Unicode Progress Bar in Lua.

progressbar.lua

-- lua code for generating a nice unicode progress bar.
-- author: Ehsan Ghorbannezhad <ehsan at disroot dot org>

-- input percentage
PERCENT = 96

function round(n)
    return math.floor(n+0.5)
end

function progressbar(percent)
    local step = 5
    local phases = {' ', '▏', '▎', '▍', '▌', '▋', '▊', '▉', '█'}
    local nwhole = math.floor(percent / step)
    local nphase = round(percent % step / (step / (#phases - 1)))
    local nempty = (100 / step) - (nwhole + 1)
    local phasechar = phases[nphase+1]
    if percent == 100 then phasechar = '' end

    return ">" .. string.rep(phases[#phases], nwhole) .. phasechar ..
        string.rep(' ', nempty) .. "<"
end

print(progressbar(PERCENT))