從線採取的最後一個字，並在一開始使用bash

Question

我們有一個要求，在那裏我們的文本文件的內容是這樣的添加：

[some-section-1] 
big_msg_line1 var=random_value1 
big_msg_line2 var=random_value2 
big_msg_line3 var=random_value3 

[some-section-2] 
"lots of irrelevant data" 

[some-section-3] 
"lots of irrelevant data" 

[some-section-4] 
big_msg_line4 var=random_value4 
big_msg_line5 var=random_value5 
big_msg_line6 var=random_value6 
big_msg_line7 var=random_value7 
big_msg_line8 var=random_value8 

[some-section-5] 
"lots of irrelevant data" 

所有我們想要修改與共同啓動線charaters，就像在這個例子中，我們想修改啓動字「大」的所有行。我們想將其更改爲如下所示：

[some-section-1] 
random_value1 msg=big_msg_line1 
random_value2 msg=big_msg_line2 
random_value3 msg=big_msg_line3 

[some-section-2] 
"lots of irrelevant data" 

[some-section-3] 
"lots of irrelevant data" 

[some-section-4] 
random_value4 msg=big_msg_line4 
random_value5 msg=big_msg_line5 
random_value6 msg=big_msg_line6 
random_value7 msg=big_msg_line7 
random_value8 msg=big_msg_line8 

[some-section-5] 
"lots of irrelevant data" 

這些僅作爲示例。原始文件包含比這些更多的數據。如果不在數千行中，則爲數百。

我目前做這個使用一個循環，讀取每一行，切割值，格式化他們像我所希望的方式，在不同的文件中，然後放入，然後替換爲新文件中的原始文件。有沒有一種方法可以使用一些內襯來實現這一點？這真的很有幫助。希望我清楚我的問題。

在此先感謝。

Answer 1

從我瞭解的信，這AWK一個班輪將完成這項工作：

cat a 
[some-section-1] 
big_msg_line1 var=random_value1 
big_msg_line2 var=random_value2 
big_msg_line3 var=random_value3 

[some-section-2] 
lots of irrelevant data 

[some-section-3] 
lots of irrelevant data 

[some-section-4] 
big_msg_line4 var=random_value4 
big_msg_line5 var=random_value5 
big_msg_line6 var=random_value6 
big_msg_line7 var=random_value7 
big_msg_line8 var=random_value8 

[some-section-5] 
lots of irrelevant data 

此：

awk '{FS="var="; if ($1~/big/) { print $2"\tmsg="$1} else {print }}' a 

給人

[some-section-1] 
random_value1 msg=big_msg_line1 
random_value2 msg=big_msg_line2 
random_value3 msg=big_msg_line3 

[some-section-2] 
lots of irrelevant data 

[some-section-3] 
lots of irrelevant data 

[some-section-4] 
random_value4 msg=big_msg_line4 
random_value5 msg=big_msg_line5 
random_value6 msg=big_msg_line6 
random_value7 msg=big_msg_line7 
random_value8 msg=big_msg_line8 

[some-section-5] 
lots of irrelevant data 

Answer 2

這個命令應該做的工作

sed -e 's/\(big[^ ]*\)\([ ]*\)var=\([^ ]*\)/\3\2msg=\1/' [your file] > [output file] 

編輯：您可能需要將slahes（/）更改爲未在文件中使用