I am trying to look through a text file and return 1 if the file contains the string "attach" on a line that doesn't start with >. Otherwise return 0

gistfile1.txt

#test case - should return a 0
#> asdf asdfkla sdfaklsd fasd lfaslk fa 
#> asdlfka sdfkl asdfkl asflka sflkasjd flkasdjf
#> askldfj asdlfk asdlfk asdlf kasdk lfas dlkfasdf

#>attach aslkdfjasdfl asdf asldkf asd

#asdfkljas d

#test case - should return a 1
#fakdjfksjf attach
#>dkjfakjf dkfdjaf

text = IO.read(ARGV[0])

if text =~ /^>.*(?=.*)attach/
  exit 1
else
	exit
end