Devtools initial commit

.gitignore

@@ -65,3 +65,7 @@ drafts/
 
 # Luau tools
 profile.*
+
+# Patch files
+
+*.patch

.luaurc

@@ -2,7 +2,8 @@
     "aliases": {
         "jecs": "jecs",
         "testkit": "test/testkit",
-        "mirror": "mirror"
+        "mirror": "mirror",
+        "tools": "tools"
     },
     "languageMode": "strict"
 }

benches/visual/despawn.bench.luau

@@ -5,41 +5,60 @@ local ReplicatedStorage = game:GetService("ReplicatedStorage")
 local Matter = require(ReplicatedStorage.DevPackages.Matter)
 local ecr = require(ReplicatedStorage.DevPackages.ecr)
 local jecs = require(ReplicatedStorage.Lib)
+local pair = jecs.pair
 local newWorld = Matter.World.new()
 local ecs = jecs.World.new()
+local mirror = require(ReplicatedStorage.mirror)
+local mcs = mirror.World.new()
 
-local A, B = Matter.component(), Matter.component()
-local C, D = ecs:component(), ecs:component()
+local C1 = ecs:component()
+local C2 = ecs:entity()
+ecs:add(C2, pair(jecs.OnDeleteTarget, jecs.Delete))
+local C3 = ecs:entity()
+ecs:add(C3, pair(jecs.OnDeleteTarget, jecs.Delete))
+local C4 = ecs:entity()
+ecs:add(C4, pair(jecs.OnDeleteTarget, jecs.Delete))
+local E1 = mcs:component()
+local E2 = mcs:entity()
+mcs:add(E2, pair(jecs.OnDeleteTarget, jecs.Delete))
+local E3 = mcs:entity()
+mcs:add(E3, pair(jecs.OnDeleteTarget, jecs.Delete))
+local E4 = mcs:entity()
+mcs:add(E4, pair(jecs.OnDeleteTarget, jecs.Delete))
+
+local registry2 = ecr.registry()
 
 return {
 	ParameterGenerator = function()
-		local matter_entities = {}
-		local jecs_entities = {}
-		local entities = {
-			matter = matter_entities,
-			jecs = jecs_entities,
-		}
+		local j = ecs:entity()
+		ecs:set(j, C1, true)
+		local m = mcs:entity()
+		mcs:set(m, E1, true)
 		for i = 1, 1000 do
-			table.insert(matter_entities, newWorld:spawn(A(), B()))
-			local e = ecs:entity()
-			ecs:set(e, C, {})
-			ecs:set(e, D, {})
-			table.insert(jecs_entities, e)
+			local friend1 = ecs:entity()
+			local friend2 = mcs:entity()
+
+			ecs:add(friend1, pair(C2, j))
+			ecs:add(friend1, pair(C3, j))
+			ecs:add(friend1, pair(C4, j))
+
+			mcs:add(friend2, pair(E2, m))
+			mcs:add(friend2, pair(E3, m))
+			mcs:add(friend2, pair(E4, m))
 		end
-		return entities
+		return {
+			m = m,
+			j = j,
+		}
 	end,
 
 	Functions = {
-		Matter = function(_, entities)
-			for _, entity in entities.matter do
-				newWorld:despawn(entity)
-			end
+		Mirror = function(_, a)
+			mcs:delete(a.m)
 		end,
 
-		Jecs = function(_, entities)
-			for _, entity in entities.jecs do
-				ecs:delete(entity)
-			end
+		Jecs = function(_, a)
+			ecs:delete(a.j)
 		end,
 	},
 }

demo/src/ReplicatedStorage/track.luau

@@ -0,0 +1,48 @@
+local events = {}
+
+local function trackers_invoke(event, component, entity, ...)
+	local trackers = events[event][component]
+	if not trackers then
+		return
+	end
+
+	for _, tracker in trackers do
+		tracker(entity, data)
+	end
+end
+
+local function trackers_init(event, component, fn)
+	local ob = events[event]
+
+	return {
+		connect = function(component, fn)
+			local trackers = ob[component]
+			if not trackers then
+				trackers = {}
+				ob[component] = trackers
+			end
+
+			table.insert(trackers, fn)
+		end,
+		invoke = function(component, ...)
+			trackers_invoke(event, component, ...)
+		end
+	}
+	return function(component, fn)
+		local trackers = ob[component]
+		if not trackers then
+			trackers = {}
+			ob[component] = trackers
+		end
+
+		table.insert(trackers, fn)
+	end
+end
+
+local trackers = {
+	emplace = trackers_init("emplace"),
+	add = trackers_init("added"),
+	remove = trackers_init("removed")
+}
+
+return trackers

test/devtools_test.luau

@@ -0,0 +1,20 @@
+local jecs = require("@jecs")
+local lifetime_tracker_add = require("@tools/lifetime_tracker")
+local world = lifetime_tracker_add(jecs.world())
+world:print_snapshot()
+local e = world:entity()
+local e1 = world:entity()
+world:delete(e)
+
+world:print_snapshot()
+local e2 = world:entity()
+local e3 = world:entity()
+world:print_snapshot()
+world:delete(e1)
+world:delete(e2)
+world:delete(e3)
+world:print_snapshot()
+world:print_entities()
+world:entity()
+world:entity()
+world:print_snapshot()

