Retract post process

retract-fix.rb

#!/usr/bin/env ruby
#filepath = "/home/user/whatever.gcode"

#chmod +x this file
# ./thisfile.rb "/file/path.here" > "/new/file.path"
filepath = ARGV[0].to_s
puts filepath

IO.write(filepath, File.open(filepath) {|f| f.read.gsub(/G1 E-1.*\nG0/, "G1 E-1")})

previous_line = ""

File.foreach(filepath) do |line|
    if line.match(/^G1 E-/)

      puts line.gsub(/F\d\d\d\d/, "F3500")
    else
      puts line
    end
    previous_line = line
end