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43 lines
873 B
Nix
43 lines
873 B
Nix
t: let
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rem = x: y: x - x / y * y;
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days = t / 86400;
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secondsInDay = rem t 86400;
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hours = secondsInDay / 3600;
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minutes = (rem secondsInDay 3600) / 60;
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# Courtesy of https://stackoverflow.com/a/32158604.
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z = days + 719468;
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era =
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(
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if z >= 0
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then z
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else z - 146096
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)
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/ 146097;
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doe = z - era * 146097;
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yoe = (doe - doe / 1460 + doe / 36524 - doe / 146096) / 365;
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y = yoe + era * 400;
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doy = doe - (365 * yoe + yoe / 4 - yoe / 100);
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mp = (5 * doy + 2) / 153;
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d = doy - (153 * mp + 2) / 5 + 1;
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m =
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mp
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+ (
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if mp < 10
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then 3
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else -9
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);
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y' =
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y
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+ (
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if m <= 2
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then 1
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else 0
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);
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pad = s:
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if builtins.stringLength s < 2
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then "0" + s
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else s;
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in "${toString y'}-${pad (toString m)}-${pad (toString d)}-${pad (toString hours)}:${pad (toString minutes)}"
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