freedesktop

Application {
    ...
    Depends { name: "freedesktop" }

    Group {
        files: [
            ...

            // Declare the desktop and appstream files
            "data/my-app.desktop",
            "data/my-app.metainfo.xml",
        ]
    }

    // Add/change some fields in the desktop file
    freedesktop.desktopKeys: ({
        'Exec': FileInfo.joinPaths(qbs.installPrefix,
                                   product.installDir,
                                   product.targetName) + ' --argument',
        'X-Application-Version': product.version,
    })

    // Define the source directory for application icons
    freedesktop.hicolorRoot: project.sourceDirectory + "/icons/"

    // Declare the application icons
    Group {
        prefix: project.sourceDirectory + "/icons/"
        files: [
            "32x32/apps/my-application.png",
            "32x32@2/apps/my-application.png",
            "32x32/mimetypes/application-format.png",
            ...
            "scalable/apps/my-application.svg",
        ]
        fileTags: "freedesktop.appIcon"
    }
}