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name: contrib/buildsystems/CMakeLists.txt 	 # note: path name is non-authoritative(*)

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#
#	Copyright (c) 2020 Sibi Siddharthan
#

#[[

== Overview ==

The top-level Makefile is Git's primary build environment, and a lot
of things are missing (and probably always will be) from this CMake
alternative.

The primary use-case for maintaining this CMake build recipe is to
have nicer IDE integration on Windows.

== Creating a build recipe ==

The "cmake" command creates a build file from this recipe:

    cmake -S contrib/buildsystems -B contrib/buildsystems/out -DCMAKE_BUILD_TYPE=Release

Running this will create files in the contrib/buildsystems/out
directory (our top-level .gitignore file knows to ignore contents of
this directory).

See "cmake options" below for a discussion of
"-DCMAKE_BUILD_TYPE=Release" and other options to "cmake".

== Building with Visual Visual Studio ==

To use this in Visual Studio:

Open the worktree as a folder. Visual Studio 2019 and later will detect
the CMake configuration automatically and set everything up for you,
ready to build. See "== Running the tests ==" below for running the tests.

Note: Visual Studio also has the option of opening `CMakeLists.txt`
directly; Using this option, Visual Studio will not find the source code,
though, therefore the `File>Open>Folder...` option is preferred.

By default CMake will install vcpkg locally to your source tree on configuration,
to avoid this, add `-DNO_VCPKG=TRUE` to the command line when configuring.

== Building on Windows without Visual Studio ==

Open contrib/buildsystems/git.sln and build Git. Or use the "msbuild"
command-line tool (see our own ".github/workflows/main.yml" for a real
example):

	msbuild git.sln

== Building on *nix ==

On all other platforms running "cmake" will generate a Makefile; to
build with it run:

	make -C contrib/buildsystems/out

It's also possible to use other generators, e.g. Ninja has arguably
slightly better output. Add "-G Ninja" to the cmake command above,
then:

	ninja -C contrib/buildsystems/out

== cmake options ==

=== -DCMAKE_BUILD_TYPE=<type> ===

Possible build configurations(-DCMAKE_BUILD_TYPE) with corresponding
compiler flags
Debug : -g
Release: -O3
RelWithDebInfo : -O2 -g
MinSizeRel : -Os
empty(default) :

NOTE: -DCMAKE_BUILD_TYPE is optional. For multi-config generators like Visual Studio
this option is ignored

== Running the tests ==

Once we've built in "contrib/buildsystems/out" the tests can be run at
the top-level (note: not the generated "contrib/buildsystems/out/t/"
drectory). If no top-level build is found (as created with the
Makefile) the t/test-lib.sh will discover the git in
"contrib/buildsystems/out" on e.g.:

	(cd t && ./t0001-init.sh)
	setup: had no ../git, but found & used cmake built git in ../contrib/buildsystems/out/git
	[...]

The tests can also be run with ctest, e.g. after building with "cmake"
and "make" or "msbuild" run, from the top-level e.g.:

	# "--test-dir" is new in cmake v3.20, so "(cd
	# contrib/buildsystems/out && ctest ...)" on older versions.
	ctest --test-dir contrib/buildsystems/out --jobs="$(nproc)"--output-on-failure

Options can be passed by setting GIT_TEST_OPTIONS before invoking
cmake. E.g. on a Linux system with systemd the tests can be sped up by
using a ramdisk for the scratch files:

	GIT_TEST_OPTS="--root=/dev/shm/$(id -u)/ctest" cmake -S contrib/buildsystems -B contrib/buildsystems/out
	[...]
	-- Using user-selected test options: --root=/dev/shm/<uid>/ctest

Then running the tests with "ctest" (here with --jobs="$(nproc)"):

	ctest --jobs=$(nproc) --test-dir contrib/buildsystems/out
]]
cmake_minimum_required(VERSION 3.14)

#set the source directory to root of git
set(CMAKE_SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/../..)

option(USE_VCPKG "Whether or not to use vcpkg for obtaining dependencies.  Only applicable to Windows platforms" ON)
if(NOT WIN32)
	set(USE_VCPKG OFF CACHE BOOL "" FORCE)
endif()

if(NOT DEFINED CMAKE_EXPORT_COMPILE_COMMANDS)
	set(CMAKE_EXPORT_COMPILE_COMMANDS TRUE)
endif()

if(USE_VCPKG)
	set(VCPKG_DIR "${CMAKE_SOURCE_DIR}/compat/vcbuild/vcpkg")
	if(NOT EXISTS ${VCPKG_DIR})
		message("Initializing vcpkg and building the Git's dependencies (this will take a while...)")
		execute_process(COMMAND ${CMAKE_SOURCE_DIR}/compat/vcbuild/vcpkg_install.bat)
	endif()
	list(APPEND CMAKE_PREFIX_PATH "${VCPKG_DIR}/installed/x64-windows")

	# In the vcpkg edition, we need this to be able to link to libcurl
	set(CURL_NO_CURL_CMAKE ON)

	# Copy the necessary vcpkg DLLs (like iconv) to the install dir
	set(X_VCPKG_APPLOCAL_DEPS_INSTALL ON)
	set(CMAKE_TOOLCHAIN_FILE ${VCPKG_DIR}/scripts/buildsystems/vcpkg.cmake CACHE STRING "Vcpkg toolchain file")
endif()

if(WIN32)
	find_program(SH_EXE sh PATHS "C:/Program Files/Git/bin" "$ENV{LOCALAPPDATA}/Programs/Git/bin")
	if(NOT SH_EXE)
		message(FATAL_ERROR "sh: shell interpreter was not found in your path, please install one."
				"You can get it as part of 'Git for Windows' install at https://gitforwindows.org/")
	endif()
else()
	find_program(SH_EXE sh)
	if(NOT SH_EXE)
		message(FATAL_ERROR "cannot find 'sh' in '$PATH'")
	endif()
endif()

#Create GIT-VERSION-FILE using GIT-VERSION-GEN
if(NOT EXISTS ${CMAKE_SOURCE_DIR}/GIT-VERSION-FILE)
	message("Generating GIT-VERSION-FILE")
	execute_process(COMMAND ${SH_EXE} ${CMAKE_SOURCE_DIR}/GIT-VERSION-GEN
		WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
endif()

#Parse GIT-VERSION-FILE to get the version
file(STRINGS ${CMAKE_SOURCE_DIR}/GIT-VERSION-FILE git_version REGEX "GIT_VERSION = (.*)")
string(REPLACE "GIT_VERSION = " "" git_version ${git_version})
string(FIND ${git_version} "GIT" location)
if(location EQUAL -1)
	string(REGEX MATCH "[0-9]*\\.[0-9]*\\.[0-9]*" git_version ${git_version})
else()
	string(REGEX MATCH "[0-9]*\\.[0-9]*" git_version ${git_version})
	string(APPEND git_version ".0") #for building from a snapshot
endif()

project(git
	VERSION ${git_version}
	LANGUAGES C)


