microsoft/vscode-react-native
Publicmirrored from https://github.com/microsoft/vscode-react-nativeAvailable
src/utils/packageJsonWatcher.ts
60lines · modecode
| 1 | // Copyright (c) Microsoft Corporation. All rights reserved. |
| 2 | // Licensed under the MIT license. See LICENSE file in the project root for details. |
| 3 | |
| 4 | import * as fs from "fs"; |
| 5 | import * as path from "path"; |
| 6 | import * as Q from "q"; |
| 7 | import * as vscode from "vscode"; |
| 8 | |
| 9 | import {FileSystem} from "../utils/node/fileSystem"; |
| 10 | |
| 11 | export class PackageJsonWatcher { |
| 12 | private fileSystemWatcher: vscode.FileSystemWatcher; |
| 13 | constructor() { |
| 14 | this.fileSystemWatcher = vscode.workspace.createFileSystemWatcher("package.json"); |
| 15 | } |
| 16 | |
| 17 | public startWatching(): void { |
| 18 | this.fileSystemWatcher.onDidChange((changeEvent: vscode.Uri) => this.configureReactNativeWorkspace()); |
| 19 | this.fileSystemWatcher.onDidCreate((changeEvent: vscode.Uri) => this.configureReactNativeWorkspace()); |
| 20 | this.configureReactNativeWorkspace(); |
| 21 | } |
| 22 | |
| 23 | private dropDebuggerStub(): void { |
| 24 | let launcherPath = require.resolve("../debugger/launcher"); |
| 25 | const extensionVersionNumber = require("../../package.json").version; |
| 26 | let debuggerEntryCode = |
| 27 | `// This file is automatically generated. version:${extensionVersionNumber} |
| 28 | try { |
| 29 | var path = require("path"); |
| 30 | var Launcher = require(${JSON.stringify(launcherPath)}).Launcher; |
| 31 | new Launcher(path.resolve(__dirname, "..")).launch(); |
| 32 | } catch (e) { |
| 33 | throw new Error("Unable to launch application. Try deleting .vscode/launchReactNative.js and restarting vscode."); |
| 34 | }`; |
| 35 | let vscodeFolder = path.join(vscode.workspace.rootPath, ".vscode"); |
| 36 | let debugStub = path.join(vscodeFolder, "launchReactNative.js"); |
| 37 | |
| 38 | let fsUtil = new FileSystem(); |
| 39 | |
| 40 | fsUtil.ensureDirectory(vscodeFolder).then(() => { |
| 41 | fsUtil.ensureFileWithContents(debugStub, debuggerEntryCode); |
| 42 | }).catch((err: Error) => { |
| 43 | vscode.window.showErrorMessage(err.message); |
| 44 | }); |
| 45 | } |
| 46 | |
| 47 | private configureReactNativeWorkspace(): void { |
| 48 | let packageJsonPath = path.join(vscode.workspace.rootPath, "package.json"); |
| 49 | Q.nfcall(fs.readFile, packageJsonPath, "utf-8").then((contents: string) => { |
| 50 | let packageJsonContents = JSON.parse(contents); |
| 51 | if (packageJsonContents && packageJsonContents.dependencies |
| 52 | && "react-native" in packageJsonContents.dependencies) { |
| 53 | // Looks like a react native project: Set it up for debugging |
| 54 | this.dropDebuggerStub(); |
| 55 | } |
| 56 | }).catch(() => {}); |
| 57 | // If the readFile fails, or the JSON.parse fails, then we ignore the exception |
| 58 | // and assume this is not a react-native project. |
| 59 | } |
| 60 | } |