[AMD]: hot-patch transformers dynamic_module_utils symlink bug (#29986)

docker/rocm.Dockerfile

@@ -622,6 +622,36 @@ RUN if [ "$BUILD_TRITON" = "1" ]; then \
      && if [ -d python/triton_kernels ]; then pip install -e python/triton_kernels --no-deps; fi; \
     fi
 
+# -----------------------
+# Hot patch: transformers dynamic_module_utils symlink bug (v5.12.1).
+# _compute_local_source_files_hash calls Path(...).resolve() on custom-code
+# module files, following the HF-cache snapshots/<hash>/x.py -> blobs/<blob>
+# symlink. trust_remote_code models whose custom code uses relative imports
+# (e.g. Kimi-K2.6's kimi_k25_vision_processing.py: `from .media_utils import`)
+# then crash with FileNotFoundError: .../blobs/<name>.py at processor init.
+# Mirrors upstream transformers PR #46618 (merged, not yet released): drop the
+# .resolve() on the module file and its relative-import sources so the snapshot
+# .py names (not the blob targets) are used. Self-skips once transformers ships
+# the fix; fails the build loudly if the pattern is present but unpatched.
+RUN python3 - <<'PY'
+import pathlib
+import transformers.dynamic_module_utils as m
+
+MARKS = ["Path(resolved_module_file).resolve()", "Path(source_file).resolve()"]
+path = pathlib.Path(m.__file__)
+src = path.read_text()
+if not any(mark in src for mark in MARKS):
+    print("transformers dynamic_module_utils already fixed; no patch needed")
+else:
+    patched = (
+        src.replace("Path(resolved_module_file).resolve()", "Path(resolved_module_file)")
+           .replace("Path(source_file).resolve()", "Path(source_file)")
+    )
+    assert patched != src, "FATAL: transformers symlink patch matched nothing"
+    path.write_text(patched)
+    print("patched transformers dynamic_module_utils.py (symlink hash fix)")
+PY
+
 # -----------------------
 # Performance environment variable.