b161f2a059
Initial release. Statically vendors libgit2 v1.7.2 (HTTPS-only via WinHTTP on Windows, no SSH dependency); exposes synchronous clone, checkout, fetch, describe, has_ref, is_repo, tags plus an async start_ls_remote_tags / is_done / take_result triple routed through the engine async-pool. The native-lib loader resolves engine services through the sporel_engine_api struct passed to sporel_lib_init, so this lib does not statically depend on internal engine symbols beyond the Lua C-API re-exports. Smoke-tested against a public Gitea repo: clone over HTTPS succeeds, async ls-remote returns the tag list, all C-allocations clean up via git_*_free / git_buf_dispose. First clean build of libgit2 takes ~5-15 min on a typical machine; cached afterwards.
111 lines
4.5 KiB
CMake
111 lines
4.5 KiB
CMake
cmake_minimum_required(VERSION 3.20)
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project(sporel_lib_core_git LANGUAGES C)
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# -----------------------------------------------------------------------------
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# Vendor libgit2 v1.7.2 — static, HTTPS-only, no SSH, no CLI, no tests.
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# HTTPS backend: WinHTTP on Windows; libgit2 picks it automatically when
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# USE_HTTPS=ON and BUILD_SHARED_LIBS=OFF. See ADR-0047.
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# First fetch + build takes ~5-15 min; subsequent builds are fast.
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# -----------------------------------------------------------------------------
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include(FetchContent)
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set(BUILD_CLI OFF CACHE BOOL "" FORCE)
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set(BUILD_TESTS OFF CACHE BOOL "" FORCE)
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set(BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
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set(USE_SSH OFF CACHE BOOL "" FORCE) # HTTPS-only per spec
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set(USE_HTTPS ON CACHE BOOL "" FORCE)
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set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE) # static
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set(REGEX_BACKEND builtin CACHE STRING "" FORCE)
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FetchContent_Declare(
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libgit2
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GIT_REPOSITORY https://github.com/libgit2/libgit2.git
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GIT_TAG v1.7.2)
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FetchContent_MakeAvailable(libgit2)
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# -----------------------------------------------------------------------------
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# Lua headers: reused from the engine's FetchContent cache (the same Lua
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# VM Sporel.exe boots into; no separate Lua build for the lib). At runtime,
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# Lua C-API symbols (lua_*, luaL_*) are resolved against the re-exports
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# in sporel_engine.dll (per ADR-0023).
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#
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# At link time on MinGW we need an import library that resolves those
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# symbols; we use libsporel_engine.dll.a from the engine's build tree.
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# Caller MUST set both -DLUA_INCLUDE_DIR_HINT and -DSPOREL_ENGINE_BUILD_HINT.
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# -----------------------------------------------------------------------------
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if(NOT DEFINED LUA_INCLUDE_DIR_HINT)
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set(LUA_INCLUDE_DIR_HINT
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"$ENV{HOME}/Projects/Sporel/sporel-engine/build/_deps/lua-src/src")
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endif()
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if(NOT DEFINED SPOREL_ENGINE_BUILD_HINT)
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set(SPOREL_ENGINE_BUILD_HINT
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"$ENV{HOME}/Projects/Sporel/sporel-engine/build")
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endif()
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if(NOT DEFINED SPOREL_ENGINE_INCLUDE_HINT)
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set(SPOREL_ENGINE_INCLUDE_HINT
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"$ENV{HOME}/Projects/Sporel/sporel-engine/include")
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endif()
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if(NOT DEFINED SPOREL_ENGINE_SRC_HINT)
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# engine_async.h lives in src/ (private engine headers). Native libs
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# that use the async-pool need this for the sporel_async_handle and
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# sporel_async_work_fn typedefs — though engine_api.h re-declares them.
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set(SPOREL_ENGINE_SRC_HINT
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"$ENV{HOME}/Projects/Sporel/sporel-engine/src")
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endif()
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find_path(LUA_INCLUDE_DIR lua.h HINTS ${LUA_INCLUDE_DIR_HINT})
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if(NOT LUA_INCLUDE_DIR)
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message(FATAL_ERROR
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"sporel_git: could not find lua.h. Pass "
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"-DLUA_INCLUDE_DIR_HINT=/path/to/sporel-engine/build/_deps/lua-src/src "
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"(default = ~/Projects/Sporel/sporel-engine/build/_deps/lua-src/src).")
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endif()
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find_library(SPOREL_ENGINE_IMPLIB
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NAMES sporel_engine libsporel_engine
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HINTS ${SPOREL_ENGINE_BUILD_HINT}
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NO_DEFAULT_PATH)
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if(NOT SPOREL_ENGINE_IMPLIB)
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message(FATAL_ERROR
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"sporel_git: could not find libsporel_engine.dll.a in "
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"${SPOREL_ENGINE_BUILD_HINT}. Build the engine first.")
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endif()
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# -----------------------------------------------------------------------------
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# sporel_git shared module
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# -----------------------------------------------------------------------------
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add_library(sporel_git MODULE src/sporel_git.c)
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target_include_directories(sporel_git PRIVATE
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src
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${LUA_INCLUDE_DIR}
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${SPOREL_ENGINE_INCLUDE_HINT} # for sporel/engine_api.h
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${libgit2_SOURCE_DIR}/include)
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# libgit2's main target is named "libgit2package" (the on-disk artifact
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# is libgit2.a / git2.dll; CMake target name lives independently per
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# libgit2's CMakeLists.txt at src/libgit2/CMakeLists.txt:59).
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# Linking against the CMake target propagates transitive system libs
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# (WinHTTP, ws2_32, crypt32, etc.) automatically.
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target_link_libraries(sporel_git PRIVATE
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libgit2package
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${SPOREL_ENGINE_IMPLIB})
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# When linking into sporel_engine.dll at runtime the Lua symbols come from
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# its re-exports, so we treat the engine import lib as the Lua import lib
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# too (no separate lua54 target). This avoids needing two Lua copies.
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set_target_properties(sporel_git PROPERTIES
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PREFIX ""
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OUTPUT_NAME "sporel_git")
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# Silence libgit2's compile warnings — they leak through FetchContent.
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if(MSVC)
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target_compile_options(sporel_git PRIVATE /W2)
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else()
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target_compile_options(sporel_git PRIVATE -Wall -Wno-unused-parameter)
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endif()
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# On Linux: --unresolved-symbols=ignore-in-shared-libs would let us drop
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# the engine import lib, but the import-lib path is uniform across both
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# platforms — keep it.
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