Sandbox::https://redirect.github.com/koxudaxi/datamodel-code-generator/pull/3390

Koudai Aono (koxudaxi) · 2026-06-13T09:19:39Z

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coderabbitai · 2026-06-13T09:19:51Z

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Plan: Pro

Run ID: 7a97bbff-e4c9-46e8-a5ea-699ea6007f39

📥 Commits

Reviewing files that changed from the base of the PR and between 0322482 and dedf3a7.

📒 Files selected for processing (2)

src/datamodel_code_generator/__init__.py
tests/main/test_main_general.py

📝 Walkthrough

Walkthrough

The PR adds exception-safe cleanup for parser resources in the generate() function. When parser.parse() raises any BaseException, the function now calls parser._dispose() to release resources (suppressing any disposal errors) before re-raising the original error. A test validates this behavior for both standard exceptions and non-Exception BaseException subclasses.

Changes

Parser resource cleanup on parse errors

Layer / File(s)	Summary
Parser disposal error handling `src/datamodel_code_generator/__init__.py`	`generate()` wraps `parser.parse()` in try/except BaseException; on any parse failure, `parser._dispose()` is invoked with exceptions suppressed, then the original error is re-raised.
Test parser disposal on parse errors `tests/main/test_main_general.py`	A test-only `BaseException` subclass `_GenerateParseAbort` is introduced to simulate non-Exception failures. Integration test `test_generate_disposes_parser_when_parse_raises` mocks `_build_parser` and validates `parser._dispose()` is called exactly once and the original error is re-raised for both `RuntimeError` and `_GenerateParseAbort` cases.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

A parser that fails now cleans up with care,
Try-except BaseException handles despair,
Disposal assured, no resource left bare,
Tests prove the way both errors can pair,
Cleanup assured, the rabbit's aware! 🐰

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Dispose parser on parse errors' directly and clearly summarizes the main change: ensuring parser cleanup when parse operations fail.
Docstring Coverage	✅ Passed	Docstring coverage is 80.00% which is sufficient. The required threshold is 80.00%.
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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✨ Finishing Touches

📝 Generate docstrings

Create stacked PR
Commit on current branch

🧪 Generate unit tests (beta)

Create PR with unit tests
Commit unit tests in branch dispose-parser-on-parse-errors

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github-actions · 2026-06-13T09:21:18Z

📚 Docs Preview: https://pr-3390.datamodel-code-generator.pages.dev

codspeed · 2026-06-13T09:22:21Z

Merging this PR will improve performance by 15.41%

⚠️

Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚠️

Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 11 improved benchmarks
⏩ 98 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	`BASE`	`HEAD`	Efficiency
⚡	WallTime	`test_perf_openapi_large`	3.2 s	2.7 s	+16.88%
⚡	WallTime	`test_perf_all_options_enabled`	5.9 s	5.1 s	+16.37%
⚡	WallTime	`test_perf_multiple_files_input`	3.9 s	3.3 s	+16.36%
⚡	WallTime	`test_perf_graphql_style_pydantic_v2`	867.7 ms	748 ms	+16%
⚡	WallTime	`test_perf_aws_style_openapi_pydantic_v2`	2 s	1.8 s	+15.72%
⚡	WallTime	`test_perf_kubernetes_style_pydantic_v2`	2.8 s	2.5 s	+15.45%
⚡	WallTime	`test_perf_complex_refs`	2.1 s	1.8 s	+15.45%
⚡	WallTime	`test_perf_deep_nested`	5.5 s	4.8 s	+14.94%
⚡	WallTime	`test_perf_stripe_style_pydantic_v2`	2.2 s	1.9 s	+14.4%
⚡	WallTime	`test_perf_large_models_pydantic_v2`	3.9 s	3.4 s	+14.08%
⚡	WallTime	`test_perf_duplicate_names`	1.1 s	1 s	+13.91%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

_{Comparing dispose-parser-on-parse-errors (dedf3a7) with main (0322482)}

98 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

codecov · 2026-06-13T09:27:49Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (0322482) to head (dedf3a7).

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #3390   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          138       138           
  Lines        29258     29274   +16     
  Branches      3504      3504           
=========================================
+ Hits         29258     29274   +16

Flag	Coverage Δ
unittests	`100.00% <100.00%> (ø)`

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github-actions · 2026-06-13T09:37:41Z

Breaking Change Analysis

Result: No breaking changes detected

Reasoning: PR #3390 wraps the existing parser.parse() call in generate() with a try/except that disposes the parser (via the private _dispose() method) on any BaseException and then re-raises the original exception unchanged. The successful code-generation path is identical, so generated output is unaffected. No public API, CLI option, default value, template, or Python-version support changed. The original exception is re-raised verbatim (preserving type and identity), and dispose-time errors are suppressed so they cannot mask the real error — preserving rather than altering user-facing error behavior. The only added test code is non-breaking. This is an internal resource-cleanup bugfix with no breaking changes.

This analysis was performed by Claude Code Action

github-actions · 2026-06-14T17:27:44Z

🎉 Released in 0.64.0

This PR is now available in the latest release. See the release notes for details.

Koudai Aono (koxudaxi) and others added 2 commits June 13, 2026 18:19

Dispose parser on parse errors

aff552a

style: auto-fix by pre-commit.ci

dedf3a7

Koudai Aono (koxudaxi) merged commit bcd0b3c into main Jun 13, 2026
52 checks passed

Koudai Aono (koxudaxi) deleted the dispose-parser-on-parse-errors branch June 13, 2026 09:33

github-actions Bot added the breaking-change-analyzed label Jun 13, 2026

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Dispose parser on parse errors - #3390

Dispose parser on parse errors#3390
Koudai Aono (koxudaxi) merged 2 commits into
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dispose-parser-on-parse-errors

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codspeed Bot commented Jun 13, 2026

Merging this PR will improve performance by 15.41%

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Koudai Aono (koxudaxi) commented Jun 13, 2026 •

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