Extend rendering semaphore and restore verbose shim#14
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Reviewer's GuideThis PR enforces concurrency control on Mermaid CLI invocations via an asyncio semaphore, reintroduces the deprecated verbose flag with a logger shim, overhauls error handling to use logger.exception instead of prints, and updates tests and documentation to reflect these behaviors. Sequence diagram for diagram rendering with enforced semaphore and improved error handlingsequenceDiagram
participant User
participant render_block
participant _render_diagram
participant logger
User->>render_block: call render_block(..., semaphore, verbose)
alt verbose is True
render_block->>logger: setLevel(INFO)
end
render_block->>_render_diagram: await _render_diagram(..., semaphore, ...)
_render_diagram->>semaphore: acquire (async with)
_render_diagram->>CLI: invoke mermaid-cli
_render_diagram->>semaphore: release
alt FileNotFoundError
render_block->>logger: logger.exception("CLI not found")
render_block-->>User: return False
else RuntimeError
render_block->>logger: logger.exception("Runtime error")
render_block-->>User: return False
else Other Exception
render_block->>logger: logger.exception("Unexpected error")
render_block-->>User: return False
else Success
render_block-->>User: return True
end
Class diagram for updated render_block and _render_diagram functionsclassDiagram
class render_block {
+async render_block(block, tmpdir, cfg_path, path, idx, semaphore, timeout=30.0, verbose=None) bool
}
class _render_diagram {
+async _render_diagram(block, tmpdir, cfg_path, path, idx, semaphore, timeout) None
}
render_block --> _render_diagram : calls
note for render_block "Now accepts 'verbose' (deprecated) and logs errors via logger.exception."
note for _render_diagram "Uses 'semaphore' for concurrency control."
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WalkthroughIntroduce the deprecated Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant render_block
participant Logger
participant Subprocess
participant Semaphore
User->>render_block: Call with verbose parameter (optional)
alt verbose is set
render_block->>Logger: Set logger level to INFO
end
render_block->>Semaphore: Acquire semaphore
render_block->>Subprocess: Create subprocess for mermaid-cli
alt subprocess creation fails (FileNotFoundError)
render_block->>Logger: Log error "CLI executable not found"
render_block-->>User: Return False
else subprocess created
render_block-->>User: Return True after rendering
end
render_block->>Semaphore: Release semaphore
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Hey @leynos - I've reviewed your changes and found some issues that need to be addressed.
- Ensure that
_render_diagramactually acquires the semaphore (e.g., viaasync with semaphore:) before invoking the CLI, since tests expect the semaphore to be locked during execution.
Prompt for AI Agents
Please address the comments from this code review:
## Overall Comments
- Consider adding a test to assert that passing the deprecated `verbose` parameter to `render_block` emits a `DeprecationWarning`.
- Ensure that `_render_diagram` actually acquires the semaphore (e.g., via `async with semaphore:`) before invoking the CLI, since tests expect the semaphore to be locked during execution.Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
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🔇 Additional comments (4)
nixie/cli.py (2)
173-174: Hold the semaphore for the full subprocess lifecycle. LGTM.Await
wait_for_procunderasync with sem:to cap concurrent CLI processes reliably. This fixes an oversubscription window. Tests assertingsemaphore.locked()back this up.
27-27: Restoreverboseshim with proper deprecation signalling.Import
warnings, add keyword-onlyverbose: bool | None = None, and warn when provided (includingFalse). Usestacklevel=2to point at the caller. This is API-safe and clear.Also applies to: 192-193, 212-217
nixie/unittests/test_render_diagram.py (1)
30-31: Assert semaphore locking at the right time. LGTM.Verify
semaphore.locked()withinfake_wait_for_procto ensure the semaphore guards the entire subprocess lifecycle. This directly tests the concurrency fix.Also applies to: 63-64
nixie/unittests/test_verbose.py (1)
88-111: Exercise logging path for missing CLI. LGTM.Simulate
FileNotFoundError, assertFalseis returned, and check ERROR log contains “not found” on the "nixie.cli" logger. This validates the new logging-based error handling.
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Actionable comments posted: 16
🔭 Outside diff range comments (1)
nixie/cli.py (1)
112-118: Avoid printing on timeout; propagate the reason up.Stop writing to
stderrinwait_for_procand return a useful message so_render_diagram/render_blockremain the single place logging happens.- except asyncio.TimeoutError: + except asyncio.TimeoutError: proc.kill() await proc.wait() - print(f"{path}: diagram {idx} timed out", file=sys.stderr) - return (False, b"") + msg = f"{path}: diagram {idx} timed out after {timeout:.1f}s" + return (False, msg.encode("utf-8"))
♻️ Duplicate comments (1)
nixie/cli.py (1)
205-207: Document deprecation timeline and migration path forverbose.Spell out removal timeframe/version and instruct to configure logging instead.
- verbose: If ``True``, set the ``nixie.cli`` logger to ``INFO`` to - emit command lines. Preserved for backward compatibility. + verbose: Deprecated. If ``True``, set the ``nixie.cli`` logger to + ``INFO`` to emit command lines. This shim will be removed in a + future release; configure the ``nixie.cli`` logger level instead.
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Use PascalCase for class names in Python files
Use snake_case for variable and function names in Python files
Use UPPER_SNAKE_CASE for module-level constants in Python files
Prefix private/internal helpers or APIs with a single underscore (_) in Python files
Use typing everywhere and maintain full static type coverage in Python files; use Pyright for type-checking
Use TypedDict or Dataclass for structured data where appropriate; for internal-only usage, prefer @DataClass(slots=True)
Avoid Any in type annotations; use Unknown, generics, or cast() when necessary, and always document why Any is acceptable if used
Be explicit with return types in public functions and class methods (e.g., use -> None, -> str, etc.)
