请教一个脚本的编写，可能用sed和awk比较好

basten54188

现有一个文件aa，其内容如下：
.........................................
Patch0:a.patch
Patch1:c.patch
.........................................
现要在最后一个Patch开头的行后添加一行b.patch
添加后文件aa的内容为
.........................................
Patch0:a.patch
Patch1:c.patch
Patch2:b.patch
.........................................

其中Patch2:b.patch中的Patch2是自动生成的！意思就是若原文件是
.........................................
Patch0:a.patch
.........................................
则添加后为
.........................................
Patch0:a.patch
Patch1:b.patch
.........................................

kiron

2. #!/bin/bash
4. die()
5. {
6.     echo $1;
7.     exit -1;
8. }
10. [ "$#" != 2 ] && die "Usage : $0 <filename> patch_name"
12. no=$(tail -1 $1|awk -F: '{print gensub(/Patch/,"", 1, $1)}')
13. let "no++"
15. echo Patch${no}:$2 >> $1

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lxmxn

1. gawk '$0 !~ /^$/ {a=substr($0,6,1);print $0}END{print "Patch"a+1":b.patch"}' aa>dfile

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