add_library(git2internal OBJECT)
set_target_properties(git2internal PROPERTIES C_STANDARD 90)


if(DEPRECATE_HARD)
        add_definitions(-DGIT_DEPRECATE_HARD)
endif()

if(DEBUG_POOL)
	set(GIT_DEBUG_POOL 1)
endif()
add_feature_info(debugpool GIT_DEBUG_POOL "debug pool allocator")

if(DEBUG_STRICT_ALLOC)
	set(GIT_DEBUG_STRICT_ALLOC 1)
endif()
add_feature_info(debugalloc GIT_DEBUG_STRICT_ALLOC "debug strict allocators")

if(DEBUG_STRICT_OPEN)
	set(GIT_DEBUG_STRICT_OPEN 1)
endif()
add_feature_info(debugopen GIT_DEBUG_STRICT_OPEN "path validation in open")


include(PkgBuildConfig)
include(SanitizeBool)

# This variable will contain the libraries we need to put into
# libgit2.pc's Requires.private. That is, what we're linking to or
# what someone who's statically linking us needs to link to.
set(LIBGIT2_PC_REQUIRES "")
# This will be set later if we use the system's http-parser library or
# use iconv (OSX) and will be written to the Libs.private field in the
# pc file.
set(LIBGIT2_PC_LIBS "")

set(LIBGIT2_INCLUDES
	"${CMAKE_CURRENT_BINARY_DIR}"
	"${libgit2_SOURCE_DIR}/src"
	"${libgit2_SOURCE_DIR}/include")
set(LIBGIT2_SYSTEM_INCLUDES "")
set(LIBGIT2_LIBS "")

enable_warnings(missing-declarations)

if(HAVE_FUTIMENS)
	set(GIT_USE_FUTIMENS 1)
endif ()
add_feature_info(futimens GIT_USE_FUTIMENS "futimens support")

check_prototype_definition(qsort_r
	"void qsort_r(void *base, size_t nmemb, size_t size, void *thunk, int (*compar)(void *, const void *, const void *))"
	"" "stdlib.h" GIT_QSORT_R_BSD)

check_prototype_definition(qsort_r
	"void qsort_r(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *, void *), void *arg)"
	"" "stdlib.h" GIT_QSORT_R_GNU)

check_function_exists(qsort_s GIT_QSORT_S)

# Find required dependencies

if(WIN32)
	list(APPEND LIBGIT2_LIBS ws2_32)
elseif(CMAKE_SYSTEM_NAME MATCHES "(Solaris|SunOS)")
	list(APPEND LIBGIT2_LIBS socket nsl)
	list(APPEND LIBGIT2_PC_LIBS "-lsocket" "-lnsl")
elseif(CMAKE_SYSTEM_NAME MATCHES "Haiku")
	list(APPEND LIBGIT2_LIBS network)
	list(APPEND LIBGIT2_PC_LIBS "-lnetwork")
endif()

check_library_exists(rt clock_gettime "time.h" NEED_LIBRT)
if(NEED_LIBRT)
	list(APPEND LIBGIT2_LIBS rt)
	list(APPEND LIBGIT2_PC_LIBS "-lrt")
endif()

if(USE_THREADS)
	list(APPEND LIBGIT2_LIBS ${CMAKE_THREAD_LIBS_INIT})
	list(APPEND LIBGIT2_PC_LIBS ${CMAKE_THREAD_LIBS_INIT})
endif()
add_feature_info(threadsafe USE_THREADS "threadsafe support")


if(WIN32 AND EMBED_SSH_PATH)
	file(GLOB SRC_SSH "${EMBED_SSH_PATH}/src/*.c")
	list(SORT SRC_SSH)
	target_sources(git2internal PRIVATE ${SRC_SSH})

	list(APPEND LIBGIT2_SYSTEM_INCLUDES "${EMBED_SSH_PATH}/include")
	file(WRITE "${EMBED_SSH_PATH}/src/libssh2_config.h" "#define HAVE_WINCNG\n#define LIBSSH2_WINCNG\n#include \"../win32/libssh2_config.h\"")
	set(GIT_SSH 1)
endif()

if(WIN32 AND USE_WINHTTP)
	set(GIT_WINHTTP 1)

	# Since MinGW does not come with headers or an import library for winhttp,
	# we have to include a private header and generate our own import library
	if(MINGW)
		add_subdirectory("${libgit2_SOURCE_DIR}/deps/winhttp" "${libgit2_BINARY_DIR}/deps/winhttp")
		list(APPEND LIBGIT2_LIBS winhttp)
		list(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/winhttp")
	else()
		list(APPEND LIBGIT2_LIBS "winhttp")
		list(APPEND LIBGIT2_PC_LIBS "-lwinhttp")
	endif()

	list(APPEND LIBGIT2_LIBS "rpcrt4" "crypt32" "ole32")
	list(APPEND LIBGIT2_PC_LIBS "-lrpcrt4" "-lcrypt32" "-lole32")
endif()

include(SelectHTTPSBackend)
include(SelectHashes)
include(SelectHTTPParser)

target_sources(git2internal PRIVATE ${SRC_SHA1})