Favor immutability in Python files; prefer tuples over lists, and frozendict or types.MappingProxyType where appropriate
Enable Ruff for linting and formatting; use Ruff to lint for performance, security, consistency, and style issues, and let Ruff handle whitespace and formatting entirely
Enforce strict mode in Pyright and treat all Pyright warnings as CI errors; use # pyright: ignore sparingly and with explanation
Avoid side effects at import time in Python modules; modules should not modify global state or perform actions on import
Use docstrings to document public functions, classes, and modules using NumPy format
Explain tricky code with inline comments for non-obvious logic or decisions in Python files
**/*.py: Use context managers to encapsulate setup and teardown logic cleanly and safely, especially for resource management (files, locks, connections, etc.), instead of manual try/finally blocks.
Use@contextmanagerfromcontextlibfor straightforward proce...
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🧬 Code Graph Analysis (2)
nixie/unittests/test_render_diagram.py (1)
nixie/unittests/test_verbose.py (7)
fake_create_subprocess_exec(33-34)fake_create_subprocess_exec(66-67)fake_create_subprocess_exec(102-103)fake_create_subprocess_exec(135-136)fake_wait_for_proc(36-39)fake_wait_for_proc(69-72)fake_wait_for_proc(105-108)
nixie/unittests/test_verbose.py (2)
nixie/unittests/test_render_diagram.py (4)
fake_create_subprocess_exec(24-25)fake_create_subprocess_exec(57-58)fake_wait_for_proc(27-31)fake_wait_for_proc(60-64)nixie/cli.py (2)
render_block(184-232)get_mmdc_cmd(74-91)
🪛 LanguageTool
docs/CHANGELOG.md
[style] ~6-~6: Consider using the typographical ellipsis character here instead.
Context: ...nderlying mermaid-cli commands. The render_block(verbose=...) parameter mirrors this behaviour.
(ELLIPSIS)
🪛 Ruff (0.12.2)
nixie/unittests/test_render_diagram.py
24-24: Unused function argument: cmd
(ARG001)
28-28: Trailing comma missing
Add trailing comma
(COM812)
57-57: Unused function argument: cmd
(ARG001)
61-61: Trailing comma missing
Add trailing comma
(COM812)
nixie/cli.py
220-223: Use logging.exception instead of logging.error
Replace with exception
(TRY400)
225-225: Use logging.exception instead of logging.error
Replace with exception
(TRY400)
228-228: Trailing comma missing
Add trailing comma
(COM812)
nixie/unittests/test_verbose.py
33-33: Unused function argument: cmd
(ARG001)
37-37: Trailing comma missing
Add trailing comma
(COM812)
66-66: Unused function argument: cmd
(ARG001)
70-70: Trailing comma missing
Add trailing comma
(COM812)
82-82: Trailing comma missing
Add trailing comma
(COM812)
102-102: Unused function argument: cmd
(ARG001)
106-106: Trailing comma missing
Add trailing comma
(COM812)
🔇 Additional comments (4)
nixie/cli.py (2)
168-175: Hold the semaphore across process wait.Keep
await wait_for_proc(...)insideasync with sem:to ensure end‑to‑end limiting of concurrent CLI invocations. This aligns with the PR objective and the new tests.
320-326: Initialise logging predictably in CLI entrypoint.Initialising at WARNING and elevating the module logger on
--verboseis appropriate for a CLI.README.md (1)
50-51: Align verbose description with implementation.Keep this phrasing; it accurately reflects the logger‑based emission of commands.
nixie/unittests/test_verbose.py (1)
135-137: Silence ARG001 by prefixing unused var.Rename
*cmdto*_cmd.- async def fake_create_subprocess_exec(*cmd: str, **_kwargs: object) -> object: + async def fake_create_subprocess_exec(*_cmd: str, **_kwargs: object) -> object: raise FileNotFoundError(2, "No such file or directory", cmd[0])Likely an incorrect or invalid review comment.
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Hey @leynos - I've reviewed your changes and found some issues that need to be addressed.
Prompt for AI Agents
Please address the comments from this code review:
## Individual Comments
### Comment 1
<location> `nixie/cli.py:214` </location>
<code_context>
Notes:
The command line used for rendering is logged at ``INFO`` level.
"""
+ if verbose:
+ logging.getLogger(__name__).setLevel(logging.INFO)
try:
</code_context>
<issue_to_address>
Setting the logger level inside the function may cause side effects in concurrent or multi-invocation scenarios.
This approach can cause race conditions or inconsistent logging if render_block is called concurrently with different verbose values. It's better to configure logging at the CLI entry point or ensure thread safety when changing logger state.
Set the log level once (at command start-up), rather than passing around the `verbose` flag.
</issue_to_address>
### Comment 2
<location> `nixie/cli.py:226` </location>
<code_context>
+ )
+ except RuntimeError:
+ logging.getLogger(__name__).exception("Runtime error while rendering diagram")
+ except Exception:
+ logging.getLogger(__name__).exception(
+ "%s: unexpected error in diagram %s",
+ path,
+ idx,
)
- except RuntimeError as exc:
</code_context>
<issue_to_address>
Catching bare Exception may mask programming errors or system exit signals.
Catching Exception can suppress important errors like KeyboardInterrupt or SystemExit. Please catch only specific exceptions or re-raise unexpected ones after logging.
</issue_to_address>
<suggested_fix>
<<<<<<< SEARCH
except Exception:
logging.getLogger(__name__).exception(
"%s: unexpected error in diagram %s",
path,
idx,
)
=======
except Exception as exc:
if isinstance(exc, (KeyboardInterrupt, SystemExit)):
raise
logging.getLogger(__name__).exception(
"%s: unexpected error in diagram %s",
path,
idx,
)
>>>>>>> REPLACE
</suggested_fix>
### Comment 3
<location> `nixie/unittests/test_verbose.py:33` </location>
<code_context>
block = "A-->B"
- async def fake_create_subprocess_exec(*cmd: str, **kwargs: object) -> object:
+ async def fake_create_subprocess_exec(*_cmd: str, **_kwargs: object) -> object:
return object()
</code_context>
<issue_to_address>
No test for unexpected exceptions in render_block.
Please add tests to cover unexpected exceptions (e.g., Exception, RuntimeError) in render_block, verifying they are logged and the function returns False.
