218 lines
5.4 KiB
Nix
218 lines
5.4 KiB
Nix
{ config, lib, pkgs, ... }:
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# TODO multiple users
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# TODO inform about unused caches
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# cache = url: "${cfg.dataDir}/.urlwatch/cache/${hashString "sha1" url}"
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with import <stockholm/lib>;
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let
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cfg = config.krebs.urlwatch;
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# TODO assert sendmail's existence
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out = {
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options.krebs.urlwatch = api;
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config = lib.mkIf cfg.enable imp;
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};
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api = {
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enable = mkEnableOption "krebs.urlwatch";
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customSendmail.enable = mkEnableOption "krebs.urlwatch.customSendmail";
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dataDir = mkOption {
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type = types.str;
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default = "/var/lib/urlwatch";
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description = ''
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Directory where the urlwatch service should store its state.
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'';
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};
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from = mkOption {
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type = types.str;
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default = "${user.name}@${config.networking.hostName}.r";
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description = ''
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Content of the From: header of the generated mails.
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'';
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};
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# TODO hooks :: attrsOf hook
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hooksFile = mkOption {
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type = with types; nullOr path;
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default = null;
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description = ''
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File to use as hooks.py module.
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'';
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};
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mailto = mkOption {
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type = types.str;
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default = config.krebs.build.user.mail;
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description = ''
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Content of the To: header of the generated mails. [AKA recipient :)]
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'';
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};
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onCalendar = mkOption {
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type = types.str;
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default = "04:23";
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description = ''
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Run urlwatch at this interval.
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The format is described in systemd.time(7), CALENDAR EVENTS.
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'';
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};
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telegram = {
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enable = mkEnableOption "krebs.urlwatch.telegram" // { default = false; };
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botToken = mkOption {
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type = types.str;
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};
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chatId = mkOption {
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type = types.listOf types.str;
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};
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};
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urls = mkOption {
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type = with types; listOf (either str subtypes.job);
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default = [];
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description = "URL to watch.";
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example = [
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https://nixos.org/channels/nixos-unstable/git-revision
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{ url = http://localhost ; filter = "grep:important.*stuff"; }
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];
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apply = map (x: getAttr (typeOf x) {
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set = x;
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string = {
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url = x;
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filter = null;
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};
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});
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};
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verbose = mkOption {
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type = types.bool;
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default = false;
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description = ''
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verbose output of urlwatch
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'';
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};
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};
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urlsFile = pkgs.writeText "urls"
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(concatMapStringsSep "\n---\n"
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(x: toJSON (filterAttrs (n: v: n != "_module") x)) cfg.urls);
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hooksFile = cfg.hooksFile;
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configFile = pkgs.writeText "urlwatch.yaml" (toJSON {
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display = {
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error = true;
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new = true;
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unchanged = false;
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};
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report = {
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email = {
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enabled = false;
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from = "";
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html = false;
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smtp = {
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host = "localhost";
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keyring = true;
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port = 25;
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starttls = true;
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};
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subject = "{count} changes: {jobs}";
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to = "";
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};
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html.diff = "unified";
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stdout = {
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color = true;
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enabled = true;
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};
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${if cfg.telegram.enable then "telegram" else null} = {
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enabled = cfg.telegram.enable;
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bot_token = cfg.telegram.botToken;
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chat_id = cfg.telegram.chatId;
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};
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text = {
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details = true;
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footer = true;
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line_length = 75;
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};
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};
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});
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imp = {
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systemd.timers.urlwatch = {
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar = cfg.onCalendar;
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Persistent = "true";
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};
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};
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systemd.services.urlwatch = {
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path = with pkgs; [
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coreutils
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gnused
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urlwatch
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];
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environment = {
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HOME = cfg.dataDir;
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LC_ALL = "en_US.UTF-8";
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LOCALE_ARCHIVE = "${pkgs.glibcLocales}/lib/locale/locale-archive";
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SSL_CERT_FILE = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
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};
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serviceConfig = {
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User = user.name;
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PermissionsStartOnly = "true";
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PrivateTmp = "true";
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SyslogIdentifier = "urlwatch";
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Type = "oneshot";
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ExecStart = pkgs.writeDash "urlwatch" ''
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set -euf
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cd /tmp
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urlwatch \
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${optionalString cfg.verbose "-v"} \
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--config=${shell.escape configFile} \
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${optionalString (hooksFile != null)
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"--hooks=${shell.escape hooksFile}"
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} \
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--urls=${shell.escape urlsFile} \
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> changes || :
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${optionalString cfg.customSendmail.enable /* sh */ ''
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if test -s changes; then
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{
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echo Date: $(date -R)
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echo From: ${shell.escape cfg.from}
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echo Subject: $(
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sed -n 's/^\(CHANGED\|ERROR\|NEW\): //p' changes \
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| tr '\n' ' '
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)
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echo To: ${shell.escape cfg.mailto}
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echo
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cat changes
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} | /run/wrappers/bin/sendmail -t
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fi
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''}
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'';
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};
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};
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users.extraUsers = singleton {
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inherit (user) name uid;
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home = cfg.dataDir;
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createHome = true;
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};
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};
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user = rec {
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name = "urlwatch";
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uid = genid_uint31 name;
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};
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subtypes.job = types.submodule {
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options = {
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url = mkOption {
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type = types.str;
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};
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filter = mkOption {
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type = with types; nullOr str; # TODO nullOr subtypes.filter
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};
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};
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};
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in out
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