# Specify regular expression implementation
find_package(PCRE)

if(REGEX_BACKEND STREQUAL "")
	check_symbol_exists(regcomp_l "regex.h;xlocale.h" HAVE_REGCOMP_L)

	if(HAVE_REGCOMP_L)
		set(REGEX_BACKEND "regcomp_l")
	elseif(PCRE_FOUND)
		set(REGEX_BACKEND "pcre")
	else()
		set(REGEX_BACKEND "builtin")
	endif()
endif()

if(REGEX_BACKEND STREQUAL "regcomp_l")
	add_feature_info(regex ON "using system regcomp_l")
	set(GIT_REGEX_REGCOMP_L 1)
elseif(REGEX_BACKEND STREQUAL "pcre2")
	find_package(PCRE2)

	if(NOT PCRE2_FOUND)
		MESSAGE(FATAL_ERROR "PCRE2 support was requested but not found")
	endif()

	add_feature_info(regex ON "using system PCRE2")
	set(GIT_REGEX_PCRE2 1)

	list(APPEND LIBGIT2_SYSTEM_INCLUDES ${PCRE2_INCLUDE_DIRS})
	list(APPEND LIBGIT2_LIBS ${PCRE2_LIBRARIES})
	list(APPEND LIBGIT2_PC_REQUIRES "libpcre2-8")
elseif(REGEX_BACKEND STREQUAL "pcre")
	add_feature_info(regex ON "using system PCRE")
	set(GIT_REGEX_PCRE 1)

	list(APPEND LIBGIT2_SYSTEM_INCLUDES ${PCRE_INCLUDE_DIRS})
	list(APPEND LIBGIT2_LIBS ${PCRE_LIBRARIES})
	list(APPEND LIBGIT2_PC_REQUIRES "libpcre")
elseif(REGEX_BACKEND STREQUAL "regcomp")
	add_feature_info(regex ON "using system regcomp")
	set(GIT_REGEX_REGCOMP 1)
elseif(REGEX_BACKEND STREQUAL "builtin")
	add_feature_info(regex ON "using bundled PCRE")
	set(GIT_REGEX_BUILTIN 1)

	add_subdirectory("${libgit2_SOURCE_DIR}/deps/pcre" "${libgit2_BINARY_DIR}/deps/pcre")
	list(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/pcre")
	list(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:pcre>)
else()
	message(FATAL_ERROR "The REGEX_BACKEND option provided is not supported")
endif()

# Optional external dependency: zlib
SanitizeBool(USE_BUNDLED_ZLIB)
if(USE_BUNDLED_ZLIB STREQUAL ON)
	set(USE_BUNDLED_ZLIB "Bundled")
endif()

if(USE_BUNDLED_ZLIB STREQUAL "OFF")
	find_package(ZLIB)
	if(ZLIB_FOUND)
		list(APPEND LIBGIT2_SYSTEM_INCLUDES ${ZLIB_INCLUDE_DIRS})
		list(APPEND LIBGIT2_LIBS ${ZLIB_LIBRARIES})
		if(APPLE OR CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
			list(APPEND LIBGIT2_PC_LIBS "-lz")
		else()
			list(APPEND LIBGIT2_PC_REQUIRES "zlib")
		endif()
		add_feature_info(zlib ON "using system zlib")
	else()
		message(STATUS "zlib was not found; using bundled 3rd-party sources." )
	endif()
endif()
if(USE_BUNDLED_ZLIB STREQUAL "Chromium")
	add_subdirectory("${libgit2_SOURCE_DIR}/deps/chromium-zlib" "${libgit2_BINARY_DIR}/deps/chromium-zlib")
	list(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/chromium-zlib")
	list(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:chromium_zlib>)
	add_feature_info(zlib ON "using (Chromium) bundled zlib")
elseif(USE_BUNDLED_ZLIB OR NOT ZLIB_FOUND)
	add_subdirectory("${libgit2_SOURCE_DIR}/deps/zlib" "${libgit2_BINARY_DIR}/deps/zlib")
	list(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/zlib")
	list(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:zlib>)
	add_feature_info(zlib ON "using bundled zlib")
endif()

