史上最全的正则表达式多行匹配例子 from karlzheng@csdn

https://blog.csdn.net/ZhengKarl/article/details/8121266

经常碰到想查找多行匹配的时候，比如：有一份log如下：

commit 0b79912f43f110f64f60aba1244c71c4b0656b4c
Author: xxx <xxx@758d13f7-6a34-8146-8d86-37c7f849097d>
Date:   Mon Oct 22 09:26:30 2012 +0000
    usb输出更多的调试信息
commit e1d14cca93a417327d78a40a2787cb137ef8ef1d
Author: zhengkl <zhengkl@758d13f7-6a34-8146-8d86-37c7f849097d>
Date:   Mon Oct 22 08:58:04 2012 +0000
    修改modem hsic_net_data_handler处理函数
commit e02c4740435cd4cbbd1ee7e31b513ffcb03ea906
Author: xxx <xxx@758d13f7-6a34-8146-8d86-37c7f849097d>
Date:   Mon Oct 22 07:45:02 2012 +0000
    lcd add gamma_setting version 1 for ID code 0x1h.

想实现git log –author zhengkl的功能，使用脚本如下：

• vim脚本：

  func! MyFindEndLine(linenr)
    let l:buf_end_line = line('$')
    let l:line = a:linenr
    while l:line <= l:buf_end_line
        let l:line += 1
        let l:line_buf = getline(l:line)
        if matchstr(l:line_buf, "^commit") != ""
            return (l:line - 1)
        en
    endw
    return l:buf_end_line
  endf
  func! MyFindTextBlockFunc(string)
    let g:mylist = []
    exec "g /".a:string."/call add(g:mylist, line('.'))"
    let l:text = []
    for i in g:mylist
        let l:end_line = MyFindEndLine(i)
        call extend(l:text,  getline(i - 1, l:end_line))
        call writefile(l:text, "test.txt")
    endfo
  endf
  :call MyFindTextBlockFunc("zhengkl")
  

• awk脚本：

  #!/bin/awk -f
  {
    is_end_file = 1
    if (match($0, "commit")) {
        a = $0
        do {
            is_end_file = !getline
            if (match($0, "zhengkl")) {
                print a
                print $0
                is_end_file = !getline
                while (! match($0, "commit")) {
                    print $0
                    is_end_file = getline
                    a = $0
                }
            } else {
                is_end_file = !getline
                a =$0
            }
        } while(is_end_file != 1);
    }
  }
  

• sed脚本：

  /^commit/ {
        : get_commit
        h
        n
        /zhengkl/ {
                H
                x
                p
                : readagain
                n
                /^commit/ {
                    b get_commit
                }
                p
                b readagain
        }
  }
  

• 当然最方便的还是vim命令：

g/zhengkl/-1;,/commit/-1 write >> test.txt

Ref:

• https://blog.csdn.net/ZhengKarl/article/details/8121266