regex - 如何使用 Regex 在列表中第一次出现的每个匹配项周围添加 `\macro{}`

Question

我有一个单词列表，list.txt，像这样:

fish
squirrel
bird
tree
mountain

我还有一个文件，text.txt，里面有这样的段落:

The fish ate the birds.
The squirrel lived in the tree on the mountain.
The fish did not like eating squirrels as they lived too high in the trees.

我需要用 TeX 代码标记 text.txt 文件中 list.txt 中所有单词的第一次出现，例如 \macro{}，例如，输出将如下所示:

The \macro{fish} ate the \macro{bird}s.
The \macro{squirrel} lived in the \macro{tree}house on the \macro{mountain}.
The fish did not like eating squirrels as they lived too high in the trees.

如何将 \macro{} 添加到 BASH 列表中出现的每个单词的第一次出现处？

Answer 1

GNU 代码 sed :

$ sed -nr 's#(\w+)#s/\1/\1/;T\1;x;s/\1/\1/;x;t\1;x;s/.*/\& \1/;x;s/\1/\\\\macro\{\1\}/;:\1;$!N#p' list.txt|sed -rf - text.txt

$ cat list.txtfishsquirrelbirdtreemountain$ cat text.txtThe fish ate the birds.The squirrel lived in the tree on the mountain.The fish did not like eating squirrels as they lived too high in the trees.$ sed -nr 's#(\w+)#s/\1/\1/;T\1;x;s/\1/\1/;x;t\1;x;s/.*/\& \1/;x;s/\1/\\\\macro\{\1\}/;:\1;$!N#p' list.txt|sed -rf - text.txtThe \macro{fish} ate the \macro{bird}s.The \macro{squirrel} lived in the \macro{tree} on the \macro{mountain}.The fish did not like eating squirrels as they lived too high in the trees.