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nixos-configs/modules/beatific.nix

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{ config, lib, pkgs, ... }:
let
inherit (lib) mkDefault mkIf mkMerge mkOption mkOverride types;
cfg = config.beatific;
mkFlag = description: mkOption {
type = types.bool;
inherit description;
default = true;
};
in {
options = {
beatific = {
# The host name is reused for beatific-specific configuration.
# The bulk of common config is handled in beatific.defaults below, but
# having one option without a default ensures that the module cannot be
# imported accidentally.
hostName = mkOption {
type = types.str;
description = "Hostname";
};
isLighthouse = mkOption {
type = types.bool;
description = "Whether this host is a Nebula lighthouse";
default = false;
};
extraPrograms = mkOption {
type = types.bool;
description = "Additional default programs";
default = false;
};
# Groups of related defaults can be disabled by flipping off the switches here:
# beatific.defaults.${category} = false;
# They default to true because the point is to do these things by default.
defaults = {
time = mkFlag "Default time zone and NTP";
i18n = mkFlag "Default locale settings";
programs = mkFlag "Default installed programs";
ssh = mkFlag "Default sshd settings";
nebula = mkFlag "Default beatific nebula settings";
tvb = mkFlag "Default tvb account";
tvbSync = mkFlag "Configure system syncthing for tvb";
hosts = mkFlag "Default 10.22.20.* DNS host entries";
};
};
};
config = mkMerge [
{
# Options to always set
networking.hostName = cfg.hostName;
nix.extraOptions = "experimental-features = nix-command flakes";
# Link /etc/nixos to the flake source
environment.etc.nixos.source = ./..;
environment.etc."bashrc.local".source = ./bashrc;
environment.shellAliases = {
# Shortcut for nixos-rebuild
nr = "sudo nixos-rebuild --fast --flake $HOME/nixos-configs";
# Always preserve mode, ownership, ts with copy
cp = "cp -rp";
xo = "xdg-open";
smv = "rsync -v --remove-source-files";
ffprobe = "ffprobe -hide_banner";
ffmpeg = "ffmpeg -hide_banner";
".." = "cd ..";
"..." = "cd ../..";
"...." = "cd ../../..";
"....." = "cd ../../../..";
};
security.sudo.extraRules = [{
users = [ "tvb" ];
commands = [ { command = "/run/current-system/sw/bin/nixos-rebuild"; options = [ "NOPASSWD" ]; } ];
}];
}
(mkIf cfg.defaults.time {
# mkDefault time zone to make it easy to configure it to non-UTC
time.timeZone = mkDefault "UTC";
services.ntp.enable = true;
services.ntp.servers = [ "time.nist.gov" ];
})
(mkIf cfg.defaults.i18n {
# en_US.UTF-8
i18n.defaultLocale = "en_US.UTF-8";
i18n.extraLocaleSettings = {
LC_ADDRESS = "en_US.UTF-8";
LC_IDENTIFICATION = "en_US.UTF-8";
LC_MEASUREMENT = "en_US.UTF-8";
LC_MONETARY = "en_US.UTF-8";
LC_NAME = "en_US.UTF-8";
LC_NUMERIC = "en_US.UTF-8";
LC_PAPER = "en_US.UTF-8";
LC_TELEPHONE = "en_US.UTF-8";
LC_TIME = "en_US.UTF-8";
};
})
(mkIf cfg.defaults.programs {
environment.systemPackages = with pkgs; [
bat # colorized and numbered `less`
bc # Terminal calculator
curl # omnipotent URL tool
duf # disk-free checker
exiftool # media tag tool
ffmpeg # omnipotent media tool
file # file type inspector
htmlq # jq for html
jq # jq for json
nebula # vpn
poppler_utils # provides pdfto* utils, allows lesspipe to read pdfs
psmisc # provides killall
python3 # second-best language for everything
ripgrep # fast file searcher
rsync # incremental remote copy
sqlite # omnipotent database
tree # directory tree view
unzip # .zip archive tool
vim # terminal editor
viu # terminal image "viewer"
wget # web fetcher
zip # .zip archive tool
(writeShellScriptBin "clip" ''
${xclip}/bin/xclip -sel c < "$1"
