Awk script to delete some block pattern

I have the following file with a lot of entries:

[…]

edit "ip_address_1"
    set uuid 8b6d9bd0-9fe7-51ee-d54d-d904bfc9a7e1
    set associated-interface "interface1"
    set subnet 10.0.0.1 255.255.255.255
next
edit "ip_address_2"
    set uuid a3465e68-9fe7-51ee-cf95-96b35ab0532e
    set associated-interface "interface1"
    set subnet 10.0.0.2 255.255.255.255
next
edit "ip_address_3"
    set uuid c1b62e20-9fef-51ee-5915-14502d40552e
    set associated-interface "interface2"
    set subnet 10.0.0.3 255.255.255.255
next

I’d like to use an awk script to delete all blocks which don’t contain

set associated-interface "interface1"

so the final result should be

edit "ip_address_1"
    set uuid 8b6d9bd0-9fe7-51ee-d54d-d904bfc9a7e1
    set associated-interface "interface1"
    set subnet 10.0.0.1 255.255.255.255
next
edit "ip_address_2"
    set uuid a3465e68-9fe7-51ee-cf95-96b35ab0532e
    set associated-interface "interface1"
    set subnet 10.0.0.2 255.255.255.255
next

I tried something like this

awk  '/edit/, /next/ {if ($0 ~ /set associated interface1/) {print $0}}'  address.fgt

but the output contains only the lines with:

set associated interface1
set associated interface1

instead I’d like to have the all block.
Any hints?

>Solution :

You may use this gnu-awk solution:

awk -v RS='\nnext\n' '{ORS = RT} /set associated-interface "interface1"/' file

edit "ip_address_1"
    set uuid 8b6d9bd0-9fe7-51ee-d54d-d904bfc9a7e1
    set associated-interface "interface1"
    set subnet 10.0.0.1 255.255.255.255
next
edit "ip_address_2"
    set uuid a3465e68-9fe7-51ee-cf95-96b35ab0532e
    set associated-interface "interface1"
    set subnet 10.0.0.2 255.255.255.255
next

Details:

• RS='\nnext\n' sets input record separator to next wrapped with line break on both sides
• ORS = RT: Sets output record separator same as the input record separator
• /set associated-interface "interface1"/ prints each record that contain this substring

2nd Solution (works in any awk version):

awk '/^edit / {
   rec = 1
   s = $0
   next
}
rec {
   s = s ORS $0
}
/^next/ {
   if (s ~ /set associated-interface "interface1"/)
      print s
   rec = 0
}' file

edit "ip_address_1"
    set uuid 8b6d9bd0-9fe7-51ee-d54d-d904bfc9a7e1
    set associated-interface "interface1"
    set subnet 10.0.0.1 255.255.255.255
next
edit "ip_address_2"
    set uuid a3465e68-9fe7-51ee-cf95-96b35ab0532e
    set associated-interface "interface1"
    set subnet 10.0.0.2 255.255.255.255
next

Online Working Demo