Centralize fs usage.

src/client/common/application/webPanels/webPanel.ts

@@ -3,13 +3,13 @@
 'use strict';
 import '../../extensions';
 
-import * as fs from 'fs-extra';
 import * as uuid from 'uuid/v4';
 import { Uri, Webview, WebviewPanel, window } from 'vscode';
 
 import { Identifiers } from '../../../datascience/constants';
 import { InteractiveWindowMessages } from '../../../datascience/interactive-common/interactiveWindowTypes';
 import { SharedMessages } from '../../../datascience/messages';
+import { IFileSystem } from '../../platform/types';
 import { IDisposableRegistry } from '../../types';
 import * as localize from '../../utils/localize';
 import { IWebPanel, IWebPanelOptions, WebPanelMessage } from '../types';
@@ -26,10 +26,12 @@ export class WebPanel implements IWebPanel {
     private id = uuid();
 
     constructor(
+        private fs: IFileSystem,
         private disposableRegistry: IDisposableRegistry,
         private port: number | undefined,
         private token: string | undefined,
-        private options: IWebPanelOptions) {
+        private options: IWebPanelOptions
+    ) {
         this.panel = window.createWebviewPanel(
             options.title.toLowerCase().replace(' ', ''),
             options.title,
@@ -86,7 +88,7 @@ export class WebPanel implements IWebPanel {
     // tslint:disable-next-line:no-any
     private async load() {
         if (this.panel) {
-            const localFilesExist = await Promise.all(this.options.scripts.map(s => fs.pathExists(s)));
+            const localFilesExist = await Promise.all(this.options.scripts.map(s => this.fs.fileExists(s)));
             if (localFilesExist.every(exists => exists === true)) {
 
                 // Call our special function that sticks this script inside of an html page

src/client/common/application/webPanels/webPanelProvider.ts

@@ -5,6 +5,7 @@ import { inject, injectable } from 'inversify';
 import * as portfinder from 'portfinder';
 import * as uuid from 'uuid/v4';
 
+import { IFileSystem } from '../../platform/types';
 import { IDisposableRegistry } from '../../types';
 import { IWebPanel, IWebPanelOptions, IWebPanelProvider } from '../types';
 import { WebPanel } from './webPanel';
@@ -15,13 +16,15 @@ export class WebPanelProvider implements IWebPanelProvider {
     private port: number | undefined;
     private token: string | undefined;
 
-    constructor(@inject(IDisposableRegistry) private disposableRegistry: IDisposableRegistry) {
-    }
+    constructor(
+        @inject(IDisposableRegistry) private disposableRegistry: IDisposableRegistry,
+        @inject(IFileSystem) private fs: IFileSystem
+    ) { }
 
     // tslint:disable-next-line:no-any
     public async create(options: IWebPanelOptions): Promise<IWebPanel> {
         const serverData = options.startHttpServer ? await this.ensureServerIsRunning() : { port: undefined, token: undefined };
-        return new WebPanel(this.disposableRegistry, serverData.port, serverData.token, options);
+        return new WebPanel(this.fs, this.disposableRegistry, serverData.port, serverData.token, options);
     }
 
     private async ensureServerIsRunning(): Promise<{ port: number; token: string }> {
@@ -36,7 +39,7 @@ export class WebPanelProvider implements IWebPanelProvider {
             const webPanelServerModule = require('./webPanelServer') as typeof import('./webPanelServer');
 
             // Start the server listening.
-            const webPanelServer = new webPanelServerModule.WebPanelServer(this.port, this.token);
+            const webPanelServer = new webPanelServerModule.WebPanelServer(this.port, this.token, this.fs);
             webPanelServer.start();
             this.disposableRegistry.push(webPanelServer);
         }

src/client/common/application/webPanels/webPanelServer.ts

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 import * as Cors from '@koa/cors';
-import * as fs from 'fs-extra';
 import * as http from 'http';
 import * as Koa from 'koa';
 import * as compress from 'koa-compress';
@@ -11,6 +10,7 @@ import * as path from 'path';
 import { EXTENSION_ROOT_DIR } from '../../../constants';
 import { Identifiers } from '../../../datascience/constants';
 import { SharedMessages } from '../../../datascience/messages';
+import { IFileSystem } from '../../platform/types';
 
 interface IState {
     cwd: string;
@@ -23,7 +23,7 @@ export class WebPanelServer {
     private server: http.Server | undefined;
     private state = new Map<string, IState>();
 
