使用 electron-builder electron-updater 跨 electon 应用程序更新的持久文件存储

Persistent file storage across electon app updates with electron-builder electron-updater

当我使用 electron-builder autoUpdater 更新 Electron 应用程序时,我定义的所有文件存储都被覆盖。我需要哪些设置才能使这些文件持久化?

这是一个 MCVE 示例(针对主进程):

const { app, BrowserView, BrowserWindow,ipcMain } = require('electron');
const log = require("electron-log");
const { autoUpdater } = require("electron-updater");
const fs = require( 'fs');
const path = require('path');

let win
let rand = String(Math.floor(Math.random() * 10000));
console.log('Generated random number',rand)

app.whenReady().then(async () => {
  win = new BrowserWindow({
    fullscreen: false,
    webPreferences: {
      nodeIntegration: false,
      preload: path.join(__dirname, 'preload.js')
    }
  })
  win.loadFile('index.html');
  setInterval(function() {
    let a = autoUpdater.checkForUpdatesAndNotify();
  }, 60000);


  let exists = false;
  fs.stat('persistentFile',(err, stats) => {
      if (err == null){
        exists = true
      }
      if (!exists){
          fs.writeFile('persistentFile',rand,(err)=>{
            if (err) throw err;
            win.webContents.send('console_message', 'Persistent file has been created!',rand);
            console.log('Persistent file has been created!',rand);
          })
      }
      else {
          fs.readFile('persistentFile',(err,data)=>{
            if (err) throw err;
            win.webContents.send('console_message', 'Persistent already exists',data);
            console.log('Persistent already exists',data);
          })
      }
    })

  win.webContents.send('console_message', 'Random No is' + String(rand));


})

在本示例中,我希望文件 persistentFile 在更新后保持不变,以便它包含从第一个版本生成的数字。但是,目前,每次更新都会覆盖该文件。

您将如何确保跨 electron-builder 自动更新的持久文件存储?

在看了 Cameron Nokes 的优秀博客后,我设法做到了这一点:

cameronnokes.com/blog/how-to-store-user-data-in-electron:

Storing user data in the operating system’s designated location for user’s app data is the idiomatic way for native app’s to persist user data because:

  • when we auto-update the app, our source files may get moved or delete

  • changing or adding to an app’s internal files will invalidate the code signature

为此,我使用 const userDataPath = app.getPath('userData'); 获取 OS 应用程序存储位置的路径。然后将对 'persistentFile' 的引用更改为 String(userDataPath)+'/persistentFile':