Refactor: Use DeepDiff instead of DictDiffer

[adrien-berchet]

This pull request introduces significant improvements to dictionary comparison functionality by replacing the dictdiffer dependency with deepdiff, enhancing diff output formatting, and adding support for numeric tolerance in comparisons. It also updates development dependencies and pre-commit hooks to newer versions for better reliability and maintainability.

Dictionary Comparison Refactor and Improvements:

• Replaced the dictdiffer dependency with deepdiff for dictionary comparisons, resulting in more robust and detailed diff reports (pyproject.toml, dir_content_diff/base_comparators.py). [1] [2] [3]
• Implemented a custom numeric tolerance operator (_NumericToleranceOperator) to allow approximate equality for floats and numbers in dictionary diffs (dir_content_diff/base_comparators.py).
• Refactored diff output formatting for dictionaries to be clearer and more human-readable, with improved messages for added, changed, and removed values (dir_content_diff/base_comparators.py, README.md). [1] [2] [3]

Pre-commit and Dependency Updates:

• Updated pre-commit hooks and related dependencies to their latest versions in .pre-commit-config.yaml for improved linting and formatting. [1] [2] [3]
• Added a [dependency-groups] section to pyproject.toml to define development dependencies.

Documentation and Miscellaneous:

• Updated Sphinx intersphinx mapping to reference deepdiff documentation instead of dictdiffer (docs/source/conf.py).
• Fixed a logic bug in dir_content_diff/core.py to properly handle file comparison results (dir_content_diff/core.py).

[Copilot]

Pull request overview

This PR refactors dictionary comparison in dir_content_diff by switching from dictdiffer to deepdiff, improving the formatting of diff reports, and adding numeric tolerance support. It also updates docs/tests accordingly and refreshes development tooling configuration.

Changes:

• Replace dictdiffer-based dict diffs with DeepDiff plus a custom numeric-tolerance operator, and update human-readable diff formatting.
• Fix tree comparison behavior to avoid returning empty raw diff reports as “differences”, and add/adjust tests to cover new behaviors and output.
• Update dependencies, pre-commit hooks, docs intersphinx mapping, and gitignore entries.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
dir_content_diff/base_comparators.py	Migrates dict comparison to DeepDiff, adds numeric tolerance operator, and refactors diff formatting/filtering.
dir_content_diff/core.py	Adjusts handling of file comparison results to avoid treating empty raw diffs as differences.
pyproject.toml	Swaps dictdiffer for deepdiff and adds a dev dependency group.
docs/source/conf.py	Updates intersphinx mapping to DeepDiff documentation.
README.md	Updates example output strings to match the new diff formatting.
tests/test_base.py	Updates and expands tests for DeepDiff output, tolerance semantics, NaN handling, and formatting behavior.
tests/conftest.py	Updates expected diff regex fixtures to match new report formatting.
tests/test_parallel_execution.py	Updates parallel execution tests to reflect removal of dictdiffer positional args usage.
.pre-commit-config.yaml	Bumps pre-commit hook versions for lint/format tooling.
.gitignore	Ignores worktrees directory.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 9 out of 10 changed files in this pull request and generated 1 comment.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (0ab7b64) to head (450ef94).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #106   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           12        12           
  Lines          897       958   +61     
  Branches       146       158   +12     
=========================================
+ Hits           897       958   +61     

Flag	Coverage Δ
pytest	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
dir_content_diff/base_comparators.py	100.00% <100.00%> (ø)
dir_content_diff/core.py	100.00% <100.00%> (ø)