvider()));
+    context.subscriptions.push(vscode.languages.registerCodeLensProvider(PYTHON, new ShebangCodeLensProvider(processService)));
 
     const symbolProvider = new PythonSymbolProvider(jediFactory);
     context.subscriptions.push(vscode.languages.registerDocumentSymbolProvider(PYTHON, symbolProvider));

diff --git a/src/client/interpreter/configuration/setInterpreterProvider.ts b/src/client/interpreter/configuration/setInterpreterProvider.ts
@@ -2,6 +2,7 @@ import * as path from 'path';
 import { commands, ConfigurationTarget, Disposable, QuickPickItem, QuickPickOptions, Uri, window, workspace } from 'vscode';
 import { InterpreterManager } from '../';
 import * as settings from '../../common/configSettings';
+import { IProcessService } from '../../common/process/types';
 import { IInterpreterVersionService, PythonInterpreter, WorkspacePythonPath } from '../contracts';
 import { ShebangCodeLensProvider } from '../display/shebangCodeLensProvider';
 import { PythonPathUpdaterService } from './pythonPathUpdaterService';
@@ -15,7 +16,9 @@ interface PythonPathQuickPickItem extends QuickPickItem {
 export class SetInterpreterProvider implements Disposable {
     private disposables: Disposable[] = [];
     private pythonPathUpdaterService: PythonPathUpdaterService;
-    constructor(private interpreterManager: InterpreterManager, interpreterVersionService: IInterpreterVersionService) {
+    constructor(private interpreterManager: InterpreterManager,
+        interpreterVersionService: IInterpreterVersionService,
+        private processService: IProcessService) {
         this.disposables.push(commands.registerCommand('python.setInterpreter', this.setInterpreter.bind(this)));
         this.disposables.push(commands.registerCommand('python.setShebangInterpreter', this.setShebangInterpreter.bind(this)));
         this.pythonPathUpdaterService = new PythonPathUpdaterService(new PythonPathUpdaterServiceFactory(), interpreterVersionService);
@@ -88,7 +91,7 @@ export class SetInterpreterProvider implements Disposable {
     }
 
     private async setShebangInterpreter(): Promise<void> {
-        const shebang = await ShebangCodeLensProvider.detectShebang(window.activeTextEditor!.document);
+        const shebang = await new ShebangCodeLensProvider(this.processService).detectShebang(window.activeTextEditor!.document);
         if (!shebang) {
             return;
         }

diff --git a/src/client/interpreter/display/index.ts b/src/client/interpreter/display/index.ts
@@ -1,19 +1,20 @@
-import * as child_process from 'child_process';
 import { EOL } from 'os';
 import * as path from 'path';
 import { Disposable, StatusBarItem, Uri } from 'vscode';
 import { PythonSettings } from '../../common/configSettings';
+import { IProcessService } from '../../common/process/types';
 import * as utils from '../../common/utils';
 import { IInterpreterLocatorService, IInterpreterVersionService } from '../contracts';
-import { getActiveWorkspaceUri, getFirstNonEmptyLineFromMultilineString } from '../helpers';
+import { getActiveWorkspaceUri } from '../helpers';
 import { IVirtualEnvironmentManager } from '../virtualEnvs/types';
 
 // tslint:disable-next-line:completed-docs
 export class InterpreterDisplay implements Disposable {
     constructor(private statusBar: StatusBarItem,
         private interpreterLocator: IInterpreterLocatorService,
         private virtualEnvMgr: IVirtualEnvironmentManager,
-        private versionProvider: IInterpreterVersionService) {
+        private versionProvider: IInterpreterVersionService,
+        private processService: IProcessService) {
 
         this.statusBar.command = 'python.setInterpreter';
     }
@@ -69,11 +70,8 @@ export class InterpreterDisplay implements Disposable {
             .then(env => env ? env.name : '');
     }
     private async getFullyQualifiedPathToInterpreter(pythonPath: string) {
-        return new Promise<string>(resolve => {
-            child_process.execFile(pythonPath, ['-c', 'import sys;print(sys.executable)'], (_, stdout) => {
-                resolve(getFirstNonEmptyLineFromMultilineString(stdout));
-            });
-        })
+        return this.processService.exec(pythonPath, ['-c', 'import sys;print(sys.executable)'])
+            .then(output => output.stdout.trim())
             .then(value => value.length === 0 ? pythonPath : value)
             .catch(() => pythonPath);
     }

diff --git a/src/client/interpreter/display/shebangCodeLensProvider.ts b/src/client/interpreter/display/shebangCodeLensProvider.ts
@@ -1,16 +1,14 @@
-'use strict';
-import * as child_process from 'child_process';
 import * as vscode from 'vscode';
 import { CancellationToken, CodeLens, TextDocument } from 'vscode';
 import * as settings from '../../common/configSettings';
+import { IProcessService } from '../../common/process/types';
 import { IS_WINDOWS } from '../../common/utils';
-import { getFirstNonEmptyLineFromMultilineString } from '../../interpreter/helpers';
 
