Background

Currently, Deja Dup only includes and excludes folders. Here are some things that I might one day want to be able to include/exclude:

• Specific files
• Files/Folders matching certain criteria like:
  • Bigger than X MB
  • Name
  • Mime type
• List of packages installed in system
• Online data like:
  • Flickr photos
  • GMail emails
• Application Data
  • Evolution mail etc
  • XChat logs

I am also willing to entertain the idea that some of the above options are inherently confusing or just bad ideas to present to the user.

How to design a nice interface for all that?

• Something like Evolution's or Thunderbird's filter interface, where you can add and remove lines of match criteria.
• A drop down combo box with an add button next to it that initiated some dialog or inline further selection
• A wizard

What should the behavior be if an online data source isn't available?