Suggested implementation:
```python
async def fake_wait_for_proc(
_proc: object, _path: Path, _idx: int, _timeout: float
) -> tuple[bool, bytes]:
return True, b""
import pytest
import logging
@pytest.mark.asyncio
async def test_render_block_unexpected_exception(monkeypatch, caplog):
from nixie.verbose import render_block
# Patch something in render_block to raise an unexpected exception
def raise_exception(*args, **kwargs):
raise RuntimeError("unexpected error")
# Example: patch a function render_block calls, e.g., create_subprocess_exec
monkeypatch.setattr("nixie.verbose.create_subprocess_exec", raise_exception)
caplog.set_level(logging.ERROR)
result = await render_block(
block="A-->B",
path="dummy_path",
idx=0,
semaphore=asyncio.Semaphore(1),
timeout=1.0,
)
assert result is False
assert any("unexpected error" in message for message in caplog.text)
```
- Adjust the monkeypatch target (`nixie.verbose.create_subprocess_exec`) to match the actual function or method in `render_block` that should raise the exception.
- Ensure `render_block` is imported from the correct module.
- If `render_block` is not async, remove `@pytest.mark.asyncio` and `await`.
- If the logging level or logger is different, adjust `caplog.set_level`.
</issue_to_address>Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
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Actionable comments posted: 6
♻️ Duplicate comments (5)
docs/CHANGELOG.md (1)
5-8: State deprecation removal window and migration path explicitly.Add the removal version/timeframe for
render_block(verbose=…)and keep a clear instruction to configure thenixie.clilogger.- - `--verbose` now sets the `nixie.cli` logger to INFO, logging the underlying - `mermaid-cli` commands. The `render_block(verbose=...)` parameter is - deprecated and has no effect; configure the `nixie.cli` logger directly - instead. + - `--verbose` now sets the `nixie.cli` logger to INFO, logging the underlying + `mermaid-cli` commands. + - `render_block(verbose=…)` is deprecated and will be removed in vX.Y (or within N releases); + configure the `nixie.cli` logger directly instead.nixie/unittests/test_render_diagram.py (2)
27-29: Add trailing comma in multiline signature (COM812).Satisfy Ruff COM812 for the function signature.
- async def fake_wait_for_proc( - _proc: object, _path: Path, _idx: int, _timeout: float - ) -> tuple[bool, bytes]: + async def fake_wait_for_proc( + _proc: object, _path: Path, _idx: int, _timeout: float, + ) -> tuple[bool, bytes]:
61-64: Add trailing comma in multiline signature (COM812).Apply the same trailing comma fix here.
- async def fake_wait_for_proc( - _proc: object, _path: Path, _idx: int, _timeout: float - ) -> tuple[bool, bytes]: + async def fake_wait_for_proc( + _proc: object, _path: Path, _idx: int, _timeout: float, + ) -> tuple[bool, bytes]:nixie/unittests/test_verbose.py (2)
103-109: Add trailing comma in multiline signature (COM812).- async def fake_wait_for_proc( - _proc: object, _path: Path, _idx: int, _timeout: float - ) -> tuple[bool, bytes]: + async def fake_wait_for_proc( + _proc: object, _path: Path, _idx: int, _timeout: float, + ) -> tuple[bool, bytes]:
37-39: Add trailing comma in multiline signature (COM812).- async def fake_wait_for_proc( - _proc: object, _path: Path, _idx: int, _timeout: float - ) -> tuple[bool, bytes]: + async def fake_wait_for_proc( + _proc: object, _path: Path, _idx: int, _timeout: float, + ) -> tuple[bool, bytes]:
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🔇 Additional comments (7)
nixie/unittests/test_render_diagram.py (1)
27-31: Assert-and-lock check: good semaphore coverage.Keep the assertion to guarantee the semaphore is held during wait; this protects both spawn and wait phases.
nixie/cli.py (4)
129-129: Rename tosemaphore: clarity win.The parameter rename improves readability and intent.
169-176: Hold the semaphore across spawn and wait.Keep
async with semaphorewrapping both process creation and wait; this removes the race window.
214-220: Emit deprecation warning: good.Warning on any explicit
verboseusage matches the deprecation contract.
11-12: Document the deprecation mirror in the module docstring.State that
--verbosemirrors the deprecatedrender_block(verbose=True)and point users to configure thenixie.clilogger. The PR summary claims this is documented; align the docstring.-The ``--verbose`` flag sets the ``nixie.cli`` logger to ``INFO`` to emit the -underlying ``mermaid-cli`` commands. +The ``--verbose`` flag sets the ``nixie.cli`` logger to ``INFO`` to emit the +underlying ``mermaid-cli`` commands. This mirrors ``render_block(verbose=True)``, +which is deprecated and will be removed in a future release; configure the +``nixie.cli`` logger instead.Likely an incorrect or invalid review comment.
nixie/unittests/test_verbose.py (2)
33-33: Silence ARG001 via_cmd/_kwargs: good.Keep underscore-prefixed parameters in stubs to avoid ARG001.
161-169: Runtime error logging test: LGTM.The test correctly patches
_render_diagramto raise and asserts the logged message.
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nixie/unittests/test_verbose.py (1)
176-201: Avoid specifying messages outside the exception class (TRY003).Raise the custom exception class without a message to silence TRY003.
- async def raise_exception(*_args: object, **_kwargs: object) -> None: - raise BoomError("uh oh") + async def raise_exception(*_args: object, **_kwargs: object) -> None: + raise BoomError
♻️ Duplicate comments (4)
nixie/cli.py (4)
196-213: Rewrite render_block docstring to NumPy style per project guidelines.Align with NumPy format (Parameters/Returns/Notes) and document the deprecation inline.
