feat: add the zarr-indexing package (TensorStore-style index transforms, ndsel wire format) - #249
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d-v-b wants to merge 4 commits into
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feat: add the zarr-indexing package (TensorStore-style index transforms, ndsel wire format)#249d-v-b wants to merge 4 commits into
d-v-b wants to merge 4 commits into
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Standalone workspace package extracted from the lazy-indexing branch (zarr-developers#3906): composable, lazy coordinate transforms (IndexTransform / IndexDomain / output maps), dependency-aware chunk resolution against a DimensionGridLike protocol, and an ndsel-conformant JSON wire format validated against the vendored conformance corpus. zarr itself does not depend on zarr-indexing yet — the runtime wiring lands separately once 0.1.0 is published. The package is numpy-only; its tests exercise chunk resolution against zarr's concrete ChunkGrid, so they run from the workspace root (uv sync --all-packages). Assisted-by: ClaudeCode:claude-fable-5
Assisted-by: ClaudeCode:claude-fable-5
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Adds
zarr-indexingas a standalone uv-workspace package (packages/zarr-indexing, import namezarr_indexing), without wiring it into zarr's runtime — per the land-the-package-first sequencing. The runtime integration (lazy.lazyindexing, transform-routed selection I/O) stays onrefactor/simplify-indexing(zarr-developers#3906) and will gain thezarr-indexing>=0.1.0dependency only after 0.1.0 is on PyPI.What the package is
IndexTransform/IndexDomain/ three output-map kinds, full-input-rank index arrays with dependency-axis-derived correlation (oindex outer-product vs vindex broadcast), composition, literal-coordinate slice semantics verified against tensorstore 0.1.84.DimensionGridLikeprotocol (public-name-only contract; zarr's per-dimension grids satisfy it structurally, no zarr import). Includes the touched-chunks-only enumeration and the sorted-1-D fast path from perf(zarr-transforms): partition sorted 1-D array maps by chunk #234.parse_ndsel/normalize_ndselimplement the ndsel draft spec (all five message kinds, canonical normalize, full error taxonomy), validated against the byte-vendored conformance corpus plus a tensorstoreIndexTransform(json=...)round-trip cross-check.Contents
packages/zarr-indexing/— sources, tests (273, all green againstmain's zarr), vendored ndsel corpus with provenance, own towncrier changelog..github/workflows/zarr-indexing.yml— pytest (3.12–3.14) / ruff / pyright, paths-filtered; test job usesuv sync --all-packagessince zarr does not depend on the package here..github/workflows/zarr-indexing-release.yml— tag-triggered (zarr_indexing-v*) TestPyPI/PyPI publish with attestation and an isolated-wheel smoke test; byte-identical to the zarr-metadata release flow modulo the package name. A local dress rehearsal of the tagged build produced exactly0.1.0and the wheel imports with no zarr installed.check_changelogs.yml— covers the package'schanges/dir.pyproject.toml— uv workspace membership only (no runtime dependency).Sequencing
zarr-indexing→ pushzarr_indexing-v0.1.0.History note: files were developed on the zarr-developers#3906 branch (with per-commit review);
git log --followtraces their evolution there.