Move app.yaml to app.yaml.template and add app.yaml to svn:ignore in trunk/app. Each Google App Engine instance needs its own "application:" ID, and this should *not* be committed into the SoC SVN repository in trunk/app. (Individual deployment branches *will* have app.yaml files with Google App Engine application IDs in them, just not trunk/app.)

from django.conf import settings
import os

def runshell():
    dsn = settings.DATABASE_USER
    if settings.DATABASE_PASSWORD:
        dsn += "/%s" % settings.DATABASE_PASSWORD
    if settings.DATABASE_NAME:
        dsn += "@%s" % settings.DATABASE_NAME
    args = ["sqlplus", "-L", dsn]
    os.execvp("sqlplus", args)