Use new constraints type from DFG

[KyleFromNVIDIA]

Description

As of rapids-dependency-file-generator v1.22.0, a new output type, constraints, is supported, allowing constraints to be separated from requirements. Use this where possible.

For now, be overzealous in turning on constraints wherever requirements is used. If we ever run into issues with constraints having extras, we can deal with it at that time.

Contributes to rapidsai/build-planning#311

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: b1e3bbf4-0fad-4a96-b38b-2eabffd34fdc

📥 Commits

Reviewing files that changed from the base of the PR and between 6cde5e1 and 6f8067c.

📒 Files selected for processing (8)

• .pre-commit-config.yaml
• ci/cudf_pandas_scripts/run_tests.sh
• ci/test_cudf_polars_polars_tests.sh
• ci/test_wheel_cudf.sh
• ci/test_wheel_cudf_polars.sh
• ci/test_wheel_cudf_streaming.sh
• ci/test_wheel_dask_cudf.sh
• dependencies.yaml

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes

  • Improved generation and placement of Python dependency constraints across build, runtime, testing, CUDA, and compatibility configurations.
  • Updated continuous integration checks to consistently use the generated constraints, improving dependency resolution and test reliability.
  • Corrected pip dependency output handling, including package and extra-index configuration.

• Chores

  • Updated dependency-generation tooling.
  • Refreshed copyright notices through 2026.

Walkthrough

Changes

Constraints output generation

Layer / File(s)	Summary
Dependency output declarations .pre-commit-config.yaml, dependencies.yaml	The dependency-file-generator uses v1.22.0. Build and runtime groups now include constraints outputs.
Testing and specialized dependency outputs dependencies.yaml	Testing, package, compatibility, index, Ray, and Dask CUDA groups now emit constraints outputs with updated pip mappings.
CI constraints generation wiring ci/*.sh	CI scripts pass constraints to rapids-generate-pip-constraints. Selected SPDX notices include affiliates and 2026.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Possibly related PRs

• rapidsai/cudf#23305: Updates dependency-generation configuration in a related dependency configuration change.
• rapidsai/cudf#23339: Contains a successive update to the dependency-file-generator revision.
• rapidsai/cudf#23516: Contains related depends_on_dask_cuda pip constraints changes.

Suggested labels: Python, cudf-polars

Suggested reviewers: vyasr, gforsyth, msarahan

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the primary change: adopting the new constraints output type from the dependency file generator.
Description check	✅ Passed	The description directly explains the constraints output changes and identifies the related dependency file generator update.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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