build(server): retrieval deps + image, and the element view they feed - #249
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…nto the image Phase 0 of the retrieval plan. liteparse 2.14 ships cp310-abi3 wheels for both manylinux arches, so the block extractor no longer pins a single CPython — the 3.12 default from 270efb1 stays, but requires-python >=3.10 remains honest. The image now carries the two things a first request must not have to fetch: `tesseract-ocr-eng` (4 MB) for liteparse's OCR path and the DuckDB `lance` community extension (231 MB), installed as `extralit` so it lands in the home DuckDB resolves against. `smoke_retrieval_deps.py` asserts all four in CI right after the existing CLI check; image grows 1.55 GB -> 1.8 GB, 92% of it the extension binary. chonkie requires httpx>=0.28.1, which removes `AsyncClient(app=...)` and encodes `json=` with allow_nan=False. Both conftests move to `ASGITransport`, and the three tests that deliberately post NaN metadata now send it as `content=` — otherwise the client rejects the payload the server is supposed to 422 on.
A release builds linux/amd64,linux/arm64 on one amd64 runner via setup-qemu-action, so the non-native stage runs under qemu-user — where `import duckdb` segfaults before it can execute anything. `RUN python -c "import duckdb; ... INSTALL lance"` would therefore have failed every multi-arch release build. `install_lance_extension.py` reads the version from package metadata and downloads the extension for the stage's own architecture, never loading the native module. Verified both ways in one emulated x86_64 container: the script wrote the 254 MB linux_amd64 extension while `import duckdb` core-dumped beside it. The extension CDN 403s the default Python-urllib agent, hence the explicit one. `LOAD lance` in the smoke script is what proves the manual placement matches the path DuckDB resolves.
The builder was one RUN that copied the wheel, then ran apt-get update/upgrade/install, the install, and an apt-get purge. Because `COPY dist/*.whl` sat above it, a wheel change — the only input that differs between two builds of the same tree — invalidated the whole apt cycle. Measured on the same changed wheel: the old layout re-runs `python -m venv` and the full apt install/purge; the new one keeps both apt layers and the venv CACHED and re-runs only from the wheel COPY down. apt now stands alone at the top of the stage, and gcc/libc6-dev are simply left there rather than purged: the runtime image copies nothing out of the builder but /opt/venv, so there is no toolchain to remove (verified absent from the final image). From the uv Docker guide: UV_COMPILE_BYTECODE, UV_LINK_MODE=copy (the cache mount is a different filesystem from /opt/venv), UV_PYTHON_DOWNLOADS=0, VIRTUAL_ENV, and the cache mount moved to /root/.cache/uv to match UV_CACHE_DIR in a stage that has no extralit user. Bytecode compilation costs 150 MB (1.8 -> 1.95 GB) and halves cold start: importing extralit_server goes 23.0s -> 12.5s, paid back on every worker and every Space wake. `uv venv --seed`, not `uv venv`: extralit-hf-space derives from this image and installs into this venv with `pip`, which a default uv venv does not create.
…table header First slice of Phase 1. `elements_from_items` is the inverse of `arrow.item_rows`: it reads the Lance rows back as the three units a chunker dispatches on — markdown, table, figure — so chunking can re-run from the dataset without re-parsing the PDF, and `contexts/retrieval` never has to know a docling label. Decisions the rows forced: - One element per provenance row, not per item, so an item spanning a page break stays two elements with two bboxes instead of one claiming to be in two places. Text is sliced by charspan when an item has several provenances. - Captions are consumed by the nearest figure or table on the same page, either side of it: nothing here links a PictureItem to its caption, and geometric parsers order them both ways. A caption with no figure on its page survives as prose rather than being dropped. - An uncaptioned figure produces no element. There is nothing retrievable in it. - page_header/page_footer are dropped; running furniture is repeated on every page and retrievable on none. - Headings render as ATX markdown so the recursive chunker's line-anchored rules can split on them, and each element carries its breadcrumb. A title holds a slot above every section header whatever its level, so `Results` closes `Methods` without closing the title. `table_html` replaces docling's exporter, which puts the header's `<th>` cells inside `<tbody>` — a header a row-window chunk cannot find is a header it cannot repeat. The layout API's `html` field changes shape with it; no frontend reads it and the OpenAPI type is unchanged.
…v, drop the conda vars The 231 MB extension was fetched in the final stage, below the venv COPY, so every one-line code change rebuilt and re-exported it. It now has its own stage above everything that varies per build: a wheel change leaves both the fetch and its COPY CACHED, and BuildKit runs the fetch in parallel with the wheel install. Incremental rebuild 30s -> 27s locally, and the big layer stops churning through the registry on CI. That needs the duckdb version before the venv exists, so DUCKDB_VERSION is an ARG. The pin is kept honest by `--check`, which compares it against the venv's resolved duckdb from package metadata (no native import, so it survives the emulated arch of a release build) and fails the build rather than shipping an image whose first hybrid search cannot find the extension. Verified by building with a deliberately wrong pin. Also: uv 0.7.12 -> 0.12.6; MAMBA_ROOT_PREFIX and CONDA_PREFIX dropped, vestiges of a micromamba base that nothing in either repo reads; the wheel is bind-mounted rather than copied, so no copy of it is left in the builder; and a .dockerignore allowlists the context down to the wheel and two scripts.
