pre-commit hooks and $Id$ banners?

[John Arbash Meinel]

Igor Goryachev wrote:
> Hello, everyone.
> 
> Are there any plans on implementing pre-commit hooks? How could I help
> with that?
> 
> And is it possible (and how better?) to implement banners $Id$,
> $Revision$ support like in CVS or Subversion? I do really need this
> because I work with specific OTP software which handles this stuff
> and acts somehow according to it.
> 
> Thank you.
> 
> 

Are you sure that this isn't better than having a separate file which
maintains the state of the tree?

Having used bzr, I've done quite a bit to get my build scripts to
automatically generate a version file. Which is really nice, since in
the released product, you can find out exactly what source tree it came
from (and in my scripts, I even detect if the tree is "unclean").

On a side project I was working with some people who use SVN, and I
thought I could try the $Rev$ thing again (I used it in CVS but it
horribly breaks merging, which SVN supposedly fixed).

The problem is that it only sets it to the "LastChangedRevision" of
*this* file. So I have to put one in *every* file, just so that I can
figure out what state my project is in.

Now, I realize your OTP software probably does something special. Which
may not be related to a build script.

But what if I give you a plugin which gives you a post-commit hook,
which will fill a file with the last committed revision information?
This is fairly cheap, and doesn't have all problems with
merging/automunging of files, etc.

It also would be fairly easy to write a plugin which filters the source
on a "bzr export" so that it would expand them at that time.

In the meantime, this is the wiki page discussing keywords:
http://bazaar-vcs.org/KeywordExpansion

John
=:->

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