Add runtime support: don't only listen on /tmp/frajtano1, script to add peer

default.nix

@@ -1,24 +1,40 @@
 {
+  lib,
+  pkgs,
   mixRelease,
-  fetchMixDeps,
   elixir,
-}:
-mixRelease rec {
+}: let
   pname = "frajtano";
-  version = "0.0.1";
+  pkg = mixRelease {
+    inherit pname;
+    version = "0.0.1";
 
-  inherit elixir;
-  src = builtins.path {
-    path = ./.;
-    name = "${pname}-source";
-    filter = path: _type: baseNameOf path != "flake.nix" && baseNameOf path != "flake.lock";
-  };
-  mixFodDeps = fetchMixDeps {
-    pname = "mix-deps-${pname}";
-    inherit version src;
-    sha256 = "sha256-lknkq6b1yDOLgTpR/tPEk9UKqpqQT6H1N5g15M60nCA=";
-  };
+    inherit elixir;
+    src = builtins.path {
+      path = ./.;
+      name = "${pname}-source";
+      filter = path: _type: baseNameOf path != "flake.nix" && baseNameOf path != "flake.lock";
+    };
 
-  ELIXIR_MAKE_CACHE_DIR = "/tmp/.elixir-make-cache";
-  meta.mainProgram = "${pname}";
-}
+    ELIXIR_MAKE_CACHE_DIR = "/tmp/.elixir-make-cache";
+    meta.mainProgram = pname;
+  };
+  script = pkgs.writeShellScriptBin pname ''
+    set -eu
+    file="$FRAJTANO_DIR/cookie"
+    (umask 077; [ -f "$file" ] || ${pkgs.coreutils}/bin/head -c 128 /dev/urandom | ${pkgs.coreutils}/bin/base64 -w0 > "$file")
+    export RELEASE_COOKIE=$(${pkgs.coreutils}/bin/cat "$file")
+    run() {
+      exec ${lib.getExe pkg} "$@"
+    }
+
+    case $1 in
+      assimilate)
+        run rpc ":ok = \"$(echo -n "$2" | ${pkgs.coreutils}/bin/base64)\" |> Base.decode64!() |> Frajtano.Agent.add_peer()"
+      ;;
+      *)
+        run "$@"
+      ;;
+    esac
+  '';
+in pkgs.symlinkJoin { name = pname; paths = [ script pkg ]; meta.mainProgram = pname; }