{ config, lib, pkgs, ... }: with import <stockholm/lib>; let out = { options.krebs.on-failure = api; config = lib.mkIf cfg.enable imp; }; cfg = config.krebs.on-failure; api = { enable = mkEnableOption "krebs.on-failure" // { default = cfg.plans != {}; }; plans = mkOption { default = {}; type = let inherit (config) krebs; in types.attrsOf (types.submodule ({ config, ... }: { options = { enable = mkEnableOption "krebs.on-failure.${config.name}" // { default = true; }; journalctl = { lines = mkOption { type = types.int; default = 100; }; output = mkOption { type = types.enum [ "cat" "export" "json" "json-pretty" "json-sse" "short" "short-iso" "short-precise" "verbose" ]; default = "short-iso"; }; }; mailto = mkOption { type = types.str; default = krebs.build.user.mail; description = "Mail address to send journal extract to."; }; subject = mkOption { type = types.str; default = "[${krebs.build.host.name}] ${config.name} has failed"; }; name = mkOption { type = types.str; default = config._module.args.name; description = "Name of the to-be-monitored service."; }; }; })); }; sendmail = mkOption { type = types.str; default = "/var/setuid-wrappers/sendmail"; }; }; imp = { systemd.services = foldl (a: b: a // b) {} (map to-services enabled-plans); }; enabled-plans = filter (getAttr "enable") (attrValues cfg.plans); to-services = plan: { "${plan.name}".unitConfig.OnFailure = "on-failure.${plan.name}.service"; "on-failure.${plan.name}".serviceConfig = rec { ExecStart = start plan; SyslogIdentifier = ExecStart.name; Type = "oneshot"; }; }; start = plan: pkgs.writeDash "on-failure.${plan.name}" '' { echo Subject: ${shell.escape plan.subject} echo To: ${shell.escape plan.mailto} echo ${pkgs.systemd}/bin/journalctl \ --lines=${toString plan.journalctl.lines} \ --output=${plan.journalctl.output} \ --since="$( ${pkgs.coreutils}/bin/date +'%F %T UTC' -ud "$( ${pkgs.systemd}/bin/systemctl show \ -p ExecMainStartTimestamp \ ${shell.escape plan.name} \ | ${pkgs.coreutils}/bin/cut -d= -f2- )" )" \ --unit=${shell.escape plan.name}.service } | ${shell.escape cfg.sendmail} -t ''; in out