Roborev, Critical, jobs #379 and #382. The build fetched a native DuckDB extension over plaintext HTTP with no integrity check, and the server later loads that extension into its own process — so anything able to answer for extensions.duckdb.org could put native code inside the server. The fetch is now HTTPS, and the decompressed payload's sha256 is checked against a pin kept per duckdb version and target platform before a single byte is written. The two pinned digests were confirmed against the extension already baked into a built image, not just against a fresh download of themselves. It fails closed in both directions: a duckdb version with no pinned digest aborts the build rather than trusting whatever the repository serves, and a mismatch refuses to write. Verified all three paths — happy path, unpinned version, doctored digest (zero files written). Bumping DUCKDB_VERSION now also means adding a digest; `--digest` prints what the repository is currently serving, to be confirmed independently before pinning.
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Pro Plus Run ID: 📒 Files selected for processing (2)
Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe change adds typed OCR element projection and custom table HTML rendering. It adds retrieval dependencies and validates their Docker image payloads. It also updates HTTP test transports and NaN request serialization. ChangesOCR element projection
Retrieval image payloads
Test compatibility updates
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🔵 Low · up to The server image now carries retrieval dependencies, OCR data, and native database code for every deployment. Integrity checks and build validation reduce direct tampering and compatibility risk, but the broader runtime footprint adds a bounded supply-chain and patching burden that should remain explicit owner follow-up; the PR is otherwise mergeable. Sequence Diagram(s)sequenceDiagram
participant item_rows
participant elements_from_items
participant table_html
participant Element
item_rows->>elements_from_items: document item rows
elements_from_items->>table_html: table item data
table_html-->>elements_from_items: serialized table HTML
elements_from_items->>Element: rendered element with metadata
sequenceDiagram
participant DockerBuild
participant install_lance_extension
participant ServerImage
participant smoke_retrieval_deps
DockerBuild->>install_lance_extension: download and verify Lance
install_lance_extension-->>DockerBuild: verified extension
DockerBuild->>ServerImage: assemble runtime image
ServerImage->>smoke_retrieval_deps: run retrieval payload checks
smoke_retrieval_deps-->>ServerImage: pass or fail result
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Description checkExplanation The description is detailed and on-topic. It explains the dependencies, Docker changes, element view, testing, verification results, and known pre-existing failures. Some template sections, such as related tickets, PR type checkboxes, documentation status, and changelog checklist, are not explicitly completed, but the substantive information is complete.
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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In `@extralit-server/src/extralit_server/contexts/ocr/elements.py`:
- Around line 154-155: Update the table handling branch in the element
conversion logic to retain the caption consumed by _captionable: prepend
captions.get(index) to the table content as escaped semantic <caption>
markup while preserving the existing table HTML. Extend
TestCaptions.test_a_caption_preceding_its_figure to assert that the retained
caption text is present in the emitted table element.
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.github/workflows/extralit-server.build-docker-images.ymlextralit-server/docker/server/.dockerignoreextralit-server/docker/server/Dockerfileextralit-server/docker/server/scripts/install_lance_extension.pyextralit-server/docker/server/scripts/smoke_retrieval_deps.pyextralit-server/pyproject.tomlextralit-server/src/extralit_server/contexts/ocr/arrow.pyextralit-server/src/extralit_server/contexts/ocr/elements.pyextralit-server/tests/integration/conftest.pyextralit-server/tests/unit/api/handlers/v1/test_datasets.pyextralit-server/tests/unit/conftest.pyextralit-server/tests/unit/contexts/ocr/test_elements.py
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Addresses CodeRabbit on PR #249, and it is a real loss. `_captionable` matches tables as well as figures, so a caption next to a table was consumed out of the markdown stream — but the table branch emitted only `row["html"]`, which never carried it. "Table 1. Prevalence by district." disappeared from the document entirely, and a table's caption is usually the only prose saying what the table is of. The caption now folds into the markup as `<caption>`, escaped, as the first child of `<table>` — the one position HTML allows it, so a row-window chunk can repeat it alongside the header. A table that produced no markup keeps its caption as bare text rather than dropping both. My own test is what let this through: it asserted the element *type* was `table` and never looked at the content. It now asserts the retained text, joined by cases for caption placement, escaping, and the no-markup fallback.
extralit-hf-space#12 merged as a05a1c0, so the pointer moves off the pin it had been stuck on for ten commits. That merge was supposed to unblock dropping `--seed` from `uv venv`, since hf-space no longer installs with pip. Measured, it does not. Removing the seed does not remove pip from the image: `pip` simply falls through to the base image's /usr/local/bin/pip, which installs into /usr/local/lib/python3.12/site-packages while `python` stays /opt/venv/bin/python. So a derived image running `pip install X` — exactly what hf-space did until yesterday — would install X somewhere the interpreter cannot see it, and fail at import rather than at install. The whole trade is 5.4 MB of 1847. Not worth handing that to the next person who extends this image, so `--seed` stays and the comment now records the real reason rather than a dependency that no longer exists.
