linux - 如何删除关键字之前及其匹配字符串标记之前的行

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Delete only fully formed line ranges from a text file while ignoring those that only have a start delimiter
                                
                                    （4个答案）
                                
                        
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我有一个像这样的文件：

Sample text1 <TAG> some text
Line1
Line2
<INSERT>
Sample text3 <TAG> some text
Line3
<DELETE>
Sample text4 <TAG> some text
Line4
Line5
<INSERT>
Sample text5 <TAG> some text
Line6
<DELETE>

我想删除DELETE之前和TAG之前的行，以便它看起来像这样：

Sample text1 <TAG> some text
Line1
Line2
<INSERT>
Sample text4 <TAG> some text
Line4
Line5
<INSERT>

最佳答案

在awk中使用我在注释中提到的先前解决方案：

$ cat foo.awk
/TAG/ { printf "%s", b; b="" }                       # at START output buffer and empty it
{ b=b $0 ORS }                                       # gather buffer
/DELETE/ { b="" }                                    # at empty buffer at END also

运行：

$ awk -f foo.awk foo2
Sample text1 <TAG> some text
Line1
Line2
<INSERT>
Sample text4 <TAG> some text
Line4
Line5
<INSERT>

关于linux - 如何删除关键字之前及其匹配字符串标记之前的行，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/40300548/