#TODO gitk git-gui gitweb
#TODO Enable NLS on windows natively

#macros for parsing the Makefile for sources and scripts
macro(parse_makefile_for_sources list_var regex)
	file(STRINGS ${CMAKE_SOURCE_DIR}/Makefile ${list_var} REGEX "^${regex} \\+=(.*)")
	string(REPLACE "${regex} +=" "" ${list_var} ${${list_var}})
	string(REPLACE "$(COMPAT_OBJS)" "" ${list_var} ${${list_var}}) #remove "$(COMPAT_OBJS)" This is only for libgit.
	string(STRIP ${${list_var}} ${list_var}) #remove trailing/leading whitespaces
	string(REPLACE ".o" ".c;" ${list_var} ${${list_var}}) #change .o to .c, ; is for converting the string into a list
	list(TRANSFORM ${list_var} STRIP) #remove trailing/leading whitespaces for each element in list
	list(REMOVE_ITEM ${list_var} "") #remove empty list elements
endmacro()

macro(parse_makefile_for_scripts list_var regex lang)
	file(STRINGS ${CMAKE_SOURCE_DIR}/Makefile ${list_var} REGEX "^${regex} \\+=(.*)")
	string(REPLACE "${regex} +=" "" ${list_var} ${${list_var}})
	string(STRIP ${${list_var}} ${list_var}) #remove trailing/leading whitespaces
	string(REPLACE " " ";" ${list_var} ${${list_var}}) #convert string to a list
	if(NOT ${lang}) #exclude for SCRIPT_LIB
		list(TRANSFORM ${list_var} REPLACE "${lang}" "") #do the replacement
	endif()
endmacro()

macro(parse_makefile_for_executables list_var regex)
	file(STRINGS ${CMAKE_SOURCE_DIR}/Makefile ${list_var} REGEX "^${regex} \\+= git-(.*)")
	string(REPLACE "${regex} +=" "" ${list_var} ${${list_var}})
	string(STRIP ${${list_var}} ${list_var}) #remove trailing/leading whitespaces
	string(REPLACE "git-" "" ${list_var} ${${list_var}}) #strip `git-` prefix
	string(REPLACE "\$X" ";" ${list_var} ${${list_var}}) #strip $X, ; is for converting the string into a list
	list(TRANSFORM ${list_var} STRIP) #remove trailing/leading whitespaces for each element in list
	list(REMOVE_ITEM ${list_var} "") #remove empty list elements
endmacro()

include(CheckTypeSize)
include(CheckCSourceRuns)
include(CheckCSourceCompiles)
include(CheckIncludeFile)
include(CheckFunctionExists)
include(CheckSymbolExists)
include(CheckStructHasMember)
include(CTest)

find_package(ZLIB REQUIRED)
find_package(CURL)
find_package(EXPAT)
find_package(Iconv)

#Don't use libintl on Windows Visual Studio and Clang builds
if(NOT (WIN32 AND (CMAKE_C_COMPILER_ID STREQUAL "MSVC" OR CMAKE_C_COMPILER_ID STREQUAL "Clang")))
	find_package(Intl)
endif()

find_package(PkgConfig)
if(PkgConfig_FOUND)
	pkg_check_modules(PCRE2 libpcre2-8)
	if(PCRE2_FOUND)
		add_compile_definitions(USE_LIBPCRE2)
	endif()
endif()

if(NOT Intl_FOUND)
	add_compile_definitions(NO_GETTEXT)
	if(NOT Iconv_FOUND)
		add_compile_definitions(NO_ICONV)
	endif()
endif()

include_directories(SYSTEM ${ZLIB_INCLUDE_DIRS})
if(CURL_FOUND)
	include_directories(SYSTEM ${CURL_INCLUDE_DIRS})
endif()
if(EXPAT_FOUND)
	include_directories(SYSTEM ${EXPAT_INCLUDE_DIRS})
endif()
if(Iconv_FOUND)
	include_directories(SYSTEM ${Iconv_INCLUDE_DIRS})
endif()
if(Intl_FOUND)
	include_directories(SYSTEM ${Intl_INCLUDE_DIRS})
endif()
if(PCRE2_FOUND)
	include_directories(SYSTEM ${PCRE2_INCLUDE_DIRS})
endif()


if(WIN32 AND NOT MSVC)#not required for visual studio builds
	find_program(WINDRES_EXE windres)
	if(NOT WINDRES_EXE)
		message(FATAL_ERROR "Install windres on Windows for resource files")
	endif()
endif()

if(NO_GETTEXT)
	message(STATUS "msgfmt not used under NO_GETTEXT")
else()
	find_program(MSGFMT_EXE msgfmt)
	if(NOT MSGFMT_EXE)
		if(USE_VCPKG)
			set(MSGFMT_EXE ${CMAKE_SOURCE_DIR}/compat/vcbuild/vcpkg/downloads/tools/msys2/msys64/usr/bin/msgfmt.exe)
		endif()
		if(NOT EXISTS ${MSGFMT_EXE})
			message(WARNING "Text Translations won't be built")
			unset(MSGFMT_EXE)
		endif()
	endif()
endif()

#Force all visual studio outputs to CMAKE_BINARY_DIR
if(CMAKE_C_COMPILER_ID STREQUAL "MSVC")
	set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG ${CMAKE_BINARY_DIR})
	set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE ${CMAKE_BINARY_DIR})
	add_compile_options(/MP /std:c11)
endif()

#default behaviour
include_directories(${CMAKE_SOURCE_DIR})
add_compile_definitions(GIT_HOST_CPU="${CMAKE_SYSTEM_PROCESSOR}")
add_compile_definitions(SHA256_BLK INTERNAL_QSORT RUNTIME_PREFIX)
add_compile_definitions(NO_OPENSSL SHA1_DC SHA1DC_NO_STANDARD_INCLUDES
			SHA1DC_INIT_SAFE_HASH_DEFAULT=0
			SHA1DC_CUSTOM_INCLUDE_SHA1_C="cache.h"
			SHA1DC_CUSTOM_INCLUDE_UBC_CHECK_C="git-compat-util.h" )
list(APPEND compat_SOURCES sha1dc_git.c sha1dc/sha1.c sha1dc/ubc_check.c block-sha1/sha1.c sha256/block/sha256.c compat/qsort_s.c)


add_compile_definitions(PAGER_ENV="LESS=FRX LV=-c"
			GIT_EXEC_PATH="libexec/git-core"
			GIT_LOCALE_PATH="share/locale"
			GIT_MAN_PATH="share/man"
			GIT_INFO_PATH="share/info"
			GIT_HTML_PATH="share/doc/git-doc"
			DEFAULT_HELP_FORMAT="html"
			DEFAULT_GIT_TEMPLATE_DIR="share/git-core/templates"
			GIT_VERSION="${PROJECT_VERSION}.GIT"
			GIT_USER_AGENT="git/${PROJECT_VERSION}.GIT"
			BINDIR="bin"
			GIT_BUILT_FROM_COMMIT="")

if(WIN32)
	set(FALLBACK_RUNTIME_PREFIX /mingw64)
	# Move system config into top-level /etc/
	add_compile_definitions(FALLBACK_RUNTIME_PREFIX="${FALLBACK_RUNTIME_PREFIX}"
		ETC_GITATTRIBUTES="../etc/gitattributes"
		ETC_GITCONFIG="../etc/gitconfig")
else()
	set(FALLBACK_RUNTIME_PREFIX /home/$ENV{USER})
	add_compile_definitions(FALLBACK_RUNTIME_PREFIX="${FALLBACK_RUNTIME_PREFIX}"
		ETC_GITATTRIBUTES="etc/gitattributes"
		ETC_GITCONFIG="etc/gitconfig")
endif()


