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@@ -14,21 +14,20 @@ name: PR Test - Build Rust Extensions
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# - The artifact hands it to the stages, which the cache cannot: it is best-effort,
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# evictable, and this repo is at its 10 GB limit. Artifacts are durable per run.
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#
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# Two jobs, because only compiling needs the build node: exactly one runner carries
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# that label and it also serves the sgl-kernel and docker builds, so queueing there
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# on a cache hit would put its wait in front of every stage. Republishing bytes
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# needs no particular host - the glibc a module requires is recorded in the module,
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# not decided by whoever uploads it.
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# Compiling is split off from restoring and collecting because only it needs the
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# build node, and queueing there on a cache hit would put that wait in front of
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# every stage. Republishing bytes needs no particular host - the glibc a module
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# requires is recorded in the module, not decided by whoever uploads it.
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on:
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workflow_call:
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inputs:
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runs_on:
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description: 'Runner label for the compile job. Must be self-hosted: its glibc has to satisfy max_glibc, and the cargo build cache needs a persistent ~/.cache.'
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description: 'Runner label for the compile job. Its glibc has to satisfy max_glibc.'
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type: string
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required: true
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restore_runs_on:
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description: 'Runner label for the cache-hit path. Wants free capacity and nothing else, since it neither compiles nor imports the modules.'
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description: 'Runner label for the cache-hit path and the collect job. Wants free capacity and nothing else, since neither compiles nor imports the modules.'
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type: string
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default: ubuntu-latest
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artifact_name:
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@@ -53,7 +52,7 @@ on:
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outputs:
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artifact_name:
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description: 'Artifact holding the built modules. Empty when neither job published one, whether skipped or failed; consumers that still run compile them during install.'
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value: ${{ jobs.restore.outputs.artifact_name || jobs.compile.outputs.artifact_name }}
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value: ${{ jobs.restore.outputs.artifact_name || jobs.collect.outputs.artifact_name }}
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# Reusable workflows do not inherit the caller's env; mirror what
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# check-maintenance reads.
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@@ -127,7 +126,7 @@ jobs:
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|| echo "(gh cache list unavailable: token lacks actions:read)"
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fi
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# No MAX_GLIBC: these are the bytes the compile job already checked before
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# No MAX_GLIBC: these are the bytes the collect job already checked before
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# saving them under this key. The module count is still worth re-checking,
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# so a truncated entry fails here rather than as a test import error.
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- name: Stage modules for upload
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@@ -155,8 +154,16 @@ jobs:
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runs-on: ${{ inputs.runs_on }}
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timeout-minutes: 60
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name: Build Rust Ext
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outputs:
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artifact_name: ${{ steps.publish.outputs.name }}
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# No crate sets abi3, so the pools' interpreters (h100 ships 3.10, h20 ships
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# 3.12) each need their own module set, and each its own target dir, since
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# PyO3's fingerprint tracks the interpreter. The two passes therefore share
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# nothing, which is why they run as parallel jobs rather than back to back.
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strategy:
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# Both legs run to completion, so a failure in one still leaves the other's
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# log to compare against.
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fail-fast: false
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matrix:
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python-version: ['3.10', '3.12']
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steps:
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- uses: actions/checkout@v4
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with:
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@@ -164,19 +171,11 @@ jobs:
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- uses: ./.github/actions/check-maintenance
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# No crate sets abi3, so build one module set per interpreter the pools
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# run (h100 ships 3.10, h20 ships 3.12); EXT_SUFFIX keeps them apart.
