pelican 0.1.0

boot.lua

@@ -0,0 +1,106 @@
+-- Initialise global variables related to booting.
+_G._KERNEL_ROOT = "/"
+_G._KERNEL_LOCS = {}
+_G._BOOT_DEFAULT = nil
+_G._PELICAN_DEBUG = false
+_G._PELICAN_VERSION = "0.1.0"
+_G._PELICAN_CONFIG_LOCATION = ""
+
+print("Pelican " .. _G._PELICAN_VERSION)
+print("Searching for Pelican configuration.")
+local directories = {}
+directories[1] = "/"
+local x = 2
+local s = 1
+local v = true
+while v and _G._PELICAN_CONFIG_LOCATION == "" do
+    local files = fs.list(directories[s])
+    for i = 1, #files do
+        if fs.isDir(fs.combine(directories[s], files[i])) then
+            table.insert(directories, x, directories[s] .. files[i])
+            x = x + 1
+        elseif fs.getName(fs.combine(directories[s], files[i])) == "pelican.conf.lua" then
+            _G._PELICAN_CONFIG_LOCATION = fs.combine(directories[s], files[i])
+        end
+    end
+    table.remove(directories, s)
+    s = s + 1
+    if directories[s] == nil then
+        v = false
+    end
+end
+
+if _G._PELICAN_CONFIG_LOCATION ~= "" then
+    print("Found config at " .. _G._PELICAN_CONFIG_LOCATION .. ".")
+    dofile(_G._PELICAN_CONFIG_LOCATION)
+    print("Config applied!")
+else
+    print("No config found.")
+    if not _G._PELICAN_DEBUG then
+        term.clear()
+        term.setCursorPos(1, 1)
+    end
+end
+
+if #_G._KERNEL_LOCS ~= 0 and _G._BOOT_DEFAULT == nil then
+    print("")
+    if not _G._PELICAN_DEBUG then
+        term.clear()
+        term.setCursorPos(1, 1)
+    end
+    print("These kernels are available to boot to: ")
+    for i = 1, #_G._KERNEL_LOCS do
+        print(i.. ". " .. _G._KERNEL_LOCS[i])
+    end
+    print("To boot one of these kernels, type boot followed by the index number.")
+    print("Just type boot to boot kernel #1.")
+    print("")
+end
+
+local boot = false
+
+if _G._BOOT_DEFAULT ~= nil and _G._KERNEL_LOCS[_G._BOOT_DEFAULT] ~= nil then
+    boot = _G._KERNEL_LOCS[_G._BOOT_DEFAULT]
+end
+
+if not boot then    
+    print("No default kernel set. Dropping to shell.")
+
+    while not boot do
+        write("> ")
+        local cmd = read()
+        if cmd == "restart" or cmd == "reboot" then
+            os.reboot()
+        elseif cmd:find("^boot") and cmd ~= "boot" then
+            cmd = cmd:gsub("boot ", "")
+            if _G._KERNEL_LOCS[tonumber(cmd)] then
+                boot = _G._KERNEL_LOCS[tonumber(cmd)]
+            elseif fs.exists(cmd) then
+                boot = cmd
+            else
+                print("Please enter a valid kernel index number or kernel path.")
+            end
+        elseif cmd == "boot" then
+            if _G._KERNEL_LOCS[1] then
+                boot = _G._KERNEL_LOCS[1]
+            else
+                print("Please enter a kernel path.")
+            end
+        elseif cmd == "shutdown" or cmd == "poweroff" or cmd == "halt" then
+            os.shutdown()
+        elseif cmd == "help" then
+            print("shutdown - halts execution")
+            print("boot - executes a kernel")
+            print("restart - restarts computer")
+            print("help - prints help information")
+            print("version - prints version information")
+        elseif cmd == "version" then
+            print("Pelican boot loader version " .. _G._PELICAN_VERSION)
+            print("This software is licensed under the GNU General Public License.")
+            print("More information about this software can be found online at:")
+            print("https://git.colean.cc/canaryos/pelican")
+        end
+    end
+end
+
+dofile(boot)