如何在文件中搜索多行模式？ [英] How can I search for a multiline pattern in a file?

问题描述

我需要找到包含特定字符串模式的所有文件。第一个解决方案是使用 管道输入 xargs grep ：

I needed to find all the files that contained a specific string pattern. The first solution that comes to mind is using find piped with xargs grep:

find . -iname '*.py' | xargs grep -e 'YOUR_PATTERN'

但是如果我需要找到跨越多行的模式，因为vanilla grep找不到多行模式。

But if I need to find patterns that spans on more than one line, I'm stuck because vanilla grep can't find multiline patterns.

推荐答案

所以我发现了 pcregrep 代表 Perl Compatible Regular Expressions GREP

例如，您需要查找 _name 变量紧跟其后的' _description 'variable：

For example, you need to find files where the '_name' variable is immediatelly followed by the '_description' variable:

find . -iname '*.py' | xargs pcregrep -M '_name.*\n.*_description'

提示：在您的模式中的换行符。根据您的平台，它可以是'\\\
'，\r'，'\r\\\
'，...

Tip: you need to include the line break character in your pattern. Depending on your platform, it could be '\n', \r', '\r\n', ...

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