mtcontrib/Minetest-WorldEdit
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Merge pull request #53 from ShadowNinja/fix-lua-runtime-error

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Fix runtime error checking with lua* commands
This commit is contained in:
Anthony Zhang 2014-07-24 11:19:13 -04:00
commit 44c9576f8a
2 changed files with 29 additions and 21 deletions
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46
worldedit/code.lua
View File

@ -1,7 +1,9 @@
worldedit = worldedit or {}
local minetest = minetest --local copy of global
local minetest = minetest -- local copy of global
--modifies positions `pos1` and `pos2` so that each component of `pos1` is less than or equal to its corresponding conent of `pos2`, returning two new positions
-- Copies and modifies positions `pos1` and `pos2` so that each component of
-- `pos1` is less than or equal to the corresponding component of `pos2`.
-- Returns the new positions.
worldedit.sort_pos = function(pos1, pos2)
pos1 = {x=pos1.x, y=pos1.y, z=pos1.z}
pos2 = {x=pos2.x, y=pos2.y, z=pos2.z}
@ -17,30 +19,33 @@ worldedit.sort_pos = function(pos1, pos2)
return pos1, pos2
end
--executes `code` as a Lua chunk in the global namespace, returning an error if the code fails or nil otherwise
-- Executes `code` as a Lua chunk in the global namespace,
-- returning an error if the code fails, or nil otherwise.
worldedit.lua = function(code)
local operation, message = loadstring(code)
if operation == nil then --code parsing failed
return message
local func, err = loadstring(code)
if not func then -- Syntax error
return err
end
local status, message = pcall(operation)
if status == nil then --operation failed
return message
local good, err = pcall(operation)
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`, returning an error if the code fails or nil otherwise
-- 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`, returning an error if the code fails, or nil otherwise
worldedit.luatransform = function(pos1, pos2, code)
local pos1, pos2 = worldedit.sort_pos(pos1, pos2)
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
local factory, message = loadstring("return function(pos) " .. code .. " end")
if factory == nil then --code parsing failed
return message
local factory, err = loadstring("return function(pos) " .. code .. " end")
if not factory then -- Syntax error
return err
end
local operation = factory()
local func = factory()
--make area stay loaded
-- Keep area loaded
local manip = minetest.get_voxel_manip()
manip:read_from_map(pos1, pos2)
@ -50,9 +55,9 @@ worldedit.luatransform = function(pos1, pos2, code)
while pos.y <= pos2.y do
pos.z = pos1.z
while pos.z <= pos2.z do
local status, message = pcall(operation, pos)
if status == nil then --operation failed
return message
local good, err = pcall(func, pos)
if not good then -- Runtime error
return err
end
pos.z = pos.z + 1
end
@ -61,4 +66,5 @@ worldedit.luatransform = function(pos1, pos2, code)
pos.x = pos.x + 1
end
return nil
end
end

4
worldedit/manipulations.lua
View File

@ -1,7 +1,9 @@
worldedit = worldedit or {}
local minetest = minetest --local copy of global
--modifies positions `pos1` and `pos2` so that each component of `pos1` is less than or equal to its corresponding conent of `pos2`, returning two new positions
-- Copies and modifies positions `pos1` and `pos2` so that each component of
-- `pos1` is less than or equal to the corresponding component of `pos2`.
-- Returns the new positions.
worldedit.sort_pos = function(pos1, pos2)
pos1 = {x=pos1.x, y=pos1.y, z=pos1.z}
pos2 = {x=pos2.x, y=pos2.y, z=pos2.z}