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https://github.com/sbrl/Minetest-WorldEditAdditions.git
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core: tidy up new safe_function implementation; bugfix
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commit
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3 changed files with 57 additions and 27 deletions
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@ -2,10 +2,10 @@
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-- @module worldeditadditions_core
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-- WARNING: safe_region MUST NOT be imported more than once, as it defines chat commands. If you want to import it again elsewhere, check first that multiple dofile() calls don't execute a file more than once.
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local wea_c = worldeditadditions_core
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local safe_region = dofile(wea_c.modpath.."/core/safe_region.lua")
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local human_size = wea_c.format.human_size
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local safe_function = wea_c.safe_function
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local weac = worldeditadditions_core
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local safe_region = dofile(weac.modpath.."/core/safe_region.lua")
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local human_size = weac.format.human_size
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local safe_function = weac.safe_function
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-- TODO: Reimplement worldedit.player_notify(player_name, msg_text)
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@ -18,11 +18,17 @@ local safe_function = wea_c.safe_function
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-- @param tbl_event table Internal event table used when calling `worldeditadditions_core.emit(event_name, tbl_event)`.
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-- @returns nil
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local function run_command_stage2(player_name, func, parse_result, tbl_event)
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wea_c:emit("pre-execute", tbl_event)
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local success, result_message = func(player_name, wea_c.table.unpack(parse_result))
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weac:emit("pre-execute", tbl_event)
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local success_safefn, retvals = safe_function(func, { player_name, weac.table.unpack(parse_result) }, player_name, "The function crashed during execution.", tbl_event.cmdname)
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if not success_safefn then return false end
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if #retvals ~= 2 then
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worldedit.player_notify(player_name, "[//"..tostring(tbl_event.cmdname).."] The main execution function for this chat command returned "..tostring(#retvals).." arguments instead of the expected 2 (success, message), so it is unclear whether it succeeded or not. This is a bug!")
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end
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local success, result_message = retvals[1], retvals[2]
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print("DEBUG:run_command_stage2 SUCCESS", success, "RESULT_MESSAGE", result_message)
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if not success then
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result_message = "[//"..tostring(tbl_event.cmdname).."] "..result_message
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end
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@ -32,7 +38,7 @@ local function run_command_stage2(player_name, func, parse_result, tbl_event)
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end
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tbl_event.success = success
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tbl_event.result = result_message
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wea_c:emit("post-execute", tbl_event)
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weac:emit("post-execute", tbl_event)
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end
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@ -92,15 +98,15 @@ end
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-- @param player_name string The name of the player to execute the command for.
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-- @param paramtext string The unparsed argument string to pass to the command when executing it.
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local function run_command(cmdname, options, player_name, paramtext)
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if options.require_pos > 0 and not worldedit.pos1[player_name] and not wea_c.pos.get1(player_name) then
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if options.require_pos > 0 and not worldedit.pos1[player_name] and not weac.pos.get1(player_name) then
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worldedit.player_notify(player_name, "Error: pos1 must be selected to use this command.")
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return false
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end
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if options.require_pos > 1 and not worldedit.pos2[player_name] and not wea_c.pos.get2(player_name) then
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if options.require_pos > 1 and not worldedit.pos2[player_name] and not weac.pos.get2(player_name) then
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worldedit.player_notify(player_name, "Error: Both pos1 and pos2 must be selected (together making a region) to use this command.")
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return false
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end
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local pos_count = wea_c.pos.count(player_name)
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local pos_count = weac.pos.count(player_name)
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if options.require_pos > 2 and pos_count < options.require_pos then
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worldedit.player_notify(player_name, "Error: At least "..options.require_pos.."positions must be defined to use this command, but you only have "..pos_count.." defined (try using the multiwand).")
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return false
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@ -113,37 +119,52 @@ local function run_command(cmdname, options, player_name, paramtext)
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player_name = player_name
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}
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wea_c:emit("pre-parse", tbl_event)
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weac:emit("pre-parse", tbl_event)
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-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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-- local did_error = false
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local success_safefn, success, parse_result = safe_function(options.parse, { paramtext }, player_name, "The command crashed when parsing the arguments.", cmdname)
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local success_safefn, parse_result = safe_function(options.parse, { paramtext }, player_name, "The command crashed when parsing the arguments.", cmdname)
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if not success_safefn then return false end -- error already sent to the player above
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print("DEBUG:run_command success_safefn", success_safefn, "success", success, "parse_result", parse_result)
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if not success then
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worldedit.player_notify(player_name, ("[//"..tostring(cmdname).."] "..tostring(parse_result[1])) or "Invalid usage (no further error message was provided by the command. This is probably a bug.)")
