Created
August 18, 2013 09:29
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Lua module to enhance print output with ANSI colors
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| --[[ | |
| Usage: | |
| print = require 'colorprint' | |
| or | |
| lua colorprint.lua test_colors | |
| Feel free to modify, redistribute, or whatever you want without restriction. | |
| ]] | |
| local _print = print | |
| local esc = string.char(27, 91) | |
| local colors = { | |
| [true] = { | |
| esc .. '31m', | |
| esc .. '32m', | |
| esc .. '33m', | |
| esc .. '34m', | |
| esc .. '35m', | |
| }, | |
| [false] = { | |
| esc .. '91m', | |
| esc .. '92m', | |
| esc .. '93m', | |
| esc .. '94m', | |
| esc .. '95m', | |
| } | |
| } | |
| local color_reset = esc .. '0m' | |
| local light = true | |
| local function get_color(i) | |
| return colors[light][1 + i % #colors[light]] | |
| end | |
| local function print(...) | |
| local args = {...} | |
| local last_arg = 0 | |
| for i in pairs(args) do last_arg = i end | |
| -- nothing to print | |
| if last_arg == 0 then _print() return end | |
| -- add color before each parameters | |
| for i = 1, last_arg do | |
| local color | |
| if args[i] == '---' then | |
| color = esc .. '90m' | |
| else | |
| color = get_color(i) | |
| end | |
| args[i] = color .. tostring(args[i]) | |
| end | |
| -- restore normal color | |
| args[#args] = args[#args] .. color_reset | |
| _print(unpack(args)) | |
| -- flip between light and dark colors | |
| light = not light | |
| end | |
| local function test() | |
| math.randomseed(os.time()) | |
| local function randomtable() | |
| local table = {} | |
| for i = 1, math.random(8) do | |
| table[i] = math.random() * math.random(1000) | |
| end | |
| return table, unpack(table) | |
| end | |
| local tables = {} | |
| for i = 1, 5 do | |
| tables[i] = {randomtable()} | |
| end | |
| for i = 1, #tables do | |
| print(unpack(tables[i])) | |
| end | |
| print('---') | |
| for i = 1, #tables do | |
| _print(unpack(tables[i])) | |
| end | |
| end | |
| -- uncomment to test the module | |
| local args = {...} | |
| if args[1] == 'test_colors' then | |
| test() | |
| end | |
| if os.getenv('HOME') then | |
| return print | |
| else | |
| return _print | |
| end |
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