April 17-23, 2022 in Darker: Configuration Refinements and Exclusion Patterns

[akaihola]

This week, we focused on addressing configuration challenges and improving file exclusion handling in Darker. We opened a discussion on allowing arbitrary arguments to Black (#351), which could potentially enable users to pass options like --preview directly to Black. This feature would provide more flexibility in configuring Darker's behavior and is related to ongoing efforts to improve configuration in monorepo structures (#244).

We also investigated issues with exclusion patterns, particularly in the context of pre-commit hooks and monorepo layouts. A user reported that Darker's pre-commit hook wasn't respecting Black's folder ignore configuration (#351), prompting a review of our exclusion handling. This led to a broader discussion on how Darker should handle file exclusions, with a suggestion to add support for Black's extend-exclude option (#181). These conversations highlight the need to align Darker's exclusion behavior more closely with Black's, especially in complex project structures.

In other developments, we added support for the NO_COLOR environment variable (#355), complementing the previously implemented PY_COLORS option. This change allows users to disable syntax highlighting by setting NO_COLOR to any non-empty value, with PY_COLORS taking precedence. These improvements aim to enhance Darker's usability and consistency with other tools in the Python ecosystem.

---

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