diff --git a/Makefile b/Makefile index ace3e5a506..5776309365 100644 --- a/Makefile +++ b/Makefile @@ -2779,6 +2779,13 @@ compat/nedmalloc/nedmalloc.sp compat/nedmalloc/nedmalloc.o: EXTRA_CPPFLAGS = \ compat/nedmalloc/nedmalloc.sp: SP_EXTRA_FLAGS += -Wno-non-pointer-null endif +headless-git.o: compat/win32/headless.c GIT-CFLAGS + $(QUIET_CC)$(CC) $(ALL_CFLAGS) $(COMPAT_CFLAGS) \ + -fno-stack-protector -o $@ -c -Wall -Wwrite-strings $< + +headless-git$X: headless-git.o git.res GIT-LDFLAGS + $(QUIET_LINK)$(CC) $(ALL_CFLAGS) $(ALL_LDFLAGS) -mwindows -o $@ $< git.res + git-%$X: %.o GIT-LDFLAGS $(GITLIBS) $(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS) @@ -3658,6 +3665,7 @@ clean: profile-clean coverage-clean cocciclean $(RM) po/git.pot po/git-core.pot $(RM) git.res $(RM) $(OBJECTS) + $(RM) headless-git.o $(RM) $(LIB_FILE) $(XDIFF_LIB) $(REFTABLE_LIB) $(REFTABLE_TEST_LIB) $(RM) $(ALL_PROGRAMS) $(SCRIPT_LIB) $(BUILT_INS) $(OTHER_PROGRAMS) $(RM) $(TEST_PROGRAMS) @@ -3686,6 +3694,7 @@ endif $(RM) GIT-SCRIPT-DEFINES GIT-PERL-DEFINES GIT-PERL-HEADER GIT-PYTHON-VARS ifdef MSVC $(RM) $(patsubst %.o,%.o.pdb,$(OBJECTS)) + $(RM) headless-git.o.pdb $(RM) $(patsubst %.exe,%.pdb,$(OTHER_PROGRAMS)) $(RM) $(patsubst %.exe,%.iobj,$(OTHER_PROGRAMS)) $(RM) $(patsubst %.exe,%.ipdb,$(OTHER_PROGRAMS)) diff --git a/builtin/gc.c b/builtin/gc.c index 19d73067aa..5c4315f0d8 100644 --- a/builtin/gc.c +++ b/builtin/gc.c @@ -2068,7 +2068,7 @@ static int schtasks_schedule_task(const char *exec_path, enum schedule_priority "\n" "\n" "\n" - "\"%s\\git.exe\"\n" + "\"%s\\headless-git.exe\"\n" "--exec-path=\"%s\" for-each-repo --config=maintenance.repo maintenance run --schedule=%s\n" "\n" "\n" diff --git a/compat/win32/headless.c b/compat/win32/headless.c new file mode 100644 index 0000000000..8b00dfe3bd --- /dev/null +++ b/compat/win32/headless.c @@ -0,0 +1,115 @@ +/* + * headless Git - run Git without opening a console window on Windows + */ + +#define STRICT +#define WIN32_LEAN_AND_MEAN +#define UNICODE +#define _UNICODE +#include +#include +#include +#include + +/* + * If `dir` contains the path to a Git exec directory, extend `PATH` to + * include the corresponding `bin/` directory (which is where all those + * `.dll` files needed by `git.exe` are, on Windows). + */ +static int extend_path(wchar_t *dir, size_t dir_len) +{ + const wchar_t *suffix = L"\\libexec\\git-core"; + size_t suffix_len = wcslen(suffix); + wchar_t *env; + DWORD len; + + if (dir_len < suffix_len) + return 0; + + dir_len -= suffix_len; + if (memcmp(dir + dir_len, suffix, suffix_len * sizeof(wchar_t))) + return 0; + + len = GetEnvironmentVariableW(L"PATH", NULL, 0); + if (!len) + return 0; + + env = _alloca((dir_len + 5 + len) * sizeof(wchar_t)); + wcsncpy(env, dir, dir_len); + wcscpy(env + dir_len, L"\\bin;"); + if (!GetEnvironmentVariableW(L"PATH", env + dir_len + 5, len)) + return 0; + + SetEnvironmentVariableW(L"PATH", env); + return 1; +} + +int WINAPI wWinMain(_In_ HINSTANCE instance, + _In_opt_ HINSTANCE previous_instance, + _In_ LPWSTR command_line, _In_ int show) +{ + wchar_t git_command_line[32768]; + size_t size = sizeof(git_command_line) / sizeof(wchar_t); + const wchar_t *needs_quotes = L""; + int slash = 0, i; + + STARTUPINFO startup_info = { + .cb = sizeof(STARTUPINFO), + .dwFlags = STARTF_USESHOWWINDOW, + .wShowWindow = SW_HIDE, + }; + PROCESS_INFORMATION process_info = { 0 }; + DWORD creation_flags = CREATE_UNICODE_ENVIRONMENT | + CREATE_NEW_CONSOLE | CREATE_NO_WINDOW; + DWORD exit_code; + + /* First, determine the full path of argv[0] */ + for (i = 0; _wpgmptr[i]; i++) + if (_wpgmptr[i] == L' ') + needs_quotes = L"\""; + else if (_wpgmptr[i] == L'\\') + slash = i; + + if (slash >= size - 11) + return 127; /* Too long path */ + + /* If it is in Git's exec path, add the bin/ directory to the PATH */ + extend_path(_wpgmptr, slash); + + /* Then, add the full path of `git.exe` as argv[0] */ + i = swprintf_s(git_command_line, size, L"%ls%.