neyuki 0.6.2

A small Lua-like scripting language implemented in Rust
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-- The ten largest files under a directory, with sizes and dates.
--
--   neyuki disk_usage.nyk ~/Downloads

local fs = require("@neyuki/fs")

local root = os.args()[1] ?? "."

local function human(bytes: number): string
    local units = { "B", "KB", "MB", "GB", "TB" }
    local size, unit = bytes, 1
    while size >= 1024 and unit < #units do
        size /= 1024
        unit += 1
    end
    return string.format(unit == 1 and "%d %s" or "%.1f %s", size, units[unit])
end

local files = {}
local total = 0
for _, path in fs.walk(root) do
    local info = fs.info(fs.join(root, path))
    if info != nil then
        files[#files + 1] = { path = path, size = info.size, modified = info.modified }
        total += info.size
    end
end

table.sort(files, function(a, b) return a.size > b.size end)

print(`{#files} files, {human(total)} in {fs.absolute(root)}\n`)
for index = 1, math.min(10, #files) do
    local file = files[index]
    print(string.format("%10s  %s  %s", human(file.size), os.date("%Y-%m-%d", file.modified), file.path))
end