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使用最近的搜索模式更改文本块

perl regex

Carsten · 技术社区 · 10 月前

我想搜索并替换一个文本块:

按开始模式和结束模式查找
复制&;通过更改结束模式粘贴找到的块。

我试过了 perl -0777 -pe 's/(section:[\s\S]*?"MARKER")/\$1 =~ s/"MARKER"/"NEW MARKER"/gr/e' input.txt (我知道,它没有按预期工作)

对答案感到好奇:-)

我的文本文件是这样的:

Some content ...
  - section:
    this is some text
    this is some more text
    value: "MARKER"
  - another section:
    this is some text
    this is some more text
    value: "M7"
  - section:
    this is some text
    this is some more text
    value: "MARKER"
... content goes on

我想搜索一个街区,在哪里

以“-section:”开头
“-section:”后面跟着“value:”MARKER“”

发现的块应为副本和;其背后贴着“MARKER”,被“NEW MARKER“取代。

结果如下:

Some content ...
  - section:
    this is some text
    this is some more text
    value: "MARKER"
  - section:
    this is some text
    this is some more text
    value: "NEW MARKER"
  - another section:
    this is some text
    this is some more text
    value: "M7"
  - section:
    this is some text
    this is some more text
    value: "MARKER"
  - section:
    this is some text
    this is some more text
    value: "NEW MARKER"
... content goes on

2 回复 | 直到 10 月前

jhnc 10 月前

您的代码是:

perl -0777 -pe 's/(section:[\s\S]*?"MARKER")/\$1 =~ s/"MARKER"/"NEW MARKER"/gr/e' input.txt

这似乎是在尝试嵌套替换。

与 /e 标志,RHS是实际代码,所以 $ 不应逃避:

perl -0777 -pe 's/(section:[\s\S]*?"MARKER")/$1 =~ s/"MARKER"/"NEW MARKER"/gr/e' input.txt

相反,嵌套的分隔符 s/// 必须逃脱(或不同):

perl -0777 -pe 's/(section:[\s\S]*?"MARKER")/$1 =~ s\/"MARKER"\/"NEW MARKER"\/gr/e' input.txt

然而,这将“第…节营销人员”替换为“新营销人员”,这似乎不是人们想要的。

相反,直接使用捕获组更简单:

perl -0777 -pe 's/(section:[\s\S]*?)"MARKER"/$1"NEW MARKER"/g' input.txt

或使用环视:

perl -0777 -pe 's/section:[\s\S]*?\K"MARKER"/"NEW MARKER"/g' input.txt

Carsten 10 月前

非常感谢您提供示例和解释! 最后,我将这样使用它:

perl -0777 -pe 's/(- section:[\s\S]*?)"MARKER"/$1"MARKER"\n$1"NEW MARKER 2"\n$1"NEW MARKER 3"/g' input.txt

我的目标是找到第一个块,并用不同的块复制它 value: "MARKER" .

太好了!

最终结果:

Some content ...
- section:
this is some text
this is some more text
value: "MARKER"
- section:
this is some text
this is some more text
value: "NEW MARKER 2"
- section:
this is some text
this is some more text
value: "NEW MARKER 3"
- another section:
this is some text
this is some more text
value: "M7"
- section:
this is some text
this is some more text
value: "MARKER"
- section:
this is some text
this is some more text
value: "NEW MARKER 2"
- section:
this is some text
this is some more text
value: "NEW MARKER 3"
... content goes on