Re: Automatic versioning

[Xavier Maillard <xma@gnu.org>]

   Kevin Rodgers <kevin.d.rodgers@gmail.com> writes:
   >>> (defadvice save-buffer (before version activate)
   >>>   "I wish to have all files versioned, period."
   >>>   (ad-set-arg 0 '(64)))
   >>
   >> What exactly does this do?
   >
   > It makes save-buffer behave as if it were invoked as
   > `C-u C-u C-u C-x C-s' (see "Prefixed with three C-u's"
   > below).

   > | Prefixed with three C-u's, marks this version
   > |  to become a backup when the next save is done,
   > |  and unconditionally makes the previous version into a backup file.

   That seems like a terribly inefficient way of doing things.  Creating many many
   multiple backup copies.  Especially because I save quite regularly.  I could
   easily end up with hundreds or thousands of backup copies.  Not what I want.  It
   seems that there should be a system almost exactly like mediawiki's in which
   diffs are saved, and you can see a list of versions, compare them--even across
   ranges, revert them, spin through different versions with a next/previous
   button.  ect.

Another solution would be to "embed" some sort of the mechanism
from a modern DVC like GNU Bazaar or Git. Given the fact that
they have been "libitized" (you can take advantage of them by
linking your program against them), this should be quite easy to
implement.

WDYT ?

	Xavier
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