Build PIL on Mac OSX

This entry attempts to give instructions for how to build the Python Imaging Library (PIL) on Mac OSX.

#download and untar the jpeg library
#see here for location http://www.ijg.org/

curl http://path/to/jpegsrc.v6b.tar.gz | tar zxf -

#change directory to

cd jpeg-6b

#run configure

./configure CFLAGS='-fPIC'

#run make

make

#Run make install

sudo make install

#run ranlib

ranlib libjpeg.a

#copy the lib file to lib

cp libjpeg.a /usr/local/lib

#copy headers to include

cp *.h /usr/local/include

#make this your real python

PYTHON_COMMAND="/path/to/your/python"

#get and untar the PIL source

curl http://path/to/Imaging-1.1.6.tar.gz | tar zxf -

# cd

cd Imaging-1.1.6

# copy setup out of it's way

mv setup.py setup.py.tmp

# set up a replacement command
# you can do edit setup.py by hand if you wish

SED_CMD="s|JPEG_ROOT = None|JPEG_ROOT = libinclude(\"/usr/local/lib\")|; s|ZLIB_ROOT = None|ZLIB_ROOT = libinclude(\"/usr/local/lib\")|;"

#replace the stock jpg locations with the new ones you made

cat setup.py.tmp | sed -e "$SED_CMD" > setup.py

#build it

$PYTHON_COMMAND setup.py build_ext -i

#test it

$PYTHON_COMMAND selftest.py

#install it

sudo $PYTHON_COMMAND setup.py install

Undoing transactions in a broken Plone/Zope

Today there was a situation where someone made a permission change that made Plone inaccessible. The ZMI was also inaccessible (by design (not mine)). We could get access to the filesystem, however. So after a couple attempts at undos through in debug....There were issues with permissions and RESPONSE objects and all the other Zope machinery. So I tried mounting a ZODB directly and undoing transactions. The following worked great for me:

filename = "/Users/reedobrien/instances/zeo/msrd/var/Data.fs"
import ZODB.FileStorage
import ZODB.DB
storage = ZODB.FileStorage.FileStorage(filename)
DB = ZODB.DB(storage)
txs = DB.undoLog()[::-1]
DB.undo(id=txs[0]['id'])
import transaction; transaction.commit()

Maybe the wrong way and YMMV, but it stayed in one piece for me.