-    constructor(private port: number, private token: string) {
+    constructor(private port: number, private token: string, private fs: IFileSystem) {
         this.app.use(Cors());
         this.app.use(compress());
         this.app.use(logger());
@@ -110,7 +110,7 @@ export class WebPanelServer {
                 break;
 
         }
-        ctx.body = fs.createReadStream(filePath);
+        ctx.body = this.fs.createReadStream(filePath);
     }
 
     // Debugging tips:

src/client/common/editor.ts

@@ -1,10 +1,10 @@
 import { Diff, diff_match_patch } from 'diff-match-patch';
-import * as fs from 'fs-extra';
 import { injectable } from 'inversify';
 import * as md5 from 'md5';
 import { EOL } from 'os';
 import * as path from 'path';
 import { Position, Range, TextDocument, TextEdit, Uri, WorkspaceEdit } from 'vscode';
+import { IFileSystem } from '../common/platform/types';
 import { IEditorUtils } from './types';
 
 // Code borrowed from goFormat.ts (Go Extension for VS Code)
@@ -80,7 +80,7 @@ export function getTextEditsFromPatch(before: string, patch: string): TextEdit[]
 
     return textEdits;
 }
-export function getWorkspaceEditsFromPatch(filePatches: string[], workspaceRoot?: string): WorkspaceEdit {
+export function getWorkspaceEditsFromPatch(filePatches: string[], workspaceRoot: string | undefined, fs: IFileSystem): WorkspaceEdit {
     const workspaceEdit = new WorkspaceEdit();
     filePatches.forEach(patch => {
         const indexOfAtAt = patch.indexOf('@@');
@@ -107,7 +107,7 @@ export function getWorkspaceEditsFromPatch(filePatches: string[], workspaceRoot?
 
         let fileName = fileNameLines[0].substring(fileNameLines[0].indexOf(' a') + 3).trim();
         fileName = workspaceRoot && !path.isAbsolute(fileName) ? path.resolve(workspaceRoot, fileName) : fileName;
-        if (!fs.existsSync(fileName)) {
+        if (!fs.fileExistsSync(fileName)) {
             return;
         }
 
@@ -123,7 +123,7 @@ export function getWorkspaceEditsFromPatch(filePatches: string[], workspaceRoot?
             throw new Error('Unable to parse Patch string');
         }
 
-        const fileSource = fs.readFileSync(fileName).toString('utf8');
+        const fileSource = fs.readFileSync(fileName);
         const fileUri = Uri.file(fileName);
 
         // Add line feeds and build the text edits
@@ -226,24 +226,22 @@ function getTextEditsInternal(before: string, diffs: [number, string][], startLi
     return edits;
 }
 
-export function getTempFileWithDocumentContents(document: TextDocument): Promise<string> {
-    return new Promise<string>((resolve, reject) => {
-        const ext = path.extname(document.uri.fsPath);
-        // Don't create file in temp folder since external utilities
-        // look into configuration files in the workspace and are not able
-        // to find custom rules if file is saved in a random disk location.
-        // This means temp file has to be created in the same folder
-        // as the original one and then removed.
+export async function getTempFileWithDocumentContents(document: TextDocument, fs: IFileSystem): Promise<string> {
+    const ext = path.extname(document.uri.fsPath);
+    // Don't create file in temp folder since external utilities
+    // look into configuration files in the workspace and are not
+    // to find custom rules if file is saved in a random disk location.
+    // This means temp file has to be created in the same folder
+    // as the original one and then removed.
 
