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sglang/scripts/ci/cuda/ci_download_flashinfer_jit_cache.sh
2026-03-20 21:36:58 -07:00

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#!/bin/bash
# Install flashinfer-jit-cache with caching and retry logic (flashinfer.ai can have transient DNS issues).
# The jit-cache wheel is 1.2+ GB, so we skip the download entirely if already installed.
#
# Required environment (caller must export or set):
# UNINSTALL_JIT_CACHE — literal true/false (skip download when false)
# FLASHINFER_PYTHON_REQUIRED — e.g. from python/pyproject.toml (flashinfer_python)
# CU_VERSION — e.g. cu129
# PIP_CMD — e.g. "pip" or "uv pip"
# PIP_INSTALL_SUFFIX — extra pip args for this runner
set -euxo pipefail
: "${UNINSTALL_JIT_CACHE:?must be set}"
: "${FLASHINFER_PYTHON_REQUIRED:?must be set}"
: "${CU_VERSION:?must be set}"
: "${PIP_CMD:?must be set}"
FLASHINFER_JIT_CACHE_INSTALLED=false
if [ "$UNINSTALL_JIT_CACHE" = false ]; then
FLASHINFER_JIT_CACHE_INSTALLED=true
echo "flashinfer-jit-cache already at correct version, skipping download"
fi
if [ "$FLASHINFER_JIT_CACHE_INSTALLED" = false ]; then
FLASHINFER_CACHE_DIR="${HOME}/.cache/flashinfer-wheels"
mkdir -p "${FLASHINFER_CACHE_DIR}"
find "${FLASHINFER_CACHE_DIR}" -name "flashinfer_jit_cache-*.whl" ! -name "flashinfer_jit_cache-${FLASHINFER_PYTHON_REQUIRED}*" -type f -delete 2>/dev/null || true
FLASHINFER_WHEEL_PATTERN="flashinfer_jit_cache-${FLASHINFER_PYTHON_REQUIRED}*.whl"
CACHED_WHEEL=$(find "${FLASHINFER_CACHE_DIR}" -name "${FLASHINFER_WHEEL_PATTERN}" -type f 2>/dev/null | head -n 1)
if [ -n "$CACHED_WHEEL" ] && [ -f "$CACHED_WHEEL" ]; then
echo "Found cached flashinfer wheel: $CACHED_WHEEL"
if $PIP_CMD install "$CACHED_WHEEL" $PIP_INSTALL_SUFFIX; then
FLASHINFER_JIT_CACHE_INSTALLED=true
echo "Successfully installed flashinfer-jit-cache from cache"
else
echo "Failed to install from cache, will try downloading..."
rm -f "$CACHED_WHEEL"
fi
fi
if [ "$FLASHINFER_JIT_CACHE_INSTALLED" = false ]; then
for i in {1..5}; do
# Download wheel to cache directory (use pip directly as uv pip doesn't support download)
if timeout 600 pip download "flashinfer-jit-cache==${FLASHINFER_PYTHON_REQUIRED}" \
--index-url "https://flashinfer.ai/whl/${CU_VERSION}" \
-d "${FLASHINFER_CACHE_DIR}"; then
CACHED_WHEEL=$(find "${FLASHINFER_CACHE_DIR}" -name "${FLASHINFER_WHEEL_PATTERN}" -type f 2>/dev/null | head -n 1)
if [ -n "$CACHED_WHEEL" ] && [ -f "$CACHED_WHEEL" ]; then
if $PIP_CMD install "$CACHED_WHEEL" $PIP_INSTALL_SUFFIX; then
FLASHINFER_JIT_CACHE_INSTALLED=true
echo "Successfully downloaded and installed flashinfer-jit-cache"
break
fi
else
echo "Warning: Download succeeded but wheel file not found"
fi
fi
echo "Attempt $i to download flashinfer-jit-cache failed, retrying in 10 seconds..."
sleep 10
done
fi
fi
if [ "$FLASHINFER_JIT_CACHE_INSTALLED" = false ]; then
echo "ERROR: Failed to install flashinfer-jit-cache after 5 attempts"
exit 1
fi