 export class ShebangCodeLensProvider implements vscode.CodeLensProvider {
-    // tslint:disable-next-line:prefer-type-cast no-any
+    // tslint:disable-next-line:no-any
     public onDidChangeCodeLenses: vscode.Event<void> = vscode.workspace.onDidChangeConfiguration as any as vscode.Event<void>;
-    // tslint:disable-next-line:function-name
-    public static async detectShebang(document: TextDocument): Promise<string | undefined> {
+    constructor(private processService: IProcessService) { }
+    public async detectShebang(document: TextDocument): Promise<string | undefined> {
         const firstLine = document.lineAt(0);
         if (firstLine.isEmptyOrWhitespace) {
             return;
@@ -21,40 +19,30 @@ export class ShebangCodeLensProvider implements vscode.CodeLensProvider {
         }
 
         const shebang = firstLine.text.substr(2).trim();
-        const pythonPath = await ShebangCodeLensProvider.getFullyQualifiedPathToInterpreter(shebang);
+        const pythonPath = await this.getFullyQualifiedPathToInterpreter(shebang);
         return typeof pythonPath === 'string' && pythonPath.length > 0 ? pythonPath : undefined;
     }
-    private static async getFullyQualifiedPathToInterpreter(pythonPath: string) {
-        if (pythonPath.indexOf('bin/env ') >= 0 && !IS_WINDOWS) {
-            // In case we have pythonPath as '/usr/bin/env python'
-            return new Promise<string>(resolve => {
-                const command = child_process.exec(`${pythonPath} -c 'import sys;print(sys.executable)'`);
-                let result = '';
-                command.stdout.on('data', (data) => {
-                    result += data.toString();
-                });
-                command.on('close', () => {
-                    resolve(getFirstNonEmptyLineFromMultilineString(result));
-                });
-            });
-        } else {
-            return new Promise<string>(resolve => {
-                child_process.execFile(pythonPath, ['-c', 'import sys;print(sys.executable)'], (_, stdout) => {
-                    resolve(getFirstNonEmptyLineFromMultilineString(stdout));
-                });
-            });
-        }
-    }
-
     public async provideCodeLenses(document: TextDocument, token: CancellationToken): Promise<CodeLens[]> {
         const codeLenses = await this.createShebangCodeLens(document);
         return Promise.resolve(codeLenses);
     }
-
+    private async getFullyQualifiedPathToInterpreter(pythonPath: string) {
+        let cmdFile = pythonPath;
+        let args = ['-c', 'import sys;print(sys.executable)'];
+        if (pythonPath.indexOf('bin/env ') >= 0 && !IS_WINDOWS) {
+            // In case we have pythonPath as '/usr/bin/env python'.
+            const parts = pythonPath.split(' ').map(part => part.trim()).filter(part => part.length > 0);
+            cmdFile = parts.shift()!;
+            args = parts.concat(args);
+        }
+        return this.processService.exec(cmdFile, args)
+            .then(output => output.stdout.trim())
+            .catch(() => '');
+    }
     private async createShebangCodeLens(document: TextDocument) {
-        const shebang = await ShebangCodeLensProvider.detectShebang(document);
+        const shebang = await this.detectShebang(document);
         const pythonPath = settings.PythonSettings.getInstance(document.uri).pythonPath;
-        const resolvedPythonPath = await ShebangCodeLensProvider.getFullyQualifiedPathToInterpreter(pythonPath);
+        const resolvedPythonPath = await this.getFullyQualifiedPathToInterpreter(pythonPath);
         if (!shebang || shebang === resolvedPythonPath) {
             return [];
         }

diff --git a/src/client/interpreter/index.ts b/src/client/interpreter/index.ts
@@ -1,6 +1,7 @@
 import * as path from 'path';
 import { ConfigurationTarget, Disposable, StatusBarAlignment, Uri, window, workspace } from 'vscode';
 import { PythonSettings } from '../common/configSettings';
+import { IProcessService } from '../common/process/types';
 import { IServiceContainer } from '../ioc/types';
 import { PythonPathUpdaterService } from './configuration/pythonPathUpdaterService';
 import { PythonPathUpdaterServiceFactory } from './configuration/pythonPathUpdaterServiceFactory';
@@ -21,7 +22,8 @@ export class InterpreterManager implements Disposable {
         const statusBar = window.createStatusBarItem(StatusBarAlignment.Left);
         this.interpreterProvider = serviceContainer.get<PythonInterpreterLocatorService>(IInterpreterLocatorService, INTERPRETER_LOCATOR_SERVICE);
         const versionService = serviceContainer.get<IInterpreterVersionService>(IInterpreterVersionService);
-        this.display = new InterpreterDisplay(statusBar, this.interpreterProvider, virtualEnvMgr, versionService);
+        const processService = serviceContainer.get<IProcessService>(IProcessService);
+        this.display = new InterpreterDisplay(statusBar, this.interpreterProvider, virtualEnvMgr, versionService, processService);
         this.pythonPathUpdaterService = new PythonPathUpdaterService(new PythonPathUpdaterServiceFactory(), versionService);
         PythonSettings.getInstance().addListener('change', () => this.onConfigChanged());
         this.disposables.push(window.onDidChangeActiveTextEditor(() => this.refresh()));

