pyqt 应用程序执行更新 [英] pyqt application performing updates

问题描述

我有一个 PyQt 应用程序准备发布.一切都很好，我只有一件事要结束.我喜欢自动更新的软件:

I have a PyQt application ready to release. Everything works pretty well and I only have one more thing to wrap up. I love software that updates itself:

• 检查新版本的网址；
• 发现新版本；
• 通知用户更新(点击)→ 更新.

问题是我不知道如何执行此更新.我检查，找到新版本，下载它，然后我必须关闭应用程序并执行新版本的安装程序.如果我关闭它，那么我将无法执行任何其他操作，如果我执行安装程序，我将无法关闭该应用程序.

The problem is that I don't know how to perform this update. I check, I find new version, I download it and then I must close the application and execute the installer of the new version. If I close it then I can't execute anything else, If I execute the installer I can't close the application.

根据一些用户的选择，我的程序还下载并安装了一些需要同样事情的第三方软件:安装程序前关闭，安装程序后重新启动.

Based on some user choices my program also downloads and installs some third party software which needs the same thing: close before install program, restart after install program.

推荐答案

下载新版本的安装程序后，您可以使用 atexit.register() 和 os.exec*() 运行安装程序，例如atexit.register(os.execl, "installer.exe", "installer.exe").这将使安装程序在应用程序即将退出时启动.应用程序会在 os.exec*() 调用后立即退出，因此不会发生竞争条件.

After downloading the installer for the newer version, you can use atexit.register() with os.exec*() to run the installer, e.g. atexit.register(os.execl, "installer.exe", "installer.exe"). This will make the installer start when the application is about to exit. The application will immediately exit after the os.exec*() call, so no race condition will occur.

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