应用发新版一段时间后遇到点小问题，需要对比下新旧版本目录里文件，（＞人＜；）打扰我疯狂星期四

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#!/bin/bash

if [ $# != 3 ] ; then
    echo -e "# 对比2个目录，把dir2下比dir2下不同的文件（新建或不一致）的，全部保存到dir3"
    echo "USAGE: $0 dir1 dir2 bakdir"
    exit 1;
fi

dir1=`cd $1 && pwd`
dir2=`cd $2 && pwd`
mkdir -p $3
dir3=`cd $3 && pwd`

echo '============================================'
echo "src dir:" $dir1
echo "dst dir:" $dir2
echo "bak dir:" $dir3
echo '============================================'

cd $dir2

# 对比两个目录都存在的文件内容
for i in `diff -qr ${dir1} ${dir2}  egrep "^Files.*differ$"  sed 's/^Files .* and \(.*\) differ$/\1/'`
do 
    #echo $i
    echo ${i#${dir2}/}  xargs -i cp --parents {} ${dir3}
done

# 对比两个目录不存在的文件或目录
for j in `diff -qr ${dir1} ${dir2}  awk '/^Only/ {sub(/:/,"/",$3);print $3$4}'  egrep "^${dir2}.*"`
do
    echo ${j#${dir2}/}  xargs -i cp -r --parents {} ${dir3}
done

测试了下可行，然后发给他，正好他也在疯狂星期四，V了我个🍗