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Groundwork for hybrid search over the layout store: the dependencies and image payloads the
retrieval pipeline needs, the Docker changes to make rebuilding it cheap, and the first slice
of the element view that chunking will consume.
Dependencies
liteparseandchonkie, plus four transitive packages. liteparse 2.14 ships cp310-abi3wheels for both manylinux arches, so the block extractor is no longer tied to one CPython —
the 3.12 default stays, but
requires-python >=3.10stays honest.chonkie forces
httpx>=0.28.1, which removesAsyncClient(app=...)and encodesjson=withallow_nan=False. Both conftests move toASGITransport, and the three tests thatdeliberately POST NaN metadata now send it via
content=— otherwise the client rejects thepayload the server is supposed to 422 on.
Image
Two payloads are baked in so no first request has to fetch them:
tesseract-ocr-engforliteparse's OCR path, and the DuckDB
lancecommunity extension.smoke_retrieval_deps.pyasserts all four in CI right after the existing CLI check.
Three things fell out of building it:
INSTALL lancecannot run at build time. A release buildslinux/amd64,linux/arm64onone amd64 runner via QEMU, and
import duckdbsegfaults under qemu-user — so the obviousRUN python -c "import duckdb; ... INSTALL lance"would have broken every multi-archrelease. It is now a plain fetch that never loads the native module, proven in a single
emulated x86_64 container where the script wrote the 254 MB amd64 extension while
import duckdbcore-dumped beside it.The extension is native code the server loads in-process, so it is fetched over HTTPS and
its sha256 checked against a per-version, per-platform pin before anything is written. Fails
closed both ways: an unpinned duckdb version aborts the build, a digest mismatch writes zero
files. (Roborev Critical, jobs #379/#382.)
The builder was defeating its own layer cache.
COPY dist/*.whlsat above a single RUNthat also did
apt-get update/upgrade/install/purge, so the wheel — the only input thatchanges between builds — re-ran the whole apt cycle. Split apart, plus the uv Docker guide's
UV_COMPILE_BYTECODE/UV_LINK_MODE=copy/UV_PYTHON_DOWNLOADS=0, uv 0.12.6, abind-mounted wheel, and a
.dockerignore. The 231 MB extension moved into its own stageabove everything that varies per build.
Measured, on a genuinely-changed wheel: apt and venv layers now stay
CACHED, the extensionlayer stops churning, incremental rebuild 30s → 27s. Bytecode costs 150 MB and halves cold
start (importing
extralit_server23.0s → 12.5s), which is paid back on every worker start.Image 1.55 GB → 1.94 GB, 231 MB of it the extension.
uv venv --seed, notuv venv. This originally read "drop it onceExtralit/extralit-hf-space#12 merges". #12 has merged, and the measurement says don't: removing
the seed does not remove pip, it makes
pipfall through to the base image's/usr/local/bin/pip, which installs into/usr/local/lib/python3.12/site-packageswhilepythonstays/opt/venv/bin/python. A derived image doingpip install Xthen fails atimport rather than at install. The saving is 5.4 MB of 1847, so
--seedstays.Elements
elements_from_itemsreads the Lanceitemsrows back as the three units a chunker dispatcheson, so chunking can re-run from the dataset without re-parsing the PDF. Decisions the rows
forced: one element per provenance row (a page-spanning item keeps two bboxes, text sliced by
charspan); captions absorbed by the nearest figure/table on the same page, either side;
uncaptioned figures produce nothing;
page_header/page_footerdropped.table_htmlreplaces docling's exporter, which puts header<th>cells inside<tbody>— aheader a row-window chunk cannot find is one it cannot repeat. This changes the
htmlvalueon
GET /documents/{id}/layout; no frontend reads it and the OpenAPI type is unchanged.Verification
test_jwt/test_settingsare pre-existing andunrelated — confirmed identical on the pre-change lock (
secret_keyis 44 chars, the testasserts 32).
tests/unit/contexts/ocr./packagesleakage.The amd64 image could not be built here (duckdb segfaults under emulation regardless of
these changes); CI builds amd64 natively. CI's smoke step only exercises the native arch.
lancepayload URLs confirmed to exist for amd64 and arm64.Notes for review
not in this PR.
.github/workflowsgains one smoke step. The workflow still sets no buildxcache-from/cache-to, so none of the caching above applies on CI yet — worth doing separately, butmode=maxon a 1.94 GB image risks the 10 GB Actions cache quota.Summary by CodeRabbit
New Features
Bug Fixes
Tests