Use:
- """Render a single mermaid block using the CLI asynchronously. - - Args: - block: Mermaid code block to render. - tmpdir: Temporary directory for intermediate files. - cfg_path: Path to the Puppeteer configuration file. - path: Markdown file containing the block. - idx: Index of the block within ``path``. - semaphore: Limits concurrent CLI invocations. - timeout: Maximum time in seconds to wait for the CLI to finish. - verbose: Deprecated. Configure the ``nixie.cli`` logger instead. - - Returns: - ``True`` on success, ``False`` otherwise. - - Notes: - The command line used for rendering is logged at ``INFO`` level. - """ + """Render a single Mermaid block using the CLI asynchronously. + + Parameters + ---------- + block : str + Mermaid code block to render. + tmpdir : Path + Temporary directory for intermediate files. + cfg_path : Path + Path to the Puppeteer configuration file. + path : Path + Markdown file containing the block. + idx : int + Index of the block within ``path``. + semaphore : asyncio.Semaphore + Limits concurrent CLI invocations. + timeout : float, default 30.0 + Maximum time in seconds to wait for the CLI to finish. + verbose : bool | None, optional + Deprecated. Configure the ``nixie.cli`` logger instead. + + Returns + ------- + bool + True on success, False otherwise. + + Notes + ----- + The command line used for rendering is logged at INFO level. + """
11-12: Clarify verbose semantics and deprecation in the module docstring.State that the behaviour mirrors render_block(verbose=True), which is deprecated, and direct users to configure the logger instead.
Apply:
The ``--verbose`` flag sets the ``nixie.cli`` logger to ``INFO`` to emit the -underlying ``mermaid-cli`` commands. +underlying ``mermaid-cli`` commands. This mirrors ``render_block(verbose=True)``, +which is deprecated and will be removed in a future release; configure the +``nixie.cli`` logger instead.
229-233: Include path/index context and add trailing comma in runtime-error logging.Enrich the log for triage and satisfy COM812.
- except RuntimeError: - logging.getLogger(__name__).exception( - "Runtime error while rendering diagram" - ) + except RuntimeError: + logging.getLogger(__name__).exception( + "%s: runtime error while rendering diagram %s", + path, + idx, + )
234-240: Adopt PEP 604 union in isinstance check (UP038).Modernise the isinstance union syntax.
- except Exception as exc: - if isinstance(exc, (KeyboardInterrupt, SystemExit)): + except Exception as exc: + if isinstance(exc, KeyboardInterrupt | SystemExit): raise logging.getLogger(__name__).exception( "%s: unexpected error in diagram %s", path, idx, )
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nixie/cli.py (4)
169-176: Hold the semaphore across spawn and wait (correct concurrency control).Keep the lock for both create_subprocess_exec and wait_for_proc to enforce the intended concurrency ceiling across the full subprocess lifecycle.
214-220: Deprecation shim emits warning (LGTM).Warn on any explicit verbose usage and keep functional behaviour unchanged. The stacklevel is correct.
225-228: Use logging.exception for missing CLI (LGTM).Log with traceback and keep the CLI name in the message.
334-341: Scope logging to nixie.cli (LGTM).Attach a handler to the module logger, disable propagation, and set level based on --verbose without touching the root logger.
nixie/unittests/test_verbose.py (3)
55-92: Validate deprecation and keep logs quiet at WARNING (LGTM).Assert DeprecationWarning and that INFO-level command emission does not occur when logger is at WARNING.
127-150: Log FileNotFoundError path cleanly (LGTM).Assert False return and presence of “not found” in logs. Good coverage for the missing CLI path.
152-174: Capture runtime error logging (LGTM).Exercise the RuntimeError path and assert message presence.
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nixie/cli.py (2)
117-118: Replace timeoutprint(...)with logging to unify error reporting.Avoid
- print(f"{path}: diagram {idx} timed out", file=sys.stderr) - return (False, b"") + logging.getLogger(__name__).warning( + "%s: diagram %s timed out", + path, + idx, + ) + return (False, b"")
288-289: Add full type hints tomainto meet typing guidelines.Annotate parameters and return type.
-async def main(paths, max_concurrent): +async def main(paths: cabc.Iterable[Path], max_concurrent: int) -> int:
♻️ Duplicate comments (2)
nixie/cli.py (2)
11-12: Clarify deprecation in module docstring and mirror render_block behaviour.Align the module docstring with the PR intent and tests by explicitly stating that this mirrors the deprecated
render_block(verbose=True)and advising logging configuration instead.-The ``--verbose`` flag sets the ``nixie.cli`` logger to ``INFO`` to emit the -underlying ``mermaid-cli`` commands. +The ``--verbose`` flag sets the ``nixie.cli`` logger to ``INFO`` to emit the +underlying ``mermaid-cli`` commands. This mirrors ``render_block(verbose=True)``, +which is deprecated and will be removed in a future release; configure the +``nixie.cli`` logger level instead.Likely an incorrect or invalid review comment.
194-196: Align docstring type with the signature and document the migration path.Match the signature’s
bool | Noneand document the deprecation/migration explicitly.- verbose : bool, optional - Deprecated; configure the ``nixie.cli`` logger instead. + verbose : bool | None, optional + Deprecated. Configure the ``nixie.cli`` logger instead. This parameter + will be removed in a future release; set the logger level to ``INFO`` to + emit the command line.Also applies to: 214-216
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🔇 Additional comments (8)
nixie/cli.py (8)
29-29: Import warnings for deprecation — LGTM.Use of
warningsfor the deprecation path is appropriate.
129-131: Renamesem→semaphorefor clarity — LGTM.Improve readability and keep API explicit; docstring is in sync.
Also applies to: 149-150
169-176: Hold the semaphore across both spawn and wait — correct concurrency fix.Ensure the lock covers process creation and completion, preventing over‑subscription. Good alignment with tests.
226-232: Emit DeprecationWarning with stacklevel — LGTM.Warn on any non-None usage without mutating logger state; this avoids side effects.
237-240: Log missing CLI with traceback — LGTM.
logging.exceptionwith the missing executable name is the right choice.
244-250: Exception triage and PEP 604 union — LGTM.Re-raise
KeyboardInterrupt/SystemExitand log unexpected errors with traceback.
344-351: Scope logging tonixie.cliwithout touching root — LGTM.Attach a handler once, disable propagation, and toggle only this logger’s level based on
--verbose.
241-243: Add context to RuntimeError logging and satisfy COM812.Include
pathandidxto aid triage and add trailing comma for formatter rules.- except RuntimeError: - logging.getLogger(__name__).exception("Runtime error while rendering diagram") + except RuntimeError: + logging.getLogger(__name__).exception( + "%s: runtime error while rendering diagram %s", + path, + idx, + )Likely an incorrect or invalid review comment.
