OT: sed/awk pointers needed

[Craig Treleaven]

tl;dr version:
How do I transform a listing like this:

$ port variants php53-mysql php54-mysql |grep -v conflicts |grep -e 
mariadb -e mysql -e percona | cut -d : -f 1
php53-mysql has the variants
    mariadb
    mysql4
    mysql5
    mysql51
    mysql55
    mysql56
[+]mysqlnd
    percona
php54-mysql has the variants
    mariadb
    mysql4
    mysql5
    mysql51
    mysql55
    mysql56
[+]mysqlnd
    percona

into:

php53-mysql   mariadb N
php53-mysql   mysql4 N
php53-mysql   mysql5 N
php53-mysql   mysql51 N
php53-mysql   mysql55 N
php53-mysql   mysql56 N
php53-mysql   mysqlnd Default
php53-mysql   percona N
php54-mysql   mariadb N
php54-mysql   mysql4 N
php54-mysql   mysql5 N
php54-mysql   mysql51 N
php54-mysql   mysql55 N
php54-mysql   mysql56 N
php54-mysql   mysqlnd Default
php54-mysql   percona N


I have only rudimentary acquaintance with sed and less with awk.  I'd 
like to learn more and this seemed like an opportunity to do so. 
 From some reading [1], I think sed's Hold buffer is the way to 
extract the port name and insert it onto the line with each of the 
variants.  But the tutorial only uses the hold buffer for full lines; 
not just, say, the first word of the line.  Is this possible?  How 
does one do that?

[1] http://www.grymoire.com/Unix/Sed.html#uh-52

Or maybe I'm barking up the wrong tree?  Is there another 
tool/technique that is better suited?

Thanks in advance,

Craig