Heck, there's gotta be some sort of reason why so many people write their own drop-in replacements for xdg-open.
I actually find myself in the unlikely position of envying Windows for prompting you on new filetypes.
Don't worry though -- Windows still has its own file association mess.
...
Assuming you have something else capable of opening said files (or default to gvim or something ???) you can use mimeo (from Xyne's repo) to quickly set file associations in bulk.
As long as you have something in your user mimeapps.list then it doesn't matter what the system mimeinfo.cache says. By which I mean the irritating statement:
Quote:
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The order of the desktop files found for a MIME type is not significant. Therefore, an external mechanism must be used to determine what is the preferred desktop file for a MIME type.
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