linux - How to transform tree in text format with nesting levels designated by numbers -

i'd appreciate advice on how transform (preferably bash) text file, foobar.txt, stores information directory structure in following format:

1 qwe

2 rty

1 uio

1 asd

2 fgh

3 jkl

2 zxc

the first digit of every line designates nesting level (7 largest value). need create corresponding directory tree on disk. command «xargs -a foobar.txt mkdir -p» create tree, content of foobar.txt has like:

./qwe/rty

./uio

./asd/fgh/jkl

./asd/zxc

here's way awk. print desired directories:

awk '{dir[$1]=$2; for( in dir ) { if( i<=$1 ) { if( i==1 ) printf("."); printf("/%s", dir[i]); }} printf("\n"); }' text_file 

and of course, can tack on mkdir after create them:

awk '{dir[$1]=$2; for( in dir ) { if( i<=$1 ) { if( i==1 ) printf("."); printf("/%s", dir[i]); }} printf("\n"); }' text_file | xargs mkdir -p