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- name: Set up Python 3.10
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id: py310
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- name: Set up Python ${{ matrix.python-version }}
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id: py
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uses: actions/setup-python@v5
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with:
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python-version: '3.10'
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- name: Set up Python 3.12
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id: py312
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uses: actions/setup-python@v5
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with:
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python-version: '3.12'
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python-version: ${{ matrix.python-version }}
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- name: Install protoc and Rust toolchain
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run: bash scripts/ci/utils/install_rust_protoc.sh
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@@ -185,43 +184,35 @@ jobs:
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run: |
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set -euxo pipefail
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export PATH="${CARGO_HOME:-$HOME/.cargo}/bin:${PATH}"
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# Per-interpreter subdirs (set in the loop): PyO3's fingerprint tracks
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# the interpreter, so a shared dir rebuilds on every ABI switch.
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# ci_install_dependency.sh drops ${HOME}/.cache/sglang-cargo-target at 85%
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# disk and unlocks before its own build, so a CUDA job sharing this host
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# can delete the tree mid compile. Build in a per run dir nothing else
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# touches. The .so cache above still carries results across runs.
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cargo_target_root="${RUNNER_TEMP:-/tmp}/sglang-cargo-target-${GITHUB_RUN_ID:-norun}-$$"
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mkdir -p "${cargo_target_root}"
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# A hosted runner is fresh per job, so there is no shared tree to reuse or
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# to guard against a concurrent dropper.
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export CARGO_TARGET_DIR="${RUNNER_TEMP:-/tmp}/sglang-cargo-target-${GITHUB_RUN_ID:-norun}-$$"
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mkdir -p "${CARGO_TARGET_DIR}"
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python3 -m pip install --upgrade pip
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command -v uv >/dev/null 2>&1 || pip install uv
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# build_rust needs the build backend and torch, not sglang's ~294 other runtime deps.
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# Per-job path: these runners are persistent and shared, so a fixed one
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# both inherits the previous job's venv and races a concurrent build.
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venv_root="${RUNNER_TEMP:-/tmp}/sglang-ci-rust-ext-${GITHUB_RUN_ID:-norun}-$$"
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# Per-job path: a self-hosted runs_on is persistent and shared, so a fixed
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# one both inherits the previous job's venv and races a concurrent build.
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venv="${RUNNER_TEMP:-/tmp}/sglang-ci-rust-ext-${GITHUB_RUN_ID:-norun}-$$"
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# Best-effort, like ci_cleanup_venv.sh: under set -e a failing EXIT trap
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# would fail the step, and nothing here is worth keeping for a postmortem.
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trap 'rm -rf "${venv_root}" "${cargo_target_root}" || true' EXIT
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for python_bin in "${{ steps.py310.outputs.python-path }}" "${{ steps.py312.outputs.python-path }}"; do
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minor="$("${python_bin}" -c 'import sys; print(f"{sys.version_info.major}.{sys.version_info.minor}")')"
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export CARGO_TARGET_DIR="${cargo_target_root}/py${minor}"
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venv="${venv_root}/py${minor}"
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uv venv "${venv}" --python "${python_bin}" --seed
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# shellcheck disable=SC1091
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source "${venv}/bin/activate"
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uv pip install "setuptools>=61.0" "setuptools-rust>=1.11" "setuptools-scm>=8.0" "torch==2.13.0" wheel
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# torch-sys resolves libtorch from the active interpreter and bakes that
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# path into the persistent cargo cache. venv_root is per-run and deleted on
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# exit, so a later run reuses a "Fresh torch-sys" whose -L points at a gone
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# directory and fails with "unable to find library -ltorch". Pin LIBTORCH and
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# drop the torch-shim units so they rebuild against this run's venv.
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LIBTORCH="$(python -c 'import pathlib, torch; print(pathlib.Path(torch.__file__).parent)')"
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export LIBTORCH
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export LD_LIBRARY_PATH="${LIBTORCH}/lib:${LD_LIBRARY_PATH:-}"
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cargo clean --release --manifest-path rust/sglang-radix-tree/Cargo.toml \
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-p torch-sys -p sglang-radix-tree 2>/dev/null || true
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(cd python && SGLANG_BUILD_RUST_EXTS=all python setup.py build_rust --inplace)
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python - <<'PY'
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trap 'rm -rf "${venv}" "${CARGO_TARGET_DIR}" || true' EXIT
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# build_rust needs the build backend and torch, not sglang's ~294 other runtime deps.
