Qt安装程序框架:自动更新 [英] Qt Installer Framework: Auto Update

问题描述

我目前正在使用Qt安装程序框架，并设法建立了一个在线存储库.我想知道的是:

I'm currently using the Qt Installer Framework and managed to set up an online repository. What I want to know is:

框架是否提供某种自动更新"机制，例如每次程序/系统启动时都会检查更新的插件/服务吗?
检查更新就足够了，因为安装本身可以使用维护工具完成.

Does the Framework provide some kind of "auto-update" mechanism, e.g. a plugin/service that checks for updates every time the program/system starts?
Check for updates would be enough, since the installation itself can be done using the maintanance tool.

关于这个主题，我所能找到的只是这句话:

All I could find about this topic was this small sentence:

最终用户可以在初始安装后使用维护工具从服务器安装其他组件，以及在服务器上发布更新后接收自动更新.

从这里

: http://doc.qt.io/qtinstallerframework/ifw-overview.html#choosing-installer-type

感谢您的帮助！

修改:建议
基于这个问题的被接受者，我创建了一个小型库，可以使用安装程序框架自动检查更新- https://github. com/Skycoder42/QtAutoUpdater

Suggestion
Based on this question's accepted answere I created a small library to automatically check for updates using the installer framework - https://github.com/Skycoder42/QtAutoUpdater

推荐答案

我要做的是使用QProcess运行维护工具，然后检查输出.它具有一种模式，其中它不运行GUI，而仅输出更新信息(如果可用).

What I do, is run the maintenance tool using QProcess, and then check the output. It has a mode where it doesn't run the GUI but only outputs update information if available.

请注意，在应用程序启动时，我将工作目录设置为应用程序的路径，因此我可以运行maintenancetool.

Note that I set the working directory to the application's path when the applications starts, so I can just run maintenancetool.

QProcess process;
process.start("maintenancetool --checkupdates");

// Wait until the update tool is finished
process.waitForFinished();

if(process.error() != QProcess::UnknownError)
{
    qDebug() << "Error checking for updates";
    return false;
}

// Read the output
QByteArray data = process.readAllStandardOutput();

// No output means no updates available
// Note that the exit code will also be 1, but we don't use that
// Also note that we should parse the output instead of just checking if it is empty if we want specific update info
if(data.isEmpty())
{
    qDebug() << "No updates available";
    return false;
}

// Call the maintenance tool binary
// Note: we start it detached because this application need to close for the update
QStringList args("--updater");
bool success = QProcess::startDetached("maintenancetool", args);

// Close the application
qApp->closeAllWindows();

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