daemon tests for gotosocial

package.nix

@@ -10,6 +10,7 @@
   rustHooks,
   rustPackages,
   versionCheckHook,
+  writeScript,
 }: lib.callWith' rustPackages ({
   rustPlatform,
   cargo,
@@ -37,12 +38,29 @@ in {
     cp -r --reflink=auto "$dynixCommand/"* "$out/"
     mkdir -p "$modules"
     cp -r --reflink=auto "$dynixModules/"* "$modules/"
+    install -Dm a=rx "$dynixTestingClient" "$out/libexec/dynix-testing-client.py"
   '';
 
   #
   # SUB-DERIVATONS
   #
 
+  dynixTestingClient = writeScript "dynix-testing-client.py" ''
+    #!/usr/bin/env python3
+    import socket, sys, os, json
+    try:
+        sockpath = sys.argv[1]
+    except IndexError:
+        sockpath = f"{os.environ['XDG_RUNTIME_DIR']}/dynix.sock"
+    sock = socket.socket(family=socket.AF_UNIX)
+    sock.connect(sockpath)
+    sock.sendall(sys.stdin.buffer.read())
+    sock.settimeout(20)
+    reply = json.loads(sock.recv(256).decode("utf-8"))
+    print(json.dumps(reply, indent=2))
+    sys.exit(reply["status"])
+  '';
+
   dynixCommand = stdenv.mkDerivation {
     pname = "${self.pname}-command";
     inherit (self) version;