*ls\\git.exe%ls", + needs_quotes, slash, _wpgmptr, needs_quotes); + if (i < 0) + return 127; /* Too long path */ + + if (*command_line) { + /* Now, append the command-line arguments */ + i = swprintf_s(git_command_line + i, size - i, + L" %ls", command_line); + if (i < 0) + return 127; + } + + startup_info.hStdInput = GetStdHandle(STD_INPUT_HANDLE); + startup_info.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE); + startup_info.hStdError = GetStdHandle(STD_ERROR_HANDLE); + + if (!CreateProcess(NULL, /* infer argv[0] from the command line */ + git_command_line, /* modified command line */ + NULL, /* inherit process handles? */ + NULL, /* inherit thread handles? */ + FALSE, /* handles inheritable? */ + creation_flags, + NULL, /* use this process' environment */ + NULL, /* use this process' working directory */ + &startup_info, &process_info)) + return 129; /* could not start */ + WaitForSingleObject(process_info.hProcess, INFINITE); + if (!GetExitCodeProcess(process_info.hProcess, &exit_code)) + exit_code = 130; /* Could not determine exit code? */ + + CloseHandle(process_info.hProcess); + CloseHandle(process_info.hThread); + + return (int)exit_code; +} diff --git a/config.mak.uname b/config.mak.uname index 64c44db805..3bb03f423a 100644 --- a/config.mak.uname +++ b/config.mak.uname @@ -526,6 +526,8 @@ else endif X = .exe + EXTRA_PROGRAMS += headless-git$X + compat/msvc.o: compat/msvc.c compat/mingw.c GIT-CFLAGS endif ifeq ($(uname_S),Interix) @@ -705,6 +707,7 @@ ifeq ($(uname_S),MINGW) COMPAT_CFLAGS += -D__USE_MINGW_ANSI_STDIO=0 -DDETECT_MSYS_TTY \ -fstack-protector-strong EXTLIBS += -lntdll + EXTRA_PROGRAMS += headless-git$X INSTALL = /bin/install INTERNAL_QSORT = YesPlease HAVE_LIBCHARSET_H = YesPlease diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt index 4faa419cc3..6b819e2fbd 100644 --- a/contrib/buildsystems/CMakeLists.txt +++ b/contrib/buildsystems/CMakeLists.txt @@ -738,6 +738,15 @@ if(WIN32) else() message(FATAL_ERROR "Unhandled compiler: ${CMAKE_C_COMPILER_ID}") endif() + + add_executable(headless-git ${CMAKE_SOURCE_DIR}/compat/win32/headless.c) + if(CMAKE_C_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_ID STREQUAL "Clang") + target_link_options(headless-git PUBLIC -municode -Wl,-subsystem,windows) + elseif(CMAKE_C_COMPILER_ID STREQUAL "MSVC") + target_link_options(headless-git PUBLIC /NOLOGO /ENTRY:wWinMainCRTStartup /SUBSYSTEM:WINDOWS) + else() + message(FATAL_ERROR "Unhandled compiler: ${CMAKE_C_COMPILER_ID}") + endif() elseif(UNIX) target_link_libraries(common-main pthread rt) endif() diff --git a/contrib/buildsystems/Generators/Vcxproj.pm b/contrib/buildsystems/Generators/Vcxproj.pm index 1a25789d28..b2e68a1671 100644 --- a/contrib/buildsystems/Generators/Vcxproj.pm +++ b/contrib/buildsystems/Generators/Vcxproj.pm @@ -76,7 +76,7 @@ sub createProject { my $libs_release = "\n "; my $libs_debug = "\n "; - if (!$static_library) { + if (!$static_library && $name ne 'headless-git') { $libs_release = join(";", sort(grep /^(?!libgit\.lib|xdiff\/lib\.lib|vcs-svn\/lib\.lib|reftable\/libreftable\.lib)/, @{$$build_structure{"$prefix${name}_LIBS"}})); $libs_debug = $libs_release; $libs_debug =~ s/zlib\.lib/zlibd\.lib/g; @@ -230,7 +230,7 @@ EOM print F << "EOM"; EOM - if (!$static_library || $target =~ 'vcs-svn' || $target =~ 'xdiff') { + if ((!$static_library || $target =~ 'vcs-svn' || $target =~ 'xdiff') && !($name =~ /headless-git/)) { my $uuid_libgit = $$build_structure{"LIBS_libgit_GUID"}; my $uuid_libreftable = $$build_structure{"LIBS_reftable/libreftable_GUID"}; my $uuid_xdiff_lib = $$build_structure{"LIBS_xdiff/lib_GUID"}; diff --git a/contrib/buildsystems/engine.pl b/contrib/buildsystems/engine.pl index ed6c45988a..069be7e4be 100755 --- a/contrib/buildsystems/engine.pl +++ b/contrib/buildsystems/engine.pl @@ -371,6 +371,7 @@ sub handleLinkLine # exit(1); foreach (@objfiles) { my $sourcefile = $_; + $sourcefile =~ s/^headless-git\.o$/compat\/win32\/headless.c/; $sourcefile =~ s/\.o$/.c/; push(@sources, $sourcefile); push(@cflags, @{$compile_options{"${sourcefile}_CFLAGS"}});