# Optional external dependency: libssh2
if(USE_SSH)
	find_pkglibraries(LIBSSH2 libssh2)
	if(NOT LIBSSH2_FOUND)
		find_package(LibSSH2)
		set(LIBSSH2_INCLUDE_DIRS ${LIBSSH2_INCLUDE_DIR})
		get_filename_component(LIBSSH2_LIBRARY_DIRS "${LIBSSH2_LIBRARY}" DIRECTORY)
		set(LIBSSH2_LIBRARIES ${LIBSSH2_LIBRARY})
		set(LIBSSH2_LDFLAGS "-lssh2")
	endif()
endif()
if(LIBSSH2_FOUND)
	set(GIT_SSH 1)
	list(APPEND LIBGIT2_SYSTEM_INCLUDES ${LIBSSH2_INCLUDE_DIRS})
	list(APPEND LIBGIT2_LIBS ${LIBSSH2_LIBRARIES})
	list(APPEND LIBGIT2_PC_LIBS ${LIBSSH2_LDFLAGS})

	check_library_exists("${LIBSSH2_LIBRARIES}" libssh2_userauth_publickey_frommemory "${LIBSSH2_LIBRARY_DIRS}" HAVE_LIBSSH2_MEMORY_CREDENTIALS)
	if(HAVE_LIBSSH2_MEMORY_CREDENTIALS)
		set(GIT_SSH_MEMORY_CREDENTIALS 1)
	endif()
else()
	message(STATUS "LIBSSH2 not found. Set CMAKE_PREFIX_PATH if it is installed outside of the default search path.")
endif()
add_feature_info(SSH GIT_SSH "SSH transport support")

# Optional external dependency: ntlmclient
if(USE_NTLMCLIENT)
	set(GIT_NTLM 1)
	add_subdirectory("${libgit2_SOURCE_DIR}/deps/ntlmclient" "${libgit2_BINARY_DIR}/deps/ntlmclient")
	list(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/ntlmclient")
	list(APPEND LIBGIT2_OBJECTS "$<TARGET_OBJECTS:ntlmclient>")
endif()
add_feature_info(ntlmclient GIT_NTLM "NTLM authentication support for Unix")

# Optional external dependency: GSSAPI

include(SelectGSSAPI)

# Optional external dependency: iconv
if(USE_ICONV)
	find_package(Iconv)
endif()
if(ICONV_FOUND)
	set(GIT_USE_ICONV 1)
	list(APPEND LIBGIT2_SYSTEM_INCLUDES ${ICONV_INCLUDE_DIR})
	list(APPEND LIBGIT2_LIBS ${ICONV_LIBRARIES})
	list(APPEND LIBGIT2_PC_LIBS ${ICONV_LIBRARIES})
endif()
add_feature_info(iconv GIT_USE_ICONV "iconv encoding conversion support")


if(USE_THREADS)
	if(NOT WIN32)
		find_package(Threads REQUIRED)
	endif()

	set(GIT_THREADS 1)
endif()

if(USE_NSEC)
	set(GIT_USE_NSEC 1)
endif()

if(HAVE_STRUCT_STAT_ST_MTIM)
	set(GIT_USE_STAT_MTIM 1)
elseif(HAVE_STRUCT_STAT_ST_MTIMESPEC)
	set(GIT_USE_STAT_MTIMESPEC 1)
elseif(HAVE_STRUCT_STAT_ST_MTIME_NSEC)
	set(GIT_USE_STAT_MTIME_NSEC 1)
endif()

target_compile_definitions(git2internal PRIVATE _FILE_OFFSET_BITS=64)

# Collect sourcefiles
file(GLOB SRC_H
	"${libgit2_SOURCE_DIR}/include/git2.h"
	"${libgit2_SOURCE_DIR}/include/git2/*.h"
	"${libgit2_SOURCE_DIR}/include/git2/sys/*.h")
list(SORT SRC_H)
target_sources(git2internal PRIVATE ${SRC_H})

# On Windows use specific platform sources
if(WIN32 AND NOT CYGWIN)
	set(WIN_RC "win32/git2.rc")

	file(GLOB SRC_OS win32/*.c win32/*.h)
	list(SORT SRC_OS)
	target_sources(git2internal PRIVATE ${SRC_OS})
elseif(AMIGA)
	target_compile_definitions(git2internal PRIVATE NO_ADDRINFO NO_READDIR_R NO_MMAP)
else()
	file(GLOB SRC_OS unix/*.c unix/*.h)
	list(SORT SRC_OS)
	target_sources(git2internal PRIVATE ${SRC_OS})
endif()

if(USE_LEAK_CHECKER STREQUAL "valgrind")
	target_compile_definitions(git2internal PRIVATE VALGRIND)
endif()

file(GLOB SRC_GIT2 *.c *.h
	allocators/*.c allocators/*.h
	streams/*.c streams/*.h
	transports/*.c transports/*.h
	xdiff/*.c xdiff/*.h)
list(SORT SRC_GIT2)
target_sources(git2internal PRIVATE ${SRC_GIT2})

if(APPLE)
	# The old Secure Transport API has been deprecated in macOS 10.15.
	set_source_files_properties(streams/stransport.c PROPERTIES COMPILE_FLAGS -Wno-deprecated)
endif()