-        // tslint:disable-next-line:no-require-imports
-        const fileName = `${document.uri.fsPath}.${md5(document.uri.fsPath)}${ext}`;
-        fs.writeFile(fileName, document.getText(), ex => {
-            if (ex) {
-                reject(`Failed to create a temporary file, ${ex.message}`);
-            }
-            resolve(fileName);
-        });
-    });
+    // tslint:disable-next-line:no-require-imports
+    const fileName = `${document.uri.fsPath}.${md5(document.uri.fsPath)}${ext}`;
+    try {
+        await fs.writeFile(fileName, document.getText());
+    } catch (ex) {
+        throw Error(`Failed to create a temporary file, ${ex.message}`);
+    }
+    return fileName;
 }
 
 /**

src/client/common/installer/moduleInstaller.ts

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-import * as fs from 'fs';
 import { injectable } from 'inversify';
 import * as path from 'path';
 import { CancellationToken, OutputChannel, ProgressLocation, ProgressOptions, window } from 'vscode';
@@ -12,10 +11,11 @@ import { EventName } from '../../telemetry/constants';
 import { IApplicationShell } from '../application/types';
 import { wrapCancellationTokens } from '../cancellation';
 import { STANDARD_OUTPUT_CHANNEL } from '../constants';
+import { IFileSystem } from '../platform/types';
 import { ITerminalServiceFactory } from '../terminal/types';
 import { ExecutionInfo, IConfigurationService, IOutputChannel } from '../types';
 import { Products } from '../utils/localize';
-import { isResource, noop } from '../utils/misc';
+import { isResource } from '../utils/misc';
 import { IModuleInstaller, InterpreterUri } from './types';
 
 @injectable()
@@ -42,10 +42,11 @@ export abstract class ModuleInstaller implements IModuleInstaller {
                 if (!interpreter || interpreter.type !== InterpreterType.Unknown) {
                     await terminalService.sendCommand(pythonPath, args, token);
                 } else if (settings.globalModuleInstallation) {
-                    if (await this.isPathWritableAsync(path.dirname(pythonPath))) {
-                        await terminalService.sendCommand(pythonPath, args, token);
-                    } else {
+                    const fs = this.serviceContainer.get<IFileSystem>(IFileSystem);
+                    if (await fs.isDirReadonly(path.dirname(pythonPath))) {
                         this.elevatedInstall(pythonPath, args);
+                    } else {
+                        await terminalService.sendCommand(pythonPath, args, token);
                     }
                 } else {
                     await terminalService.sendCommand(pythonPath, args.concat(['--user']), token);
@@ -88,19 +89,6 @@ export abstract class ModuleInstaller implements IModuleInstaller {
         }
         return args;
     }
-    private async isPathWritableAsync(directoryPath: string): Promise<boolean> {
-        const filePath = `${directoryPath}${path.sep}___vscpTest___`;
-        return new Promise<boolean>(resolve => {
-            fs.open(filePath, fs.constants.O_CREAT | fs.constants.O_RDWR, (error, fd) => {
-                if (!error) {
-                    fs.close(fd, () => {
-                        fs.unlink(filePath, noop);
-                    });
-                }
-                return resolve(!error);
-            });
-        });
-    }
 
     private elevatedInstall(execPath: string, args: string[]) {
         const options = {

src/client/common/net/fileDownloader.ts

@@ -3,12 +3,11 @@
 
 'use strict';
 
-import { WriteStream } from 'fs';
 import { inject, injectable } from 'inversify';
 import * as requestTypes from 'request';
 import { Progress, ProgressLocation } from 'vscode';
 import { IApplicationShell } from '../application/types';
-import { IFileSystem } from '../platform/types';
+import { IFileSystem, WriteStream } from '../platform/types';
 import { DownloadOptions, IFileDownloader, IHttpClient } from '../types';
 import { Http } from '../utils/localize';
 import { noop } from '../utils/misc';