mirror of
https://github.com/lancedb/lancedb.git
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7b6ee0d655
Tracks #3324. On x86_64 CPUs without AVX2 (Sandy Bridge / Ivy Bridge / Westmere on Intel; Bulldozer / Piledriver / Steamroller on AMD), `import lancedb` SIGILLs because the wheel bakes AVX2 + FMA into every compiled function. Per [westonpace's review](https://github.com/lancedb/lancedb/issues/3324#issuecomment-4328944354), the default `lancedb` wheel stays fast; pre-Haswell users get a separately-published `lancedb-compat` wheel. ## Summary - Adds a `lancedb-compat` matrix entry to `pypi-publish.yml` that builds with `RUSTFLAGS="-C target-cpu=x86-64-v2"` (Nehalem-class baseline). Same Python API (`import lancedb` works) — files install to the same namespace, so the two wheels conflict at install time and users pick one. Same pattern as `psycopg2` / `psycopg2-binary` and `tensorflow` / `tensorflow-cpu`. - Generalizes `build_linux_wheel` and `upload_wheel` composites with optional `package-name` and `rustflags` inputs (defaults preserve the existing 4 `lancedb` matrix entries verbatim). - Documents the choice in `python/README.md`: `pip install lancedb-compat` for pre-Haswell hosts. The default `.cargo/config.toml` baseline is unchanged. ## Sequencing 1. ~~lance-format/lance#6630 merges → runtime SIMD dispatch lands in lance.~~ **Done — merged.** 2. lancedb's lance dep is bumped to a release that includes it (separate PR / normal cadence). 3. This PR's `lancedb-compat` wheel build path starts producing a wheel that runs on pre-Haswell hardware. **Maintainer setup**: register `lancedb-compat` on PyPI and configure trusted publishing. ## Verified end-to-end on Sandy Bridge Xeon E5-2609 Verification was done locally against a fork-pinned lance dep that includes the runtime dispatch implementation, using the same `RUSTFLAGS="-C target-cpu=x86-64-v2"` flags this PR uses in CI: ``` $ RUSTFLAGS="-C target-cpu=x86-64-v2" maturin build --release $ pip install ./target/wheels/lancedb-*.whl $ python verify.py PASS: import + simd dispatch + table create + vector search all work. ``` Pre-fix on the same CPU (default `pip install lancedb`): `Illegal instruction (core dumped)`. Full reproducer (deps + clone + build + verification): https://gist.github.com/tobocop2/2e341358b55c143527416edfdb1e37df. Fork-internal verification PR with the dep bump and full logs: [`tobocop2/lancedb#2`](https://github.com/tobocop2/lancedb/pull/2). ## Benchmarks — no regressions on modern CPUs from the lance-side change These are the numbers I ran for the lance PR, confirming the runtime dispatch doesn't slow down the default (`target-cpu=haswell`) wheel that existing users install. Criterion, one machine, one session, base → PR, no `RUSTFLAGS` override. Full methodology, null experiments, and logs: [lance-format/lance#6630 benchmark comment](https://github.com/lance-format/lance/pull/6630#issuecomment-4933063394) and the [logs gist](https://gist.github.com/tobocop2/3c6d0f449cbd736aa2501f89a7fe56a2). | benchmark | EPYC 7B13 (`avx2`, `fma`, no `avx512f`) | Xeon Cascade Lake (`avx512f`) | |---|---|---| | `Cosine(f32, scalar)` *(control)* | +0.04% | +0.09% | | `Cosine(f64, scalar)` | −0.34% | −1.94% | | `Cosine(u8, SIMD)` | +2.30% | +3.63% | | `Dot(f16, SIMD)` | −0.58% | +0.61% | | `Dot(f32, SIMD)` | +0.34% | **−6.08%** | | `Dot(f32, arrow_arity)` | +0.02% | −0.00% | | `L2(f32, scalar)` | −0.10% | −0.02% | | `L2(f32, simd)` (dim 1024) | +2.63% | −0.53% | | **`L2(simd,f32x8)` (dim 8)** | **−45.9%** | **−25.1%** | | `L2(u8, SIMD)` | +0.42% | −3.11% | | `NormL2(f32, SIMD)` | −1.02% | −4.17% | | `NormL2(f64, SIMD)` | +3.51% | −0.58% | Nothing regresses beyond the noise floor. Dim 8 — the PQ sub-vector width — improves 25–46%. --- To be transparent: this isn't my domain of expertise and the lance-side implementation is AI-generated. I verified it works end-to-end on the failing hardware. Happy to roll in feedback.
