chore: add exit code & tox fix

Currently, the training library does not exit when an error is encountered
within the training loop (invoked through torchrun). This commit updates
that functionality so we correctly return an exit code of 1 on child failure.

Additionally, this commit also adds the `make fix` command which
automatically fixes all trivial issues picked up on by ruff

Signed-off-by: Oleg S <97077423+RobotSail@users.noreply.github.com>
(cherry picked from commit 9c899dc)

Author: RobotSail

src/instructlab/training/main_ds.py

@@ -745,6 +745,7 @@ def run_training(torch_args: TorchrunArgs, train_args: TrainingArgs) -> None:
     print(f"\033[92mRunning training command as subprocess: {' '.join(command)}\033[0m")
     process = None
     interrupt: KeyboardInterrupt | Exception | None = None
+    failure = False
     try:
         process = StreamablePopen(
             f"{train_args.ckpt_output_dir}/full_logs_global{torch_args.node_rank}.log",
@@ -755,19 +756,20 @@ def run_training(torch_args: TorchrunArgs, train_args: TrainingArgs) -> None:
         print("Training subprocess interrupted by user.")
         interrupt = e
     except Exception as e:
-        print(f"An error occurred: {str(e)}")
+        print("Unexpected exception received during distributed training")
         interrupt = e
     finally:
         if "process" not in locals() or process is None:
             return
-        if process.poll() == 0:
-            print("\033[92mTraining subprocess exited successfully! 🎉\033[0m")
+
+        failure = process.poll() != 0
+        if not failure:
+            print("\033[92mOperation completed successfully! 🎉\033[0m")
         else:
             print(
                 "\033[91mTraining subprocess has not exited yet. Sending SIGTERM.\033[0m"
             )
 
-        print("Sending interrupt signal to Training subprocess.")
         process.terminate()
         try:
             print("Waiting for process to exit, 60s...")
@@ -779,8 +781,11 @@ def run_training(torch_args: TorchrunArgs, train_args: TrainingArgs) -> None:
             process.kill()
 
         if interrupt:
-            print(f"Error caught from training subprocess.: {interrupt}")
             raise interrupt
+        if failure:
+            raise RuntimeError(
+                "Suffered a failure during distributed training. Please see the training logs for more context."
+            )
 
 
 if __name__ == "__main__":

tox.ini

@@ -66,7 +66,6 @@ commands =
     sh -c 'git diff --exit-code || (echo "pyproject.toml formatting is incorrect. Please run \"make toml-fmt\" and commit the changes." && exit 1)'
 allowlist_externals = make, sh
 
-
 [testenv:spellcheck]
 description = spell check (needs 'aspell' command)
 basepython = {[testenv:py3]basepython}