# the xdiff dependency is not (yet) warning-free, disable warnings as
# errors for the xdiff sources until we've sorted them out
if(MSVC)
	set_source_files_properties(xdiff/xdiffi.c PROPERTIES COMPILE_FLAGS -WX-)
	set_source_files_properties(xdiff/xutils.c PROPERTIES COMPILE_FLAGS -WX-)
endif()

# Determine architecture of the machine
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
	set(GIT_ARCH_64 1)
elseif(CMAKE_SIZEOF_VOID_P EQUAL 4)
	set(GIT_ARCH_32 1)
elseif(CMAKE_SIZEOF_VOID_P)
	message(FATAL_ERROR "Unsupported architecture (pointer size is ${CMAKE_SIZEOF_VOID_P} bytes)")
else()
	message(FATAL_ERROR "Unsupported architecture (CMAKE_SIZEOF_VOID_P is unset)")
endif()

configure_file(features.h.in git2/sys/features.h)

ide_split_sources(git2internal)
list(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:git2internal>)

target_include_directories(git2internal PRIVATE ${LIBGIT2_INCLUDES} PUBLIC ${libgit2_SOURCE_DIR}/include)
target_include_directories(git2internal SYSTEM PRIVATE ${LIBGIT2_SYSTEM_INCLUDES})

set(LIBGIT2_OBJECTS ${LIBGIT2_OBJECTS} PARENT_SCOPE)
set(LIBGIT2_INCLUDES ${LIBGIT2_INCLUDES} PARENT_SCOPE)
set(LIBGIT2_SYSTEM_INCLUDES ${LIBGIT2_SYSTEM_INCLUDES} PARENT_SCOPE)
set(LIBGIT2_LIBS ${LIBGIT2_LIBS} PARENT_SCOPE)

if(XCODE_VERSION)
	# This is required for Xcode to actually link the libgit2 library
	# when using only object libraries.
	file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/dummy.c "")
	list(APPEND LIBGIT2_OBJECTS ${CMAKE_CURRENT_BINARY_DIR}/dummy.c)
endif()

# Compile and link libgit2
add_library(git2 ${WIN_RC} ${LIBGIT2_OBJECTS})
target_link_libraries(git2 ${LIBGIT2_LIBS})

set_target_properties(git2 PROPERTIES C_STANDARD 90)
set_target_properties(git2 PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${libgit2_BINARY_DIR})
set_target_properties(git2 PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${libgit2_BINARY_DIR})
set_target_properties(git2 PROPERTIES ARCHIVE_OUTPUT_DIRECTORY ${libgit2_BINARY_DIR})

# Workaround for Cmake bug #0011240 (see http://public.kitware.com/Bug/view.php?id=11240)
# Win64+MSVC+static libs = linker error
if(MSVC AND GIT_ARCH_64 AND NOT BUILD_SHARED_LIBS)
	set_target_properties(git2 PROPERTIES STATIC_LIBRARY_FLAGS "/MACHINE:x64")
endif()

ide_split_sources(git2)

if(SONAME)
	set_target_properties(git2 PROPERTIES VERSION ${libgit2_VERSION})
	set_target_properties(git2 PROPERTIES SOVERSION "${libgit2_VERSION_MAJOR}.${libgit2_VERSION_MINOR}")
	if(LIBGIT2_FILENAME)
		target_compile_definitions(git2 PRIVATE LIBGIT2_FILENAME=\"${LIBGIT2_FILENAME}\")
		set_target_properties(git2 PROPERTIES OUTPUT_NAME ${LIBGIT2_FILENAME})
	elseif(DEFINED LIBGIT2_PREFIX)
		set_target_properties(git2 PROPERTIES PREFIX "${LIBGIT2_PREFIX}")
	endif()
endif()

pkg_build_config(NAME libgit2
	VERSION ${libgit2_VERSION}
	DESCRIPTION "The git library, take 2"
	LIBS_SELF git2
	PRIVATE_LIBS ${LIBGIT2_PC_LIBS}
	REQUIRES ${LIBGIT2_PC_REQUIRES}
)

if(MSVC_IDE)
	# Precompiled headers
	set_target_properties(git2 PROPERTIES COMPILE_FLAGS "/Yuprecompiled.h /FIprecompiled.h")
	set_source_files_properties(win32/precompiled.c COMPILE_FLAGS "/Ycprecompiled.h")
endif()

# Install
install(TARGETS git2
	RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
	LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
	ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
)
install(DIRECTORY ${libgit2_SOURCE_DIR}/include/git2 DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
install(FILES ${libgit2_SOURCE_DIR}/include/git2.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