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uv venv "${venv}" --python "${{ steps.py.outputs.python-path }}" --seed
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# shellcheck disable=SC1091
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source "${venv}/bin/activate"
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uv pip install "setuptools>=61.0" "setuptools-rust>=1.11" "setuptools-scm>=8.0" "torch==2.13.0" wheel
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# torch-sys resolves libtorch from the active interpreter and bakes that
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# path into the cargo cache. venv is per-run and deleted on exit, so a
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# persistent target dir would reuse a "Fresh torch-sys" whose -L points at
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# a gone directory and fail with "unable to find library -ltorch". Pin
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# LIBTORCH and drop the torch-shim units so they rebuild against this venv.
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LIBTORCH="$(python -c 'import pathlib, torch; print(pathlib.Path(torch.__file__).parent)')"
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export LIBTORCH
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export LD_LIBRARY_PATH="${LIBTORCH}/lib:${LD_LIBRARY_PATH:-}"
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cargo clean --release --manifest-path rust/sglang-radix-tree/Cargo.toml \
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-p torch-sys -p sglang-radix-tree 2>/dev/null || true
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(cd python && SGLANG_BUILD_RUST_EXTS=all python setup.py build_rust --inplace)
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python - <<'PY'
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import importlib.util
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import os
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import pathlib
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@@ -290,9 +281,54 @@ jobs:
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inspection.RustUnifiedTreeCoreBinding, "inspect_contains_node"
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)
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PY
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deactivate
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done
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# Both globs sit under python/sglang/srt/, which upload-artifact strips as the
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# common prefix, so the collect job restores them by unpacking back into it.
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- name: Upload this interpreter's modules
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uses: actions/upload-artifact@v4
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with:
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name: ${{ inputs.artifact_name }}-build-py${{ matrix.python-version }}
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path: |
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python/sglang/srt/rust_extensions/_*.so
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python/sglang/srt/mem_cache/rust_tree_core/mem_cache*.so
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if-no-files-found: error
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retention-days: 1
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# The interpreters compile independently, but the suffix-set check and the cache
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# entry both cover the whole set, so they join in one job that sees all of it.
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collect:
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needs: compile
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runs-on: ${{ inputs.restore_runs_on }}
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timeout-minutes: 15
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name: Collect Rust Ext
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outputs:
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# From the last step, so a failed job publishes no name for always() consumers.
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artifact_name: ${{ steps.publish.outputs.name }}
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steps:
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- uses: actions/checkout@v4
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with:
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ref: ${{ inputs.git_ref || github.sha }}
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# Mirrors the restore job: this one writes the entry that job reads, so
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# both have to check out the same set for hashFiles to agree.
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sparse-checkout: |
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rust
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python/setup.py
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python/pyproject.toml
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python/sglang/srt/rust_extensions/torch_build.py
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.github
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scripts/ci/utils
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sparse-checkout-cone-mode: false
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- name: Collect the per-interpreter modules
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uses: actions/download-artifact@v4
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with:
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pattern: ${{ inputs.artifact_name }}-build-py*
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merge-multiple: true
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path: python/sglang/srt
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# First point that sees every interpreter, which is what the suffix-set check
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# compares. MAX_GLIBC belongs here rather than in the restore job: these are
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# freshly compiled bytes, not ones that already passed under this key.
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- name: Verify modules and stage for upload
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env:
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MAX_GLIBC: ${{ inputs.max_glibc }}
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@@ -317,6 +353,7 @@ jobs:
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uses: actions/upload-artifact@v4
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with:
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name: ${{ inputs.artifact_name }}
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# Archive holds package-relative paths, so it unpacks into python/sglang/srt/.
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path: rust-ext-staging/
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if-no-files-found: error
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retention-days: 1
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Ke Bao