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2011-04-13remove doubled words, e.g., s/to to/to/, and fix related typosJim Meyering
I found that some doubled words had snuck back into projects from which I'd already removed them, so now there's a "syntax-check" makefile rule in gnulib to help prevent recurrence. Running the command below spotted a few in git, too: git ls-files | xargs perl -0777 -n \ -e 'while (/\b(then?|[iao]n|i[fst]|but|f?or|at|and|[dt])\s+\1\b/gims)' \ -e '{$n=($` =~ tr/\n/\n/ + 1); ($v=$&)=~s/\n/\\n/g;' \ -e 'print "$ARGV:$n:$v\n"}' Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-02-07mingw_rmdir: set errno=ENOTEMPTY when appropriateJohannes Schindelin
On Windows, EACCES overrules ENOTEMPTY when calling rmdir(). But if the directory is busy, we only want to retry deleting the directory if it is empty, so test specifically for that case and set ENOTEMPTY rather than EACCES. Noticed by Greg Hazel. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-02-07mingw: add fallback for rmdir in case directory is in useHeiko Voigt
The same logic as for unlink and rename also applies to rmdir. For example in case you have a shell open in a git controlled folder. This will easily fail. So lets be nice for such cases as well. Signed-off-by: Heiko Voigt <heiko.voigt@mahr.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-02-07mingw: make failures to unlink or move raise a questionHeiko Voigt
On Windows in case a program is accessing a file unlink or move operations may fail. To give the user a chance to correct this we simply wait until the user asks us to retry or fail. This is useful because of the following use case which seem to happen rarely but when it does it is a mess: After making some changes the user realizes that he was on the incorrect branch. When trying to change the branch some file is still in use by some other process and git stops in the middle of changing branches. Now the user has lots of files with changes mixed with his own. This is especially confusing on repositories that contain lots of files. Although the recent implementation of automatic retry makes this scenario much more unlikely lets provide a fallback as a last resort. Thanks to Albert Dvornik for disabling the question if users can't see it. If the stdout of the command is connected to a terminal but the stderr has been redirected, the odds are good that the user can't see any question we print out to stderr. This will result in a "mysterious hang" while the app is waiting for user input. It seems better to be conservative, and avoid asking for input whenever the stderr is not a terminal, just like we do for stdin. Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Albert Dvornik <dvornik+git@gmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-02-07mingw: work around irregular failures of unlink on windowsHeiko Voigt
If a file is opened by another process (e.g. indexing of an IDE) for reading it is not allowed to be deleted. So in case unlink fails retry after waiting for some time. This extends the workaround from 6ac6f878. Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-02-07mingw: move unlink wrapper to mingw.cHeiko Voigt
The next patch implements a workaround in case unlink fails on Windows. Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-13Merge branch 'ef/win32-dirent'Junio C Hamano
* ef/win32-dirent: win32: use our own dirent.h msvc: opendir: handle paths ending with a slash win32: dirent: handle errors msvc: opendir: do not start the search msvc: opendir: allocate enough memory msvc: opendir: fix malloc-failure Conflicts: Makefile
2010-11-24Merge branch 'maint'Junio C Hamano
* maint: imap-send: link against libcrypto for HMAC and others git-send-email.perl: Deduplicate "to:" and "cc:" entries with names mingw: do not set errno to 0 on success
2010-11-24mingw: do not set errno to 0 on successErik Faye-Lund
Currently do_lstat always sets errno to 0 on success. This incorrectly overwrites previous errors. Fetch the error-code into a temporary variable instead, and assign that to errno on failure. Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-24win32: use our own dirent.hErik Faye-Lund
The mingw-runtime implemenation of opendir, readdir and closedir sets errno to 0 on success, something that POSIX explicitly forbids. 3ba7a06 ("A loose object is not corrupt if it cannot be read due to EMFILE") introduce a dependency on this behaviour, leading to a broken "git clone" on Windows. compat/mingw.c contains an implementation of readdir, and compat/msvc.c contains implementations of opendir and closedir. Move these to compat/win32/dirent.[ch], and change to our own DIR structure at the same time. This provides a generic Win32-implementation of opendir, readdir and closedir which works on both MinGW and MSVC and does not reset errno, and as a result git clone is working again on Windows. Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-24win32: dirent: handle errorsErik Faye-Lund
Previously all error conditions were ignored. Be nice, and set errno when we should. Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-04mingw: use poll-emulation from gnulibErik Faye-Lund
