diff options
Diffstat (limited to 'nixos/modules/services/databases/4store.nix')
-rw-r--r-- | nixos/modules/services/databases/4store.nix | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/nixos/modules/services/databases/4store.nix b/nixos/modules/services/databases/4store.nix new file mode 100644 index 000000000000..412d14b050cb --- /dev/null +++ b/nixos/modules/services/databases/4store.nix @@ -0,0 +1,74 @@ +{ config, pkgs, ... }: +let + cfg = config.services.fourStore; + stateDir = "/var/lib/4store"; + fourStoreUser = "fourstore"; + run = "${pkgs.su}/bin/su -s ${pkgs.stdenv.shell} ${fourStoreUser}"; +in +with pkgs.lib; +{ + + ###### interface + + options = { + + services.fourStore = { + + enable = mkOption { + default = false; + description = "Whether to enable 4Store RDF database server."; + }; + + database = mkOption { + default = ""; + description = "RDF database name. If it doesn't exist, it will be created. Databases are stored in ${stateDir}."; + }; + + options = mkOption { + default = ""; + description = "Extra CLI options to pass to 4Store."; + }; + + }; + + }; + + + ###### implementation + + config = mkIf cfg.enable { + + assertions = singleton + { assertion = cfg.enable -> cfg.database != ""; + message = "Must specify 4Store database name."; + }; + + users.extraUsers = singleton + { name = fourStoreUser; + uid = config.ids.uids.fourStore; + description = "4Store database user"; + home = stateDir; + }; + + services.avahi.enable = true; + + jobs.fourStore = { + name = "4store"; + startOn = "filesystem"; + + preStart = '' + mkdir -p ${stateDir}/ + chown ${fourStoreUser} ${stateDir} + if ! test -e "${stateDir}/${cfg.database}"; then + ${run} -c '${pkgs.rdf4store}/bin/4s-backend-setup ${cfg.database}' + fi + ''; + + exec = '' + ${run} -c '${pkgs.rdf4store}/bin/4s-backend -D ${cfg.options} ${cfg.database}' + ''; + }; + + }; + +} |