Okay, so the issue I am seeing with file associations looks to be down to the desktop databases not being updated by appimaged. To make file associations work I need to:
- Install appimaged plus log out and in again
- Download the application AppImage to a supported directory.
- $ update-desktop-database ~/.local/share/applications/ (command line)
- $ update-mime-database ~/.local/share/mime/ (command line)
After this things work exactly as I would expect. Note that step 3. forces the system to analyse the .desktop files in the specified directory and update the database of which applications support which mime types.
Step 4 forces the system to analyse the mime XML files in the specified directory and update its database of mime types to file extensions.
I have been testing with Ubuntu 16.04 and both steps 3 and 4 are required after appimaged has installed the files from the AppImage.
Could appimaged be updated to do steps 3 and 4 automatically? For AppImages which require file associations I would say that appimaged currently does not work. This is at least true for Ubuntu 16.04.
Thanks,
Chris