nixpkgs/nixos/modules/services/mail/rss2email.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.rss2email;
in {
###### interface
options = {
services.rss2email = {
enable = mkOption {
type = types.bool;
default = false;
description = "Whether to enable rss2email.";
};
to = mkOption {
type = types.str;
description = "Mail address to which to send emails";
};
interval = mkOption {
type = types.str;
default = "12h";
description = "How often to check the feeds, in systemd interval format";
};
config = mkOption {
type = with types; attrsOf (either str (either int bool));
default = {};
description = ''
The configuration to give rss2email.
Default will use system-wide <literal>sendmail</literal> to send the
email. This is rss2email's default when running
<literal>r2e new</literal>.
This set contains key-value associations that will be set in the
<literal>[DEFAULT]</literal> block along with the
<literal>to</literal> parameter.
See
<literal>https://github.com/rss2email/rss2email/blob/master/r2e.1</literal>
for more information on which parameters are accepted.
'';
};
feeds = mkOption {
description = "The feeds to watch.";
type = types.attrsOf (types.submodule {
options = {
url = mkOption {
type = types.str;
description = "The URL at which to fetch the feed.";
};
to = mkOption {
type = with types; nullOr str;
default = null;
description = ''
Email address to which to send feed items.
If <literal>null</literal>, this will not be set in the
configuration file, and rss2email will make it default to
<literal>rss2email.to</literal>.
'';
};
};
});
};
};
};
###### implementation
config = mkIf cfg.enable {
users.groups = {
rss2email.gid = config.ids.gids.rss2email;
};
users.users = {
rss2email = {
description = "rss2email user";
uid = config.ids.uids.rss2email;
group = "rss2email";
};
};
services.rss2email.config.to = cfg.to;
systemd.services.rss2email = let
conf = pkgs.writeText "rss2email.cfg" (lib.generators.toINI {} ({
DEFAULT = cfg.config;
} // lib.mapAttrs' (name: feed: nameValuePair "feed.${name}" (
{ inherit (feed) url; } //
lib.optionalAttrs (feed.to != null) { inherit (feed) to; }
)) cfg.feeds
));
in
{
preStart = ''
mkdir -p /var/rss2email
chmod 700 /var/rss2email
cp ${conf} /var/rss2email/conf.cfg
if [ ! -f /var/rss2email/db.json ]; then
echo '{"version":2,"feeds":[]}' > /var/rss2email/db.json
fi
chown -R rss2email:rss2email /var/rss2email
'';
path = [ pkgs.system-sendmail ];
serviceConfig = {
ExecStart =
"${pkgs.rss2email}/bin/r2e -c /var/rss2email/conf.cfg -d /var/rss2email/db.json run";
User = "rss2email";
PermissionsStartOnly = "true";
};
};
systemd.timers.rss2email = {
partOf = [ "rss2email.service" ];
wantedBy = [ "timers.target" ];
timerConfig.OnBootSec = "0";
timerConfig.OnUnitActiveSec = cfg.interval;
};
};
meta.maintainers = with lib.maintainers; [ ekleog ];
}