29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
103 lines
2 KiB
Nix
103 lines
2 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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inherit (pkgs) prayer;
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cfg = config.services.prayer;
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stateDir = "/var/lib/prayer";
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prayerUser = "prayer";
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prayerGroup = "prayer";
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prayerExtraCfg = pkgs.writeText "extraprayer.cf" ''
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prefix = "${prayer}"
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var_prefix = "${stateDir}"
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prayer_user = "${prayerUser}"
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prayer_group = "${prayerGroup}"
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sendmail_path = "/var/setuid-wrappers/sendmail"
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use_http_port ${cfg.port}
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${cfg.extraConfig}
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'';
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prayerCfg = pkgs.runCommand "prayer.cf" { } ''
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# We have to remove the http_port 80, or it will start a server there
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cat ${prayer}/etc/prayer.cf | grep -v http_port > $out
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cat ${prayerExtraCfg} >> $out
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'';
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in
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{
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###### interface
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options = {
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services.prayer = {
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enable = mkOption {
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default = false;
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description = ''
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Whether to run the prayer webmail http server.
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'';
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};
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port = mkOption {
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default = "2080";
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description = ''
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Port the prayer http server is listening to.
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'';
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};
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extraConfig = mkOption {
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default = "" ;
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description = ''
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Extra configuration. Contents will be added verbatim to the configuration file.
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'';
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};
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};
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};
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###### implementation
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config = mkIf config.services.prayer.enable {
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environment.systemPackages = [ prayer ];
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users.extraUsers = singleton
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{ name = prayerUser;
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uid = config.ids.uids.prayer;
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description = "Prayer daemon user";
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home = stateDir;
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};
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users.extraGroups = singleton
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{ name = prayerGroup;
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gid = config.ids.gids.prayer;
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};
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jobs.prayer =
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{ name = "prayer";
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startOn = "startup";
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preStart =
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''
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mkdir -m 0755 -p ${stateDir}
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chown ${prayerUser}.${prayerGroup} ${stateDir}
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'';
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daemonType = "daemon";
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exec = "${prayer}/sbin/prayer --config-file=${prayerCfg}";
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};
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};
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}
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