From aeae1244f4c38779b43b5ac0b2ed1aa0b60d3183 Mon Sep 17 00:00:00 2001
From: Vexatos <Vexatos@users.noreply.github.com>
Date: Sun, 13 Jul 2014 20:00:15 +0200
Subject: [PATCH] Update go.lua

---
 .../lua/component/robot/bin/go.lua            | 46 ++++++++++++++-----
 1 file changed, 35 insertions(+), 11 deletions(-)

diff --git a/src/main/resources/assets/opencomputers/lua/component/robot/bin/go.lua b/src/main/resources/assets/opencomputers/lua/component/robot/bin/go.lua
index 86f8df29a..d8513bbde 100644
--- a/src/main/resources/assets/opencomputers/lua/component/robot/bin/go.lua
+++ b/src/main/resources/assets/opencomputers/lua/component/robot/bin/go.lua
@@ -1,23 +1,47 @@
+--[[ go, makes the robot go a specified number of blocks in a certain direction or turn around.
+Author: Vexatos
+]]
 local robot=require("robot")
 local shell=require("shell")
 local args = shell.parse(...)
 if #args<1 then
-  io.stderr:write("No direction specified\n")
+  print("'go' - Makes the robot go in a certain direction")
+  print("Usage:")
+  print("'go forward [number]' to make the robot go forward a number of blocks (defaults to 1)")
+  print("'go back [number]' to make the robot go backwards")
+  print("'go up [number]' to make the robot go upwards")
+  print("'go down [number]' to make the robot go downwards")
+  print("'go left [number]' to make the robot turn left a number of times")
+  print("'go right [number]' to make the robot turn right a number of times")
   return
 end
+local distance = args[2] or 1
+
+if not tonumber(distance) or tonumber(distance) <= 0 then
+  io.stderr:write(distance..": not a positive number!\n")
+  return
+end
+
+distance = math.floor(tonumber(distance))
+local action
+
 if args[1] == "forward" then
-  robot.forward()
+  action = robot.forward
 elseif args[1] == "back" then
-  robot.back()
-elseif args[1]=="left" then
-  robot.turnLeft()
-elseif args[1]=="right" then
-  robot.turnRight()
-elseif args[1]=="up" then
-  robot.up()
-elseif args[1]=="down" then
-  robot.down()
+  action = robot.back
+elseif args[1] == "left" then
+  action = robot.turnLeft
+elseif args[1] == "right" then
+  action = robot.turnRight
+elseif args[1] == "up" then
+  action = robot.up
+elseif args[1] == "down" then
+  action = robot.down
 else
   io.stderr:write(args[1]..": not a valid direction!\n")
   return
 end
+
+for i = 1,distance do
+  action()
+end