fix(ota): make update scripts self-updating and add cache-busting to installers

update_machine.lua

@@ -1,7 +1,13 @@
-local URL_MACHINE = "https://gitea.fse-media.group/Henry_Du/FSE-Ticket.sys/raw/branch/main/ticketmachine.lua"
+local URL_MACHINE = "http://gitea.fse-media.group/Henry_Du/FSE-Ticket.sys/raw/branch/main/ticketmachine.lua"
+local URL_UPDATE_MACHINE = "http://gitea.fse-media.group/Henry_Du/FSE-Ticket.sys/raw/branch/main/update_machine.lua"
 local args = { ... }
 local silent = AUTO_UPDATE_SILENT == true or args[1] == "--silent"
 
+local function getCacheBustedUrl(url)
+  local sep = url:find("?") and "&" or "?"
+  return url .. sep .. "_t=" .. tostring(os.epoch and os.epoch("utc") or math.random(1, 999999))
+end
+
 local function log(msg)
   if not silent then
     print(msg)
@@ -69,7 +75,7 @@ if not silent then
 end
 log("Downloading ticket machine program...")
 
-local ok, code = httpGet(URL_MACHINE)
+local ok, code = httpGet(getCacheBustedUrl(URL_MACHINE))
 if not ok or type(code) ~= "string" or #code == 0 then
   error("Download failed: " .. tostring(code or ""))
 end
@@ -80,6 +86,12 @@ end
 atomicWrite("startup", code, false)
 if fs.exists("ticketmachine.lua") then atomicWrite("ticketmachine.lua", code, false) end
 
+log("Downloading updater program...")
+local okUp, codeUp = httpGet(getCacheBustedUrl(URL_UPDATE_MACHINE))
+if okUp and type(codeUp) == "string" and #codeUp > 0 then
+  atomicWrite("update_machine.lua", codeUp, false)
+end
+
 if not silent then
   log("")
   log("Done.")