A random oh-my-posh theme loader for Command Prompt

oh-my-posh-random.lua

math.randomseed(os.time())
math.random()
math.random()
math.random()
function math.randomchoice(t) --Selects a random item from a table
    local keys = {}
    for key, value in pairs(t) do
        keys[#keys + 1] = key --Store keys in another table
    end
    index = keys[math.random(1, #keys)]
    return t[index]
end

-- Lua implementation of PHP scandir function
local i, themes, popen = 0, {}, io.popen
local pfile = popen('dir "%userprofile%\\AppData\\Local\\Programs\\oh-my-posh\\themes\\" /b')
for filename in pfile:lines() do
    i = i + 1
    themes[i] = filename
end
pfile:close()

local theme = math.randomchoice(themes)
local query =
    string.format(
    "oh-my-posh --config=%%userprofile%%\\AppData\\Local\\Programs\\oh-my-posh\\themes\\%s --init --shell cmd",
    theme
)
print(theme) --This line can be removed if you don't want to know which theme is loaded.
load(io.popen(query):read("*a"))()