Support archive (tarball/zip) submissions for model competitions (#34)

- Read submission files as bytes (Vec<u8>) instead of String to handle
  binary archives without crashing on invalid UTF-8
- Change submit_solution signature from &str to &[u8] for file content
- Add is_archive_file() helper to detect .tar.gz, .tgz, .zip files
- Skip popcorn directive parsing for archive files (return empty directives)

Author: msaroufim

src/cmd/submit.rs

@@ -295,10 +295,10 @@ impl App {
             .clone()
             .ok_or_else(|| anyhow!("Submission mode not selected"))?;
 
-        // Read file content
+        // Read file content as bytes (supports both text and archive files)
         let mut file = File::open(&filepath)?;
-        let mut file_content = String::new();
-        file.read_to_string(&mut file_content)?;
+        let mut file_content = Vec::new();
+        file.read_to_end(&mut file_content)?;
 
         self.submission_task = Some(tokio::spawn(async move {
             service::submit_solution(
@@ -734,10 +734,10 @@ pub async fn run_submit_plain(
         anyhow!("Submission mode not specified. Use --mode flag (test, benchmark, leaderboard, profile)")
     })?;
 
-    // Read file content
+    // Read file content as bytes (supports both text and archive files)
     let mut file = File::open(&file_to_submit)?;
-    let mut file_content = String::new();
-    file.read_to_string(&mut file_content)?;
+    let mut file_content = Vec::new();
+    file.read_to_end(&mut file_content)?;
 
     eprintln!("Submitting to leaderboard: {}", final_leaderboard);
     eprintln!("GPU: {}", final_gpu);

src/service/mod.rs

@@ -450,7 +450,7 @@ pub async fn delete_user_submission(client: &Client, submission_id: i64) -> Resu
 pub async fn submit_solution<P: AsRef<Path>>(
     client: &Client,
     filepath: P,
-    file_content: &str,
+    file_content: &[u8],
     leaderboard: &str,
     gpu: &str,
     submission_mode: &str,
@@ -465,7 +465,7 @@ pub async fn submit_solution<P: AsRef<Path>>(
         .ok_or_else(|| anyhow!("Invalid filepath"))?
         .to_string_lossy();
 
-    let part = Part::bytes(file_content.as_bytes().to_vec()).file_name(filename.to_string());
+    let part = Part::bytes(file_content.to_vec()).file_name(filename.to_string());
 
     let form = Form::new().part("file", part);
 
@@ -824,7 +824,7 @@ mod tests {
         let result = submit_solution(
             &client,
             "test.py",
-            "print('hello')",
+            b"print('hello')",
             "test-leaderboard",
             "H100",
             "test",

src/utils/mod.rs

@@ -7,7 +7,28 @@ pub struct PopcornDirectives {
     pub gpus: Vec<String>,
 }
 
+pub fn is_archive_file<P: AsRef<Path>>(filepath: P) -> bool {
+    let path = filepath.as_ref();
+    let name = path
+        .file_name()
+        .unwrap_or_default()
+        .to_string_lossy()
+        .to_lowercase();
+    name.ends_with(".tar.gz") || name.ends_with(".tgz") || name.ends_with(".zip")
+}
+
 pub fn get_popcorn_directives<P: AsRef<Path>>(filepath: P) -> Result<(PopcornDirectives, bool)> {
+    // Archive files (tarballs, zips) are binary and cannot contain directives
+    if is_archive_file(&filepath) {
+        return Ok((
+            PopcornDirectives {
+                leaderboard_name: String::new(),
+                gpus: Vec::new(),
+            },
+            false,
+        ));
+    }
+
     let content = fs::read_to_string(filepath)?;
 
     let mut gpus: Vec<String> = Vec::new();