#Platform Specific
if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
	if(CMAKE_C_COMPILER_ID STREQUAL "MSVC" OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
		include_directories(${CMAKE_SOURCE_DIR}/compat/vcbuild/include)
		add_compile_definitions(_CRT_SECURE_NO_WARNINGS _CRT_NONSTDC_NO_DEPRECATE)
	endif()
	include_directories(${CMAKE_SOURCE_DIR}/compat/win32)
	add_compile_definitions(HAVE_ALLOCA_H NO_POSIX_GOODIES NATIVE_CRLF NO_UNIX_SOCKETS WIN32
				_CONSOLE DETECT_MSYS_TTY STRIP_EXTENSION=".exe"  NO_SYMLINK_HEAD UNRELIABLE_FSTAT
				NOGDI OBJECT_CREATION_MODE=1 __USE_MINGW_ANSI_STDIO=0
				USE_NED_ALLOCATOR OVERRIDE_STRDUP MMAP_PREVENTS_DELETE USE_WIN32_MMAP
				HAVE_WPGMPTR ENSURE_MSYSTEM_IS_SET HAVE_RTLGENRANDOM)
	list(APPEND compat_SOURCES
		compat/mingw.c
		compat/winansi.c
		compat/win32/flush.c
		compat/win32/path-utils.c
		compat/win32/pthread.c
		compat/win32mmap.c
		compat/win32/syslog.c
		compat/win32/trace2_win32_process_info.c
		compat/win32/dirent.c
		compat/nedmalloc/nedmalloc.c
		compat/strdup.c)
	set(NO_UNIX_SOCKETS 1)

elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
	add_compile_definitions(PROCFS_EXECUTABLE_PATH="/proc/self/exe" HAVE_DEV_TTY )
	list(APPEND compat_SOURCES unix-socket.c unix-stream-server.c compat/linux/procinfo.c)
endif()

if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
	list(APPEND compat_SOURCES compat/simple-ipc/ipc-shared.c compat/simple-ipc/ipc-win32.c)
	add_compile_definitions(SUPPORTS_SIMPLE_IPC)
	set(SUPPORTS_SIMPLE_IPC 1)
else()
	# Simple IPC requires both Unix sockets and pthreads on Unix-based systems.
	if(NOT NO_UNIX_SOCKETS AND NOT NO_PTHREADS)
		list(APPEND compat_SOURCES compat/simple-ipc/ipc-shared.c compat/simple-ipc/ipc-unix-socket.c)
		add_compile_definitions(SUPPORTS_SIMPLE_IPC)
		set(SUPPORTS_SIMPLE_IPC 1)
	endif()
endif()

if(SUPPORTS_SIMPLE_IPC)
	if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
		add_compile_definitions(HAVE_FSMONITOR_DAEMON_BACKEND)
		list(APPEND compat_SOURCES compat/fsmonitor/fsm-listen-win32.c)
		list(APPEND compat_SOURCES compat/fsmonitor/fsm-health-win32.c)
		list(APPEND compat_SOURCES compat/fsmonitor/fsm-ipc-win32.c)
		list(APPEND compat_SOURCES compat/fsmonitor/fsm-path-utils-win32.c)

		add_compile_definitions(HAVE_FSMONITOR_OS_SETTINGS)
		list(APPEND compat_SOURCES compat/fsmonitor/fsm-settings-win32.c)
	elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
		add_compile_definitions(HAVE_FSMONITOR_DAEMON_BACKEND)
		list(APPEND compat_SOURCES compat/fsmonitor/fsm-listen-darwin.c)
		list(APPEND compat_SOURCES compat/fsmonitor/fsm-health-darwin.c)
		list(APPEND compat_SOURCES compat/fsmonitor/fsm-ipc-darwin.c)
		list(APPEND compat_SOURCES compat/fsmonitor/fsm-path-utils-darwin.c)

		add_compile_definitions(HAVE_FSMONITOR_OS_SETTINGS)
		list(APPEND compat_SOURCES compat/fsmonitor/fsm-settings-darwin.c)
	endif()
endif()

set(EXE_EXTENSION ${CMAKE_EXECUTABLE_SUFFIX})

#header checks
check_include_file(libgen.h HAVE_LIBGEN_H)
if(NOT HAVE_LIBGEN_H)
	add_compile_definitions(NO_LIBGEN_H)
	list(APPEND compat_SOURCES compat/basename.c)
endif()

check_include_file(sys/sysinfo.h HAVE_SYSINFO)
if(HAVE_SYSINFO)
	add_compile_definitions(HAVE_SYSINFO)
endif()

check_c_source_compiles("
#include <alloca.h>

int main(void)
{
	char *p = (char *) alloca(2 * sizeof(int));

	if (p)
		return 0;
	return 0;
}"
HAVE_ALLOCA_H)
if(HAVE_ALLOCA_H)
	add_compile_definitions(HAVE_ALLOCA_H)
endif()

check_include_file(strings.h HAVE_STRINGS_H)
if(HAVE_STRINGS_H)
	add_compile_definitions(HAVE_STRINGS_H)
endif()

check_include_file(sys/select.h HAVE_SYS_SELECT_H)
if(NOT HAVE_SYS_SELECT_H)
	add_compile_definitions(NO_SYS_SELECT_H)
endif()

check_include_file(sys/poll.h HAVE_SYS_POLL_H)
if(NOT HAVE_SYS_POLL_H)
	add_compile_definitions(NO_SYS_POLL_H)
endif()

check_include_file(poll.h HAVE_POLL_H)
if(NOT HAVE_POLL_H)
	add_compile_definitions(NO_POLL_H)
endif()

check_include_file(inttypes.h HAVE_INTTYPES_H)
if(NOT HAVE_INTTYPES_H)
	add_compile_definitions(NO_INTTYPES_H)
endif()

check_include_file(paths.h HAVE_PATHS_H)
if(HAVE_PATHS_H)
	add_compile_definitions(HAVE_PATHS_H)
endif()

#function checks
set(function_checks
	strcasestr memmem strlcpy strtoimax strtoumax strtoull
	setenv mkdtemp poll pread memmem)

#unsetenv,hstrerror are incompatible with windows build
if(NOT WIN32)
	list(APPEND function_checks unsetenv hstrerror)
endif()

foreach(f ${function_checks})
	string(TOUPPER ${f} uf)
	check_function_exists(${f} HAVE_${uf})
	if(NOT HAVE_${uf})
		add_compile_definitions(NO_${uf})
	endif()
endforeach()

if(NOT HAVE_POLL_H OR NOT HAVE_SYS_POLL_H OR NOT HAVE_POLL)
	include_directories(${CMAKE_SOURCE_DIR}/compat/poll)
	add_compile_definitions(NO_POLL)
	list(APPEND compat_SOURCES compat/poll/poll.c)
endif()

if(NOT HAVE_STRCASESTR)
	list(APPEND compat_SOURCES compat/strcasestr.c)
endif()

if(NOT HAVE_STRLCPY)
	list(APPEND compat_SOURCES compat/strlcpy.c)
endif()

if(NOT HAVE_STRTOUMAX)
	list(APPEND compat_SOURCES compat/strtoumax.c compat/strtoimax.c)
endif()

if(NOT HAVE_SETENV)
	list(APPEND compat_SOURCES compat/setenv.c)
endif()

if(NOT HAVE_MKDTEMP)
	list(APPEND compat_SOURCES compat/mkdtemp.c)
endif()

if(NOT HAVE_PREAD)
	list(APPEND compat_SOURCES compat/pread.c)
endif()

if(NOT HAVE_MEMMEM)
	list(APPEND compat_SOURCES compat/memmem.c)
endif()

if(NOT WIN32)
	if(NOT HAVE_UNSETENV)
		list(APPEND compat_SOURCES compat/unsetenv.c)
	endif()

	if(NOT HAVE_HSTRERROR)
		list(APPEND compat_SOURCES compat/hstrerror.c)
	endif()
endif()

check_function_exists(getdelim HAVE_GETDELIM)
if(HAVE_GETDELIM)
	add_compile_definitions(HAVE_GETDELIM)
endif()

check_function_exists(clock_gettime HAVE_CLOCK_GETTIME)
check_symbol_exists(CLOCK_MONOTONIC "time.h" HAVE_CLOCK_MONOTONIC)
if(HAVE_CLOCK_GETTIME)
	add_compile_definitions(HAVE_CLOCK_GETTIME)
endif()
if(HAVE_CLOCK_MONOTONIC)
	add_compile_definitions(HAVE_CLOCK_MONOTONIC)
endif()

#check for st_blocks in struct stat
check_struct_has_member("struct stat" st_blocks "sys/stat.h" STRUCT_STAT_HAS_ST_BLOCKS)
if(NOT STRUCT_STAT_HAS_ST_BLOCKS)
	add_compile_definitions(NO_ST_BLOCKS_IN_STRUCT_STAT)
endif()

