Split a kjot text export into multiple files

split.awk

/^###/ { header=1 }
/^# / && header {
    if (/^# Page/) {
      page=substr($0, 8)
    } else {
      if (page) {
        page=""
        dir=substr($0, 3)
      } else {
        dir=dir "/" substr($0, 3)
      }
    }
    fn=dir "/" page
    if (fn in v) {
      v[fn]=v[fn] + (fn in v)
      fn=v[fn] "/" fn
    } else {
      v[fn]=0
    }
    gsub("/","_",fn)
  }
!/^###/ && fn && page && !/^# Page/ { header=0; print > fn }
BEGIN { page="_" }