[Unison-hackers] treating some directories atomically, and ignoring socket files

[Julian Squires]

Thanks for the feedback, everyone.  I like the idea of the "up" action
in the text UI, but implementing it right now was outside the scope of
what I was working on.

I've attached patches that implement an atomic option, so you can
specify, e.g., "-atomic Name\ .git -atomic Name\ .svn", and these
directories will be treated indivisibly.  Presumably one can use the
pattern matching facilities of this kind of predicate to match
packages on OS X but I haven't investigated it.

I have no doubt there are improvements that can be made to how I have
implemented this, so I welcome your comments.

-- 
Julian Squires
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