configure: pull the version number from Bazaar

[Yann E. MORIN]

Michael, Thomas, All,

On Thursday 20 October 2011 23:51:32 Yann E. MORIN wrote:
> On Thursday 20 October 2011 05:38:13 Michael Hope wrote:
> > If '.version' ends with bzr then use bzr to automatically add the
> > revision number to the version string.
> The official repository is using Mercurial, and only that will be
> supported upstream.

During the Prague events last week, a suggestion was made (by Thomas)
regarding this issue:
 - ./configure checks if a script is present
 - ./configure runs the script
 - the script is expected to output a single line, using whatever
   is deemed fit to compute a VCS version
 - ./configure appends the line above to the version it internally
   computed

That way, it is easy to add such a script to the different VCSes used by
the different users, without the need to always port the change to the
./configure script, and without the change always trying to escape up
to upstream. ;-)

What do you think? Would that be OK with you? With others?

Regards,
Yann E. MORIN.

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