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.
76 lines
1.7 KiB
Nix
76 lines
1.7 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.services.fourStoreEndpoint;
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endpointUser = "fourstorehttp";
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run = "${pkgs.su}/bin/su -s ${pkgs.stdenv.shell} ${endpointUser} -c";
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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.fourStoreEndpoint = {
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enable = mkOption {
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default = false;
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description = "Whether to enable 4Store SPARQL endpoint.";
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};
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database = mkOption {
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default = config.services.fourStore.database;
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description = "RDF database name to expose via the endpoint. Defaults to local 4Store database name.";
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};
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listenAddress = mkOption {
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default = null;
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description = "IP address to listen on.";
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};
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port = mkOption {
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default = 8080;
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description = "port to listen on.";
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};
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options = mkOption {
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default = "";
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description = "Extra CLI options to pass to 4Store's 4s-httpd process.";
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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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assertions = singleton
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{ assertion = cfg.enable -> cfg.database != "";
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message = "Must specify 4Store database name";
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};
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users.extraUsers = singleton
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{ name = endpointUser;
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uid = config.ids.uids.fourStoreEndpoint;
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description = "4Store SPARQL endpoint user";
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# home = stateDir;
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};
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services.avahi.enable = true;
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jobs.fourStoreEndpoint = {
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name = "4store-endpoint";
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startOn = "filesystem";
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exec = ''
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${run} '${pkgs.rdf4store}/bin/4s-httpd -D ${cfg.options} ${if cfg.listenAddress!=null then "-H ${cfg.listenAddress}" else "" } -p ${toString cfg.port} ${cfg.database}'
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'';
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};
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};
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}
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