'')
];
programs = {
git = {
enable = true;
config = {
init.defaultBranch = "master";
merge.conflictstyle = "diff3";
alias = {
amend = "commit --amend";
fixup = "commit --amend --no-edit";
pick = "cherry-pick";
};
};
};
htop.enable = true;
};
# The nixpkgs default is "nano", so we go one priority higher
environment.variables.EDITOR = mkOverride 999 "vim";
})
(mkIf cfg.extraPrograms {
environment.systemPackages = with pkgs; [
(pkgs.writeShellScriptBin "ebook-convert" ''
exec ${pkgs.calibre}/bin/ebook-convert "$@"
'')
imagemagick # image convertion cli
puddletag # mp3 tag editor
tesseract # OCR engine
];
})
(mkIf cfg.defaults.ssh {
services.openssh.enable = true;
services.openssh.settings.PrintMotd = true;
environment.etc."motd".text = let
ascii = import ./ascii.nix;
in ascii.${cfg.hostName} or ascii.beatific;
networking.firewall.allowPing = true;
networking.firewall.allowedTCPPorts = [ 22 ];
})
(mkIf cfg.defaults.nebula {
services.nebula.networks.beatific = let
empyreanExternalDns = "vpn.alogoulogoi.com";
empyreanInternalIp = "10.22.20.1";
nebulaPort = 4242;
in {
enable = true;
# The lighthouse only listens on the designated subdomain
listen.host = if cfg.isLighthouse then empyreanExternalDns else "0.0.0.0";
listen.port = nebulaPort;
# Standard certificate paths
ca = "/etc/nebula/beatific/beatific.crt";
cert = "/etc/nebula/beatific/${cfg.hostName}.crt";
key = "/etc/nebula/beatific/${cfg.hostName}.key";
isLighthouse = cfg.isLighthouse;
# Non-lighthouses connect to the lighthouse at empyrean
# This should be a VPN address in the static host map
lighthouses = mkIf (! cfg.isLighthouse) [ empyreanInternalIp ];
# Currently there is no VPN-level traffic filtering
firewall.outbound = [ { port = "any"; proto = "any"; host = "any"; } ];
firewall.inbound = [ { port = "any"; proto = "any"; host = "any"; } ];
# Map the lighthouse address to its public address
staticHostMap = { ${empyreanInternalIp} = [ "${empyreanExternalDns}:${toString nebulaPort}" ]; };
settings = {
# Enable UDP holepunching both ways, which allows nodes to establish more direct connections with each other
punchy = { punch = true; response = true; };
};
};
})
(mkIf cfg.defaults.tvb {
users.groups.tvb = {};
users.users.tvb = {
isNormalUser = true;
group = "tvb";
extraGroups = [ "wheel" ];
initialPassword = "password";
openssh.authorizedKeys.keyFiles = (import ../keys).tvb;
};
})
(mkIf cfg.defaults.tvbSync {
# I haven't gotten user services to work correctly yet,
# so for now, tvb monopolizes the system syncthing instance.
# Adding users in the future should probably involve multiple
# system services so as not to require login to sync.
services.syncthing = {
enable = true;
configDir = "/home/tvb/.config/syncthing";
# this doesn't prevent syncthing from putting sync points in other locations, it's just a default
# normally it would make sense to put it at ~ but see https://github.com/NixOS/nixpkgs/pull/273693
dataDir = "/home/tvb/.config/syncthing";
openDefaultPorts = true;
user = "tvb";
group = "tvb";
};
})
(mkIf cfg.defaults.hosts {
# Create *.home host entries for all the beatific members
networking.hosts = {
"10.22.20.1" = [
"empyrean.home"
];
"10.22.20.2" = [
"catacomb.home"
"mirror.catacomb.home"
];
"10.22.20.3" = [
"palamas.home"
];
"10.22.20.4" = [
"stagirite.home"
];
"10.22.20.5" = [
"vagrant.home"
];
"10.22.20.6" = [
"unfolder.home"
];
"10.22.20.7" = [
"centroid.home"
"mopidy.home.ktvb.site"
];
"10.22.20.8" = [
"backyard.home"
"pool.backyard.home"
"mirror.backyard.home"
"jellyfin.home.ktvb.site"
];
"10.22.20.9" = [
"imperium.home"
];
};
})
];
}
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