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- nixie/cli.py: align with ruff rules (use 'typ' alias, Final for constants), switch temporary-file cleanup to Path.unlink, wrap long lines, and avoid explicit exception messages to satisfy TRY003; add type annotations and clarify docstrings. - tests: reformat test_verbose for ruff; keep behavior intact. - pyproject.toml: add [tool.ruff.lint.per-file-ignores] to relax docstring/type/line-length/import rules in tests only. - Makefile: skip 'uv venv/sync' when .venv already exists to work in restricted environments. All changes are formatting/lint/build tooling only; no functional behavior change intended. Tests could not be executed in this sandbox due to seccomp socket restrictions.
- pyproject.toml: remove ANN from test per-file-ignores to enforce type annotations in tests. - nixie/unittests/test_get_mmdc_cmd.py: annotate monkeypatch as pytest.MonkeyPatch. - tests/integration/conftest.py: annotate monkeypatch fixture param. - tests/integration/test_cli_behavior.py: type *args/**kwargs for mock_check_file. Ruff now passes with ANN enabled in tests.
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Replaces repeated inline logger retrieval with a module-level logger variable to simplify and standardize logging across the module.
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nixie/cli.py (2)
134-152: Align semaphore scope across helpers.
_render_diagramnow holds the semaphore for both subprocess creation and wait, but_run_mermaid_clistill releases the lock immediately after creation. This inconsistency makes effective concurrency depend on which helper is used. Either:- async with sem: - proc = await asyncio.create_subprocess_exec(...) - return await wait_for_proc(proc, path, idx, timeout) + async with sem: + proc = await asyncio.create_subprocess_exec(...) + return await wait_for_proc(proc, path, idx, timeout)or drop
_run_mermaid_cliif it is dead code. Keep a single ordering rule to avoid hidden contention bugs.Also applies to: 202-210
124-129: Replace stray
wait_for_procstill prints time-out errors directly tostderr, contradicting the project’s own “unify error reporting via logging” guideline already applied elsewhere. Emit the message vialogger.exception(TRY400) and drop the print.nixie/unittests/test_verbose.py (1)
37-57: Deduplicate identical stubs with fixture/parametrize.Each test re-declares the same
fake_create_subprocess_exec,fake_wait_for_proc, and monkey-patch boilerplate. Extract these into pytest fixtures or parametrise the cases to trim 100+ lines and improve maintainability.Also applies to: 71-109, 123-143
♻️ Duplicate comments (3)
docs/CHANGELOG.md (1)
5-8: Add a removal window for the deprecated verbose parameter.State when
render_block(verbose=...)will be removed to provide clear migration timing.-- `--verbose` now sets the `nixie.cli` logger to INFO, logging the underlying - `mermaid-cli` commands. The `render_block(verbose=...)` parameter is - deprecated and has no effect; configure the `nixie.cli` logger directly - instead. +- `--verbose` now sets the `nixie.cli` logger to INFO, logging the underlying + `mermaid-cli` commands. +- `render_block(verbose=...)` is deprecated and will be removed in the next + minor release; configure the `nixie.cli` logger directly instead.nixie/cli.py (2)
11-12: Restore deprecation note in module docstring.The earlier revision explicitly mentioned that
--verbosemirrors the now-deprecatedrender_block(verbose=True)and will be removed. That guidance is gone, breaking past review resolution and leaving users without a migration path. Re-insert the deprecation sentence to keep docs, CLI help, and changelog consistent.
278-280: Log runtime-error context.The generic message
"Runtime error while rendering diagram"omits the file path and diagram index that callers supply elsewhere. Add that context to aid troubleshooting:- logging.getLogger(__name__).exception("Runtime error while rendering diagram") + logging.getLogger(__name__).exception( + "%s: runtime error while rendering diagram %s", + path, + idx, + )
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Use PascalCase for class names in Python files
Use snake_case for variable and function names in Python files
Use UPPER_SNAKE_CASE for module-level constants in Python files
Prefix private/internal helpers or APIs with a single underscore (_) in Python files
Use typing everywhere and maintain full static type coverage in Python files; use Pyright for type-checking
Use TypedDict or Dataclass for structured data where appropriate; for internal-only usage, prefer @DataClass(slots=True)
Avoid Any in type annotations; use Unknown, generics, or cast() when necessary, and always document why Any is acceptable if used
Be explicit with return types in public functions and class methods (e.g., use -> None, -> str, etc.)
Favor immutability in Python files; prefer tuples over lists, and frozendict or types.MappingProxyType where appropriate
Enable Ruff for linting and formatting; use Ruff to lint for performance, security, consistency, and style issues, and let Ruff handle whitespace and formatting entirely
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Avoid side effects at import time in Python modules; modules should not modify global state or perform actions on import
Use docstrings to document public functions, classes, and modules using NumPy format
Explain tricky code with inline comments for non-obvious logic or decisions in Python files
**/*.py: Use context managers to encapsulate setup and teardown logic cleanly and safely, especially for resource management (files, locks, connections, etc.), instead of manual try/finally blocks.
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Files:
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pyproject.toml
📄 CodeRabbit Inference Engine (.rules/python-00.mdc)
Use pyproject.toml to configure tools like Ruff, Pyright, and Pytest
pyproject.toml: Always usepyproject.tomlas the central configuration file for Astral uv projects; do not userequirements.txtorsetup.py.
The[project]table inpyproject.tomlmust include at leastnameandversionfields as required by PEP 621.
Includedescriptionandreadmefields in the[project]table to improve indexing and packaging tool compatibility.
Specifyrequires-pythonin the[project]table to constrain supported Python versions.
Use thelicensefield in[project]as either an SPDX identifier (license = { text = "MIT" }) or by referencing a file.
List authors in the[project]table as a list of tables withnameand
Includekeywordsandclassifiersin the[project]table to improve discoverability and registry compatibility.
Declare runtime dependencies in the[project].dependencieslist using PEP 508 syntax.
Use[project.optional-dependencies]to define groups such asdevanddocsfor development and documentation dependencies.