266 lines
9.3 KiB
YAML
266 lines
9.3 KiB
YAML
name: PyPI Publish
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on:
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push:
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tags:
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- 'python-v*'
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pull_request:
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# This should trigger a dry run (we skip the final publish step)
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paths:
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- .github/workflows/pypi-publish.yml
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- .github/workflows/build_linux_wheel/action.yml
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- .github/workflows/build_mac_wheel/action.yml
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- .github/workflows/build_windows_wheel/action.yml
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- Cargo.toml # Change in dependency frequently breaks builds
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- Cargo.lock
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env:
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PIP_EXTRA_INDEX_URL: "https://pypi.fury.io/lance-format/ https://pypi.fury.io/lancedb/"
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permissions:
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contents: read
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jobs:
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linux:
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name: Python ${{ matrix.config.package_name }} ${{ matrix.config.platform }} manylinux${{ matrix.config.manylinux }}
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timeout-minutes: 60
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strategy:
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matrix:
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config:
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- platform: x86_64
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manylinux: "2_28"
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extra_args: "--features fp16kernels"
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runner: ubuntu-22.04
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package_name: "lancedb"
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rustflags: ""
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# For successful fat LTO builds, we need a large runner to avoid OOM errors.
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- platform: aarch64
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manylinux: "2_28"
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extra_args: "--features fp16kernels"
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runner: ubuntu-2404-8x-arm64
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package_name: "lancedb"
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rustflags: ""
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# `lancedb-compat`: pre-Haswell-friendly variant for x86_64 hosts
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# without AVX2 (Sandy Bridge / Ivy Bridge / Westmere on Intel,
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# Bulldozer / Piledriver / Steamroller on AMD). Compiled at the
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# `x86-64-v2` baseline; runtime SIMD dispatch in lance-linalg
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# picks the appropriate tier (scalar / AVX / AVX+FMA / AVX2+FMA
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# / AVX-512) at load time. Same import as `lancedb` -- conflicts
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# at install time, so users pick one.
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- platform: x86_64
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manylinux: "2_28"
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extra_args: ""
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runner: ubuntu-22.04
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package_name: "lancedb-compat"
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rustflags: "-Ctarget-cpu=x86-64-v2"
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runs-on: ${{ matrix.config.runner }}
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steps:
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- uses: actions/checkout@v6
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with:
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fetch-depth: 0
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lfs: true
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- name: Set up Python
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uses: actions/setup-python@v6
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with:
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python-version: "3.10"
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- uses: ./.github/workflows/build_linux_wheel
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with:
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python-minor-version: 10
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args: "--release --strip ${{ matrix.config.extra_args }}"
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arm-build: ${{ matrix.config.platform == 'aarch64' }}
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manylinux: ${{ matrix.config.manylinux }}
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package-name: ${{ matrix.config.package_name }}
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rustflags: ${{ matrix.config.rustflags }}
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- uses: actions/upload-artifact@v7
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if: startsWith(github.ref, 'refs/tags/python-v')
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with:
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name: wheels-linux-${{ matrix.config.package_name }}-${{ matrix.config.platform }}-${{ matrix.config.manylinux }}
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path: target/wheels/*.whl
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if-no-files-found: error
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mac:
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timeout-minutes: 90
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runs-on: ${{ matrix.config.runner }}
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strategy:
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matrix:
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config:
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- target: aarch64-apple-darwin
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runner: warp-macos-14-arm64-6x
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env:
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MACOSX_DEPLOYMENT_TARGET: 10.15
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steps:
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- uses: actions/checkout@v6
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with:
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fetch-depth: 0
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lfs: true
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- name: Set up Python
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uses: actions/setup-python@v6
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with:
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python-version: "3.13"
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- uses: ./.github/workflows/build_mac_wheel
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with:
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python-minor-version: 10
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args: "--release --strip --target ${{ matrix.config.target }} --features fp16kernels"
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- uses: actions/upload-artifact@v7
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if: startsWith(github.ref, 'refs/tags/python-v')
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with:
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name: wheels-mac-${{ matrix.config.target }}
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path: target/wheels/lancedb-*.whl
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if-no-files-found: error
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windows:
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timeout-minutes: 90
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runs-on: windows-latest
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env:
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# link.exe is single-threaded and the long pole on Windows builds. Use
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# rustc's bundled lld-link instead.
