How to print the content between two brackets.
For example:
return [ "server1.domain.com" ,
"server2.domain.com" ,
"server3.domain.com" ]
Expected result:
"server1.domain.com" ,
"server2.domain.com" ,
"server3.domain.com"
How to get the expected result?
With pcregrep:
pcregrep -Mo 'return \[\K[^]]*'
Multiline match on return [ followed by a sequence of non-] characters but only output the part to Keep (to the right of \K).
pcregrep is one of many grep implementations. Some other grep implementations like some versions of GNU grep will also work there if you replace the pcregrep -Mo with grep -zPo and pipe the output to tr '\0' '\n'
With sed
sed '
/.*\[ /{
s/// #remove all upto open square bracket
:a #return mark
/\ ].*/!{
N #get next line untill there is close square bracket
ba #back to return mark
}
s/// #remove all from close square bracket to end of line
}
'
