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.
89 lines
2.0 KiB
Nix
89 lines
2.0 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.services.monetdb;
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monetdbUser = "monetdb";
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in
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with lib;
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{
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###### interface
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options = {
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services.monetdb = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = "Whether to enable MonetDB database server.";
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};
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package = mkOption {
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type = types.path;
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description = "MonetDB package to use.";
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};
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dbfarmDir = mkOption {
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type = types.path;
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default = "/var/lib/monetdb";
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description = ''
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Specifies location of Monetdb dbfarm (keeps database and auxiliary files).
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'';
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};
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port = mkOption {
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default = "50000";
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example = "50000";
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description = "Port to listen on.";
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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users.extraUsers.monetdb =
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{ name = monetdbUser;
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uid = config.ids.uids.monetdb;
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description = "monetdb user";
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home = cfg.dbfarmDir;
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};
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users.extraGroups.monetdb.gid = config.ids.gids.monetdb;
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environment.systemPackages = [ cfg.package ];
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systemd.services.monetdb =
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{ description = "MonetDB Server";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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path = [ cfg.package ];
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preStart =
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''
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# Initialise the database.
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if ! test -e ${cfg.dbfarmDir}/.merovingian_properties; then
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mkdir -m 0700 -p ${cfg.dbfarmDir}
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chown -R ${monetdbUser} ${cfg.dbfarmDir}
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${cfg.package}/bin/monetdbd create ${cfg.dbfarmDir}
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${cfg.package}/bin/monetdbd set port=${cfg.port} ${cfg.dbfarmDir}
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fi
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'';
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serviceConfig.ExecStart = "${cfg.package}/bin/monetdbd start -n ${cfg.dbfarmDir}";
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serviceConfig.ExecStop = "${cfg.package}/bin/monetdbd stop ${cfg.dbfarmDir}";
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unitConfig.RequiresMountsFor = "${cfg.dbfarmDir}";
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};
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};
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}
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