--revision PREVX wish

[Karl Chen <qu...@hkn.eecs.berkeley.edu>]

Hi subversion developers,

I wish there were a better mechanism for specifying a file for example
"two changes ago".  I have emacs macros that make it very easy to do
"diff between workfile/repository-version and X changes ago".  For
example I have "M-2 M-v M-=" to compare the workfile to the file 2
changes ago.  This only works in cvs by assuming that version numbers
are strictly increasing by 1 (which is almost always true in cvs).
Subversion's PREV revision keyword is useful for comparing to _1_
change ago but not any other.  To compare to 2 changes ago you have to
look at the log output for the previous change's revision number,
requiring much more than 4 keystrokes (in my setup) and much more
brain processing power by user.

So I wish there were a way to specify "X changes ago" to the
--revision switch.  The PREV and COMMITTED revision keywords already
exist which consider individual files rather than the repository as a
whole.  Maybe "PREV2", "PREV3" tags, etc if that isn't too ugly a
kludge or some new syntax like "-2", i.e. "svn diff -1:HEAD foo.c"
equivalent to PREV:HEAD and also allowing e.g. "svn diff -2:1234
foo.c" comparing the file at revision 1234 and two changes before
that.  Maybe I'm thinking too cvs/rcs-ish but even in a project it is
useful to think about a file as a unit when you can easily check
successive changes in the file's history.  It would simply be a
shortcut to having to check svn log.


-- 
Karl Chen / quarl@quarl.org

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Re: --revision PREVX wish

[kf...@collab.net]

Karl Chen <qu...@hkn.eecs.berkeley.edu> writes:
> So I wish there were a way to specify "X changes ago" to the
> --revision switch.  The PREV and COMMITTED revision keywords already
> exist which consider individual files rather than the repository as a
> whole.  Maybe "PREV2", "PREV3" tags, etc if that isn't too ugly a
> kludge or some new syntax like "-2", i.e. "svn diff -1:HEAD foo.c"
> equivalent to PREV:HEAD and also allowing e.g. "svn diff -2:1234
> foo.c" comparing the file at revision 1234 and two changes before
> that.  Maybe I'm thinking too cvs/rcs-ish but even in a project it is
> useful to think about a file as a unit when you can easily check
> successive changes in the file's history.  It would simply be a
> shortcut to having to check svn log.

I've often wished for the same.  Can you file an "ENHANCEMENT" issue
about this?  We may not be able to get to it before 1.0, but at least
we won't forget :-).


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