fix: warn user to install mamba_ssm package (#1019)

docker/Dockerfile

@@ -20,9 +20,9 @@ WORKDIR /workspace/axolotl
 
 # If AXOLOTL_EXTRAS is set, append it in brackets
 RUN if [ "$AXOLOTL_EXTRAS" != "" ] ; then \
-        pip install -e .[deepspeed,flash-attn,$AXOLOTL_EXTRAS]; \
+        pip install -e .[deepspeed,flash-attn,mamba-ssm,$AXOLOTL_EXTRAS]; \
     else \
-        pip install -e .[deepspeed,flash-attn]; \
+        pip install -e .[deepspeed,flash-attn,mamba-ssm]; \
     fi
 
 # So we can test the Docker image

requirements.txt

@@ -1,5 +1,5 @@
 --extra-index-url https://huggingface.github.io/autogptq-index/whl/cu118/
-packaging
+packaging==23.2
 peft==0.7.0
 transformers @ git+https://github.com/huggingface/transformers.git@3cefac1d974db5e2825a0cb2b842883a628be7a0
 tokenizers==0.15.0
@@ -34,6 +34,8 @@ fschat==0.2.34
 gradio==3.50.2
 tensorboard
 
+mamba-ssm==1.1.1
+
 # remote filesystems
 s3fs
 gcsfs

setup.py

@@ -11,17 +11,17 @@ def parse_requirements():
     with open("./requirements.txt", encoding="utf-8") as requirements_file:
         lines = [r.strip() for r in requirements_file.readlines()]
         for line in lines:
+            is_extras = (
+                "flash-attn" in line
+                or "flash-attention" in line
+                or "deepspeed" in line
+                or "mamba-ssm" in line
+            )
             if line.startswith("--extra-index-url"):
                 # Handle custom index URLs
                 _, url = line.split()
                 _dependency_links.append(url)
-            elif (
-                "flash-attn" not in line
-                and "flash-attention" not in line
-                and "deepspeed" not in line
-                and line
-                and line[0] != "#"
-            ):
+            elif not is_extras and line and line[0] != "#":
                 # Handle standard packages
                 _install_requires.append(line)
 

src/axolotl/models/mamba/__init__.py

@@ -2,8 +2,20 @@
 Modeling module for Mamba models
 """
 
+import importlib
+
+
+def check_mamba_ssm_installed():
+    mamba_ssm_spec = importlib.util.find_spec("mamba_ssm")
+    if mamba_ssm_spec is None:
+        raise ImportError(
+            "MambaLMHeadModel requires mamba_ssm. Please install it with `pip install -e .[mamba-ssm]`"
+        )
+
 
 def fix_mamba_attn_for_loss():
+    check_mamba_ssm_installed()
+
     from mamba_ssm.models import mixer_seq_simple
 
     from .modeling_mamba import MambaLMHeadModel as MambaLMHeadModelFixed