Make stdout/stderr with color.

output_colorful.sh

#!/bin/bash

~/go_appengine/dev_appserver.py --port=8081 --admin_port=8001 --datastore_path=/tmp/myapp_datastore . 2>&1 | \
    awk '{ gsub("DEBUG", "\033[1;35m&\033[0m");
           gsub("INFO", "\033[1;36m&\033[0m");
           gsub("ERROR", "\033[1;31m&\033[0m");
           gsub("WARNING", "\033[1;33m&\033[0m");
           gsub("CRITICAL", "\033[1;31m&\033[0m");
           print
    }'