ENH: Add REUSE specification and checks for compliance

[yarikoptic]

Adopt the REUSE specification (https://reuse.software/) so that every file in the repository carries machine-readable copyright and license information. reuse lint now reports 246/246 files compliant.

Changes:

• LICENSES/ — full SPDX license texts (downloaded via reuse download):

  • Apache-2.0.txt — project license
  • Unlicense.txt — vendored python-versioneer
  • BSD-2-Clause.txt — vendored duecredit stub (dandi/due.py)

• REUSE.toml — three annotation blocks:

  • default precedence = "aggregate" over ** → Apache-2.0, "2019-2026 DANDI developers team@dandiarchive.org"
  • precedence = "override" for versioneer.py and dandi/_version.py → Unlicense (public domain, per upstream)
  • precedence = "override" for dandi/due.py → BSD-2-Clause, "2015-2019 DueCredit developers" (matches the in-file header from upstream)

• .gitignore — add .mypy_cache/, .pytest_cache/, .ruff_cache/, .venv*/ so transient build/test artifacts are not picked up by reuse lint (REUSE 3.x honors .gitignore; no .reuseignore is needed).

• Build-system integration:

  • tox.ini — new [testenv:reuse] running reuse lint
  • .pre-commit-config.yaml — add fsfe/reuse-tool hook (v5.0.2)
  • .github/workflows/lint.yml — new reuse job using fsfe/reuse-action@v5

The existing root LICENSE file is left in place: it remains the canonical reference from pyproject.toml and is the file PyPI/GitHub display by default. LICENSES/Apache-2.0.txt is its REUSE-shaped counterpart.

This change was prepared with the reuse-compliance skill currently under review at

• skills: github-project-status auto-detect, pr-feedback-review companion auth, new introduce-reuse-compliance con/skills#3

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.26%. Comparing base (8837d7a) to head (5ad8d8d).
⚠️ Report is 11 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1844   +/-   ##
=======================================
  Coverage   76.26%   76.26%           
=======================================
  Files          87       87           
  Lines       12486    12486           
=======================================
  Hits         9523     9523           
  Misses       2963     2963           

Flag	Coverage Δ
unittests	76.26% <ø> (ø)

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[CodyCBakerPhD]

What joy, 'one more' config file for the outer level 😆

[CodyCBakerPhD]

I love to see this, but will you ever let me fully enable the pre-commit.ci bot so I can be absolutely positive this is passing without any extra steps?

[CodyCBakerPhD]

I do see https://github.com/dandi/dandi-cli/actions/runs/25110788921/job/73583956810?pr=1844 but now there's like at least 3 or 4 different action runs that could all be one single CI

[CodyCBakerPhD]

Some comments above

Only one blocking question if we should fill in that one placeholder on the BSD-2? Technically the .toml links in a roundabout way to the specific software that needs it, but it still reads oddly as a license (doesn't feel quite legally binding at that point)

[yarikoptic]

as I commented on -- I would not bother expanding on copyright in "LICENSES/" folder.

[github-actions]

🚀 PR was released in 0.75.1 🚀