CC: Github download

-- You can also find the program here:
-- http://pastebin.com/bKJZMvey
-- pastebin get bKJZMvey get

--(( Variables ))--

local url = "https://raw.github.com/jilleJr/ShopProg/master/"
local filename = ""
local extension = ".lua"
local savepath = ""
local args = {...}

--(( Functions ))--

local function color(fg,bg)
    if term.isColor() then
        if fg then term.setTextColor(fg) end
        if bg then term.setBackgroundColor(bg) end
    end
end

local function usage(text)
    color(colors.red)
    if text then print(text) end
    local file = fs.getName(shell.getRunningProgram())
    print("Usage: "..file.." <file> [save name]")
end

local function get(url)
    local site = http.get(url)
    if site then return site.readAll() end
end

local function save(content,path)
    local file = fs.open(path,"w")
    file.write(content)
    file.close()
end

--(( Error handling ))--

if #args < 1 then
    usage("Missing file")
    return
end

filename = args[1]
savepath = args[2] or filename

--(( Main program ))--

color(colors.yellow)
write("Getting file ")
color(colors.orange)
write("'"..filename.."'")
color(colors.yellow)
print(" from github!")
print("Downloading...")
local content = get(url..filename..extension)
if content == nil then error("Failed!",0) end
color(colors.lime)
print("Success!")

color(colors.yellow)
write("Saving to file ")
color(colors.orange)
write("'"..savepath.."'")
color(colors.yellow)
print("...")
save(content,savepath)
color(colors.lime)
print("Done!")

--(( EOF ))--