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{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.nzbget;
in {
options = {
services.nzbget = {
enable = mkEnableOption "NZBGet";
package = mkOption {
type = types.package;
default = pkgs.nzbget;
defaultText = "pkgs.nzbget";
description = "The NZBGet package to use";
};
user = mkOption {
type = types.str;
default = "nzbget";
description = "User account under which NZBGet runs";
};
group = mkOption {
type = types.str;
default = "nzbget";
description = "Group under which NZBGet runs";
};
};
};
config = mkIf cfg.enable {
systemd.services.nzbget = {
description = "NZBGet Daemon";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
path = with pkgs; [
unrar
p7zip
];
preStart = ''
datadir=/var/lib/nzbget
cfgtemplate=${cfg.package}/share/nzbget/nzbget.conf
test -d $datadir || {
echo "Creating nzbget data directory in $datadir"
mkdir -p $datadir
}
test -f $configfile || {
echo "nzbget.conf not found. Copying default config $cfgtemplate to $configfile"
cp $cfgtemplate $configfile
echo "Setting $configfile permissions to 0700 (needs to be written and contains plaintext credentials)"
chmod 0700 $configfile
echo "Setting temporary \$MAINDIR variable in default config required in order to allow nzbget to complete initial start"
echo "Remember to change this to a proper value once NZBGet startup has been completed"
sed -i -e 's/MainDir=.*/MainDir=\/tmp/g' $configfile
}
echo "Ensuring proper ownership of $datadir (${cfg.user}:${cfg.group})."
chown -R ${cfg.user}:${cfg.group} $datadir
'';
script = ''
configfile=/var/lib/nzbget/nzbget.conf
args="--daemon --configfile $configfile"
# The script in preStart (above) copies nzbget's config template to datadir on first run, containing paths that point to the nzbget derivation installed at the time.
# These paths break when nzbget is upgraded & the original derivation is garbage collected. If such broken paths are found in the config file, override them to point to
# the currently installed nzbget derivation.
cfgfallback () {
local hit=`grep -Po "(?<=^$1=).*+" "$configfile" | sed 's/[ \t]*$//'` # Strip trailing whitespace
( test $hit && test -e $hit ) || {
echo "In $configfile, valid $1 not found; falling back to $1=$2"
args+=" -o $1=$2"
}
}
cfgfallback ConfigTemplate ${cfg.package}/share/nzbget/nzbget.conf
cfgfallback WebDir ${cfg.package}/share/nzbget/webui
${cfg.package}/bin/nzbget $args
'';
serviceConfig = {
Type = "forking";
User = cfg.user;
Group = cfg.group;
PermissionsStartOnly = "true";
Restart = "on-failure";
};
};
users.users = mkIf (cfg.user == "nzbget") {
nzbget = {
group = cfg.group;
uid = config.ids.uids.nzbget;
};
};
users.groups = mkIf (cfg.group == "nzbget") {
nzbget = {
gid = config.ids.gids.nzbget;
};
};
};
}
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