I like to tag files with xattr, e.g.
xattr -w user.foo bar myfile.
Is there a way that I can then use Spotlight to search for a given xattr key (or key-value pair)? For example, if I put
foo:bar in the Spotlight search bar, I'd like it to return
myfile in the result list.
I realize you can do this by writing the
com.apple.metadata:_kMDItemUserTags attribute - but this is not very portable, so I'm curious if this can be extended to all xattr tags.