fix version check

defuser/defuser.py

@@ -12,10 +12,10 @@
 from defuser.modeling.update_module import update_module
 from defuser.utils.common import (
     MIN_SUPPORTED_TRANSFORMERS_VERSION,
+    is_version_at_least,
     is_supported_transformers_version,
     warn_if_public_api_transformers_unsupported,
 )
-from packaging import version
 import transformers
 from logbar import LogBar
 
@@ -69,7 +69,7 @@ def replace_fused_blocks(model_type: str) -> bool:
             custom_class = getattr(custom_module, custom_class_name)
             setattr(orig_module, orig_class_name, custom_class)
 
-            if version.parse(transformers.__version__) >= version.parse(MIN_SUPPORTED_TRANSFORMERS_VERSION):
+            if is_version_at_least(transformers.__version__, MIN_SUPPORTED_TRANSFORMERS_VERSION):
                 from transformers import conversion_mapping
 
                 if not hasattr(conversion_mapping, "orig_get_checkpoint_conversion_mapping"):
@@ -102,8 +102,7 @@ def check_model_compatibility(model: nn.Module) -> bool:
         return False
 
     min_ver = MODEL_CONFIG[model_type].get("min_transformers_version")
-    current_ver = version.parse(transformers.__version__)
-    if min_ver and current_ver < version.parse(min_ver):
+    if min_ver and not is_version_at_least(transformers.__version__, min_ver):
         logger.warn(
             f"Skip conversion for model_type={model_type}: "
             f"requires transformers>={min_ver}, current version is {transformers.__version__}."

defuser/utils/common.py

@@ -28,6 +28,35 @@ class ModuleNameFilter:
     negative: tuple[pcre.Pattern, ...]
 
 
+def _parse_version(value: str | version.Version) -> version.Version:
+    """Return a normalized packaging version object."""
+    if isinstance(value, version.Version):
+        return value
+    return version.parse(value)
+
+
+def is_version_at_least(
+    installed_version: str | version.Version,
+    minimum_version: str | version.Version,
+) -> bool:
+    """Return whether a version meets a minimum, allowing same-release dev snapshots.
+
+    Hugging Face main-branch builds report versions like ``5.3.0-dev`` which
+    packaging normalizes to ``5.3.0.dev0`` and orders before ``5.3.0``. Defuser
+    treats those dev snapshots as satisfying the corresponding stable floor.
+    """
+    installed = _parse_version(installed_version)
+    minimum = _parse_version(minimum_version)
+
+    if installed >= minimum:
+        return True
+
+    if installed.is_devrelease:
+        return version.parse(installed.base_version) >= minimum
+
+    return False
+
+
 def env_flag(name: str, default: str | bool | None = "0") -> bool:
     """Return ``True`` when an env var is set to a truthy value."""
 
@@ -46,14 +75,14 @@ def is_transformers_version_greater_or_equal_5():
     """Cache the coarse ``transformers>=5`` capability check used by fast paths."""
     import transformers
 
-    return version.parse(transformers.__version__) >= version.parse("5.0.0")
+    return is_version_at_least(transformers.__version__, "5.0.0")
 
 
 def is_supported_transformers_version() -> bool:
     """Return whether the installed transformers version is supported by Defuser's public API."""
     import transformers
 
-    return version.parse(transformers.__version__) >= version.parse(MIN_SUPPORTED_TRANSFORMERS_VERSION)
+    return is_version_at_least(transformers.__version__, MIN_SUPPORTED_TRANSFORMERS_VERSION)
 
 
 def warn_if_public_api_transformers_unsupported(api_name: str, logger) -> bool:

defuser/utils/hf.py

@@ -12,11 +12,10 @@
 import torch
 import transformers
 from logbar import LogBar
-from packaging import version
 from transformers import AutoConfig
 
 from defuser.model_registry import MODEL_CONFIG
-from defuser.utils.common import env_flag, warn_if_public_api_transformers_unsupported
+from defuser.utils.common import env_flag, is_version_at_least, warn_if_public_api_transformers_unsupported
 
 logger = LogBar(__name__)
 
@@ -77,8 +76,7 @@ def pre_check_config(model_name: str | torch.nn.Module):
     cfg = MODEL_CONFIG[model_type]
 
     min_ver = cfg.get("min_transformers_version")
-    tf_ver = version.parse(transformers.__version__)
-    if min_ver and tf_ver < version.parse(min_ver):
+    if min_ver and not is_version_at_least(transformers.__version__, min_ver):
         return False
     try:
         file_path = get_file_path_via_model_name(model_name, "model.safetensors.index.json")

pyproject.toml

@@ -9,7 +9,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "Defuser"
-version = "0.0.16"
+version = "0.0.17"
 description = "Model defuser helper for HF Transformers."
 readme = "README.md"
 requires-python = ">=3.9"