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feat: USE_LAKE_CACHE CMake option (#10708)

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This PR adds the `USE_LAKE_CACHE` option to the core CMake build
(defaults to `OFF`). When enabled, the Lake artifact cache will be
enabled (via `enableArtifactCache`) for stage 1 builds (which includes
interactive use).
This commit is contained in:
Mac Malone 2025-10-08 04:56:53 -04:00 • committed by GitHub
parent 4e7a2b2371
commit bbc194b733
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GPG key ID: B5690EEEBB952194
2 changed files with 10 additions and 2 deletions
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8
src/CMakeLists.txt
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@ -82,6 +82,7 @@ option(USE_MIMALLOC "use mimalloc" ON)
# development-specific options
option(CHECK_OLEAN_VERSION "Only load .olean files compiled with the current version of Lean" OFF)
option(USE_LAKE "Use Lake instead of lean.mk for building core libs from language server" ON)
option(USE_LAKE_CACHE "Use the Lake artifact cache for stage 1 builds (requires USE_LAKE)" OFF)
set(LEAN_EXTRA_MAKE_OPTS "" CACHE STRING "extra options to lean --make")
set(LEANC_CC ${CMAKE_C_COMPILER} CACHE STRING "C compiler to use in `leanc`")
@ -826,10 +827,13 @@ if(LEAN_INSTALL_PREFIX)
set(CMAKE_INSTALL_PREFIX "${LEAN_INSTALL_PREFIX}/lean-${LEAN_VERSION_STRING}${LEAN_INSTALL_SUFFIX}")
endif()
if (STAGE GREATER 1)
if (USE_LAKE_CACHE AND STAGE EQUAL 1)
set(LAKE_ARTIFACT_CACHE_TOML "true")
else()
# The build of stage2+ may depend on local changes made to src/ that are not reflected by the
# commit hash in stage1/bin/lean, so we make sure to disable the global cache
string(APPEND LEAN_EXTRA_LAKEFILE_TOML "\n\nenableArtifactCache = false")
set(LAKE_ARTIFACT_CACHE_TOML "false")
endif()
# Escape for `make`. Yes, twice.

4
src/lakefile.toml.in
View file

@ -16,6 +16,10 @@ buildType = "${CMAKE_BUILD_TYPE_TOML}"
# The root of all the compiler output directories
buildDir = "${CMAKE_BINARY_DIR}"
# Enables the Lake artifact cache if configured via CMake
# (i.e., for stage 1 when the CMake `USE_LAKE_CACHE` option is set).
enableArtifactCache = ${LAKE_ARTIFACT_CACHE_TOML}
# Ensure build artifacts end up in the build directory even when the Lake
# local artifact cache is enabled. This is necessary because subsequent stages
# will expect the previous stage's artifacts to be in the build directory.