[hadess]

Modify Exec field in .desktop file so that the Ares application advertises that it can open files (well, a single file at a time).

Then add all the relevant ROM and disk mime-types as being supported. Systems list used to select the mime-types to add: https://flathub.org/en/apps/dev.ares.ares
All the registered mime-types:
https://gitlab.freedesktop.org/xdg/shared-mime-info/blob/master/data/freedesktop.org.xml.in

Closes: #2621

[flagrama]

What happens when you compile without a core and try to open a file that uses that core?

[hadess]

What happens when you compile without a core and try to open a file that uses that core?

I didn't know cores were compile-option, I used the Flatpak manifest to build ares, and that was my one and only time compiling it.

The desktop file should then be generated from a .in file, it would look something like (in pseudo-code):

mimetypes=""
if "a26" in ${ARES_CORES}
  mimetypes += "application/x-atari-2600-rom;"
endif

# Generate ares.desktop from its .in variant, replacing `@ARES_MIMETYPES@` with the mimetypes list
generate_file("ares.desktop", "ares.desktop.in", "@ARES_MIMETYPES@", mimetypes)

I suck at cmake though, so can't help with the actual implementation.

I've added the Atari 2600 mime-type to the list though.

[hadess]

And I've now added the Atari 5200 mime-type that should get added in:
https://gitlab.freedesktop.org/xdg/shared-mime-info/-/merge_requests/431