如何在一個文件結束後停止diff？

Question

我比較了兩個文件的長度不同，但我不想在更短的文件結束後看到較長文件的輸出。 雖然我確實需要知道在較短文件結束之前是否有任何文件中有缺少的行。

我不必使用差異，我可能會使用python來做到這一點，有沒有一種簡單的方法來做同樣的python？

Answer 1

看是否有此解決方案適用於您：

dhruvpathak@dhruvpathak:~$ cat shortfile 
this is a 
short file 
created 
for example 
dhruvpathak@dhruvpathak:~$ cat longfile 
this is a 
long file 
created 
for example. 
but also contains 
some extra text 
which needs to be 
ignored when 
the small file 
ends. 

dhruvpathak@dhruvpathak:~$ cat shortfile > /tmp/a && echo "*****ENDMARKER*****" >> /tmp/a && cat longfile > /tmp/b && diff /tmp/a /tmp/b | grep -B 100000 "*****ENDMARKER*****" 
2c2 
< short file 
--- 
> long file 
4,5c4,10 
< for example 
< *****ENDMARKER*****