#compile checks
check_c_source_runs("
#include<stdio.h>
#include<stdarg.h>
#include<string.h>
#include<stdlib.h>

int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
{
	int ret;
	va_list ap;

	va_start(ap, format);
	ret = vsnprintf(str, maxsize, format, ap);
	va_end(ap);
	return ret;
}

int main(void)
{
	char buf[6];

	if (test_vsnprintf(buf, 3, \"%s\", \"12345\") != 5
		|| strcmp(buf, \"12\"))
			return 1;
	if (snprintf(buf, 3, \"%s\", \"12345\") != 5
		|| strcmp(buf, \"12\"))
			return 1;
	return 0;
}"
SNPRINTF_OK)
if(NOT SNPRINTF_OK)
	add_compile_definitions(SNPRINTF_RETURNS_BOGUS)
	list(APPEND compat_SOURCES compat/snprintf.c)
endif()

check_c_source_runs("
#include<stdio.h>

int main(void)
{
	FILE *f = fopen(\".\", \"r\");

	return f != NULL;
}"
FREAD_READS_DIRECTORIES_NO)
if(NOT FREAD_READS_DIRECTORIES_NO)
	add_compile_definitions(FREAD_READS_DIRECTORIES)
	list(APPEND compat_SOURCES compat/fopen.c)
endif()

check_c_source_compiles("
#include <regex.h>
#ifndef REG_STARTEND
#error oops we dont have it
#endif

int main(void)
{
	return 0;
}"
HAVE_REGEX)
if(NOT HAVE_REGEX)
	include_directories(${CMAKE_SOURCE_DIR}/compat/regex)
	list(APPEND compat_SOURCES compat/regex/regex.c )
	add_compile_definitions(NO_REGEX NO_MBSUPPORT GAWK)
endif()


check_c_source_compiles("
#include <stddef.h>
#include <sys/types.h>
#include <sys/sysctl.h>

int main(void)
{
	int val, mib[2];
	size_t len;

	mib[0] = CTL_HW;
	mib[1] = 1;
	len = sizeof(val);
	return sysctl(mib, 2, &val, &len, NULL, 0) ? 1 : 0;
}"
HAVE_BSD_SYSCTL)
if(HAVE_BSD_SYSCTL)
	add_compile_definitions(HAVE_BSD_SYSCTL)
endif()

set(CMAKE_REQUIRED_LIBRARIES ${Iconv_LIBRARIES})
set(CMAKE_REQUIRED_INCLUDES ${Iconv_INCLUDE_DIRS})

check_c_source_compiles("
#include <iconv.h>

extern size_t iconv(iconv_t cd,
		char **inbuf, size_t *inbytesleft,
		char **outbuf, size_t *outbytesleft);

int main(void)
{
	return 0;
}"
HAVE_NEW_ICONV)
if(HAVE_NEW_ICONV)
	set(HAVE_OLD_ICONV 0)
else()
	set(HAVE_OLD_ICONV 1)
endif()

check_c_source_runs("
#include <iconv.h>
#if ${HAVE_OLD_ICONV}
typedef const char *iconv_ibp;
#else
typedef char *iconv_ibp;
#endif

int main(void)
{
	int v;
	iconv_t conv;
	char in[] = \"a\";
	iconv_ibp pin = in;
	char out[20] = \"\";
	char *pout = out;
	size_t isz = sizeof(in);
	size_t osz = sizeof(out);

	conv = iconv_open(\"UTF-16\", \"UTF-8\");
	iconv(conv, &pin, &isz, &pout, &osz);
	iconv_close(conv);
	v = (unsigned char)(out[0]) + (unsigned char)(out[1]);
	return v != 0xfe + 0xff;
}"
ICONV_DOESNOT_OMIT_BOM)
if(NOT ICONV_DOESNOT_OMIT_BOM)
	add_compile_definitions(ICONV_OMITS_BOM)
endif()

unset(CMAKE_REQUIRED_LIBRARIES)
unset(CMAKE_REQUIRED_INCLUDES)


#programs
set(PROGRAMS_BUILT
	git git-daemon git-http-backend git-sh-i18n--envsubst
	git-shell scalar)

if(NOT CURL_FOUND)
	list(APPEND excluded_progs git-http-fetch git-http-push)
	add_compile_definitions(NO_CURL)
	message(WARNING "git-http-push and git-http-fetch will not be built")
else()
	list(APPEND PROGRAMS_BUILT git-http-fetch git-http-push git-imap-send git-remote-http)
	if(CURL_VERSION_STRING VERSION_GREATER_EQUAL 7.34.0)
		add_compile_definitions(USE_CURL_FOR_IMAP_SEND)
	endif()
endif()

if(NOT EXPAT_FOUND)
	list(APPEND excluded_progs git-http-push)
	add_compile_definitions(NO_EXPAT)
else()
	list(APPEND PROGRAMS_BUILT git-http-push)
	if(EXPAT_VERSION_STRING VERSION_LESS_EQUAL 1.2)
		add_compile_definitions(EXPAT_NEEDS_XMLPARSE_H)
	endif()
endif()

list(REMOVE_DUPLICATES excluded_progs)
list(REMOVE_DUPLICATES PROGRAMS_BUILT)


foreach(p ${excluded_progs})
	list(APPEND EXCLUSION_PROGS --exclude-program ${p} )
endforeach()

#for comparing null values
list(APPEND EXCLUSION_PROGS empty)
set(EXCLUSION_PROGS_CACHE ${EXCLUSION_PROGS} CACHE STRING "Programs not built" FORCE)

if(NOT EXISTS ${CMAKE_BINARY_DIR}/command-list.h OR NOT EXCLUSION_PROGS_CACHE STREQUAL EXCLUSION_PROGS)
	list(REMOVE_ITEM EXCLUSION_PROGS empty)
	message("Generating command-list.h")
	execute_process(COMMAND ${SH_EXE} ${CMAKE_SOURCE_DIR}/generate-cmdlist.sh ${EXCLUSION_PROGS} command-list.txt
			WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
			OUTPUT_FILE ${CMAKE_BINARY_DIR}/command-list.h)
endif()

if(NOT EXISTS ${CMAKE_BINARY_DIR}/config-list.h)
	message("Generating config-list.h")
	execute_process(COMMAND ${SH_EXE} ${CMAKE_SOURCE_DIR}/generate-configlist.sh
			WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
			OUTPUT_FILE ${CMAKE_BINARY_DIR}/config-list.h)
endif()

if(NOT EXISTS ${CMAKE_BINARY_DIR}/hook-list.h)
	message("Generating hook-list.h")
	execute_process(COMMAND ${SH_EXE} ${CMAKE_SOURCE_DIR}/generate-hooklist.sh
			WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
			OUTPUT_FILE ${CMAKE_BINARY_DIR}/hook-list.h)
endif()

include_directories(${CMAKE_BINARY_DIR})

#build
#libgit
parse_makefile_for_sources(libgit_SOURCES "LIB_OBJS")

list(TRANSFORM libgit_SOURCES PREPEND "${CMAKE_SOURCE_DIR}/")
list(TRANSFORM compat_SOURCES PREPEND "${CMAKE_SOURCE_DIR}/")
add_library(libgit ${libgit_SOURCES} ${compat_SOURCES})

#libxdiff
parse_makefile_for_sources(libxdiff_SOURCES "XDIFF_OBJS")

list(TRANSFORM libxdiff_SOURCES PREPEND "${CMAKE_SOURCE_DIR}/")
add_library(xdiff STATIC ${libxdiff_SOURCES})

