Replace rustformers/llm with candle

Signed-off-by: karthik2804 <karthik.ganeshram@fermyon.com>

crates/factor-llm/src/spin.rs

@@ -44,7 +44,6 @@ mod local {
 /// The default engine creator for the LLM factor when used in the Spin CLI.
 pub fn default_engine_creator(
     state_dir: Option<PathBuf>,
-    use_gpu: bool,
 ) -> anyhow::Result<impl LlmEngineCreator + 'static> {
     #[cfg(feature = "llm")]
     let engine = {
@@ -53,11 +52,11 @@ pub fn default_engine_creator(
             Some(ref dir) => dir.clone(),
             None => std::env::current_dir().context("failed to get current working directory")?,
         };
-        spin_llm_local::LocalLlmEngine::new(models_dir_parent.join("ai-models"), use_gpu)
+        spin_llm_local::LocalLlmEngine::new(models_dir_parent.join("ai-models"))
     };
     #[cfg(not(feature = "llm"))]
     let engine = {
-        let _ = (state_dir, use_gpu);
+        let _ = (state_dir);
         noop::NoopLlmEngine
     };
     let engine = Arc::new(Mutex::new(engine)) as Arc<Mutex<dyn LlmEngine>>;
@@ -91,15 +90,14 @@ impl LlmEngine for RemoteHttpLlmEngine {
 pub fn runtime_config_from_toml(
     table: &impl GetTomlValue,
     state_dir: Option<PathBuf>,
-    use_gpu: bool,
 ) -> anyhow::Result<Option<RuntimeConfig>> {
     let Some(value) = table.get("llm_compute") else {
         return Ok(None);
     };
     let config: LlmCompute = value.clone().try_into()?;
 
     Ok(Some(RuntimeConfig {
-        engine: config.into_engine(state_dir, use_gpu)?,
+        engine: config.into_engine(state_dir)?,
     }))
 }
 
@@ -111,19 +109,15 @@ pub enum LlmCompute {
 }
 
 impl LlmCompute {
-    fn into_engine(
-        self,
-        state_dir: Option<PathBuf>,
-        use_gpu: bool,
-    ) -> anyhow::Result<Arc<Mutex<dyn LlmEngine>>> {
+    fn into_engine(self, state_dir: Option<PathBuf>) -> anyhow::Result<Arc<Mutex<dyn LlmEngine>>> {
         let engine: Arc<Mutex<dyn LlmEngine>> = match self {
             #[cfg(not(feature = "llm"))]
             LlmCompute::Spin => {
-                let _ = (state_dir, use_gpu);
+                let _ = (state_dir);
                 Arc::new(Mutex::new(noop::NoopLlmEngine))
             }
             #[cfg(feature = "llm")]
-            LlmCompute::Spin => default_engine_creator(state_dir, use_gpu)?.create(),
+            LlmCompute::Spin => default_engine_creator(state_dir)?.create(),
             LlmCompute::RemoteHttp(config) => Arc::new(Mutex::new(RemoteHttpLlmEngine::new(
                 config.url,
                 config.auth_token,

crates/llm-local/Cargo.toml

@@ -6,30 +6,28 @@ edition = { workspace = true }
 
 [dependencies]
 anyhow = "1.0"
-candle = { git = "https://github.com/huggingface/candle", rev = "b80348d22f8f0dadb6cc4101bde031d5de69a9a5", package = "candle-core" }
-candle-nn = { git = "https://github.com/huggingface/candle", rev = "b80348d22f8f0dadb6cc4101bde031d5de69a9a5" }
+candle = { git = "https://github.com/huggingface/candle", rev = "e3261216b157a7305c18ccdd766b6e2a41afe483", package = "candle-core" }
+candle-nn = { git = "https://github.com/huggingface/candle", rev = "e3261216b157a7305c18ccdd766b6e2a41afe483" }
+candle-transformers = { git = "https://github.com/huggingface/candle", rev = "e3261216b157a7305c18ccdd766b6e2a41afe483" }
 chrono = "0.4.26"
-llm = { git = "https://github.com/rustformers/llm", rev = "2f6ffd4435799ceaa1d1bcb5a8790e5b3e0c5663", features = [
-  "tokenizers-remote",
-  "llama",
-], default-features = false }
 lru = "0.9.0"
 num_cpus = "1"
 rand = "0.8.5"
 safetensors = "0.3.3"
 serde = { version = "1.0.150", features = ["derive"] }
+serde_json = "1.0.125"
 spin-common = { path = "../common" }
 spin-core = { path = "../core" }
 spin-world = { path = "../world" }
 terminal = { path = "../terminal" }
-tokenizers = "0.13.4"
+tokenizers = "0.19.1"
 tokio = { version = "1.32.0", features = ["macros", "sync"] }
 tracing = { workspace = true }
 
 [features]
 default = []
-metal = ["llm/metal"]
-cublas = ["llm/cublas"]
+metal = ["candle/metal", "candle-nn/metal", "candle-transformers/metal"]
+cublas = ["candle/cuda", "candle-nn/cuda", "candle-transformers/cuda"]
 
 [lints]
 workspace = true

crates/llm-local/src/bert.rs

@@ -4,7 +4,7 @@
 ///
 /// TODO: Remove this file when a new release of Candle makes it obsolete.
 use anyhow::{bail, Result};
-use candle::{DType, Tensor};
+use candle::{DType, Module, Tensor};
 use candle_nn::{Embedding, VarBuilder};
 use serde::Deserialize;