improve startup, dont rely on debug (cbor)

startup.lua

@@ -1,14 +1,48 @@
+--[[
+	.startup.boot
+		delay
+			description:	delays amount before starting the default selection
+			default:		1.5
+
+		preload
+			description :	runs before menu is displayed, can be used for password
+							locking, drive encryption, etc.
+			example :		{ [1] = '/path/somefile.lua', [2] = 'path2/another.lua' }
+
+		menu
+			description:	array of menu entries (see .startup.boot for examples)
+]]
+
 local colors   = _G.colors
 local os       = _G.os
 local settings = _G.settings
 local term     = _G.term
 
-local bootOptions = {
+local function loadBootOptions()
+	if not fs.exists('.startup.boot') then
+		local f = fs.open('.startup.boot', 'w')
+		f.write(textutils.serialize({
+			delay = 1.5,
+			preload = { },
+			menu = {
 				{ prompt = os.version() },
 				{ prompt = 'Opus'         , args = { '/sys/boot/opus.boot' } },
 				{ prompt = 'Opus Shell'   , args = { '/sys/boot/opus.boot', 'sys/apps/shell.lua' } },
 				{ prompt = 'Opus Kiosk'   , args = { '/sys/boot/kiosk.boot' } },
-}
+			},
+		}))
+		f.close()
+	end
+
+	local f = fs.open('.startup.boot', 'r')
+	local options = textutils.unserialize(f.readAll())
+	f.close()
+
+	return options
+end
+
+local bootOptions = loadBootOptions()
+
 local bootOption = 2
 if settings then
 	settings.load('.settings')
@@ -17,69 +51,63 @@ end
 
 local function startupMenu()
 	local x, y = term.getSize()
-	local align, selected = 0, 1
+	local align, selected = 0, bootOption
+
 	local function redraw()
 		local title = "Boot Options:"
 		term.clear()
 		term.setTextColor(colors.white)
-		term.setCursorPos((x/2)-(#title/2), (y/2)-(#bootOptions/2)-1)
+		term.setCursorPos((x/2)-(#title/2), (y/2)-(#bootOptions.menu/2)-1)
 		term.write(title)
-		for i = 1, #bootOptions do
+		for i, item in pairs(bootOptions.menu) do
-			local txt = i..". "..bootOptions[i].prompt
+			local txt = i .. ". " .. item.prompt
-			term.setCursorPos((x/2)-(align/2), (y/2)-(#bootOptions/2)+i)
+			term.setCursorPos((x/2)-(align/2), (y/2)-(#bootOptions.menu/2)+i)
 			term.write(txt)
 		end
 	end
 
-	for i = 1, #bootOptions do
+	for _, item in pairs(bootOptions.menu) do
-		if (bootOptions[i].prompt):len() > align then
+		if #item.prompt > align then
-			align = (bootOptions[i].prompt):len()
+			align = #item.prompt
 		end
 	end
 
 	redraw()
-	repeat
+	while true do
-		term.setCursorPos((x/2)-(align/2)-2, (y/2)-(#bootOptions/2)+selected)
+		term.setCursorPos((x/2)-(align/2)-2, (y/2)-(#bootOptions.menu/2)+selected)
-		if term.isColor() then
+		term.setTextColor(term.isColor() and colors.yellow or colors.lightGray)
-			term.setTextColor(colors.yellow)
+
-		else
-			term.setTextColor(colors.lightGray)
-		end
 		term.write(">")
-		local k = ({os.pullEvent()})
+		local event, key = os.pullEvent()
-		if k[1] == "mouse_scroll" then
+		if event == "mouse_scroll" then
-			if k[2] == 1 then 
+			key = key == 1 and keys.down or keys.up
-				k = keys.down
+		elseif event == 'key_up' then
-			else
+			key = nil  -- only process key events
-				k = keys.up
 		end
-		elseif k[1] == "key" then
+
-			k = k[2]
+		if key == keys.enter or key == keys.right then
-		else
-			k = nil
-		end
-		if k then
-			if k == keys.enter or k == keys.right then
 			return selected
-			elseif k == keys.down then 
+		elseif key == keys.down then 
-				if selected == #bootOptions then 
+			if selected == #bootOptions.menu then 
 				selected = 0 
 			end
-				selected = selected+1 
+			selected = selected + 1
-			elseif k == keys.up then 
+		elseif key == keys.up then 
 			if selected == 1 then 
-					selected = #bootOptions+1 
+				selected = #bootOptions.menu + 1 
 			end
-				selected = selected-1 
+			selected = selected - 1
-			elseif k >= keys.one and k <= #bootOptions+1 and k < keys.zero then 
+		elseif event == 'char' then
-				selected = k-1
+			key = tonumber(key) or 0
-				return selected
+			if bootOptions.menu[key] then 
+				return key
 			end
+		end
+
 		local cx, cy = term.getCursorPos()
 		term.setCursorPos(cx-1, cy)
 		term.write(" ")
 	end
-	until true == false
 end
 
 local function splash()
@@ -120,13 +148,17 @@ end
 term.clear()
 splash()
 
-local timerId = os.startTimer(1.5)
+for _, v in pairs(bootOptions.preload) do
+	os.run(_ENV, v)
+end
+
+local timerId = os.startTimer(bootOptions.delay)
 while true do
 	local e, id = os.pullEvent()
 	if e == 'timer' and id == timerId then
 		break
 	end
-	if e == 'char' then
+	if e == 'char' or e == 'key' then
 		bootOption = startupMenu()
 		if settings then
 			settings.set('opus.boot_option', bootOption)
@@ -138,9 +170,9 @@ end
 
 term.clear()
 term.setCursorPos(1, 1)
-if bootOptions[bootOption].args then
+if bootOptions.menu[bootOption].args then
-	os.run(_ENV, table.unpack(bootOptions[bootOption].args))
+	os.run(_ENV, table.unpack(bootOptions.menu[bootOption].args))
 else
-	print(bootOptions[bootOption].prompt)
+	print(bootOptions.menu[bootOption].prompt)
 end
 

sys/modules/opus/cbor.lua

@@ -14,7 +14,7 @@ end
 
 local setmetatable = setmetatable;
 local getmetatable = getmetatable;
-local dbg_getmetatable = debug.getmetatable;
+local dbg_getmetatable = debug and debug.getmetatable;
 local assert = assert;
 local error = error;
 local type = type;