#reftable
parse_makefile_for_sources(reftable_SOURCES "REFTABLE_OBJS")

list(TRANSFORM reftable_SOURCES PREPEND "${CMAKE_SOURCE_DIR}/")
add_library(reftable STATIC ${reftable_SOURCES})

if(WIN32)
	if(NOT MSVC)#use windres when compiling with gcc and clang
		add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/git.res
				COMMAND ${WINDRES_EXE} -O coff -DMAJOR=${PROJECT_VERSION_MAJOR} -DMINOR=${PROJECT_VERSION_MINOR}
					-DMICRO=${PROJECT_VERSION_PATCH} -DPATCHLEVEL=0 -DGIT_VERSION="\\\"${PROJECT_VERSION}.GIT\\\""
					-i ${CMAKE_SOURCE_DIR}/git.rc -o ${CMAKE_BINARY_DIR}/git.res
				WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
				VERBATIM)
	else()#MSVC use rc
		add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/git.res
				COMMAND ${CMAKE_RC_COMPILER} /d MAJOR=${PROJECT_VERSION_MAJOR} /d MINOR=${PROJECT_VERSION_MINOR}
					/d MICRO=${PROJECT_VERSION_PATCH} /d PATCHLEVEL=0 /d GIT_VERSION="${PROJECT_VERSION}.GIT"
					/fo ${CMAKE_BINARY_DIR}/git.res ${CMAKE_SOURCE_DIR}/git.rc
				WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
				VERBATIM)
	endif()
	add_custom_target(git-rc DEPENDS ${CMAKE_BINARY_DIR}/git.res)
endif()

#link all required libraries to common-main
add_library(common-main OBJECT ${CMAKE_SOURCE_DIR}/common-main.c)

target_link_libraries(common-main libgit xdiff reftable ${ZLIB_LIBRARIES})
if(Intl_FOUND)
	target_link_libraries(common-main ${Intl_LIBRARIES})
endif()
if(Iconv_FOUND)
	target_link_libraries(common-main ${Iconv_LIBRARIES})
endif()
if(PCRE2_FOUND)
	target_link_libraries(common-main ${PCRE2_LIBRARIES})
	target_link_directories(common-main PUBLIC ${PCRE2_LIBRARY_DIRS})
endif()
if(WIN32)
	target_link_libraries(common-main ws2_32 ntdll ${CMAKE_BINARY_DIR}/git.res)
	add_dependencies(common-main git-rc)
	if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
		target_link_options(common-main PUBLIC -municode -Wl,--nxcompat -Wl,--dynamicbase -Wl,--pic-executable,-e,mainCRTStartup)
	elseif(CMAKE_C_COMPILER_ID STREQUAL "Clang")
		target_link_options(common-main PUBLIC -municode -Wl,-nxcompat -Wl,-dynamicbase -Wl,-entry:wmainCRTStartup -Wl,invalidcontinue.obj)
	elseif(CMAKE_C_COMPILER_ID STREQUAL "MSVC")
		target_link_options(common-main PUBLIC /IGNORE:4217 /IGNORE:4049 /NOLOGO /ENTRY:wmainCRTStartup /SUBSYSTEM:CONSOLE invalidcontinue.obj)
	else()
		message(FATAL_ERROR "Unhandled compiler: ${CMAKE_C_COMPILER_ID}")
	endif()
elseif(UNIX)
	target_link_libraries(common-main pthread rt)
endif()

#git
parse_makefile_for_sources(git_SOURCES "BUILTIN_OBJS")

list(TRANSFORM git_SOURCES PREPEND "${CMAKE_SOURCE_DIR}/")
add_executable(git ${CMAKE_SOURCE_DIR}/git.c ${git_SOURCES})
target_link_libraries(git common-main)

add_executable(git-daemon ${CMAKE_SOURCE_DIR}/daemon.c)
target_link_libraries(git-daemon common-main)

add_executable(git-http-backend ${CMAKE_SOURCE_DIR}/http-backend.c)
target_link_libraries(git-http-backend common-main)

add_executable(git-sh-i18n--envsubst ${CMAKE_SOURCE_DIR}/sh-i18n--envsubst.c)
target_link_libraries(git-sh-i18n--envsubst common-main)

add_executable(git-shell ${CMAKE_SOURCE_DIR}/shell.c)
target_link_libraries(git-shell common-main)

add_executable(scalar ${CMAKE_SOURCE_DIR}/scalar.c)
target_link_libraries(scalar common-main)

if(CURL_FOUND)
	add_library(http_obj OBJECT ${CMAKE_SOURCE_DIR}/http.c)

	add_executable(git-imap-send ${CMAKE_SOURCE_DIR}/imap-send.c)
	target_link_libraries(git-imap-send http_obj common-main ${CURL_LIBRARIES})

	add_executable(git-http-fetch ${CMAKE_SOURCE_DIR}/http-walker.c ${CMAKE_SOURCE_DIR}/http-fetch.c)
	target_link_libraries(git-http-fetch http_obj common-main ${CURL_LIBRARIES})

	add_executable(git-remote-http ${CMAKE_SOURCE_DIR}/http-walker.c ${CMAKE_SOURCE_DIR}/remote-curl.c)
	target_link_libraries(git-remote-http http_obj common-main ${CURL_LIBRARIES} )

	if(EXPAT_FOUND)
		add_executable(git-http-push ${CMAKE_SOURCE_DIR}/http-push.c)
		target_link_libraries(git-http-push http_obj common-main ${CURL_LIBRARIES} ${EXPAT_LIBRARIES})
	endif()
endif()

parse_makefile_for_executables(git_builtin_extra "BUILT_INS")

option(SKIP_DASHED_BUILT_INS "Skip hardlinking the dashed versions of the built-ins")

#Creating hardlinks
if(NOT SKIP_DASHED_BUILT_INS)
foreach(s ${git_SOURCES} ${git_builtin_extra})
	string(REPLACE "${CMAKE_SOURCE_DIR}/builtin/" "" s ${s})
	string(REPLACE ".c" "" s ${s})
	file(APPEND ${CMAKE_BINARY_DIR}/CreateLinks.cmake "file(CREATE_LINK git${EXE_EXTENSION} git-${s}${EXE_EXTENSION})\n")
	list(APPEND git_links ${CMAKE_BINARY_DIR}/git-${s}${EXE_EXTENSION})
endforeach()
endif()

if(CURL_FOUND)
	set(remote_exes
		git-remote-https git-remote-ftp git-remote-ftps)
	foreach(s ${remote_exes})
		file(APPEND ${CMAKE_BINARY_DIR}/CreateLinks.cmake "file(CREATE_LINK git-remote-http${EXE_EXTENSION} ${s}${EXE_EXTENSION})\n")
		list(APPEND git_http_links ${CMAKE_BINARY_DIR}/${s}${EXE_EXTENSION})
	endforeach()
endif()

add_custom_command(OUTPUT ${git_links} ${git_http_links}
		COMMAND ${CMAKE_COMMAND} -P ${CMAKE_BINARY_DIR}/CreateLinks.cmake
		DEPENDS git git-remote-http)
add_custom_target(git-links ALL DEPENDS ${git_links} ${git_http_links})

function(write_script path content)
	file(WRITE ${path} ${content})

	if(WIN32)
		message(TRACE "skipping chmod +x '${path}' on Windows")
	elseif("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" VERSION_GREATER_EQUAL "3.19")
		file(CHMOD ${path} FILE_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE)
	else()
		execute_process(COMMAND chmod +x ${path}
				RESULT_VARIABLE CHILD_ERROR)
		if(CHILD_ERROR)
			message(FATAL_ERROR "failed to chmod +x '${path}': '${CHILD_ERROR}'")
		endif()
	endif()
endfunction()

#creating required scripts
set(SHELL_PATH /bin/sh)
set(PERL_PATH /usr/bin/perl)
set(LOCALEDIR ${FALLBACK_RUNTIME_PREFIX}/share/locale)
set(GITWEBDIR ${FALLBACK_RUNTIME_PREFIX}/share/locale)
set(INSTLIBDIR ${FALLBACK_RUNTIME_PREFIX}/share/perl5)

