darkrc/bin/countdown

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2019-08-02 08:59:50 +00:00
#!/usr/bin/env lua
-- vim: set noexpandtab :miv --
local function parse_time(str)
local target = os.date("*t")
if type(str)=="string" then
local hour, min, sec = (str):match '(%d*):?(%d*):?(%d*)'
if hour and min and sec then
target.hour = tonumber(hour) or 0
target.min = tonumber(min) or 0
target.sec = tonumber(sec) or 0
end
end
return os.time(target)
end
local final, start = ...
local final = parse_time(final)
local start = parse_time(start)
io.stderr:write('Counting down to: '..os.date("%T", final)..'\n')
io.stderr:write(' from: '..os.date("%T", start)..'\n')
while true do
print(os.difftime(os.time(), start)/os.difftime(final, start) * 100)
if not os.execute 'sleep 1' then break end
end