tree.lua

--[[
(C) PROMETHEUS TECHNLOGIES 2022

tree.lua v1.0
Lua recursive directory printer
]]
local dir
if #arg==0 then
    dir = shell.dir()
else
    dir = arg[1]
end

if not fs.isDir(dir) then
    printError("Not a directory")
end

function recursiveList(d,i)
    i = i or 0
    for _,n in pairs(fs.list(d)) do
        local sd = d..'/'..n
        if fs.isDir(sd) then
            print(string.rep("  ",i)..n..'/')
            recursiveList(sd,i+1)
        else
            print(string.rep("  ",i)..n)
        end
    end
end

recursiveList(dir,0)