Define CLI entry points using[project.scripts]and GUI entry points using[project.gui-scripts]inpyproject.toml.
Register plugin entry points using[project.entry-points.'group.name']inpyproject.tomlif your project supports plugins.
Declare a[build-system]table withrequires(e.g.,setuptools>=61.0,wheel) andbuild-backend(e.g.,setuptools.build_meta) for modern builds and editable installs.
If[build-system]is omitted, set[tool.uv].package = trueto ensure your project is built and installed by uv.
Set[tool.uv].package = trueto force uv to build and install your project into its virtual environment on everyuv syncoruv run.
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Files:
pyproject.toml
🧬 Code Graph Analysis (2)
nixie/unittests/test_verbose.py (2)
nixie/unittests/test_render_diagram.py (4)
fake_create_subprocess_exec(27-28)fake_create_subprocess_exec(61-62)fake_wait_for_proc(30-34)fake_wait_for_proc(64-68)nixie/cli.py (2)
render_block(219-290)get_mmdc_cmd(89-103)
nixie/unittests/test_render_diagram.py (1)
nixie/unittests/test_verbose.py (7)
fake_create_subprocess_exec(37-38)fake_create_subprocess_exec(71-72)fake_create_subprocess_exec(123-124)fake_create_subprocess_exec(157-158)fake_wait_for_proc(40-43)fake_wait_for_proc(74-77)fake_wait_for_proc(126-129)
🪛 LanguageTool
docs/CHANGELOG.md
[style] ~6-~6: Consider using the typographical ellipsis character here instead.
Context: ...derlying mermaid-cli commands. The render_block(verbose=...) parameter is deprecated and has no...
(ELLIPSIS)
🔇 Additional comments (4)
pyproject.toml (1)
74-74: Acknowledge global D205 ignore.Global ignore for D205 is fine; keep a single source of truth.
README.md (1)
50-51: Clarify verbose behaviour is logger-scoped.Description correctly states that
--verbosesetsnixie.clito INFO and logs the exact command. Good alignment with implementation.nixie/unittests/test_render_diagram.py (2)
27-34: Assert semaphore held during wait; silence unused args.Lock assertion validates the semaphore spans the wait phase;
_prefixes silence ARG001 cleanly.
61-69: Mirror lock assertion for failure path.Maintain parity by asserting lock coverage on error path; unused-arg fix is correct.
| @if [ -x .venv/bin/python ]; then \ | ||
| echo "venv present; skipping uv setup"; \ | ||
| else \ | ||
| uv venv && uv sync --group dev; \ | ||
| fi |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Run uv sync on every build; only gate uv venv creation.
Skipping uv sync when a venv exists risks stale dependencies. Always sync; only skip uv venv.
- @if [ -x .venv/bin/python ]; then \
- echo "venv present; skipping uv setup"; \
- else \
- uv venv && uv sync --group dev; \
- fi
+ @if [ -x .venv/bin/python ]; then \
+ echo "venv present; skipping uv venv"; \
+ else \
+ uv venv; \
+ fi; \
+ uv sync --group dev📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| @if [ -x .venv/bin/python ]; then \ | |
| echo "venv present; skipping uv setup"; \ | |
| else \ | |
| uv venv && uv sync --group dev; \ | |
| fi | |
| @if [ -x .venv/bin/python ]; then \ | |
| echo "venv present; skipping uv venv"; \ | |
| else \ | |
| uv venv; \ | |
| fi; \ | |
| uv sync --group dev |
🤖 Prompt for AI Agents
In the Makefile at lines 16 to 20, modify the conditional so that the `uv venv`
command is only skipped if the virtual environment exists, but the `uv sync
--group dev` command runs every time. This means you should check if the virtual
environment exists to decide whether to run `uv venv`, but always run `uv sync
--group dev` regardless of the venv presence to avoid stale dependencies.
| pytest.warns( | ||
| DeprecationWarning, | ||
| match=( | ||
| r"The 'verbose' parameter is deprecated; configure the" | ||
| r"'nixie\.cli' logger level instead\." | ||
| ), | ||
| ), |
There was a problem hiding this comment.
Fix regexp – missing space breaks assertion.
The joined raw strings produce configure the'nixie\.cli', so the warning text never matches and the test will fail. Insert a space or \s*:
- match=(
- r"The 'verbose' parameter is deprecated; configure the"
- r"'nixie\.cli' logger level instead\."
+ match=(
+ r"The 'verbose' parameter is deprecated; configure the "
+ r"'nixie\.cli' logger level instead\."
),📝 Committable suggestion
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Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| pytest.warns( | |
| DeprecationWarning, | |
| match=( | |
| r"The 'verbose' parameter is deprecated; configure the" | |
| r"'nixie\.cli' logger level instead\." | |
| ), | |
| ), | |
| pytest.warns( | |
| DeprecationWarning, | |
| match=( | |
| r"The 'verbose' parameter is deprecated; configure the " | |
| r"'nixie\.cli' logger level instead\." | |
| ), | |
| ), |
🤖 Prompt for AI Agents
In nixie/unittests/test_verbose.py around lines 86 to 92, the regular expression
used in pytest.warns is missing a space between "configure the" and
"'nixie\.cli'", causing the match to fail. Fix this by adding a space or a
whitespace matcher like \s* between these parts in the regex to correctly match
the warning message text.
| [tool.ruff.lint.per-file-ignores] | ||
| "**/test_*.py" = [ | ||
| "S101", # allow assert in tests | ||
| ] | ||
| "tests/**/conftest.py" = ["D", "TRY003"] | ||
| ignore = ["D205"] |
There was a problem hiding this comment.
Remove duplicated/invalid ignore in per-file-ignores.
ignore = ["D205"] at Line 81 is not a valid key under [tool.ruff.lint.per-file-ignores] and duplicates the global ignore at Line 74. Delete it.
[tool.ruff.lint.per-file-ignores]
"**/test_*.py" = [
"S101", # allow assert in tests
]
"tests/**/conftest.py" = ["D", "TRY003"]
-ignore = ["D205"]🤖 Prompt for AI Agents
In pyproject.toml around lines 76 to 81, the key 'ignore = ["D205"]' under
[tool.ruff.lint.per-file-ignores] is invalid and duplicates a global ignore
setting at line 74. Remove the line 'ignore = ["D205"]' from this section to fix
the issue.
