History of a source line

[Gary van der Merwe]

On 31/03/2010 21:02, Eli Zaretskii wrote:
> Is there any bzr commands or plugins that can show all the revisions
> that changed a certain source line?
> 
> Many times I need to do some forensic research to understand why some
> code is written like it is.  With a large and old package such as
> Emacs, the origins of some code fragments are lost in time.  It is
> easy to see the last change with "bzr annotate" and "bzr diff -c", but
> if you want to see beyond that, you need to grep ChangeLog files, look
> for the revisions corresponding to the entries you _think_ may be
> relevant, and that's a tedious and boring job.  And if you are unlucky
> and the ChangeLog entry was not made at the time, it becomes an almost
> impossible job, certainly an impractical one.
> 
> Does Bazaar offer any cure for this?
> 
> TIA
> 

I log a bug about this, but have not done any work on it.
https://bugs.launchpad.net/qbzr/+bug/479994