reg_inp.rb

test_data = <<eof
do not match this line
match this as event 1
  and this a as 1
  and this b as 1
do not match this line
match this as event 2
 and this x as 2
 and this y as 2
 and this z as 2
but do not match this
eof

def next_match(data, i)
  a = data.match(/^match.+$/, i)
  return unless a  # no more data
  b = data.match(/^\S/, a.end(0))

  last = b ? b.begin(0) : data.length

  lines = data[(a.end(0) + 1)...last].lines

  puts "Match line: #{a}"
  puts "Lines starting with a space: #{lines}"

  # returns the next index
  puts last
  last
end