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-04Improve the mingw getaddrinfo stub to handle more use casesMartin Storsjö
Allow the node parameter to be null, which is used for getting the default bind address. Also allow the hints parameter to be null, to improve standard conformance of the stub implementation a little. Signed-off-by: Martin Storsjo <martin@martin.st> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-04mingw: add kill emulationErik Faye-Lund
This is a quite limited kill-emulation; it can only handle SIGTERM on positive pids. However, it's enough for git-daemon. Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-04mingw: support waitpid with pid > 0 and WNOHANGErik Faye-Lund
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-04mingw: use real pidErik Faye-Lund
The Windows port have so far been using process handles in place of PID. However, this is not work consistent with what getpid returns. PIDs are system-global identifiers, but process handles are local to a process. Using PIDs instead of process handles allows, for instance, a user to kill a hung process with the Task Manager, something that would have been impossible with process handles. Change the code to use the real PID, and use OpenProcess to get a process-handle. Store the PID and the process handle in a linked list protected by a critical section, so we can safely close the process handle later. Linked list code written by Pat Thoyts. Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-04mingw: add network-wrappers for daemonMike Pape
git-daemon requires some socket-functionality that is not yet supported in the Windows-port. This patch adds said functionality, and makes sure WSAStartup gets called by socket(), since it is the first network-call in git-daemon. Signed-off-by: Mike Pape <dotzenlabs@gmail.com> Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-10-03Add MinGW-specific execv() override.Eric Sunshine
As of 2dbc887e, shell.c employs execv(), so provide a MinGW-specific mingw_execv() override, complementing existing mingw_execvp() and cousins. As a bonus, this also resolves a compilation warning due to an execv() prototype mismatch between Linux and MinGW. Linux expects the second argument to be (char *const *), whereas MinGW expects (const char *const *). Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de> Acked-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
2010-10-03mingw: do not crash on open(NULL, ...)Erik Faye-Lund
fetch_and_setup_pack_index() apparently pass a NULL-pointer to parse_pack_index(), which in turn pass it to check_packed_git_idx(), which again pass it to open(). Since open() already sets errno correctly for the NULL-case, let's just avoid the problematic strcmp. [PT: squashed in fix for fopen which was missed first time round] Acked-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
2010-10-01MinGW: Report errors when failing to launch the html browser.Pat Thoyts
The mingw function to launch the system html browser is silent if the target file does not exist leaving the user confused. Make it display something. Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net> Reviewed-by: Erik Faye-Lund <kusmabite@gmail.com>
2010-10-01MinGW: fix stat() and lstat() implementations for handling symlinksPat Thoyts
In msysGit the stat() function has been implemented using mingw_lstat which sets the st_mode member to S_IFLNK when a symbolic links is found. This causes the is_executable function to return when git attempts to build a list of available commands in the help code and we end up missing most git commands. (msysGit issue #445) This patch modifies the implementation so that lstat() will return the link flag but if we are called as stat() we read the size of the target and set the mode to that of a regular file. Includes squashed fix st_mode for symlink dirs Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net> Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
2010-08-31Merge branch 'sg/rerere-gc-old-still-used'Junio C Hamano
* sg/rerere-gc-old-still-used: rerere: fix overeager gc mingw_utime(): handle NULL times parameter
2010-08-22Typos in code comments, an error message, documentationRalf Wildenhues
Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-07-13mingw_utime(): handle NULL times parameterSZEDER Gábor
POSIX sayeth: "If times is a null pointer, the access and modification times of the file shall be set to the current time." Let's do so. Signed-off-by: SZEDER Gábor <szeder@ira.uka.de> Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-05-20Fix checkout of large files to network shares on Windows XPRené Scharfe
Bigger writes to network drives on Windows XP fail. Cap them at 31MB to allow them to succeed. Callers need to be prepared for write() calls that do less work than requested anyway. On local drives, write() calls are translated to WriteFile() calls with a cap of 64KB on Windows XP and 256KB on Vista. Thus a cap of 31MB won't affect the number of WriteFile() calls which do the actual work. There's still room for some other version of Windows to use a chunk size of 1MB without increasing the number of system calls. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-04-11Merge branch 'jl/maint-submodule-gitfile-awareness'Junio C Hamano