#shell scripts
parse_makefile_for_scripts(git_sh_scripts "SCRIPT_SH" ".sh")
parse_makefile_for_scripts(git_shlib_scripts "SCRIPT_LIB" "")
set(git_shell_scripts
	${git_sh_scripts} ${git_shlib_scripts} git-instaweb)

foreach(script ${git_shell_scripts})
	file(STRINGS ${CMAKE_SOURCE_DIR}/${script}.sh content NEWLINE_CONSUME)
	string(REPLACE "@SHELL_PATH@" "${SHELL_PATH}" content "${content}")
	string(REPLACE "@@DIFF@@" "diff" content "${content}")
	string(REPLACE "@LOCALEDIR@" "${LOCALEDIR}" content "${content}")
	string(REPLACE "@GITWEBDIR@" "${GITWEBDIR}" content "${content}")
	string(REPLACE "@@NO_CURL@@" "" content "${content}")
	string(REPLACE "@@USE_GETTEXT_SCHEME@@" "" content "${content}")
	string(REPLACE "# @@BROKEN_PATH_FIX@@" "" content "${content}")
	string(REPLACE "@@PERL@@" "${PERL_PATH}" content "${content}")
	string(REPLACE "@@PAGER_ENV@@" "LESS=FRX LV=-c" content "${content}")
	write_script(${CMAKE_BINARY_DIR}/${script} "${content}")
endforeach()

#perl scripts
parse_makefile_for_scripts(git_perl_scripts "SCRIPT_PERL" ".perl")

#create perl header
file(STRINGS ${CMAKE_SOURCE_DIR}/perl/header_templates/fixed_prefix.template.pl perl_header )
string(REPLACE "@@PATHSEP@@" ":" perl_header "${perl_header}")
string(REPLACE "@@INSTLIBDIR@@" "${INSTLIBDIR}" perl_header "${perl_header}")

foreach(script ${git_perl_scripts})
	file(STRINGS ${CMAKE_SOURCE_DIR}/${script}.perl content NEWLINE_CONSUME)
	string(REPLACE "#!/usr/bin/perl" "#!/usr/bin/perl\n${perl_header}\n" content "${content}")
	string(REPLACE "@@GIT_VERSION@@" "${PROJECT_VERSION}" content "${content}")
	write_script(${CMAKE_BINARY_DIR}/${script} "${content}")
endforeach()

#python script
file(STRINGS ${CMAKE_SOURCE_DIR}/git-p4.py content NEWLINE_CONSUME)
string(REPLACE "#!/usr/bin/env python" "#!/usr/bin/python" content "${content}")
write_script(${CMAKE_BINARY_DIR}/git-p4 "${content}")

#perl modules
file(GLOB_RECURSE perl_modules "${CMAKE_SOURCE_DIR}/perl/*.pm")

foreach(pm ${perl_modules})
	string(REPLACE "${CMAKE_SOURCE_DIR}/perl/" "" file_path ${pm})
	file(STRINGS ${pm} content NEWLINE_CONSUME)
	string(REPLACE "@@LOCALEDIR@@" "${LOCALEDIR}" content "${content}")
	string(REPLACE "@@NO_PERL_CPAN_FALLBACKS@@" "" content "${content}")
	file(WRITE ${CMAKE_BINARY_DIR}/perl/build/lib/${file_path} ${content})
#test-lib.sh requires perl/build/lib to be the build directory of perl modules
endforeach()


#templates
file(GLOB templates "${CMAKE_SOURCE_DIR}/templates/*")
list(TRANSFORM templates REPLACE "${CMAKE_SOURCE_DIR}/templates/" "")
list(REMOVE_ITEM templates ".gitignore")
list(REMOVE_ITEM templates "Makefile")
list(REMOVE_ITEM templates "blt")# Prevents an error when reconfiguring for in source builds

list(REMOVE_ITEM templates "branches--")
file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/templates/blt/branches) #create branches

#templates have @.*@ replacement so use configure_file instead
foreach(tm ${templates})
	string(REPLACE "--" "/" blt_tm ${tm})
	string(REPLACE "this" "" blt_tm ${blt_tm})# for this--
	configure_file(${CMAKE_SOURCE_DIR}/templates/${tm} ${CMAKE_BINARY_DIR}/templates/blt/${blt_tm} @ONLY)
endforeach()


#translations
if(MSGFMT_EXE)
	file(GLOB po_files "${CMAKE_SOURCE_DIR}/po/*.po")
	list(TRANSFORM po_files REPLACE "${CMAKE_SOURCE_DIR}/po/" "")
	list(TRANSFORM po_files REPLACE ".po" "")
	foreach(po ${po_files})
		file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/po/build/locale/${po}/LC_MESSAGES)
		add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/po/build/locale/${po}/LC_MESSAGES/git.mo
				COMMAND ${MSGFMT_EXE} --check -o ${CMAKE_BINARY_DIR}/po/build/locale/${po}/LC_MESSAGES/git.mo ${CMAKE_SOURCE_DIR}/po/${po}.po)
		list(APPEND po_gen ${CMAKE_BINARY_DIR}/po/build/locale/${po}/LC_MESSAGES/git.mo)
	endforeach()
	add_custom_target(po-gen ALL DEPENDS ${po_gen})
endif()


#to help with the install
list(TRANSFORM git_shell_scripts PREPEND "${CMAKE_BINARY_DIR}/")
list(TRANSFORM git_perl_scripts PREPEND "${CMAKE_BINARY_DIR}/")

#install
foreach(program ${PROGRAMS_BUILT})
if(program MATCHES "^(git|git-shell|scalar)$")
install(TARGETS ${program}
	RUNTIME DESTINATION bin)
else()
install(TARGETS ${program}
	RUNTIME DESTINATION libexec/git-core)
endif()
endforeach()

install(PROGRAMS ${CMAKE_BINARY_DIR}/git-cvsserver
	DESTINATION bin)

set(bin_links
	git-receive-pack git-upload-archive git-upload-pack)

foreach(b ${bin_links})
install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git${EXE_EXTENSION} ${CMAKE_INSTALL_PREFIX}/bin/${b}${EXE_EXTENSION})")
endforeach()

install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git${EXE_EXTENSION} ${CMAKE_INSTALL_PREFIX}/libexec/git-core/git${EXE_EXTENSION})")
install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git-shell${EXE_EXTENSION} ${CMAKE_INSTALL_PREFIX}/libexec/git-core/git-shell${EXE_EXTENSION})")

foreach(b ${git_links})
	string(REPLACE "${CMAKE_BINARY_DIR}" "" b ${b})
	install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git${EXE_EXTENSION} ${CMAKE_INSTALL_PREFIX}/libexec/git-core/${b})")
endforeach()

foreach(b ${git_http_links})
	string(REPLACE "${CMAKE_BINARY_DIR}" "" b ${b})
	install(CODE "file(CREATE_LINK  ${CMAKE_INSTALL_PREFIX}/libexec/git-core/git-remote-http${EXE_EXTENSION} ${CMAKE_INSTALL_PREFIX}/libexec/git-core/${b})")
endforeach()

install(PROGRAMS ${git_shell_scripts} ${git_perl_scripts} ${CMAKE_BINARY_DIR}/git-p4
	DESTINATION libexec/git-core)

install(DIRECTORY ${CMAKE_SOURCE_DIR}/mergetools DESTINATION libexec/git-core)
install(DIRECTORY ${CMAKE_BINARY_DIR}/perl/build/lib/ DESTINATION share/perl5
	FILES_MATCHING PATTERN "*.pm")
install(DIRECTORY ${CMAKE_BINARY_DIR}/templates/blt/ DESTINATION share/git-core/templates)

if(MSGFMT_EXE)
	install(DIRECTORY ${CMAKE_BINARY_DIR}/po/build/locale DESTINATION share)
endif()


if(BUILD_TESTING)

#tests-helpers
add_executable(test-fake-ssh ${CMAKE_SOURCE_DIR}/t/helper/test-fake-ssh.c)
target_link_libraries(test-fake-ssh common-main)

#reftable-tests
parse_makefile_for_sources(test-reftable_SOURCES "REFTABLE_TEST_OBJS")
list(TRANSFORM test-reftable_SOURCES PREPEND "${CMAKE_SOURCE_DIR}/")

