TLCO fix & boot file extension change (#37)

This commit fixes the TLCO boot option (which hasn't been working for a
while now), and also changes boot file extensions from .boot to .lua.

startup.lua

@@ -29,9 +29,10 @@ local function loadBootOptions()
 			preload = { },
 			menu = {
 				{ prompt = os.version() },
-				{ prompt = 'Opus'         , args = { '/sys/boot/opus.boot' } },
+				{ prompt = 'Opus'         , args = { '/sys/boot/opus.lua' } },
-				{ prompt = 'Opus Shell'   , args = { '/sys/boot/opus.boot', 'sys/apps/shell.lua' } },
+				{ prompt = 'Opus Shell'   , args = { '/sys/boot/opus.lua', '/sys/apps/shell.lua' } },
-				{ prompt = 'Opus Kiosk'   , args = { '/sys/boot/kiosk.boot' } },
+				{ prompt = 'Opus Kiosk'   , args = { '/sys/boot/kiosk.lua' } },
+				{ prompt = 'Opus TLCO'    , args = { '/sys/boot/tlco.lua' } },
 			},
 		}))
 		f.close()
@@ -41,6 +42,20 @@ local function loadBootOptions()
 	local options = textutils.unserialize(f.readAll())
 	f.close()
 
+	-- Backwards compatibility for .startup.boot files created before sys/boot files' extensions were changed
+	local changed = false
+	for _, item in pairs(options.menu) do
+		if item.args and item.args[1]:match("/?sys/boot/%l+%.boot") then
+			item.args[1] = item.args[1]:gsub("%.boot", "%.lua")
+			changed = true
+		end
+	end
+	if changed then 
+		local f = fs.open(".startup.boot", "w")
+		f.write(textutils.serialize(options))
+		f.close()
+	end
+
 	return options
 end
 

sys/boot/tlco.boot

@@ -1,15 +0,0 @@
-local pullEvent = os.pullEventRaw
-local shutdown = os.shutdown
-
-os.pullEventRaw = function()
-	error('')
-end
-
-os.shutdown = function()
-	os.pullEventRaw = pullEvent
-	os.shutdown = shutdown
-
-	os.run(getfenv(1), 'sys/boot/opus.boot')
-end
-
-os.queueEvent('modem_message')

sys/boot/tlco.lua

@@ -0,0 +1,30 @@
+local run = os.run
+local shutdown = os.shutdown
+
+local args = {...} -- keep the args so that they can be passed to opus.lua
+
+os.run = function() 
+	os.run = run
+end
+
+os.shutdown = function()
+	os.shutdown = shutdown
+
+	_ENV.multishell = nil -- prevent sys/apps/shell.lua erroring for odd reasons
+
+	local success, err = pcall(function()
+		run(_ENV, 'sys/boot/opus.lua', table.unpack(args))
+	end)
+	term.redirect(term.native())
+	if success then
+		print("Opus OS abruptly stopped.")
+	else
+		printError("Opus OS errored.")
+		printError(err)
+	end
+	print("Press any key to continue.")
+	os.pullEvent("key")
+	shutdown()
+end
+
+shell.exit()