Question

假设我有两个文件。如何执行以下操作，即将标记的部分从一个文件复制到另一个文件的某个位置？一些sed命令会完成这项工作吗？什么是最实用的方法？

文件＃1：

This paragraph does not belong to the poem.

{ begin passage #1 }

When from a place he run away,
He never at the place did stay;
And while he run, as I am told,
He never stood still for young or old.

He often squeaked, and sometimes violent,
And when he squeaked he never was silent.
Though never instructed by a cat,
He knew a mouse was not a rat.

{ end passage #1 }

This as well does not.

文件＃2：

There was a little guinea pig,
Who being little, was not big;
He always walked upon his feet,
And never fasted when he eat.

{ input passage #1 file #1 }

One day, as I am certified,
He took a whim, and fairly died;
And as I am told by men of sense,
He never has been living since.

我想将文件＃1中的段落插入到给定标记的文件＃2中。感谢帮助和想法！

Answer 1

正如您所说的那样，＃34;最实用的方式是什么？＃我使用shell脚本将sed和awk混合在一起，将整个事物粘合在一起。

尝试仅使用sed解决此问题可能是可能的，但不值得花时间去解决这个问题。

几乎可以肯定会有进一步的优化，但我已经尝试编写你能理解的代码，而不是单行代码;-)。

#!/bin/ksh

sed -n '/^{ begin passage/,/^{ end passage /p' file_1 | sed '/^{/d' > /tmp/$$.segment

awk -v segFile="/tmp/$$.segment" '{
  if ($0 ~ /^{ input passage/) {
    while (getline < segFile > 0 ) {
      print $0
    }
  next
  }
  else {
    print $0
  }
}'  file_2

rm /tmp/$$.segment

<强>输出

There was a little guinea pig,
Who being little, was not big;
He always walked upon his feet,
And never fasted when he eat.


When from a place he run away,
He never at the place did stay;
And while he run, as I am told,
He never stood still for young or old.

He often squeaked, and sometimes violent,
And when he squeaked he never was silent.
Though never instructed by a cat,
He knew a mouse was not a rat.


One day, as I am certified,
He took a whim, and fairly died;
And as I am told by men of sense,
He never has been living since.

如果需要，您可以将#!/bin/ksh更改为#!/bin/bash。

您可以对输出进行后置过滤以消除重复的空行，但不清楚您的最终需求是什么。

IHTH

Answer 2

这可能适合你（GNU sed）：

sed -n '/{ begin/,/{ end/!b;//!p' file1 | sed -e '/{ input/r /dev/stdin' -e '//d' file2

过滤来自file1的行并将它们插入到file2中。第一个sed命令的stdout成为第二个sed命令的stdin文件。第二个sed调用需要两个sed命令，因为r命令必须以换行符（或新的-e sed命令）结束。第二个sed命令删除插入第一个文件中的行的行。

将分组的文本行复制并粘贴到另一个文件中的优雅方法

2 个答案: