[Python-modules-team] [Pyro] parallel installation of pyro 3.x and 4.x (was Pyro 4 in Debian )

[Alexandre Fayolle]

On Thursday 26 August 2010 23:53:22 Irmen wrote:
> On 12-8-2010 11:23, Alexandre Fayolle wrote:
> > I'm forwarding the message below (with some slight editing) to the
> > pyro-core mailing list for feedback.
> > 
> > Irmen, in order to ease parallel installation of pyro3 and pyro4, would
> > you mind changing the package name of pyro4 from 'pyro' to 'pyro4'? I
> > think this would be beneficial for many users and that it would ease
> > migration to pyro 4 (by easing the detection of which version is
> > installed, and allowing legacy application to run side by side with new
> > apps). Being able to have both versions installed is a must have from a
> > system administration point of view (both installed on the same machine,
> > and both running on the same LAN).
> 
> Alexandre, are you referring to the debian software package name?
> I'm not making those packages myself. That is taken care of by the package
> maintainer which is now Carl Chenet, I believe.
> I added him explicitly to the cc-list.
> 
> Carl, can you comment on this? I think Alexandre has a valid concern.
> 

Thanks for coming back on this

Not only the debian software package name (this is a question I raised on the 
Debian mailing list), but specifically the Python package name. Having both 
pyro 3 and 4 using the same package name makes it difficult to have both 
installed in parallel : the programs using pyro must know how the packages are 
deployed and tweak sys.path accordingly. That's why I was suggesting that  
pyro 4.X could use a top level package called "pyro4" rather than "pyro" : 
this will enable both versions to be installed in parallel on servers hosting 
legacy applications working with pyro 3 and new (independent) applications 
using pyro4. 

Another concern in this regard is being able to run a pyro3 and a pyro4 
nameserver on the same LAN : is this currently supported? 

-- 
Alexandre Fayolle
http://qa.debian.org/developer.php?login=afayolle%40debian.org&comaint=yes