qubes-desktop-file-install is called by qubes-triggers-desktop-file-install. It's
arguments are based on the Gnome desktop-install-file utility to allow it to be replaced
by same. Currently the Gnome utility can not be used since it automatically validates
the .desktop entry files with no option to skip validation and will fail on some third
party .desktop files that are not formed properly.
A single trigger script is shared between Fedora, Debian. This script is used by the
package managers triggers and will copy original .desktop files from `/etc/xdg/autostart`
to `/usr/share/qubes/xdg/autostart` and modify the OnlyShownIn / NotShownIn, etc. The
original .desktop files are left untouched and left in place.
Qubes modifies the XDG_CONFIG_DIRS to first include the `/usr/share/qubes/xdg`
directory (XDG_CONFIG_DIRS=/usr/share/qubes/xdg:/etc/xdg).
If a package gets removed, it's desktop entry is also removed from the /usr/share/qubes/xdg
directory.
'qubes-desktop-file-install' options:
--dir DIR Install desktop files to the DIR directory (default: <FILE>)
--force Force overwrite of existing desktop files (default: False)
--remove-show-in Remove the "OnlyShowIn" and "NotShowIn" entries from the desktop file (default: False)
--remove-key KEY Remove the KEY key from the desktop files, if present
--set-key (KEY VALUE) Set the KEY key to VALUE
--remove-only-show-in ENVIRONMENT Remove ENVIRONMENT from the list of desktop environment where the desktop files should be displayed
--add-only-show-in ENVIRONMENT Add ENVIRONMENT to the list of desktop environment where the desktop files should be displayed
--remove-not-show-in ENVIRONMENT Remove ENVIRONMENT from the list of desktop environment where the desktop files should not be displayed
--add-not-show-in ENVIRONMENT Add ENVIRONMENT to the list of desktop environment where the desktop files should not be displayed
