From b6987329fe6dca5aca96fc651f06867c26dbf236 Mon Sep 17 00:00:00 2001 From: tv Date: Fri, 24 Jul 2015 11:55:16 +0200 Subject: 3: {tv -> krebs}.urlwatch --- 3modules/krebs/urlwatch.nix | 136 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 3modules/krebs/urlwatch.nix (limited to '3modules/krebs/urlwatch.nix') diff --git a/3modules/krebs/urlwatch.nix b/3modules/krebs/urlwatch.nix new file mode 100644 index 000000000..58de72fc6 --- /dev/null +++ b/3modules/krebs/urlwatch.nix @@ -0,0 +1,136 @@ +{ config, lib, pkgs, ... }: + +# TODO multiple users +# TODO inform about unused caches +# cache = url: "${cfg.dataDir}/.urlwatch/cache/${hashString "sha1" url}" +# TODO hooks.py + +with builtins; +with lib; +let + cfg = config.krebs.urlwatch; + + # TODO assert sendmail's existence + out = { + options.krebs.urlwatch = api; + config = mkIf cfg.enable imp; + }; + + api = { + enable = mkEnableOption "krebs.urlwatch"; + + dataDir = mkOption { + type = types.str; + default = "/var/lib/urlwatch"; + description = '' + Directory where the urlwatch service should store its state. + ''; + }; + from = mkOption { + type = types.str; + default = "${user.name}@${config.networking.hostName}.retiolum"; + description = '' + Content of the From: header of the generated mails. + ''; + }; + mailto = mkOption { + type = types.str; + description = '' + Content of the To: header of the generated mails. [AKA recipient :)] + ''; + }; + onCalendar = mkOption { + type = types.str; + description = '' + Run urlwatch at this interval. + The format is described in systemd.time(7), CALENDAR EVENTS. + ''; + example = "04:23"; + }; + urls = mkOption { + type = with types; listOf str; + description = "URL to watch."; + example = [ + https://nixos.org/channels/nixos-unstable/git-revision + ]; + }; + }; + + urlsFile = toFile "urls" (concatStringsSep "\n" cfg.urls); + + imp = { + systemd.timers.urlwatch = { + wantedBy = [ "timers.target" ]; + timerConfig = { + OnCalendar = cfg.onCalendar; + Persistent = "true"; + }; + }; + systemd.services.urlwatch = { + path = with pkgs; [ + coreutils + gnused + urlwatch + ]; + environment = { + HOME = cfg.dataDir; + LC_ALL = "en_US.UTF-8"; + LOCALE_ARCHIVE = "${pkgs.glibcLocales}/lib/locale/locale-archive"; + SSL_CERT_FILE = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt"; + }; + serviceConfig = { + User = user.name; + PermissionsStartOnly = "true"; + PrivateTmp = "true"; + Type = "oneshot"; + ExecStartPre = + pkgs.writeScript "urlwatch-prestart" '' + #! /bin/sh + set -euf + + dataDir=$HOME + + if ! test -e "$dataDir"; then + mkdir -m 0700 -p "$dataDir" + chown ${user.name}: "$dataDir" + fi + ''; + ExecStart = pkgs.writeScript "urlwatch" '' + #! /bin/sh + set -euf + + from=${escapeShellArg cfg.from} + mailto=${escapeShellArg cfg.mailto} + urlsFile=${escapeShellArg urlsFile} + + cd /tmp + + urlwatch -e --urls="$urlsFile" > changes 2>&1 || : + + if test -s changes; then + date=$(date -R) + subject=$(sed -n 's/^\(CHANGED\|ERROR\|NEW\): //p' changes \ + | tr \\n \ ) + { + echo "Date: $date" + echo "From: $from" + echo "Subject: $subject" + echo "To: $mailto" + echo + cat changes + } | /var/setuid-wrappers/sendmail -t + fi + ''; + }; + }; + users.extraUsers = singleton { + inherit (user) name uid; + }; + }; + + user = { + name = "urlwatch"; + uid = 3467631196; # genid urlwatch + }; +in +out -- cgit v1.2.3