There was a problem hiding this comment.
Actionable comments posted: 3
🔭 Outside diff range comments (4)
nixie/cli.py (4)
196-199: Specify UTF-8 when writing the temporary .mmd file.Align with read_text(encoding="utf-8") and avoid locale-dependent encodings.
- mmd.write_text(block) + mmd.write_text(block, encoding="utf-8")
121-133: Replace print on timeout with logging and catch asyncio.TimeoutError explicitly.Avoid printing from library helpers and log with context. asyncio.wait_for raises asyncio.TimeoutError; catch it explicitly.
- try: - _, stderr = await asyncio.wait_for(proc.communicate(), timeout) - except TimeoutError: + try: + _, stderr = await asyncio.wait_for(proc.communicate(), timeout) + except asyncio.TimeoutError: proc.kill() await proc.wait() - print(f"{path}: diagram {idx} timed out", file=sys.stderr) - return (False, b"") + LOGGER.exception("%s: diagram %s timed out", path, idx) + return False, b"timed out"
136-155: Remove unused _run_mermaid_cli to avoid duplication._render_diagram supersedes _run_mermaid_cli and properly holds the semaphore for the entire lifecycle. Drop the unused helper to reduce cognitive load and keep one codepath.
I can submit a follow-up patch removing this function and adjusting tests if any reference it.
333-339: Use logging for unexpected errors in main.Standardise error reporting; keep prints for progress if desired, but log exceptions.
- except Exception as exc: # noqa: BLE001 pragma: no cover - unexpected - # Catch unexpected errors so the CLI can continue processing. - print(f"Validation task raised an exception: {exc}") + except Exception: # noqa: BLE001 pragma: no cover - unexpected + # Catch unexpected errors so the CLI can continue processing. + LOGGER.exception("Validation task raised an exception")
♻️ Duplicate comments (3)
nixie/cli.py (3)
11-12: Clarify verbose semantics and deprecation in module docstring.State that this mirrors the deprecated render_block(verbose=True) and instruct users to configure logging instead.
-The ``--verbose`` flag sets the ``nixie.cli`` logger to ``INFO`` to emit the -underlying ``mermaid-cli`` commands. +The ``--verbose`` flag sets the ``nixie.cli`` logger to ``INFO`` to emit the +underlying ``mermaid-cli`` commands. This mirrors ``render_block(verbose=True)``, +which is deprecated and will be removed in a future release; configure the +``nixie.cli`` logger instead.
281-289: Include path and index in runtime-error logging.Add context to speed up debugging and satisfy prior lint guidance.
- except RuntimeError: - LOGGER.exception("Runtime error while rendering diagram") + except RuntimeError: + LOGGER.exception( + "%s: runtime error while rendering diagram %s", + path, + idx, + )
374-375: Clarify --verbose help to reflect logger semantics.State explicitly that it sets nixie.cli logger to INFO.
- help="Log mermaid-cli commands for each diagram", + help="Set 'nixie.cli' logger to INFO and log mermaid-cli commands",
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**/*.py: Use snake_case.py for file names, naming files for their contents (e.g., http_client.py, task_queue.py)
Use PascalCase for class names in Python files
Use snake_case for variable and function names in Python files
Use UPPER_SNAKE_CASE for module-level constants in Python files
Prefix private/internal helpers or APIs with a single underscore (_) in Python files
Use typing everywhere and maintain full static type coverage in Python files; use Pyright for type-checking
Use TypedDict or Dataclass for structured data where appropriate; for internal-only usage, prefer @DataClass(slots=True)
Avoid Any in type annotations; use Unknown, generics, or cast() when necessary, and always document why Any is acceptable if used
Be explicit with return types in public functions and class methods (e.g., use -> None, -> str, etc.)
Favor immutability in Python files; prefer tuples over lists, and frozendict or types.MappingProxyType where appropriate
Enable Ruff for linting and formatting; use Ruff to lint for performance, security, consistency, and style issues, and let Ruff handle whitespace and formatting entirely
Enforce strict mode in Pyright and treat all Pyright warnings as CI errors; use # pyright: ignore sparingly and with explanation
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Use docstrings to document public functions, classes, and modules using NumPy format
Explain tricky code with inline comments for non-obvious logic or decisions in Python files
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Use@contextmanagerfromcontextlibfor straightforward proce...
Files:
nixie/cli.py
⚙️ CodeRabbit Configuration File
**/*.py: How about the following?- Keep cyclomatic complexity ≤ 12 - Follow single responsibility and CQRS (command/query segregation) - Docstrings must follow the `numpy` style guide. Use a single-line summary for private functions and methods, and full structured docs for all public interfaces. - Move conditionals with >2 branches to predicate/helper functions - Avoid `eval`, `exec`, `pickle`, monkey-patching, `ctypes`, unsafe shell - Every module must begin with a triple-quoted docstring explaining its purpose, utility, and usage, including example calls if appropriate. - Comments and docs must follow en-GB-oxendict (-ize / -our) spelling and grammar - Lint suppressions: - Blanket `# noqa`, file-level skips, and categories are **forbidden** - Only narrow in-line disables (`# noqa: XYZ`) are permitted, and must be accompanied by `FIXME:` or a ticket link, and used only as a last resort. - Use `pytest` fixtures for shared setup (`conftest.py` or `fixtures/`) - Replace duplicate tests with `@pytest.mark.parametrize` - Prefer `pytest-mock` or `unittest.mock` for stubs/mocks - Use `assert …, "message"` over bare asserts - Reflect all API/behaviour changes in `docs/` and update roadmap on completion - Files must not exceed 400 logical lines: - Decompose large modules into subpackages - Split large `match/case` or dispatch tables by domain and collocate with targets if appropriate - Move bulky data (fixtures, templates) to external files for parsing at runtime - Mutable defaults and shadowed built-ins are forbidden - All code must have clear type hints using modern style (`A | B`, `list[str]`, `class Foo[A]:`, `type Bar = int`, etc.), with ABC imports drawn from the correct stdlib module.