#test-tool
parse_makefile_for_sources(test-tool_SOURCES "TEST_BUILTINS_OBJS")

list(TRANSFORM test-tool_SOURCES PREPEND "${CMAKE_SOURCE_DIR}/t/helper/")
add_executable(test-tool ${CMAKE_SOURCE_DIR}/t/helper/test-tool.c ${test-tool_SOURCES} ${test-reftable_SOURCES})
target_link_libraries(test-tool common-main)

set_target_properties(test-fake-ssh test-tool
			PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/t/helper)

if(MSVC)
	set_target_properties(test-fake-ssh test-tool
				PROPERTIES RUNTIME_OUTPUT_DIRECTORY_DEBUG ${CMAKE_BINARY_DIR}/t/helper)
	set_target_properties(test-fake-ssh test-tool
				PROPERTIES RUNTIME_OUTPUT_DIRECTORY_RELEASE ${CMAKE_BINARY_DIR}/t/helper)
endif()

#wrapper scripts
set(wrapper_scripts
	git git-upload-pack git-receive-pack git-upload-archive git-shell git-remote-ext scalar)

set(wrapper_test_scripts
	test-fake-ssh test-tool)


foreach(script ${wrapper_scripts})
	file(STRINGS ${CMAKE_SOURCE_DIR}/wrap-for-bin.sh content NEWLINE_CONSUME)
	string(REPLACE "@@BUILD_DIR@@" "${CMAKE_BINARY_DIR}" content "${content}")
	string(REPLACE "@@PROG@@" "${script}${EXE_EXTENSION}" content "${content}")
	write_script(${CMAKE_BINARY_DIR}/bin-wrappers/${script} "${content}")
endforeach()

foreach(script ${wrapper_test_scripts})
	file(STRINGS ${CMAKE_SOURCE_DIR}/wrap-for-bin.sh content NEWLINE_CONSUME)
	string(REPLACE "@@BUILD_DIR@@" "${CMAKE_BINARY_DIR}" content "${content}")
	string(REPLACE "@@PROG@@" "t/helper/${script}${EXE_EXTENSION}" content "${content}")
	write_script(${CMAKE_BINARY_DIR}/bin-wrappers/${script} "${content}")
endforeach()

file(STRINGS ${CMAKE_SOURCE_DIR}/wrap-for-bin.sh content NEWLINE_CONSUME)
string(REPLACE "@@BUILD_DIR@@" "${CMAKE_BINARY_DIR}" content "${content}")
string(REPLACE "@@PROG@@" "git-cvsserver" content "${content}")
write_script(${CMAKE_BINARY_DIR}/bin-wrappers/git-cvsserver "${content}")

#options for configuring test options
option(PERL_TESTS "Perform tests that use perl" ON)
option(PYTHON_TESTS "Perform tests that use python" ON)

#GIT-BUILD-OPTIONS
set(TEST_SHELL_PATH ${SHELL_PATH})
set(DIFF diff)
set(PYTHON_PATH /usr/bin/python)
set(TAR tar)
set(NO_CURL )
set(NO_EXPAT )
set(USE_LIBPCRE2 )
set(NO_PERL )
set(NO_PTHREADS )
set(NO_PYTHON )
set(PAGER_ENV "LESS=FRX LV=-c")
set(RUNTIME_PREFIX true)
set(NO_GETTEXT )

if(NOT CURL_FOUND)
	set(NO_CURL 1)
endif()

if(NOT EXPAT_FOUND)
	set(NO_EXPAT 1)
endif()

if(NOT Intl_FOUND)
	set(NO_GETTEXT 1)
endif()

if(NOT PERL_TESTS)
	set(NO_PERL 1)
endif()

if(NOT PYTHON_TESTS)
	set(NO_PYTHON 1)
endif()

file(WRITE ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "SHELL_PATH='${SHELL_PATH}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "TEST_SHELL_PATH='${TEST_SHELL_PATH}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "PERL_PATH='${PERL_PATH}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "DIFF='${DIFF}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "PYTHON_PATH='${PYTHON_PATH}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "TAR='${TAR}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_CURL='${NO_CURL}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_EXPAT='${NO_EXPAT}'\n")
if(PCRE2_FOUND)
	file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "USE_LIBPCRE2='YesPlease'\n")
endif()
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_PERL='${NO_PERL}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_PTHREADS='${NO_PTHREADS}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_UNIX_SOCKETS='${NO_UNIX_SOCKETS}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "PAGER_ENV='${PAGER_ENV}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "X='${EXE_EXTENSION}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_GETTEXT='${NO_GETTEXT}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "RUNTIME_PREFIX='${RUNTIME_PREFIX}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_PYTHON='${NO_PYTHON}'\n")
file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "SUPPORTS_SIMPLE_IPC='${SUPPORTS_SIMPLE_IPC}'\n")
if(USE_VCPKG)
	file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "PATH=\"$PATH:$TEST_DIRECTORY/../compat/vcbuild/vcpkg/installed/x64-windows/bin\"\n")
endif()

set(GIT_CTEST_SETS_BUILD_DIR_DOC "find cmake build dir via ctest-set GIT-BUILD-DIR?")
if(DEFINED ENV{GIT_CTEST_SETS_BUILD_DIR})
	set(GIT_CTEST_SETS_BUILD_DIR "$ENV{GIT_CTEST_SETS_BUILD_DIR}"
		CACHE BOOL GIT_CTEST_SETS_BUILD_DIR_DOC)
elseif(WIN32)
	set(GIT_CTEST_SETS_BUILD_DIR "ON" CACHE BOOL GIT_CTEST_SETS_BUILD_DIR_DOC)
else()
	set(GIT_CTEST_SETS_BUILD_DIR "OFF" CACHE BOOL GIT_CTEST_SETS_BUILD_DIR_DOC)
endif()
if(GIT_CTEST_SETS_BUILD_DIR)
	message(STATUS "Have GIT_CTEST_SETS_BUILD_DIR=ON. Need a 'ctest' run to write GIT-BUILD-DIR")
else()
	message(STATUS "Have GIT_CTEST_SETS_BUILD_DIR=OFF. Wrote out a GIT-BUILD-DIR, no 'ctest' required")
endif()

# When using GIT_CTEST_SETS_BUILD_DIR, running the tests from the "t/"
# directory will only work once "ctest" has been run, as we write to
# "GIT-BUILD-DIR" from the optional "ctest" invocation following the
# "cmake"
if(GIT_CTEST_SETS_BUILD_DIR)
	get_filename_component(CACHE_PATH ${CMAKE_CURRENT_LIST_DIR}/../../CMakeCache.txt ABSOLUTE)
	if(NOT ${CMAKE_BINARY_DIR}/CMakeCache.txt STREQUAL ${CACHE_PATH})
		file(WRITE ${CMAKE_BINARY_DIR}/CTestCustom.cmake
			"file(WRITE ${CMAKE_SOURCE_DIR}/GIT-BUILD-DIR \"${CMAKE_BINARY_DIR}\")")
	endif()
else()
	file(WRITE "${CMAKE_SOURCE_DIR}/GIT-BUILD-DIR" "${CMAKE_BINARY_DIR}")
endif()

file(GLOB test_scipts "${CMAKE_SOURCE_DIR}/t/t[0-9]*.sh")

if(DEFINED ENV{GIT_TEST_OPTS})
	set(GIT_TEST_OPTS "$ENV{GIT_TEST_OPTS}"
		CACHE STRING "test options, see t/README")
	message(STATUS "Using user-selected test options: ${GIT_TEST_OPTS}")
elseif(WIN32)
	set(GIT_TEST_OPTS "--no-bin-wrappers --no-chain-lint -vx"
		CACHE STRING "test options, see t/README")
	message(STATUS "Using Windows-specific default test options: ${GIT_TEST_OPTS}")
else()
	set(GIT_TEST_OPTS ""
		CACHE STRING "test options, see t/README")
	message(STATUS "No custom test options selected, set e.g. GIT_TEST_OPTS=\"-vixd\"")
endif()
separate_arguments(GIT_TEST_OPTS)

