More principled initial peers

flake.nix

@@ -40,10 +40,22 @@
         dir = lib.mkOption {
           description = "directory in which to place the listening socket";
           default = "${config.home.homeDirectory}/.ssh/frajtano";
+          type = lib.types.path;
+        };
+        initialPeers = lib.mkOption {
+          description = "initially spawned peers - will be passed to /usr/bin/env";
+          type = with lib.types; listOf (listOf str);
+          default = [];
         };
       };
 
-      config = lib.mkIf cfg.enable {
+      config = let
+        peers = lib.strings.concatMapStringsSep ", " (args: ''{:spawn, {"${pkgs.coreutils}/bin/env", [${lib.concatMapStringsSep ", " (s: ''~S{${s}}'') args}]}}'') cfg.initialPeers;
+        configFile = pkgs.writeText "config.exs" ''
+          import Config
+          config :frajtano, initial_peers: [${peers}]
+        '';
+      in lib.mkIf cfg.enable {
         home.sessionVariables.FRAJTANO_DIR = cfg.dir;
         home.packages = [self.packages.${pkgs.system}.default];
 
@@ -51,7 +63,7 @@
           Unit.Description = "frajtano";
           Unit.After = ["default.target"];
           Service.Type = "notify";
-          Service.Environment = ["'FRAJTANO_DIR=${cfg.dir}'"];
+          Service.Environment = ["'FRAJTANO_DIR=${cfg.dir}'" "'FRAJTANO_CONFIG=${configFile}'"];
           Service.ExecSearchPath = ["${self.packages.${pkgs.system}.default}/bin"];
           Service.ExecStart = "frajtano start";
           Install.WantedBy = ["default.target"];
@@ -62,6 +74,7 @@
           config = {
             EnvironmentVariables = {
               FRAJTANO_DIR = cfg.dir;
+              FRAJTANO_CONFIG = configFile;
             };
             ProgramArguments = ["${self.packages.${pkgs.system}.default}/bin/frajtano" "start"];
             RunAtLoad = true;