Files:
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🔇 Additional comments (5)
nixie/cli.py (5)
29-29: LGTM: Add warnings import for deprecation.The import is necessary for the DeprecationWarning path.
36-36: LGTM: Use a module-scoped logger.Keep logging unified through LOGGER across the module.
262-268: LGTM: Emit DeprecationWarning for verbose usage.The warning text and stacklevel are appropriate.
271-279: LGTM: Log FileNotFoundError with traceback and guidance.Using LOGGER.exception ensures the traceback is captured for diagnostics.
382-389: LGTM: Scope logging to nixie.cli without touching the root logger.Handler setup, propagate=False, and level selection are correct.
| finally: | ||
| with suppress(OSError): | ||
| path.unlink() | ||
| path.unlink(missing_ok=True) |
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💡 Verification agent
🧩 Analysis chain
Remove redundant missing_ok for wider Python compatibility.
missing_ok=True is redundant under suppress(OSError) and narrows the supported Python versions unnecessarily. Drop it.
If the project targets Python < 3.8, this will otherwise break.
- path.unlink(missing_ok=True)
+ path.unlink()🏁 Script executed:
#!/bin/bash
set -e
echo "Detecting project metadata files..."
fd --max-depth 2 --type f 'setup.py|setup.cfg|pyproject.toml|tox.ini|Pipfile|requirements.*' || true
echo
echo "Scanning for python_requires declarations..."
grep -R "python_requires" -n .
echo
echo "Scanning for Python version classifiers in metadata..."
grep -R "Programming Language :: Python :: " -n .Length of output: 337
🏁 Script executed:
#!/bin/bash
set -e
echo "Check for requires-python in pyproject.toml"
grep -R "requires-python" -n pyproject.toml || echo "No requires-python in pyproject.toml"
echo
echo "Check for Python version classifiers in pyproject.toml"
grep -R "Programming Language :: Python ::" -n pyproject.toml || echo "No Python classifiers in pyproject.toml"
echo
echo "Show context around path.unlink in nixie/cli.py"
sed -n '70,110p' nixie/cli.py
echo
echo "Search for use of suppress in nixie/cli.py"
grep -R "suppress" -n nixie/cli.py || echo "No suppress usage in nixie/cli.py"Length of output: 2036
Simplify unlink by removing redundant missing_ok
Remove the missing_ok=True argument because the surrounding with suppress(OSError): already handles missing-file errors. Drop the redundant parameter.
• File: nixie/cli.py
• Location: within the finally: block of create_puppeteer_config
- with suppress(OSError):
- path.unlink(missing_ok=True)
+ with suppress(OSError):
+ path.unlink()📝 Committable suggestion
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Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| path.unlink(missing_ok=True) | |
| with suppress(OSError): | |
| path.unlink() |
🤖 Prompt for AI Agents
In nixie/cli.py at line 88, inside the finally block of create_puppeteer_config,
remove the redundant argument missing_ok=True from the path.unlink() call
because the surrounding with suppress(OSError): block already handles missing
file errors. Simply call path.unlink() without any arguments to simplify the
code.
| async with semaphore: | ||
| # nosemgrep: python.lang.security.audit.dangerous-asyncio-create-exec-audit | ||
| proc = await asyncio.create_subprocess_exec( | ||
| *cmd, | ||
| stdout=asyncio.subprocess.PIPE, | ||
| stderr=asyncio.subprocess.PIPE, | ||
| ) | ||
| success, stderr = await wait_for_proc(proc, path, idx, timeout) |
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🧹 Nitpick (assertive)
Hold semaphore across the full subprocess lifecycle and fix subprocess alias usage.
Good job moving create+wait under the semaphore. Unify to the imported alias asyncio_subprocess for consistency with _run_mermaid_cli.
- proc = await asyncio.create_subprocess_exec(
+ proc = await asyncio.create_subprocess_exec(
*cmd,
- stdout=asyncio.subprocess.PIPE,
- stderr=asyncio.subprocess.PIPE,
+ stdout=asyncio_subprocess.PIPE,
+ stderr=asyncio_subprocess.PIPE,
)Committable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In nixie/cli.py around lines 204 to 211, hold the semaphore for the entire
subprocess lifecycle by including both the creation and waiting of the
subprocess within the async with semaphore block. Also, replace
asyncio.create_subprocess_exec with the imported alias
asyncio_subprocess.create_subprocess_exec to maintain consistency with other
parts of the code like _run_mermaid_cli.
| verbose : bool, optional | ||
| Deprecated; configure the ``nixie.cli`` logger instead. | ||
|
|
There was a problem hiding this comment.
🧹 Nitpick (assertive)
Align docstring type with signature for verbose.
Document verbose as bool | None and add a brief removal note.
- verbose : bool, optional
- Deprecated; configure the ``nixie.cli`` logger instead.
+ verbose : bool | None, optional
+ Deprecated. Configure the ``nixie.cli`` logger instead. This parameter
+ will be removed in a future release.📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| verbose : bool, optional | |
| Deprecated; configure the ``nixie.cli`` logger instead. | |
| verbose : bool | None, optional | |
| Deprecated. Configure the ``nixie.cli`` logger instead. This parameter | |
| will be removed in a future release. |
🤖 Prompt for AI Agents
In nixie/cli.py around lines 250 to 252, the docstring for the verbose parameter
should be updated to match its type hint in the function signature by
documenting it as bool or None. Additionally, add a brief note indicating that
this parameter is deprecated and will be removed in the future, guiding users to
configure the nixie.cli logger instead.
1 participant
Summary
Testing
make lintmake typecheckmake testhttps://chatgpt.com/codex/tasks/task_e_68951fda2d408322bc1063416fdd0797
Summary by Sourcery
Enforce semaphore locking throughout the diagram rendering process, reinstate the deprecated verbose parameter with logging-based warnings, replace print-based error reports with logger.exception calls, and update the CLI and documentation to reflect these changes.
New Features:
Bug Fixes:
Enhancements:
Documentation:
Tests: