diffs for all successive versions of a file?

I have a file, let's say blah.txt, which contains a line that's
something like:

    xyz=37

In some previous versions of the file, it had different numbers there.
Maybe in one version, it was:

    xyz=392384

And in another:

    xyz=-9932

I would like to find out all values that it has ever had. Obviously I
can use "svn log" to find all revisions at which the file was changed,
and then do "svn diff -r N:M" for each successive pair. However, due to
the number of revisions, this would be somewhat of a pain.

So, what I would like is an easy way to automatically show all changes
ever on this file. I could then feed it to grep to get exactly what I
want. So, something like:

    svn diffForEverySuccessiveRevision blah.txt | grep xyz

I could write a script to do this, based off of the "svn log" / "svn
diff -r N:M" method mentioned above, but I am hoping that there is
already an existing easy way to do it.

Thanks in advance for any help.
Received on 2008-03-17 22:00:40 CET