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CARGO_TARGET_X86_64_PC_WINDOWS_MSVC_LINKER: rust-lld
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steps:
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- uses: actions/checkout@v6
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with:
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fetch-depth: 0
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lfs: true
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- name: Set up Python
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uses: actions/setup-python@v6
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with:
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python-version: "3.13"
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- uses: ./.github/workflows/build_windows_wheel
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with:
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python-minor-version: 10
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args: "--release --strip"
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- uses: actions/upload-artifact@v7
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if: startsWith(github.ref, 'refs/tags/python-v')
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with:
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name: wheels-windows
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path: target/wheels/lancedb-*.whl
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if-no-files-found: error
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publish:
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name: Publish wheels
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if: startsWith(github.ref, 'refs/tags/python-v')
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needs: [linux, mac, windows]
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runs-on: ubuntu-latest
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permissions:
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id-token: write
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contents: read
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steps:
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- uses: actions/checkout@v6
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- name: Download wheel artifacts
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uses: actions/download-artifact@v8
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with:
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pattern: wheels-*
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path: target/wheels
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merge-multiple: true
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- name: List wheels
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run: ls -la target/wheels
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- name: Choose repo
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id: choose_repo
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run: |
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if [[ ${{ github.ref }} == *beta* ]]; then
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echo "repo=fury" >> $GITHUB_OUTPUT
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else
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echo "repo=pypi" >> $GITHUB_OUTPUT
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fi
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- name: Publish to Fury
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if: steps.choose_repo.outputs.repo == 'fury'
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env:
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FURY_TOKEN: ${{ secrets.FURY_TOKEN }}
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run: |
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shopt -s nullglob
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WHEELS=(target/wheels/*.whl)
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if [[ ${#WHEELS[@]} -eq 0 ]]; then
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echo "No wheels found in target/wheels/" >&2
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exit 1
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fi
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for WHEEL in "${WHEELS[@]}"; do
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echo "Uploading $WHEEL to Fury"
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curl -f -F package=@"$WHEEL" "https://$FURY_TOKEN@push.fury.io/lancedb/"
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done
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# NOTE: pypa/gh-action-pypi-publish must be invoked directly from a
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# workflow file, not from inside a composite action. When called from a
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# composite, `github.action_repository` is empty (actions/runner#2473)
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# and the action falls back to `github.repository`, producing a bogus
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# `docker://ghcr.io/<repo>:<ref>` image reference that GHA tries to pull.
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- name: Publish to PyPI
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if: steps.choose_repo.outputs.repo == 'pypi'
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uses: pypa/gh-action-pypi-publish@release/v1
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with:
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packages-dir: target/wheels/
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gh-release:
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if: startsWith(github.ref, 'refs/tags/python-v')
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runs-on: ubuntu-latest
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permissions:
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contents: write
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steps:
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- uses: actions/checkout@v6
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with:
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fetch-depth: 0
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lfs: true
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- name: Extract version
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id: extract_version
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env:
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GITHUB_REF: ${{ github.ref }}
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run: |
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set -e
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echo "Extracting tag and version from $GITHUB_REF"
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if [[ $GITHUB_REF =~ refs/tags/python-v(.*) ]]; then
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VERSION=${BASH_REMATCH[1]}
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TAG=python-v$VERSION
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echo "tag=$TAG" >> $GITHUB_OUTPUT
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echo "version=$VERSION" >> $GITHUB_OUTPUT
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else
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echo "Failed to extract version from $GITHUB_REF"
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exit 1
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fi
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echo "Extracted version $VERSION from $GITHUB_REF"
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if [[ $VERSION =~ beta ]]; then
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echo "This is a beta release"
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# Get last release (that is not this one)
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FROM_TAG=$(git tag --sort='version:refname' \
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| grep ^python-v \
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| grep -vF "$TAG" \
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| python ci/semver_sort.py python-v \
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| tail -n 1)
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else
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echo "This is a stable release"
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# Get last stable tag (ignore betas)
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FROM_TAG=$(git tag --sort='version:refname' \
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| grep ^python-v \
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| grep -vF "$TAG" \
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| grep -v beta \
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| python ci/semver_sort.py python-v \
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| tail -n 1)
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fi
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echo "Found from tag $FROM_TAG"
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echo "from_tag=$FROM_TAG" >> $GITHUB_OUTPUT
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- name: Create Python Release Notes
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id: python_release_notes
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uses: mikepenz/release-changelog-builder-action@v4
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with:
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configuration: .github/release_notes.json
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toTag: ${{ steps.extract_version.outputs.tag }}
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fromTag: ${{ steps.extract_version.outputs.from_tag }}
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env:
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GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
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- name: Create Python GH release
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uses: softprops/action-gh-release@v2
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with:
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prerelease: ${{ contains('beta', github.ref) }}
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tag_name: ${{ steps.extract_version.outputs.tag }}
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token: ${{ secrets.GITHUB_TOKEN }}
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generate_release_notes: false
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name: Python LanceDB v${{ steps.extract_version.outputs.version }}
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body: ${{ steps.python_release_notes.outputs.changelog }}
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report-failure:
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name: Report Workflow Failure
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runs-on: ubuntu-latest
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needs: [linux, mac, windows, publish]
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permissions:
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contents: read
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issues: write
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if: always() && failure() && startsWith(github.ref, 'refs/tags/python-v')
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steps:
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- uses: actions/checkout@v6
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- uses: ./.github/actions/create-failure-issue
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with:
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job-results: ${{ toJSON(needs) }}
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workflow-name: ${{ github.workflow }}
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