systemd-xdg-autostart-generator — User unit generator for XDG autostart files
/usr/lib/systemd/user-generators/systemd-xdg-autostart-generator
systemd-xdg-autostart-generator is a generator
    that creates .service units for
    XDG autostart
    files.
    This permits desktop environments to delegate startup of these applications to
    systemd(1)
    .
Units created by systemd-xdg-autostart-generator
    can be started by the desktop environment using "xdg-desktop-autostart.target".
    See
    systemd.special(7)
    for more details.
XDG autostart may be conditionalized using both standardized and non-standardized keys.
    In order to handle these, the generator may create one or more ExecCondition= entries.
    For non-standardized keys, well-known helper binaries provided by Desktop Environments are used.
    All external helpers must detect their corresponding desktop environment and
    must return success when run in a different environment.
    This is important as all ExecCondition= directives must succeed for an application to be started.
Table 1. Special XDG desktop file entries that are processed
| Entry | Handling | 
|---|---|
| Hidden=,X-systemd-skip= | No service will be generated if set to true | 
| OnlyShowIn=,NotShowIn= | ExecCondition=usingsystemd-xdg-autostart-condition | 
| TryExec= | No service will be generated if the binary does not exist or cannot be executed | 
| AutostartCondition=(GNOME extension) | ExecCondition=usinggnome-systemd-autostart-condition | 
| X-GNOME-Autostart-Phase= | No service will be generated if set to any value | 
| X-KDE-autostart-condition= | ExecCondition=usingkde-systemd-start-condition | 
systemd-xdg-autostart-generator implements
    systemd.generator(7).