#test
foreach(tsh ${test_scipts})
	add_test(NAME ${tsh}
		COMMAND ${SH_EXE} ${tsh} ${GIT_TEST_OPTS}
		WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/t)
if(NOT GIT_CTEST_SETS_BUILD_DIR)
	set_property(TEST ${tsh} APPEND PROPERTY ENVIRONMENT
		GIT_TEST_PREFER_BUILD_DIR_ENV="Yes, ignore GIT-BUILD-DIR"
		GIT_TEST_BUILD_DIR=${CMAKE_BINARY_DIR})
endif()
endforeach()

if(WIN32)
	# This test script takes an extremely long time and is known to time out even
	# on fast machines because it requires in excess of one hour to run
	set_tests_properties("${CMAKE_SOURCE_DIR}/t/t7112-reset-submodule.sh" PROPERTIES TIMEOUT 4000)
endif()

endif()#BUILD_TESTING

debug log:

solving 9e3e46c93f5 ...
found 9e3e46c93f5 in https://public-inbox.org/git/patch-v6-13.15-6c6b530965d-20221206T001617Z-avarab@gmail.com/
found 139498c5d5b in https://public-inbox.org/git/patch-v6-12.15-4905ce5321d-20221206T001617Z-avarab@gmail.com/
found 034ab2c879a in https://public-inbox.org/git/patch-v6-11.15-e25992b16f1-20221206T001617Z-avarab@gmail.com/
found 385e4e9d772 in https://public-inbox.org/git/patch-v6-10.15-65204463730-20221206T001617Z-avarab@gmail.com/
found 2d66d471acb in https://public-inbox.org/git/patch-v6-07.15-973c8038f54-20221206T001617Z-avarab@gmail.com/
found ad47430f9be in https://public-inbox.org/git/patch-v6-06.15-1f326944a07-20221206T001617Z-avarab@gmail.com/
found 7a2c3681e0d in https://public-inbox.org/git/patch-v6-05.15-82ecb797915-20221206T001617Z-avarab@gmail.com/
found c641e9349c9 in https://public-inbox.org/git/patch-1.6-95a6ce2f1c7-20221219T183623Z-avarab@gmail.com/ ||
	https://public-inbox.org/git/patch-v6-04.15-7b7850c00ee-20221206T001617Z-avarab@gmail.com/ ||
	https://public-inbox.org/git/patch-v5-04.15-e86245ffbab-20221202T110947Z-avarab@gmail.com/
found 80290edd72a in https://public-inbox.org/git/patch-2.2-d6058ed0f22-20221219T102813Z-avarab@gmail.com/ ||
	https://public-inbox.org/git/patch-v5-03.15-5c4ba2425b6-20221202T110947Z-avarab@gmail.com/ ||
	https://public-inbox.org/git/patch-v6-03.15-b9ddb5db1d3-20221206T001617Z-avarab@gmail.com/
found 5b22a9b217f in https://public-inbox.org/git/patch-1.2-2411acc9d4c-20221219T102813Z-avarab@gmail.com/ ||
	https://public-inbox.org/git/patch-v6-02.15-1a11aa233a3-20221206T001617Z-avarab@gmail.com/ ||
	https://public-inbox.org/git/patch-v5-02.15-314c5e40cff-20221202T110947Z-avarab@gmail.com/
found 8f8b6f375f7 in https://public-inbox.org/git/patch-v5-01.15-7d83ff44c61-20221202T110947Z-avarab@gmail.com/ ||
	https://public-inbox.org/git/patch-v6-01.15-fc190b379cd-20221206T001617Z-avarab@gmail.com/ ||
	https://public-inbox.org/git/patch-1.1-0fa41115261-20221219T102205Z-avarab@gmail.com/
found 2f6e0197ffa in https://80x24.org/mirrors/git.git
preparing index
index prepared:
100644 2f6e0197ffa489ccc14b0665cdf78dba43b39e3e	contrib/buildsystems/CMakeLists.txt

applying [1/11] https://public-inbox.org/git/patch-v5-01.15-7d83ff44c61-20221202T110947Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index 2f6e0197ffa..8f8b6f375f7 100644

Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.

skipping https://public-inbox.org/git/patch-v6-01.15-fc190b379cd-20221206T001617Z-avarab@gmail.com/ for 8f8b6f375f7
skipping https://public-inbox.org/git/patch-1.1-0fa41115261-20221219T102205Z-avarab@gmail.com/ for 8f8b6f375f7
index at:
100644 8f8b6f375f720ded9549a3f1d029af98d54404c2	contrib/buildsystems/CMakeLists.txt

applying [2/11] https://public-inbox.org/git/patch-1.2-2411acc9d4c-20221219T102813Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index 8f8b6f375f7..5b22a9b217f 100644

Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.

skipping https://public-inbox.org/git/patch-v6-02.15-1a11aa233a3-20221206T001617Z-avarab@gmail.com/ for 5b22a9b217f
skipping https://public-inbox.org/git/patch-v5-02.15-314c5e40cff-20221202T110947Z-avarab@gmail.com/ for 5b22a9b217f
index at:
100644 5b22a9b217fe602a503d6f24320b9f63e945efa4	contrib/buildsystems/CMakeLists.txt

applying [3/11] https://public-inbox.org/git/patch-2.2-d6058ed0f22-20221219T102813Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index 5b22a9b217f..80290edd72a 100644

Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.

skipping https://public-inbox.org/git/patch-v5-03.15-5c4ba2425b6-20221202T110947Z-avarab@gmail.com/ for 80290edd72a
skipping https://public-inbox.org/git/patch-v6-03.15-b9ddb5db1d3-20221206T001617Z-avarab@gmail.com/ for 80290edd72a
index at:
100644 80290edd72a8018372bf718fa08bf7fe8c4e9a91	contrib/buildsystems/CMakeLists.txt

applying [4/11] https://public-inbox.org/git/patch-1.6-95a6ce2f1c7-20221219T183623Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index 80290edd72a..c641e9349c9 100644

Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.

skipping https://public-inbox.org/git/patch-v6-04.15-7b7850c00ee-20221206T001617Z-avarab@gmail.com/ for c641e9349c9
skipping https://public-inbox.org/git/patch-v5-04.15-e86245ffbab-20221202T110947Z-avarab@gmail.com/ for c641e9349c9
index at:
100644 c641e9349c9c13177547e874b9e750f5fda494c7	contrib/buildsystems/CMakeLists.txt

applying [5/11] https://public-inbox.org/git/patch-v6-05.15-82ecb797915-20221206T001617Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index c641e9349c9..7a2c3681e0d 100644


applying [6/11] https://public-inbox.org/git/patch-v6-06.15-1f326944a07-20221206T001617Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index 7a2c3681e0d..ad47430f9be 100644


applying [7/11] https://public-inbox.org/git/patch-v6-07.15-973c8038f54-20221206T001617Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index ad47430f9be..2d66d471acb 100644


applying [8/11] https://public-inbox.org/git/patch-v6-10.15-65204463730-20221206T001617Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index 2d66d471acb..385e4e9d772 100644


applying [9/11] https://public-inbox.org/git/patch-v6-11.15-e25992b16f1-20221206T001617Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index 385e4e9d772..034ab2c879a 100644


applying [10/11] https://public-inbox.org/git/patch-v6-12.15-4905ce5321d-20221206T001617Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index 034ab2c879a..139498c5d5b 100644


applying [11/11] https://public-inbox.org/git/patch-v6-13.15-6c6b530965d-20221206T001617Z-avarab@gmail.com/
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index 139498c5d5b..9e3e46c93f5 100644

Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.
Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.
Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.
Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.
Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.
Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.
Checking patch contrib/buildsystems/CMakeLists.txt...
Applied patch contrib/buildsystems/CMakeLists.txt cleanly.

index at:
100644 9e3e46c93f58e859c9054e8d9b8905fedd535165	contrib/buildsystems/CMakeLists.txt

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