lemonade

packages/lemonade/default.nix

@@ -0,0 +1,136 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+  ninja,
+  pkg-config,
+  # C++ build-time dependencies
+  curl,
+  openssl,
+  zlib,
+  nlohmann_json,
+  libwebsockets,
+  cli11,
+  # Linux system libraries (optional, enable richer features)
+  systemd,
+  libdrm,
+  libcap,
+}:
+
+let
+  # cpp-httplib is not yet in nixpkgs; pre-fetch for CMake FetchContent override.
+  # The CMakeLists.txt version gate requires >= 0.26.0.
+  cpp-httplib-src = fetchFromGitHub {
+    owner = "yhirose";
+    repo = "cpp-httplib";
+    rev = "v0.26.0";
+    hash = "sha256-+VPebnFMGNyChM20q4Z+kVOyI/qDLQjRsaGS0vo8kDM=";
+  };
+in
+
+stdenv.mkDerivation rec {
+  pname = "lemonade";
+  version = "10.0.1";
+
+  src = fetchFromGitHub {
+    owner = "lemonade-sdk";
+    repo = "lemonade";
+    rev = "v${version}";
+    hash = "sha256-aswK7OXMWTFUNHrrktf1Vx3nvTkLWMEhAgWlil1Zu2c=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+    ninja
+    pkg-config
+  ];
+
+  buildInputs = [
+    curl
+    openssl
+    zlib
+    nlohmann_json
+    libwebsockets
+    cli11
+    systemd
+    libdrm
+    libcap
+  ];
+
+  cmakeFlags = [
+    # Disable the web app (requires Node.js / npm at build time)
+    "-DBUILD_WEB_APP=OFF"
+    # Disable Linux tray app (requires GTK3 + AppIndicator3; optional)
+    "-DREQUIRE_LINUX_TRAY=OFF"
+    "-DCMAKE_BUILD_TYPE=Release"
+    # Prevent FetchContent from reaching the network (sandbox-safe)
+    "-DFETCHCONTENT_FULLY_DISCONNECTED=ON"
+    # Provide pre-fetched sources for deps not in nixpkgs
+    "-DFETCHCONTENT_SOURCE_DIR_HTTPLIB=${cpp-httplib-src}"
+  ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p "$out/bin"
+
+    # HTTP server — pure OpenAI-compatible REST API, no CLI interface
+    install -Dm755 lemonade-router "$out/bin/lemonade-router"
+
+    # Console CLI client — primary user-facing tool (serve, list, pull, run,
+    # status, stop, logs, recipes, …); manages the lemonade-router process
+    install -Dm755 lemonade-server "$out/bin/lemonade-server"
+
+    # Standalone HTTP-only CLI client (newer, lightweight alternative to
+    # lemonade-server for scripting; requires a running lemonade-router)
+    if [ -f lemonade ]; then
+      install -Dm755 lemonade "$out/bin/lemonade"
+    fi
+
+    # Resources: model registry (server_models.json), backend version config,
+    # and static web UI assets served by lemonade-router.
+    #
+    # get_resource_path() in path_utils.cpp resolves files as:
+    #   <exe_dir>/resources/<file>   (first check, highest priority)
+    #   /usr/share/lemonade-server/resources/<file>  (fallback)
+    #
+    # We install the real files under share/ and symlink bin/resources →
+    # ../share/lemonade-server/resources so the first check succeeds regardless
+    # of whether the Nix store path is in any of the hardcoded fallback prefixes.
+    if [ -d resources ]; then
+      mkdir -p "$out/share/lemonade-server/resources"
+      cp -r resources/. "$out/share/lemonade-server/resources/"
+      ln -s "$out/share/lemonade-server/resources" "$out/bin/resources"
+    fi
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Local LLM server that serves optimized LLMs from GPUs and NPUs";
+    longDescription = ''
+      Lemonade helps users discover and run local AI apps by serving
+      optimized LLMs, images, and speech directly from their own GPUs and
+      NPUs.  It exposes an OpenAI-compatible REST API at
+      http://localhost:8000/api/v1 and bundles a web UI, model manager,
+      and CLI client.
+
+      Binaries:
+        lemonade-router  — HTTP server (OpenAI-compatible API on :8000)
+        lemonade-server  — CLI client: serve, list, pull, run, status, stop, …
+        lemonade         — standalone HTTP-only CLI for scripting
+
+      Typical usage:
+        lemonade-server serve            # start the server (headless on Linux)
+        lemonade-server list             # browse available models
+        lemonade-server pull Gemma-3-4b-it-GGUF
+        lemonade-server run  Gemma-3-4b-it-GGUF
+    '';
+    homepage = "https://lemonade-server.ai";
+    license = licenses.asl20;
+    mainProgram = "lemonade-server";
+    platforms = platforms.linux;
+    maintainers = [ ];
+  };
+}