* jl/maint-submodule-gitfile-awareness: Windows: start_command: Support non-NULL dir in struct child_process
2010-04-11Windows: start_command: Support non-NULL dir in struct child_processJohannes Sixt
A caller of start_command can set the member 'dir' to a directory to request that the child process starts with that directory as CWD. The first user of this feature was added recently in eee49b6 (Teach diff --submodule and status to handle .git files in submodules). On Windows, we have been lazy and had not implemented support for this feature, yet. This fixes the shortcoming. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-03-31Sync with 1.7.0.4Junio C Hamano
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-03-30Windows: fix utime() for read-only filesJohannes Sixt
Starting with 5256b00 (Use git_mkstemp_mode instead of plain mkstemp to create object files, 2010-02-22) utime() is invoked on read-only files. This is not allowed on Windows and results in many warnings of the form failed utime() on .git/objects/23/tmp_obj_VlgHlc: Permission denied during a repack. Fix it by making the file temporarily writable. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-25Windows: redirect f[re]open("/dev/null") to f[re]open("nul")Johannes Sixt
On Windows, the equivalent of "/dev/null" is "nul". This implements compatibility wrappers around fopen() and freopen() that check for this particular file name. The new tests exercise code paths where this is relevant. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-01-17Do not use date.c:tm_to_time_t() from compat/mingw.cJohannes Sixt
To implement gettimeofday(), a broken-down UTC time was requested from the system using GetSystemTime(), then tm_to_time_t() was used to convert it to a time_t because it does not look at the current timezone, which mktime() would do. Use GetSystemTimeAsFileTime() and a different conversion path to avoid this back-reference from the compatibility layer to the generic code. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-01-17MSVC: Windows-native implementation for subset of Pthreads APIAndrzej K. Haczewski
This patch implements native to Windows subset of pthreads API used by Git. It allows to remove Pthreads for Win32 dependency for MSVC, msysgit and Cygwin. [J6t: If the MinGW build was built as part of the msysgit build environment, then threading was already enabled because the pthreads-win32 package is available in msysgit. With this patch, we can now enable threaded code unconditionally.] Signed-off-by: Andrzej K. Haczewski <ahaczewski@gmail.com> Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-01-17Windows: avoid the "dup dance" when spawning a child processJohannes Sixt
When stdin, stdout, or stderr must be redirected for a child process that on Windows is spawned using one of the spawn() functions of Microsoft's C runtime, then there is no choice other than to 1. make a backup copy of fd 0,1,2 with dup 2. dup2 the redirection source fd into 0,1,2 3. spawn 4. dup2 the backup back into 0,1,2 5. close the backup copy and the redirection source We used this idiom as well -- but we are not using the spawn() functions anymore! Instead, we have our own implementation. We had hardcoded that stdin, stdout, and stderr of the child process were inherited from the parent's fds 0, 1, and 2. But we can actually specify any fd. With this patch, the fds to inherit are passed from start_command()'s WIN32 section to our spawn implementation. This way, we can avoid the backup copies of the fds. The backup copies were a bug waiting to surface: The OS handles underlying the dup()ed fds were inherited by the child process (but were not associated with a file descriptor in the child). Consequently, the file or pipe represented by the OS handle remained open even after the backup copy was closed in the parent process until the child exited. Since our implementation of pipe() creates non-inheritable OS handles, we still dup() file descriptors in start_command() because dup() happens to create inheritable duplicates. (A nice side effect is that the fd cleanup in start_command is the same for Windows and Unix and remains unchanged.) Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-01-17Windows: simplify the pipe(2) implementationJohannes Sixt
Our implementation of pipe() must create non-inheritable handles for the reason that when a child process is started, there is no opportunity to close the unneeded pipe ends in the child (on POSIX this is done between fork() and exec()). Previously, we used the _pipe() function provided by Microsoft's C runtime (which creates inheritable handles) and then turned the handles into non-inheritable handles using the DuplicateHandle() API. Simplify the procedure by using the CreatePipe() API, which can create non-inheritable handles right from the beginning. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-01-17Windows: boost startup by avoiding a static dependency on shell32.dllJohannes Sixt
