haccfiles/modules/buildinfo.nix
stuebinm 3dc63acf52 modules/buildinfo: simplify implementation
turns out there is a string-slicing function, I just overlooked it when
writing this file (it's even a builtin). So let's use that instead.
2024-04-19 03:38:50 +02:00

28 lines
908 B
Nix

{ config, lib, pkgs, sources, ... }:
let
self = sources.self;
formatDate = date: with lib.strings;
let
year = substring 0 4 date;
month = substring 4 2 date;
day = substring 6 2 date;
hour = substring 8 2 date;
minute = substring 10 2 date;
second = substring 12 2 date;
in
"${year}-${month}-${day} ${hour}:${minute}:${second} UTC";
in
{
system.nixos.label = "${config.system.nixos.release}-haccfiles-${self.shortRev or self.dirtyShortRev}";
users.motd = ''
Welcome to ${config.networking.hostName}, running NixOS ${config.system.nixos.release}!
Built from haccfiles ${self.rev or self.dirtyRev}.
Last commit was at ${formatDate self.lastModifiedDate}.
${if self ? dirtyRev then "\nPlease remember to commit your changes.\n" else ""}
'';
# used by monit
environment.etc."haccfiles-commit".text = self.rev or self.dirtyRev;
}