sxwos by Sxw1212

oldPull=os.pullEvent
os.pullEvent=os.pullEventRaw
function bboot(p)
if chroot then
chroot.chroot(p)
end
end
function run(p)
os.pullEvent=oldPull
print("Running "..p)
dofile(p)
end
os.loadAPI("/chroot")
bootd={"/boot","/disk/boot","/net/","/sxwos"}

function clear()
    x,y=term.getSize()
    term.clear()
    term.setCursorPos(1,1)
    write("+")

    for i=1,x-3 do
        write("-")
    end

    write("+")
    term.setCursorPos(1,2)

    for i=1,y-2 do
        print("|")
    end
    write("+")

    for i=1,x-3 do
        write("-")
    end
    write("+")

    for i=1,y-2 do
        term.setCursorPos(x-1,i+1)
        write("|")
    end
    term.setCursorPos(2,2)
end

function l()
    x,y=term.getCursorPos()
    term.setCursorPos(2,y+1)
end

function menu()
    clear()
    write("Hello! Welcome to SxwGRUB! Please wait...")
    sleep(1)
    l()

    write("Scanning for boot files...")
    bf,bd=scanboot()

    if not bd then
        l()
        write("Oh noe! No boot file detected.")
        l()
        write("Please insert a boot disk and install an os.")
        sleep(5)
        os.shutdown()
    else
        clear()
        if #bf==1 then
            write(bf[1].." selected. Booting...")
            sleep(1)
            bboot(bf[1])
            if chroot then
                run("/boot.lua")
            else
                run(bf[1].."/boot.lua")
            end
            clear()
            write("SxwGrub Unloaded. Goodbye!")
            sleep(1)
        end
        write("Detected boot files, press the number to boot:")
        local i=1
        for k,v in ipairs(bf) do
            l()
            write("["..i.."] "..v)
            i=1+1
        end
        while true do
            ev,t=os.pullEvent("char")
            if bf[tonumber(t)] then
                l()
                write(bf[tonumber(t)].." selected. Booting...")
                sleep(1)
                term.clear()
                term.setCursorPos(1,1)
                sleep(1)
                bboot(bf[tonumber(t)])
                if chroot then
                    run("boot.lua")
                else
                    run(bf[tonumber(t)].."/boot.lua")
                end
                clear()
                write("SxwGrub Unloaded. Goodbye!")
                sleep(1)
                os.shutdown()
            end
        end
    end
end

function scanboot()
    local bf={}
    local i=1
    for k,v in ipairs(bootd) do
        if scan(v) then
            l()
            bd=true
            write("["..i.."] Boot file detected at "..v.."bios.lua")
            bf[i]=v
            i=i+1
        end
    end
    return bf,bd
end

function scan(dir)
    l()
    write("Scanning "..dir)
    r=fs.open(dir.."/boot.lua","r")
    if r then
        r.close()
        return true
    end
end

if os.loadAPI("/cmdx") then
    nosdk="sxwbootKILL"
    parallel.waitForAny(menu,cmdx.nosd)
else
    menu()
end