tools/lifetime_tracker.luau

@@ -0,0 +1,193 @@
+local jecs = require("@jecs")
+local ECS_GENERATION = jecs.ECS_GENERATION
+local ECS_ID = jecs.ECS_ID
+local __ = jecs.Wildcard
+local pair = jecs.pair
+
+local testkit = require("@testkit")
+local BENCH, START = testkit.benchmark()
+
+local it = testkit.test()
+local TEST, CASE = it.TEST, it.CASE
+local CHECK, FINISH = it.CHECK, it.FINISH
+local SKIP, FOCUS = it.SKIP, it.FOCUS
+local CHECK_EXPECT_ERR = it.CHECK_EXPECT_ERR
+
+
+local c = {
+	white_underline = function(s: any)
+		return `\27[1;4m{s}\27[0m`
+	end,
+
+	white = function(s: any)
+		return `\27[37;1m{s}\27[0m`
+	end,
+
+	green = function(s: any)
+		return `\27[32;1m{s}\27[0m`
+	end,
+
+	red = function(s: any)
+		return `\27[31;1m{s}\27[0m`
+	end,
+
+	yellow = function(s: any)
+		return `\27[33;1m{s}\27[0m`
+	end,
+
+	red_highlight = function(s: any)
+		return `\27[41;1;30m{s}\27[0m`
+	end,
+
+	green_highlight = function(s: any)
+		return `\27[42;1;30m{s}\27[0m`
+	end,
+
+	gray = function(s: any)
+		return `\27[30;1m{s}\27[0m`
+	end,
+}
+
+local function pe(e: any)
+	local gen = ECS_GENERATION(e)
+	return c.green(`e{ECS_ID(e)}`)..c.yellow(`v{gen}`)
+end
+
+function print_centered_entity(entity, width: number)
+    local entity_str = tostring(entity)
+    local entity_length = #entity_str
+
+    -- Calculate total padding needed to center the string
+    local padding_total = width - 2 - entity_length  -- Subtract 2 for the `| |` characters
+
+    -- Calculate padding for the left and right
+    local padding_left = math.floor(padding_total / 2)
+    local padding_right = padding_total - padding_left
+
+    -- Build the centered string
+    local centered_str = string.rep(" ", padding_left) .. entity_str .. string.rep(" ", padding_right)
+
+    -- Print with pipes around the centered string
+    print("|" .. centered_str .. "|")
+end
+
+local function lifetime_tracker_add(world: jecs.World)
+	local entity_index = world.entity_index
+	local dense_array = entity_index.dense_array
+	local world_delete = world.delete
+	local world_entity = world.entity
+	local component_index = world.component_index
+
+	local ENTITY_RANGE = (jecs.Rest :: any) + 1
+
+	local w = setmetatable({}, { __index = world })
+	w.delete = function(self, e)
+		print("Entity deleted:", e)
+
+		for child in world:each(pair(__, e)) do
+
+		end
+		return world_delete(world, e)
+	end
+	w.entity = function(self)
+		local e = world_entity(world)
+		print("Entity created:", pe(e))
+		return e
+	end
+	w.print_entities = function(self)
+		local max_id = entity_index.max_id
+		local alive_count = entity_index.alive_count
+		local alive = table.move(dense_array, 1+jecs.Rest::any, alive_count, 1, {})
+		local dead = table.move(dense_array, alive_count + 1, max_id, 1, {})
+
+		local sep = "|--------|"
+		print("|-alive--|")
+		for i = 1, #alive do
+			local e = pe(alive[i])
+			print_centered_entity(e, 32)
+			print(sep)
+		end
+		print("\n")
+		print("|--dead--|")
+		for i = 1, #dead do
+			print_centered_entity(pe(dead[i]), 32)
+			print(sep)
+		end
+	end
+	local timelines = {}
+	w.print_snapshot = function(self)
+		local timeline = #timelines + 1
+		local entity_column_width = 10
+		local status_column_width = 8
+
+		local header = string.format("| %-" .. entity_column_width .. "s |", "Entity")
+		for i = 1, timeline do
+			header = header .. string.format(" %-" .. status_column_width .. "s |", string.format("T%d", i))
+		end
+
+		local max_id = entity_index.max_id
+		local alive_count = entity_index.alive_count
+		local alive = table.move(dense_array, 1+jecs.Rest::any, alive_count, 1, {})
+		local dead = table.move(dense_array, alive_count + 1, max_id, 1, {})
+
+		local data = {}
+		print("-------------------------------------------------------------------")
+		print(header)
+
+		-- Store the snapshot data for this timeline
+		for i = ENTITY_RANGE, max_id do
+			if dense_array[i] then
+				local entity = dense_array[i]
+				local id = ECS_ID(entity)
+				local status = "alive"
+				if id > alive_count then
+					status = "dead"
+				end
+				data[id] = status
+			end
+		end
+
+		table.insert(timelines, data)
+
+		-- Create a table to hold entity data for sorting
+		local entities = {}
+		for i = ENTITY_RANGE, max_id do
+			if dense_array[i] then
+				local entity = dense_array[i]
+				local id = ECS_ID(entity)
+				-- Push entity and id into the new `entities` table
+				table.insert(entities, {entity = entity, id = id})
+			end
+		end
+
+		-- Sort the entities by ECS_ID
+		table.sort(entities, function(a, b)
+			return a.id < b.id
+		end)
+
+		-- Print the sorted rows
+		for _, entity_data in ipairs(entities) do
+			local entity = entity_data.entity
+			local id = entity_data.id
+			local status = "alive"
+			if id > alive_count then
+				status = "dead"
+			end
+			local row = string.format("| %-" .. entity_column_width .. "s     |", pe(entity))
+			for j = 1, timeline do
+				local timeline_data = timelines[j]
+				local entity_data = timeline_data[id]
+				if entity_data then
+					row = row .. string.format(" %-" .. status_column_width .. "s |", entity_data)
+				else
+					row = row .. string.format(" %-" .. status_column_width .. "s |", "-")
+				end
+			end
+			print(row)
+		end
+		print("-------------------------------------------------------------------")
+	end
+	return w
+end
+
+return lifetime_tracker_add