shell 语法很简单，楼主看看教程，半天就搞定了
http://www.runoob.com/linux/linux-shell.html

bash 语法大概这样：
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#!/bin/bash

echo -e '\n.......................Code Style Checking....................\n'

#the count of level, like ERROR,WARN
function get_level {
content=$1
level=$2
return grep -o "[$level]" "$content" | wc -l
}

jarpath=$(git config --get checkstyle.jar)
checkfilepath=$(git config --get checkstyle.checkfile)