diff --git a/src/client/interpreter/locators/services/condaEnvService.ts b/src/client/interpreter/locators/services/condaEnvService.ts
@@ -1,8 +1,8 @@
-import * as child_process from 'child_process';
 import * as fs from 'fs-extra';
 import { inject, injectable } from 'inversify';
 import * as path from 'path';
 import { Uri } from 'vscode';
+import { IProcessService } from '../../../common/process/types';
 import { VersionUtils } from '../../../common/versionUtils';
 import { ICondaLocatorService, IInterpreterLocatorService, IInterpreterVersionService, InterpreterType, PythonInterpreter } from '../../contracts';
 import { AnacondaCompanyName, AnacondaCompanyNames, CONDA_RELATIVE_PY_PATH, CondaInfo } from './conda';
@@ -12,7 +12,8 @@ import { CondaHelper } from './condaHelper';
 export class CondaEnvService implements IInterpreterLocatorService {
     private readonly condaHelper = new CondaHelper();
     constructor( @inject(ICondaLocatorService) private condaLocator: ICondaLocatorService,
-        @inject(IInterpreterVersionService) private versionService: IInterpreterVersionService) {
+        @inject(IInterpreterVersionService) private versionService: IInterpreterVersionService,
+        @inject(IProcessService) private processService: IProcessService) {
     }
     public async getInterpreters(resource?: Uri) {
         return this.getSuggestionsFromConda();
@@ -99,32 +100,24 @@ export class CondaEnvService implements IInterpreterLocatorService {
     }
     private async getSuggestionsFromConda(): Promise<PythonInterpreter[]> {
         return this.condaLocator.getCondaFile()
-            .then(async condaFile => {
-                return new Promise<PythonInterpreter[]>((resolve, reject) => {
-                    // interrogate conda (if it's on the path) to find all environments.
-                    child_process.execFile(condaFile, ['info', '--json'], (_, stdout) => {
-                        if (stdout.length === 0) {
-                            resolve([]);
-                            return;
-                        }
+            .then(condaFile => this.processService.exec(condaFile, ['info', '--json']))
+            .then(output => output.stdout)
+            .then(stdout => {
+                if (stdout.length === 0) {
+                    return [];
+                }
 
-                        try {
-                            // tslint:disable-next-line:prefer-type-cast
-                            const info = JSON.parse(stdout) as CondaInfo;
-                            resolve(this.parseCondaInfo(info));
-                        } catch (e) {
-                            // Failed because either:
-                            //   1. conda is not installed.
-                            //   2. `conda info --json` has changed signature.
-                            //   3. output of `conda info --json` has changed in structure.
-                            // In all cases, we can't offer conda pythonPath suggestions.
-                            resolve([]);
-                        }
-                    });
-                }).catch((err) => {
-                    console.error('Python Extension (getSuggestionsFromConda):', err);
+                try {
+                    const info = JSON.parse(stdout) as CondaInfo;
+                    return this.parseCondaInfo(info);
+                } catch {
+                    // Failed because either:
+                    //   1. conda is not installed.
+                    //   2. `conda info --json` has changed signature.
+                    //   3. output of `conda info --json` has changed in structure.
+                    // In all cases, we can't offer conda pythonPath suggestions.
                     return [];
-                });
-            });
+                }
+            }).catch(() => []);
     }
 }
diff --git a/src/client/interpreter/locators/services/condaLocator.ts b/src/client/interpreter/locators/services/condaLocator.ts
@@ -1,4 +1,3 @@
-import * as child_process from 'child_process';
 import * as fs from 'fs-extra';
 import { inject, injectable, named, optional } from 'inversify';
 import * as path from 'path';
@@ -70,15 +69,9 @@ export class CondaLocatorService implements ICondaLocatorService {
         }
     }
     public async isCondaInCurrentPath() {
-        return new Promise<boolean>((resolve, reject) => {
-            child_process.execFile('conda', ['--version'], (_, stdout) => {
-                if (stdout && stdout.length > 0) {
-                    resolve(true);
-                } else {
-                    resolve(false);
-                }
-            });
-        });
+        return this.processService.exec('conda', ['--version'])
+            .then(output => output.stdout.length > 0)
+            .catch(() => false);
     }
     private async getCondaFileFromKnownLocations(): Promise<string> {
         const condaFiles = await Promise.all(KNOWN_CONDA_LOCATIONS