Accept a YAML list in extra_model_paths.yaml instead of crashing

[ntdat812]

The crash

load_extra_path_config() calls .split("\n") on every value in the config, so the shape people naturally write aborts startup:

comfyui:
  base_path: /models
  checkpoints:
    - ckpt_a
    - ckpt_b

AttributeError: 'list' object has no attribute 'split'

The traceback names neither the file nor the key, so the reader has to know that extra_model_paths.yaml wants newline-separated strings. Measured on master (b78cec8) through the real loader:

list of paths        -> AttributeError: 'list' object has no attribute 'split'
numeric value        -> AttributeError: 'int' object has no attribute 'split'
nested mapping       -> AttributeError: 'dict' object has no attribute 'split'
section is a string  -> TypeError: string indices must be integers
newline string       -> ok      (the documented form)

The change

• A list of paths is accepted alongside the newline string, and the two produce identical results (there is a test asserting exactly that).
• Anything else is skipped with a warning naming the file, section and key, instead of raising. One malformed key no longer stops the other search paths from loading — which matters at startup, where the alternative is a ComfyUI that will not boot until the user decodes an AttributeError.

Skipping rather than raising follows what the loader already does one line above: if conf is None: continue tolerates an empty section. The difference is that a skip is now visible in the log.

The documented newline form goes through the same code path as before.

Tests

tests-unit/utils/extra_config_shapes_test.py — 9 tests through the real load_extra_path_config() with real YAML files on disk.

Against master with only utils/extra_config.py reverted:

FAILED test_list_of_paths_is_accepted
FAILED test_list_and_string_agree
FAILED test_a_malformed_value_is_skipped_without_losing_the_rest[checkpoints: 42]
FAILED test_a_malformed_value_is_skipped_without_losing_the_rest[checkpoints: true]
FAILED test_a_malformed_value_is_skipped_without_losing_the_rest[checkpoints: {a: b}]
FAILED test_a_malformed_entry_inside_a_list_is_skipped
FAILED test_a_section_that_is_not_a_mapping_is_skipped
7 failed, 2 passed

The two that pass on both are the ones pinning behaviour that must not change: the documented newline string, and the already-tolerated empty section.

With the change: tests-unit/utils/ — 24 passed (15 pre-existing + 9 new). ruff check clean on both files.

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**/*: Keep changes small, direct, and limited to the narrowest necessary code path and smallest number of files.
Prefer practical fixes, minimal dependencies, and existing repository patterns; remove obsolete, dead, unreachable, or unused code.
Preserve existing APIs, node names, model-loading behavior, file layout, and workflow compatibility unless replacement is explicitly intended.
Core ComfyUI must not add outbound internet requests, telemetry, tracking, reporting, remote configuration, or background network activity. User-authorized model downloads are limited to the requested artifact and must exclude telemetry and unrelated metadata.

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• tests-unit/utils/extra_config_shapes_test.py

**/*.py

📄 CodeRabbit inference engine (AGENTS.md)

**/*.py: Keep state and capability flags on the object that owns the behavior. Prefer explicit parent-owned attributes over probing child objects with getattr; use child checks only when the child owns the delegated behavior.
Preserve shared method signatures, argument order, return shapes, side effects, and error behavior unless every affected caller and interface is intentionally updated.
Do not add unused compatibility parameters, flags, attributes, constructor options, or model-specific options to shared helpers; keep one-off behavior at the integration boundary.
Normalize third-party return conventions at integration boundaries so core code receives the expected type and shape; avoid undocumented caller-side unwrapping.
Do not add torch.no_grad, torch.inference_mode, or inference-mode wrappers. Do not add model freeze/unfreeze toggles; only disable globally enabled inference mode when a training path requires gradients.
Remove inference-only training behavior such as dropout while preserving checkpoint and state-dict compatibility; use nn.Identity when deleting a module would alter keys or ordering.
Keep imports at module scope except established optional-backend probes or imports required to avoid cycles; avoid unnecessary try/except blocks and use specific exceptions with useful fallbacks.
Do not add workarounds for unsupported library versions, especially PyTorch exception-and-float-cast retries, unless a comment names the exact versions still requiring them.
Let unsupported model formats, invalid quantization metadata, and bad states fail with clear errors instead of silently degrading output.
Match local style, keep comments sparse and useful, and remove comments that merely restate obvious code.
Treat dtype, device placement, VRAM use, and offloading as correctness concerns across CPU, CUDA, ROCm, MPS, DirectML, XPU, NPU, and low-VRAM environments.
Prefer existing ComfyUI and Comfy Kitchen operations, quantization helpers, cast/offload helpe...

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Treat legacy combo, io.Combo, and io.DynamicCombo values affecting filesystem access as untrusted; revalidate them at load/save boundaries with folder_paths, containment checks, or fixed allowlists.

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🔇 Additional comments (1)

tests-unit/utils/extra_config_shapes_test.py (1)

25-54: LGTM!

Also applies to: 61-125

---

📝 Walkthrough

Walkthrough

The extra path configuration loader now accepts newline-separated strings and YAML lists or tuples. It skips invalid path entries with warnings. It also skips non-mapping configuration sections instead of raising errors. Unit tests cover valid formats, equivalent representations, malformed values, non-mapping sections, and empty sections.

