updated

programs/init.lua

@@ -0,0 +1,97 @@
+-- init: bootstrap launcher.
+--
+-- Installed as startup.lua by the kernel. On boot it asks which program
+-- to fetch, downloads it via the kernel, rewrites startup.lua so that
+-- subsequent boots launch THAT program directly, then runs it.
+
+local BASE_URL = "https://git.astrocore.space/root/nova-corp/raw/branch/main/"
+
+local function fetch(path, dest)
+    if fs.exists(dest) then shell.execute("rm", dest) end
+    shell.execute("wget", BASE_URL .. path, dest)
+    sleep(1)
+end
+
+local function ensureKernel()
+    if not fs.exists("kernel.lua") then
+        fetch("kernel.lua", "kernel.lua")
+    end
+    return require("kernel")
+end
+
+local function writeProgramStartup(programName)
+    local src = ([[-- Auto-generated startup for "%s"
+local BASE_URL = "%s"
+
+local function fetch(path, dest)
+    if fs.exists(dest) then shell.execute("rm", dest) end
+    shell.execute("wget", BASE_URL .. path, dest)
+    sleep(1)
+end
+
+-- Always refresh kernel + program so code updates flow through.
+fetch("kernel.lua", "kernel.lua")
+local kernel = require("kernel")
+local program = kernel.addProgram("%s")
+
+if type(program) ~= "table" then
+    print("Program '%s' did not return a module table.")
+    return
+end
+
+if program.start then program.start() end
+if program.main then
+    program.main()
+else
+    print("Program '%s' has no main() function.")
+end
+]]):format(programName, BASE_URL, programName, programName, programName)
+
+    if fs.exists("startup.lua") then shell.execute("rm", "startup.lua") end
+    local f = fs.open("startup.lua", "w")
+    f.write(src)
+    f.close()
+end
+
+local function prompt()
+    term.clear()
+    term.setCursorPos(1, 1)
+    print("=== NovaCorp init ===")
+    print("Enter program name to install (from /programs):")
+    write("> ")
+    local name = read()
+    if not name or name == "" then
+        print("No program entered. Staying on init.")
+        return nil
+    end
+    return name
+end
+
+local function main()
+    local name = prompt()
+    if not name then return end
+
+    local kernel = ensureKernel()
+
+    print("Fetching program '" .. name .. "'...")
+    local ok, programOrErr = pcall(kernel.addProgram, name)
+    if not ok then
+        print("Failed to download program: " .. tostring(programOrErr))
+        print("Leaving init in place. Reboot to try again.")
+        return
+    end
+
+    print("Replacing startup.lua...")
+    writeProgramStartup(name)
+
+    print("Done. Launching '" .. name .. "' now.")
+    sleep(1)
+
+    local program = programOrErr
+    if type(program) == "table" then
+        if program.start then pcall(program.start) end
+        if program.main then pcall(program.main) end
+    end
+end
+
+main()