From 84b78eb9c64a132370795af728d95d70af4ff37b Mon Sep 17 00:00:00 2001
From: Jaakko Vanhala <jaakko.vanhala@kamk.fi>
Date: Thu, 9 Apr 2026 15:42:35 +0300
Subject: [PATCH] GPU-tunnistus valinnainen: cargo run --no-default-features
 toimii ilman nvml/wgpu
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Native-node kääntyy nyt macOS:llä ja muilla koneilla ilman NVIDIA-ajureita:
  cargo run --no-default-features  ← vain Ollama, ei GPU-tunnistusta
  cargo run                        ← oletus: GPU-tunnistus mukana (nvml + wgpu)

Feature flag "gpu-detect" kontrolloi nvml-wrapper ja wgpu -riippuvuuksia.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 network-poc/native-node/Cargo.toml  |  8 ++++++--
 network-poc/native-node/src/main.rs | 26 ++++++++++++++++++--------
 2 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/network-poc/native-node/Cargo.toml b/network-poc/native-node/Cargo.toml
index ebdae1b..452a33f 100644
--- a/network-poc/native-node/Cargo.toml
+++ b/network-poc/native-node/Cargo.toml
@@ -3,6 +3,10 @@ name = "native-node"
 version = "0.2.2"
 edition = "2024"
 
+[features]
+default = ["gpu-detect"]
+gpu-detect = ["nvml-wrapper", "wgpu"]
+
 [dependencies]
 tokio = { version = "1.36", features = ["full"] }
 tokio-tungstenite = { version = "0.21", features = ["native-tls"] }
@@ -10,8 +14,8 @@ futures-util = "0.3"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 sysinfo = "0.30"
-nvml-wrapper = "0.10"
-wgpu = "24"
+nvml-wrapper = { version = "0.10", optional = true }
+wgpu = { version = "24", optional = true }
 reqwest = { version = "0.12", features = ["json"] }
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
diff --git a/network-poc/native-node/src/main.rs b/network-poc/native-node/src/main.rs
index ffc7154..718b15b 100644
--- a/network-poc/native-node/src/main.rs
+++ b/network-poc/native-node/src/main.rs
@@ -33,6 +33,7 @@ impl GpuInfo {
     }
 }
 
+#[cfg(feature = "gpu-detect")]
 /// Tunnistaa kaikki GPU:t wgpu:lla (NVIDIA/AMD/Apple/Intel)
 fn collect_gpus_wgpu() -> Vec<GpuInfo> {
     let instance = wgpu::Instance::new(&wgpu::InstanceDescriptor {
@@ -84,6 +85,7 @@ fn collect_gpus_wgpu() -> Vec<GpuInfo> {
     gpus
 }
 
+#[cfg(feature = "gpu-detect")]
 /// Täydentää NVIDIA-GPU:iden tiedot NVML:llä (VRAM, lämpötila, kuormitus)
 fn enrich_nvidia_gpus(gpus: &mut [GpuInfo]) {
     let Ok(nvml) = nvml_wrapper::Nvml::init() else { return };
@@ -109,6 +111,7 @@ fn enrich_nvidia_gpus(gpus: &mut [GpuInfo]) {
     }
 }
 
+#[cfg(feature = "gpu-detect")]
 /// AMD GPU-tiedot Linuxin sysfs:stä (/sys/class/drm/)
 fn enrich_amd_gpus(gpus: &mut [GpuInfo]) {
     let Ok(entries) = std::fs::read_dir("/sys/class/drm") else { return };
@@ -150,10 +153,12 @@ fn enrich_amd_gpus(gpus: &mut [GpuInfo]) {
     }
 }
 
+#[cfg(feature = "gpu-detect")]
 fn read_sysfs_u64(path: &std::path::Path) -> Option<u64> {
     std::fs::read_to_string(path).ok()?.trim().parse().ok()
 }
 
+#[cfg(feature = "gpu-detect")]
 fn find_hwmon_temp(device_path: &std::path::Path) -> Option<u64> {
     let hwmon_dir = device_path.join("hwmon");
     let entries = std::fs::read_dir(&hwmon_dir).ok()?;
@@ -166,8 +171,8 @@ fn find_hwmon_temp(device_path: &std::path::Path) -> Option<u64> {
     None
 }
 
+#[cfg(feature = "gpu-detect")]
 /// Apple GPU-tiedot — wgpu/Metal antaa nimen, tarkempaa dataa ei saa ilman IOKit:ia
-/// mutta Metal adapter_info sisältää jo olennaiset tiedot
 fn enrich_apple_gpus(gpus: &mut [GpuInfo]) {
     // Apple Silicon -koneiden unified memory: koko RAM on GPU:n käytettävissä
     // Arvioidaan system RAM:sta
@@ -187,13 +192,18 @@ fn enrich_apple_gpus(gpus: &mut [GpuInfo]) {
 
 /// Kerää kaikki GPU:t ja täydentää valmistajakohtaiset tiedot
 fn collect_all_gpus() -> Vec<GpuInfo> {
-    let mut gpus = collect_gpus_wgpu();
-
-    enrich_nvidia_gpus(&mut gpus);
-    enrich_amd_gpus(&mut gpus);
-    enrich_apple_gpus(&mut gpus);
-
-    gpus
+    #[cfg(feature = "gpu-detect")]
+    {
+        let mut gpus = collect_gpus_wgpu();
+        enrich_nvidia_gpus(&mut gpus);
+        enrich_amd_gpus(&mut gpus);
+        enrich_apple_gpus(&mut gpus);
+        return gpus;
+    }
+    #[cfg(not(feature = "gpu-detect"))]
+    {
+        Vec::new()
+    }
 }
 
 /// Kerää järjestelmätiedot (CPU, RAM, OS)