A basic example showing the concept of callback functions in bash.

bash_callback.sh

migrate_module() {
    echo -e "\nRunning migration for module $1"
    protected/yiic migrate --migrationPath=application.modules.$1.migrations
}


loop_modules() {
    for file in `ls $MODULE_PATH`; do
        if [ -d "$MODULE_PATH/$file" ] && [[ $file =~ ^$MODULE_REGEX ]]; then
            $1 "$file"
        fi
    done
}

loop_modules migrate_module