autopkg-build.sh

#!/bin/bash
exec > >(logger -i -t autopkg-build) 2>&1

BUILD_RECIPE_DIR="/dir/with/autopkg/recipenames"
EMAIL_ERRORS_TO='blah@acme.com'
my_name=$(basename $0)

# Allows us to get exit code of autopkg and not tee
set -o pipefail

echo "$(date) BEGIN AUTOPKG BUILD RUN"
for recipe in $(cd ${BUILD_RECIPE_DIR}; ls ); do
   OUTPUT_FILE=$(mktemp /tmp/${my_name}.XXXXXXXXX)
   echo "$(date) Autopkg running ${recipe} ... "
   /usr/local/bin/autopkg run ${recipe} | tee ${OUTPUT_FILE}
   if [ $? -ne 0 ]; then
       mail -s "Failed to build ${recipe}" ${EMAIL_ERRORS_TO} < ${OUTPUT_FILE}
   fi
   echo "$(date)  ... end run of $recipe"
   rm -f ${OUTPUT_FILE}
done
echo "$(date) END AUTOPKG BUILD RUN"

Relies on having a dir with files with the same name as recipes you want to run (we use symlinks to recipes/overrides in a separate dir so we can add/remove them easily from the build process)