I am writing an awk statement, and need to hold a variable for use until that variable is updated.

Sample data and file - *actual is medical data so can not post

GCAR101 red fast leather
1 3.2 l engine
2 black tires
3 tinted windows
cTrr-02 green slow leather
1 1.4 l enging
2rust
4tR34-1 blue fast no leather
1 no rust

I am trying to create an awk command that will hold a pattern $0 if the length($1)=7, and then put that variable in front of each individual description. Variable should update at each new 7 length first field

Should look like this:

GCAR101 red fast leather ; 1 3.2 l engine
GCAR101 red fast leather ; 2 black tires
GCAR101 red fast leather ; 3 tinted windows
cTrr-02 green slow leather ; 1 1.4 l enging
cTrr-02 green slow leather ; 2 rust
4tR34-1 blue fast no leather ; 1 no rust

Anyone have a suggestion? Trying to a void a loop with test statements as the file is quite large.

Thanks in advance.

Andy

One error in pre-data. There is a space after each numbered row. I see a few that I forgot to add the space.

Andy

My actual command:

nawk '{if (length($1)==7); i==$1} { if (length($1)!=7) print i, $0}' OFS=';' $MOD.3 > $MOD.4

Andy