override userData path for desktop

app/scripts/comp/launcher-electron.js

@@ -41,7 +41,12 @@ const Launcher = {
         }, callback);
     },
     getUserDataPath: function(fileName) {
-        return this.joinPath(this.remoteApp().getPath('userData'), fileName || '');
+        if (!this.userDataPath) {
+            const realUserDataPath = this.remoteApp().getPath('userData');
+            const suffixReplacementRegex = /[\\/]temp[\\/]\d+\.\d+[\\/]?$/;
+            this.userDataPath = realUserDataPath.replace(suffixReplacementRegex, '');
+        }
+        return this.joinPath(this.userDataPath, fileName || '');
     },
     getTempPath: function(fileName) {
         return this.joinPath(this.remoteApp().getPath('temp'), fileName || '');

desktop/app.js

@@ -11,14 +11,19 @@ let appReady = false;
 let restartPending = false;
 let mainWindowPosition = {};
 let updateMainWindowPositionTimeout = null;
-const windowPositionFileName = path.join(app.getPath('userData'), 'window-position.json');
-const appSettingsFileName = path.join(app.getPath('userData'), 'app-settings.json');
+const userDataDir = app.getPath('userData');
+const windowPositionFileName = path.join(userDataDir, 'window-position.json');
+const appSettingsFileName = path.join(userDataDir, 'app-settings.json');
+const tempUserDataPath = path.join(userDataDir, 'temp');
+const tempUserDataPathRand = Date.now().toString() + Math.random().toString();
 
 let htmlPath = process.argv.filter(arg => arg.startsWith('--htmlpath=')).map(arg => arg.replace('--htmlpath=', ''))[0];
 if (!htmlPath) {
     htmlPath = 'file://' + path.join(__dirname, 'index.html');
 }
 
+app.setPath('userData', path.join(tempUserDataPath, tempUserDataPathRand));
+
 app.on('window-all-closed', () => {
     if (restartPending) {
         // unbind all handlers, load new app.js module and pass control to it
@@ -29,7 +34,7 @@ app.on('window-all-closed', () => {
         electron.globalShortcut.unregisterAll();
         electron.powerMonitor.removeAllListeners('suspend');
         electron.powerMonitor.removeAllListeners('resume');
-        const userDataAppFile = path.join(app.getPath('userData'), 'app.js');
+        const userDataAppFile = path.join(userDataDir, 'app.js');
         delete require.cache[require.resolve('./app.js')];
         require(userDataAppFile);
         app.emit('ready');
@@ -46,6 +51,7 @@ app.on('ready', () => {
         createMainWindow();
         setGlobalShortcuts();
         subscribePowerEvents();
+        deleteOldTempFiles();
     }
 });
 app.on('open-file', (e, path) => {
@@ -349,3 +355,27 @@ function subscribePowerEvents() {
         emitBackboneEvent('power-monitor-resume');
     });
 }
+
+function deleteOldTempFiles() {
+    setTimeout(() => {
+        for (const dir of fs.readdirSync(tempUserDataPath)) {
+            if (dir !== tempUserDataPathRand) {
+                try {
+                    deleteRecursive(path.join(tempUserDataPath, dir));
+                } catch (e) {}
+            }
+        }
+    }, 1000);
+}
+
+function deleteRecursive(dir) {
+    for (const file of fs.readdirSync(dir)) {
+        const filePath = path.join(dir, file);
+        if (fs.lstatSync(filePath).isDirectory()) {
+            deleteRecursive(filePath);
+        } else {
+            fs.unlinkSync(filePath);
+        }
+    }
+    fs.rmdirSync(dir);
+}