text - 将分组的文本行复制并粘贴到另一个文件中的优雅方法

Question

假设我有两个文件。如何执行以下操作，即将一个文件中的标记部分复制到另一个文件的某个位置？某些 sed 命令可以完成这项工作吗？最实用的方法是什么？

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.

我希望将文件 #1 中的段落插入到文件 #2 的给定标记处。感谢帮助和想法!

Answer 1

当您问“最实用的方法是什么”时，我的回答是使用 shell 脚本将 sed 和 awk 混合在一起，将整个过程粘合在一起。

尝试仅使用 sed 来解决这个问题可能是可能的，但不值得花时间去弄清楚。

几乎肯定可以进行进一步的优化，但我尝试编写您可以理解的代码，而不是一行代码;-)。

#!/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

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过滤以消除重复的空白行，但尚不清楚您的最终需求是什么。

IHTH