[Zope3-Users] Re: Using svn checkout with zc packages
Philipp von Weitershausen
philipp at weitershausen.de
Sun Jul 29 17:40:24 EDT 2007
On 29 Jul 2007, at 23:27 , Tom Dossis wrote:
>> P.S.: I can't recommend easy_install because that will install
>> eggs into the global site-packages location (which is rarely a
>> good idea when you're deploying Zope). Unless of course you use
>> workingenv or virtual python.
> You can configure the easy_install target location(s) easily enough:
> For example I use the file ~/.pydistutils.cfg to install all eggs
> to my 'personal' location:
> (see: http://peak.telecommunity.com/DevCenter/EasyInstall#mac-os-x-
> install_lib = ~/Library/Python/$py_version_short/site-packages
> install_scripts = ~/bin
> Are there shortcomings using these options?
For me, the whole point of *not* installing Zope into site-packages
is isolation. I have many different sandboxes that I don't want to
interfere with each other (just like in the old days, I could have
multiple Zope installations and instances of those installations that
didn't know anything of each other).
Sure, I can use .pydistutils.cfg to set an alternate location, but
that'll apply for *all* sandboxes again, therefore not serving the
isolation concern. And yes, I can tell easy_install on a one-by-one
basis where I want to install my eggs, but that's not really
comfortable (also, the destination has to be on your PYTHONPATH).
zc.buildout is very comfortable here. It will make sure that your
sandbox will only have those eggs on sys.path that they need, not
more and not less (even though you can have eggs shared by sandboxes
so that you'll only have to download and install the same version of
an egg once).
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