Merge Risk: ⚪ Minimal · up to 01c94

The change accepts YAML path lists and skips malformed values with a warning while preserving existing newline-string behavior; no actionable merge-blocking risk remains after normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the primary change: accepting YAML lists in extra_model_paths.yaml to prevent loader crashes.
Description check	✅ Passed	The description directly explains the crash, the loader changes, malformed-value handling, tests, and validation results.
Docstring Coverage	✅ Passed	Docstring check was indeterminate for this PR — some files could not be analyzed in time. Not blocking.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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Inline comments:
In `@tests-unit/utils/extra_config_shapes_test.py`:
- Around line 39-50: Update the test helper _load to manage the temporary
directory with TemporaryDirectory or equivalent guaranteed cleanup, ensuring the
generated extra_model_paths.yaml file and containing directory are removed after
load_extra_path_config completes, including when it raises.

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**/*

📄 CodeRabbit inference engine (AGENTS.md)

**/*: Keep changes small, direct, and limited to the narrowest necessary code path and smallest number of files.
Prefer practical fixes, minimal dependencies, and existing repository patterns; remove obsolete, dead, unreachable, or unused code.
Preserve existing APIs, node names, model-loading behavior, file layout, and workflow compatibility unless replacement is explicitly intended.
Core ComfyUI must not add outbound internet requests, telemetry, tracking, reporting, remote configuration, or background network activity. User-authorized model downloads are limited to the requested artifact and must exclude telemetry and unrelated metadata.

Files:

• utils/extra_config.py
• tests-unit/utils/extra_config_shapes_test.py

**/*.py

📄 CodeRabbit inference engine (AGENTS.md)

**/*.py: Keep state and capability flags on the object that owns the behavior. Prefer explicit parent-owned attributes over probing child objects with getattr; use child checks only when the child owns the delegated behavior.
Preserve shared method signatures, argument order, return shapes, side effects, and error behavior unless every affected caller and interface is intentionally updated.
Do not add unused compatibility parameters, flags, attributes, constructor options, or model-specific options to shared helpers; keep one-off behavior at the integration boundary.
Normalize third-party return conventions at integration boundaries so core code receives the expected type and shape; avoid undocumented caller-side unwrapping.
Do not add torch.no_grad, torch.inference_mode, or inference-mode wrappers. Do not add model freeze/unfreeze toggles; only disable globally enabled inference mode when a training path requires gradients.
Remove inference-only training behavior such as dropout while preserving checkpoint and state-dict compatibility; use nn.Identity when deleting a module would alter keys or ordering.
Keep imports at module scope except established optional-backend probes or imports required to avoid cycles; avoid unnecessary try/except blocks and use specific exceptions with useful fallbacks.
Do not add workarounds for unsupported library versions, especially PyTorch exception-and-float-cast retries, unless a comment names the exact versions still requiring them.
Let unsupported model formats, invalid quantization metadata, and bad states fail with clear errors instead of silently degrading output.
Match local style, keep comments sparse and useful, and remove comments that merely restate obvious code.
Treat dtype, device placement, VRAM use, and offloading as correctness concerns across CPU, CUDA, ROCm, MPS, DirectML, XPU, NPU, and low-VRAM environments.
Prefer existing ComfyUI and Comfy Kitchen operations, quantization helpers, cast/offload helpe...

Files:

• utils/extra_config.py
• tests-unit/utils/extra_config_shapes_test.py

**/*.{py,json}

📄 CodeRabbit inference engine (AGENTS.md)

Treat legacy combo, io.Combo, and io.DynamicCombo values affecting filesystem access as untrusted; revalidate them at load/save boundaries with folder_paths, containment checks, or fixed allowlists.

Files:

• utils/extra_config.py
• tests-unit/utils/extra_config_shapes_test.py

**/*.{py,md,txt,json}

📄 CodeRabbit inference engine (AGENTS.md)

Keep warning and info messages short and actionable, remove noisy or misleading logging, and make documentation edits concise, factual, and tied to changed behavior.

Files:

• utils/extra_config.py
• tests-unit/utils/extra_config_shapes_test.py

**

⚙️ CodeRabbit configuration file

**: IMPORTANT: Only comment on issues directly introduced by this PR's code changes.
Treat AGENTS.md as mandatory repository policy, not optional style guidance.
Flag PR changes that violate AGENTS.md even when the code is otherwise functional.
In particular, enforce architecture boundaries, dtype/device/memory rules,
interface contracts, import style, no unnecessary try/except blocks, no inline
imports, no outbound internet paths in core ComfyUI, and narrow scoped fixes.
Prefer direct findings over suggestions when a rule is violated. Only ignore
AGENTS.md when it clearly conflicts with a newer explicit maintainer instruction
in the PR.
Do NOT flag pre-existing issues in code that was merely moved, re-indented,
de-indented, or reformatted without logic changes. If code appears in the diff
only due to whitespace or structural reformatting (e.g., removing a with: block),
treat it as unchanged. Contributors should not feel obligated to address
pre-existing issues outside the scope of their contribution.

Files:

• utils/extra_config.py
• tests-unit/utils/extra_config_shapes_test.py

🪛 ast-grep (0.45.1)

tests-unit/utils/extra_config_shapes_test.py

[warning] 41-41: File path is request-/variable-derived; validate and normalize to prevent path traversal.
Context: open(path, "w", encoding="utf-8")
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').

(open-filename-from-request)

🔇 Additional comments (1)

utils/extra_config.py (1)

6-36: LGTM!

Also applies to: 46-57, 68-68

[ntdat812]

Fair — the fixture used tempfile.mkdtemp() and left the directory behind on every call, 9 per run.

Switched to pytest's tmp_path, which is cleaned up for me, with a per-call filename so two loads inside one test cannot overwrite each other (test_list_and_string_agree does exactly that).

tests-unit/utils/: 24 passed. ruff check clean.