linux - 如何在文本/模式的前两个实例之间获取单词？

Question

输入:

===================================
v2.0.0

Added feature 3
Added feature 4
===================================
v1.0.0

Added feature 1
Added feature 2
===================================

我想要的输出:

v2.0.0

Added feature 3
Added feature 4

我试过了 this但它得到第一个等于(=)和最后等于(=)而我想得到的是前两个等于(=)

Answer 1

这是 awk 中的一个:

$ awk '/^=+$/{f=!f;if(f==1)next;else if(f==0)exit}f' file
v2.0.0

Added feature 3
Added feature 4

漂亮的字体:

$ awk '/^=+$/ {     # at ===...
    f=!f            # flag state is flipped
    if(f==1)        # if its one (first ===...)
        next        # next record
    else if(f==0)   # if zero (second ===...)
        exit        # nothing more to do yeah
}
f' file             # print