feat(router): explicit warning if revision is not set (#608)

Author: OlivierDehaene

launcher/src/main.rs

@@ -760,16 +760,6 @@ fn spawn_shards(
     status_sender: mpsc::Sender<ShardStatus>,
     running: Arc<AtomicBool>,
 ) -> Result<(), LauncherError> {
-    if args.trust_remote_code {
-        tracing::warn!(
-            "`trust_remote_code` is set. Trusting that model `{}` do not contain malicious code.",
-            args.model_id
-        );
-        if args.revision.is_none() {
-            tracing::warn!("Explicitly passing a `revision` is encouraged when loading a model with custom code to ensure no malicious code has been contributed in a newer revision.");
-        }
-    }
-
     // Start shard processes
     for rank in 0..num_shard {
         let model_id = args.model_id.clone();
@@ -1025,6 +1015,12 @@ fn main() -> Result<(), LauncherError> {
             "`validation_workers` must be > 0".to_string(),
         ));
     }
+    if args.trust_remote_code {
+        tracing::warn!(
+            "`trust_remote_code` is set. Trusting that model `{}` do not contain malicious code.",
+            args.model_id
+        );
+    }
 
     let num_shard = find_num_shards(args.sharded, args.num_shard)?;
     if num_shard > 1 {

router/src/main.rs

@@ -49,8 +49,8 @@ struct Args {
     master_shard_uds_path: String,
     #[clap(default_value = "bigscience/bloom", long, env)]
     tokenizer_name: String,
-    #[clap(default_value = "main", long, env)]
-    revision: String,
+    #[clap(long, env)]
+    revision: Option<String>,
     #[clap(default_value = "2", long, env)]
     validation_workers: usize,
     #[clap(long, env)]
@@ -147,7 +147,7 @@ fn main() -> Result<(), RouterError> {
         // Download and instantiate tokenizer
         // We need to download it outside of the Tokio runtime
         let params = FromPretrainedParameters {
-            revision: revision.clone(),
+            revision: revision.clone().unwrap_or("main".to_string()),
             auth_token: authorization_token.clone(),
             ..Default::default()
         };
@@ -175,7 +175,7 @@ fn main() -> Result<(), RouterError> {
                     sha: None,
                     pipeline_tag: None,
                 },
-                false => get_model_info(&tokenizer_name, &revision, authorization_token)
+                false => get_model_info(&tokenizer_name, revision, authorization_token)
                     .await
                     .unwrap_or_else(|| {
                         tracing::warn!("Could not retrieve model info from the Hugging Face hub.");
@@ -316,9 +316,18 @@ fn init_logging(otlp_endpoint: Option<String>, json_output: bool) {
 /// get model info from the Huggingface Hub
 pub async fn get_model_info(
     model_id: &str,
-    revision: &str,
+    revision: Option<String>,
     token: Option<String>,
 ) -> Option<HubModelInfo> {
+    let revision = match revision {
+        None => {
+            tracing::warn!("`--revision` is not set");
+            tracing::warn!("We strongly advise to set it to a known supported commit.");
+            "main".to_string()
+        }
+        Some(revision) => revision,
+    };
+
     let client = reqwest::Client::new();
     // Poor man's urlencode
     let revision = revision.replace('/', "%2F");
@@ -331,9 +340,18 @@ pub async fn get_model_info(
     let response = builder.send().await.ok()?;
 
     if response.status().is_success() {
-        return serde_json::from_str(&response.text().await.ok()?).ok();
+        let hub_model_info: HubModelInfo =
+            serde_json::from_str(&response.text().await.ok()?).ok()?;
+        if let Some(sha) = &hub_model_info.sha {
+            tracing::info!(
+                "Serving revision {sha} of model {}",
+                hub_model_info.model_id
+            );
+        }
+        Some(hub_model_info)
+    } else {
+        None
     }
-    None
 }
 
 #[derive(Debug, Error)]