idk even anymore

tools/migrate_legacy_room.lua

@@ -0,0 +1,43 @@
+-- Convert a pre-flat-schema room save into the current { objects = { ... } }
+-- format.  Usage:
+--   lua tools/migrate_legacy_room.lua legacy.sav migrated.sav
+
+local inputPath, outputPath = arg[1], arg[2]
+assert(inputPath and outputPath, "usage: lua tools/migrate_legacy_room.lua legacy.sav migrated.sav")
+
+local input = assert(io.open(inputPath, "r"))
+local chunk, err = load("return " .. input:read("*a"))
+input:close()
+assert(chunk, err)
+local legacy = chunk()
+
+local objects = {}
+local function append(class, object, includeColor)
+	local converted = {
+		class = class,
+		x = object.x,
+		y = object.y,
+	}
+	if includeColor ~= false then converted.color = object.color end
+	table.insert(objects, converted)
+end
+
+for _, color in ipairs({ "red", "green", "blue" }) do
+	for _, object in ipairs(legacy.players[color] or {}) do append("player", object) end
+	-- Doors are shared between color layers in the current schema, so they have
+	-- no color field when serialized.
+	for _, object in ipairs(legacy.doors[color] or {}) do append("door", object, false) end
+	for _, object in ipairs(legacy.static_walls[color] or {}) do append("static_wall", object) end
+	-- The legacy wall sprite was renamed to box when assets became data-driven.
+	for _, object in ipairs(legacy.walls[color] or {}) do append("box", object) end
+	for _, object in ipairs(legacy.switches[color] or {}) do append("switch", object) end
+end
+
+for _, sage in pairs(legacy.sages or {}) do
+	table.insert(objects, { class = "npc", x = sage.x, y = sage.y })
+end
+
+require "libs/TSerial"
+local output = assert(io.open(outputPath, "w"))
+output:write(TSerial.pack({ objects = objects }, nil, true))
+output:close()