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if #parse_result == 0 then
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worldedit.player_notify(player_name, "[//"..tostring(cmdname).."] No return values at all were returned by the parsing function - not even a success boolean. This is a bug - please report it :D")
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return false
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end
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local success = table.remove(parse_result, 1)
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if not success then
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worldedit.player_notify(player_name, "[//"..tostring(cmdname).."] "..(tostring(parse_result[1]) or "Invalid usage (no further error message was provided by the command. This is probably a bug.)"))
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return false
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end
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-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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tbl_event.paramargs = parse_result
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wea_c:emit("post-parse", tbl_event)
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weac:emit("post-parse", tbl_event)
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if options.nodes_needed then
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local potential_changes = options.nodes_needed(player_name, wea_c.table.unpack(parse_result))
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local success_xpcall_nn, retvals_nn = safe_function(options.nodes_needed, { player_name, weac.table.unpack(parse_result) }, player_name, "The nodes_needed function crashed!", cmdname)
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if not success_xpcall_nn then return false end
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if #retvals_nn == 0 then
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worldedit.player_notify(player_name, "[//"..tostring(cmdname).."] Error: The nodes_needed function didn't return any values. This is a bug!")
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return false
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end
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local potential_changes = retvals_nn[1]
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tbl_event.potential_changes = potential_changes
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wea_c:emit("post-nodesneeded", tbl_event)
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weac:emit("post-nodesneeded", tbl_event)
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if type(potential_changes) ~= "number" then
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worldedit.player_notify(player_name, "Error: The command '"..cmdname.."' returned a "..type(potential_changes).." instead of a number when asked how many nodes might be changed. Abort. This is a bug.")
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return
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end
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local limit = wea_c.safe_region_limit_default
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if wea_c.safe_region_limits[player_name] then
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limit = wea_c.safe_region_limits[player_name]
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local limit = weac.safe_region_limit_default
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if weac.safe_region_limits[player_name] then
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limit = weac.safe_region_limits[player_name]
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end
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if type(potential_changes) == "string" then
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worldedit.player_notify(player_name, "/"..cmdname.." "..paramtext.." "..potential_changes..". Type //y to continue, or //n to cancel (in this specific situation, your configured limit via the //saferegion command does not apply).")
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@ -69,7 +69,7 @@ end
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-- @param string|nil player_name The name of the player affected. If nil then no message is sent to the player.
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-- @param string error_msg The error message to send when `fn` inevitably crashes.
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-- @param string|nil cmdname Optional. The name of the command being run.
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-- @returns bool,any,... A success bool (true == success), and then if success == true the rest of the arguments are the (unpacked) return values from the function called.
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-- @returns bool,any,... A success bool (true == success), and then if success == true the rest of the arguments are the (unpacked) return values from the function called. If success == false, then the 2nd argument will be the stack trace.
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function safe_function(fn, args, player_name, error_msg, cmdname)
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local retvals
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local success_xpcall, stack_trace = xpcall(function()
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@ -78,10 +78,20 @@ function safe_function(fn, args, player_name, error_msg, cmdname)
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if not success_xpcall then
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send_error(player_name, cmdname, error_msg, stack_trace)
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return false
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weac:emit("error", {
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fn = fn,
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args = args,
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player_name = player_name,
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cmdname = cmdname,
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stack_trace = stack_trace,
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error_msg = error_msg
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})
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return false, stack_trace
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end
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return true, weac.table.unpack(retvals)
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minetest.log("error", "[//"..tostring(cmdname).."] Caught error from running function ", fn, "with args", weac.inspect(args), "for player ", player_name, "with provided error message", error_msg, ". Stack trace: ", stack_trace)
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return true, retvals
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end
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@ -10,7 +10,6 @@
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-- TODO this doesn't work. It replaces \n with %A instead of %0A, though we don't know if that's a problem or not
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-- it also doesn't handle quotes even though we've clearly got them in the Lua pattern
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local function _escape_char(char)
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print("_escape_char char", char, "result", string.format('%%%02X', string.byte(char)))
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return string.format('%%%02X', string.byte(char))
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end
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