Check Whether an Application is Debian Package/Flatpak/Snap

[ChrisOfBristol]

My program runs a function of an application. The command for the Snap doesn't work for the Debian Package and vice-versa. I could just try each in turn and ignore the command which fails, but that seem a bit crude to me. Is there a command I could use or a variable I could check to see whether the user has installed the application from a Debian application, a Flatpak or a Snap?

The only way I can think of is to use a command like snap info {program} > filename.txt then read and edit the text file to find whether it indicates success or not. That's very long-winded.

[Frogs Hair]

I don't know of a single command, but there could be one.Process of elimination is not an elegant solution and some applications listed in the output are default and not user installed.

snap list

flatpak list

[ChrisOfBristol]

I have found 3 useful commands on a post elsewhere:

command -v {application name} (Posix compliant systems only)
hash {application name}
type {application name}

If I call type from Python, it produces the most useful result - a zero if it has found the application and something else if not. Since the Debian package and the Snap have different names, I can try both and see which comes up with a zero.