Virtualenv, Plone, and Centos 5.x

EDIT: Watch out for python-ldap 2.3.10, the latest version at time of writing. Seems like there’s an issue with it and Centos 5.4. Forcing python-ldap to be version 2.3.8 works, though. (easy_install python-ldap==2.3.8)

Previously, you might have read about setting up a Virtualenv on Ubuntu Jaunty. Now, that was reasonably painless since python-virtualenv and python-setuptools is in the Ubuntu repo. Whether it’s my Centos servers and their misguided repos or me just not being able to find such a related rpm packages, Centos just needs little more love to get it to the same setup. (Note: actually, there was a setuptools RPM that I installed, but no idea why it didn’t give me easy_install…)

Here’s what we’re looking at for this time around.

  • Install the dependencies and various development libraries needed for PIL etc:

    yum install gcc gdbm-devel readline-devel ncurses-devel zlib-devel bzip2-devel sqlite-devel db4-devel openssl-devel tk-devel bluez-libs-devel libjpeg-devel zlib-devel freetype-devel
  • Install setuptools and virtualenv:

    sh setuptools-0.6c9-py2.4.egg
    rm -f setuptools-0.6c9-py2.4.egg
    easy_install-2.4 -U setuptools
    easy_install-2.4 virtualenv
  • Create a virtual environment and activate it:

    virtualenv -p /usr/bin/python2.4 .
    source ./bin/activate
  • Easy install the dependencies of Plone. Not sure if they’re needed for Centos, but it did all work nicely after doing this:

    easy_install --find-links Imaging
    easy_install --find-links PILwoTK
    easy_install python-ldap
    easy_install lxml

Clear as mud? I thought so. Essentially the only difference is actually getting the right development libraries and then getting setuptools itself working correctly. As I mentioned, for whatever reason my python-setuptools rpm doesn’t have easy install. Maybe it’s because it’s an old version? Who knows. This is an easy enough workaround.

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