From 888b0ebfec8c2eff9015163549a7e47443cb8665 Mon Sep 17 00:00:00 2001
From: Vanessa Ezekowitz <vanessaezekowitz@gmail.com>
Date: Fri, 1 Apr 2016 21:00:20 -0400
Subject: "explode" all modpacks into their individual components (you can't
 have a modpack buried inside a modpack)

---
 worldedit/code.lua | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 worldedit/code.lua

(limited to 'worldedit/code.lua')

diff --git a/worldedit/code.lua b/worldedit/code.lua
new file mode 100644
index 0000000..a939deb
--- /dev/null
+++ b/worldedit/code.lua
@@ -0,0 +1,52 @@
+--- Lua code execution functions.
+-- @module worldedit.code
+
+--- Executes `code` as a Lua chunk in the global namespace.
+-- @return An error message if the code fails, or nil on success.
+function worldedit.lua(code)
+	local func, err = loadstring(code)
+	if not func then  -- Syntax error
+		return err
+	end
+	local good, err = pcall(func)
+	if not good then  -- Runtime error
+		return err
+	end
+	return nil
+end
+
+
+--- Executes `code` as a Lua chunk in the global namespace with the variable
+-- pos available, for each node in a region defined by positions `pos1` and
+-- `pos2`.
+-- @return An error message if the code fails, or nil on success.
+function worldedit.luatransform(pos1, pos2, code)
+	pos1, pos2 = worldedit.sort_pos(pos1, pos2)
+
+	local factory, err = loadstring("return function(pos) " .. code .. " end")
+	if not factory then  -- Syntax error
+		return err
+	end
+	local func = factory()
+
+	worldedit.keep_loaded(pos1, pos2)
+
+	local pos = {x=pos1.x, y=0, z=0}
+	while pos.x <= pos2.x do
+		pos.y = pos1.y
+		while pos.y <= pos2.y do
+			pos.z = pos1.z
+			while pos.z <= pos2.z do
+				local good, err = pcall(func, pos)
+				if not good then -- Runtime error
+					return err
+				end
+				pos.z = pos.z + 1
+			end
+			pos.y = pos.y + 1
+		end
+		pos.x = pos.x + 1
+	end
+	return nil
+end
+
-- 
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