diff options
Diffstat (limited to '3modules/tv/urlwatch.nix')
-rw-r--r-- | 3modules/tv/urlwatch.nix | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/3modules/tv/urlwatch.nix b/3modules/tv/urlwatch.nix new file mode 100644 index 0000000..d6e796c --- /dev/null +++ b/3modules/tv/urlwatch.nix @@ -0,0 +1,156 @@ +{ 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.tv.urlwatch; + + api = { + dataDir = mkOption { + type = types.str; + default = "/var/lib/urlwatch"; + description = '' + Directory where the urlwatch service should store its state. + ''; + }; + enable = mkOption { + type = types.bool; + default = false; + description = '' + Whether to enable the urlwatch service. + If enabled, then create a timer that calls urlwatch and sends mails + whenever something has changed or an error occurs. + ''; + }; + from = mkOption { + type = types.str; + default = "${cfg.user}@${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 + ]; + }; + user = mkOption { + type = types.str; + default = "urlwatch"; + description = "User under which urlwatch runs."; + }; + }; + + urlsFile = toFile "urls" (concatStringsSep "\n" cfg.urls); + + impl = { + 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 = cfg.user; + PermissionsStartOnly = "true"; + PrivateTmp = "true"; + Type = "oneshot"; + ExecStartPre = + pkgs.writeScript "urlwatch-prestart" '' + #! /bin/sh + set -euf + + dataDir=$HOME + user=${escapeShellArg cfg.user} + + if ! test -e "$dataDir"; then + mkdir -m 0700 -p "$dataDir" + chown "$user": "$dataDir" + fi + ''; + ExecStart = pkgs.writeScript "urlwatch" '' + #! /bin/sh + set -euf + + from=${escapeShellArg cfg.from} + mailto=${escapeShellArg cfg.mailto} + urlsFile=${escapeShellArg urlsFile} + user=${escapeShellArg cfg.user} + + 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 = optionals (cfg.user == "urlwatch") (singleton { + name = "urlwatch"; + uid = 3450919516; # bin/genid urlwatch + }); + }; + +in + +{ + # TODO + #imports = [ + # ./exim + #]; + #config = mkIf cfg.enable + # (if config.tv.exim.enable + # then impl + # else throw "tv.exim must be enabled when enabling tv.urlwatch"); + + options.tv.urlwatch = api; + + config = impl; +} |