turtl

turtos/main.lua

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+turtle.up()
+turtle.down()

turtos/startup.lua

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+_G._TOS_VER = "N/A"
+local tos_ver_fp = io.open("/.tos-ver", "r")
+if tos_ver_fp then
+    _G._TOS_VER = tos_ver_fp:read("l")
+    tos_ver_fp:close()
+end
+
+if fs.exists("/disk/update.json") then
+    local info_fp = io.open("/disk/update.json", "r")
+    local info = textutils.unserializeJSON(info_fp:read())
+    info_fp:close()
+    print("OTP version: " .. info.ver)
+    print("H/W version: " .. _TOS_VER)
+    if info.ver == _TOS_VER then
+        print("Running on latest firmware")
+    else
+        print("Performing an update...")
+        for i = 1, #info.files do
+            local file = info.files[i]
+            term.write(file.dst, "...")
+            if fs.exists(file.dst) then
+                term.write(" [DEL] ...")
+                fs.delete(file.dst)
+            end
+            fs.copy("/disk" .. file.src, file.dst)
+            print(" OK, copied from", file.src)
+        end
+        print("Writing new version info")
+        io.open("/.tos-ver", "w"):write(info.ver):close()
+        print("Rebooting")
+        return os.reboot()
+    end
+end
+
+shell.run("fg", "main.lua")

turtos/update.json

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+{
+  "ver": "0.0.1",
+  "files": [
+    { "src": "startup.lua", "dst": "/startup.lua" },
+    { "src": "main.lua", "dst": "/main.lua" }
+  ]
+}