tree

--[[
"tree" script for CC

The MIT License (MIT)
Copyright (c) 2017 CrazedProgrammer

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
]]

local tree = { }

local function scan(path, depth)
    local entries = fs.list(path)
    for i = 1, #entries do
        local epath = path.."/"..entries[i]
        tree[#tree + 1] = {depth, fs.isDir(epath), entries[i]}
        if fs.isDir(epath) then
            scan(epath, depth + 1)
        end
    end
end

scan(#({...}) == 0 and shell.dir() or shell.resolve(({...})[1]), 0)

local sw, sh = term.getSize()
for i = 1, #tree do
    local cx, cy = term.getCursorPos()
    if cy == sh and i >= sh then
        term.write("...")
        os.pullEvent("key")
        term.setCursorPos(1, cy)
        term.write("   ")
        term.setCursorPos(1, cy)
    end
    write(("-   "):rep(tree[i][1]))
    term.setTextColor(term.isColor() and (tree[i][2] and colors.green or colors.white) or colors.white)
    print(tree[i][3])
    term.setTextColor(colors.white)
end