log-filter.awk

BEGIN {  print"strict digraph G {\n";x = 0}
END { print "}" }
/SGN_DBG/ { if (x > 0) print ";"; x = 1;  }
/^\[/ && !/SGN_DBG/ { if (x > 0) print ";";  x = 0; }
{
  if (x > 0) {
    if($0 ~ /SGN_DBG/)
      print "\""$5 $9"\"";
    else if ($0 ~ / from /) {
      sub(/\"/, "")
      sub(/\/home\/user\//, "")
      sub(/vendor\/bundle\/ruby\/2\.2\.0\//, "gems_path")
      print "-> \""$2 $3"\"";
    }
  }
}