This DLL is only needed to invoke the browser in a "git help" call. By looking up the only function that we need at runtime, we can avoid the startup costs of this DLL. DLL usage can be profiled with Microsoft's Dependency Walker. For example, a call to "git diff-files" loaded before: 19 DLLs after: 9 DLLs As a result, the runtime of 'make -j2 test' went down from 16:00min to 12:40min on one of my boxes. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-11-24Enable support for IPv6 on MinGWMartin Storsjö
The IPv6 support functions are loaded dynamically, to maintain backwards compatibility with versions of Windows prior to XP, and fallback wrappers are provided, implemented in terms of gethostbyname and gethostbyaddr. Signed-off-by: Martin Storsjo <martin@martin.st> Acked-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-11-24Refactor winsock initialization into a separate functionMartin Storsjö
The winsock library must be initialized. Since gethostbyname() is the first function that calls into winsock, it was overridden to do the initialization. This refactoring helps the next patch, where other functions can be called earlier. Signed-off-by: Martin Storsjo <martin@martin.st> Acked-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-11-09MSVC: Add support for building with NO_MMAPRamsay Jones
When the NO_MMAP build variable is set, the msvc linker complains: error LNK2001: unresolved external symbol _getpagesize The msvc libraries do not define the getpagesize() function, so we move the mingw_getpagesize() implementation from the conditionally built win32mmap.c file to mingw.c. Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-09-19Make usage of windows.h lean and meanMarius Storm-Olsen
Centralize the include of windows.h in git-compat-util.h, turn on WIN32_LEAN_AND_MEAN to avoid including plenty of other header files which is not needed in Git. Also ensure we load winsock2.h first, so we don't load the older winsock definitions at a later stage, since they contain duplicate definitions. When moving windows.h into git-compat-util.h, we need to protect the definition of struct pollfd in mingw.h, since this file is used by both MinGW and MSVC, and the latter defines this struct in winsock2.h. We need to keep the windows.h include in compat/win32.h, since its shared by both MinGW and Cygwin, and we're not touching Cygwin in this commit. The include in git-compat-util.h is protected with an ifdef WIN32, which is not the case when compiling for Cygwin. Signed-off-by: Marius Storm-Olsen <mstormo@gmail.com> Acked-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-09-19Fix __stdcall placement and function prototypeFrank Li
MSVC requires __stdcall to be between the functions return value and the function name, and that the function pointer type is in the form of return_type (WINAPI *function_name)(arguments...) Signed-off-by: Frank Li <lznuaa@gmail.com> Signed-off-by: Marius Storm-Olsen <mstormo@gmail.com> Acked-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-09-19Set _O_BINARY as default fmode for both MinGW and MSVCMarius Storm-Olsen
MinGW set the _CRT_fmode to set both the default fmode and _O_BINARY on stdin/stdout/stderr. Rather use the main() define in mingw.h to set this for both MinGW and MSVC. This will ensure that a MinGW and MSVC build will handle input and output identically. Signed-off-by: Marius Storm-Olsen <mstormo@gmail.com> Acked-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-09-19Avoid declaration after statementFrank Li
MSVC does not understand this C99 style. Signed-off-by: Frank Li <lznuaa@gmail.com> Signed-off-by: Marius Storm-Olsen <mstormo@gmail.com> Acked-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-09-11start_command: do not clobber cmd->env on Windows code pathJohannes Sixt
Previously, it would not be possible to call start_command twice for the same struct child_process that has env set. The fix is achieved by moving the loop that modifies the environment block into a helper function. This also allows us to make two other helper functions static. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-06-01MinGW readdir reimplementation to support d_typeMarius Storm-Olsen
The original readdir implementation was fast, but didn't support the d_type. This means that git would do additional lstats for each entry, to figure out if the entry was a directory or not. This unneedingly slowed down many operations, since Windows API provides this information directly when walking the directories. By running this implementation on Moe's repo structure: mkdir bummer && cd bummer; for ((i=0;i<100;i++)); do mkdir $i && pushd $i; for ((j=0;j<1000;j++)); do echo "$j" >$j; done; popd; done We see the following speedups: git add . ------------------- old: 00:00:23(.087) new: 00:00:21(.512) 1.07x git status ------------------- old: 00:00:03(.306) new: 00:00:01(.684) 1.96x git clean -dxf ------------------- old: 00:00:01(.918) new: 00:00:00(.295) 6.50x Signed-off-by: Marius Storm-Olsen <marius@trolltech.com> Signed-off-by: Steffen Prohaska <prohaska@zib.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-06-01MinGW: fix warning about implicit declaration of _getch()Johannes Schindelin
conio.h provides the declaration. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Steffen Prohaska <prohaska@zib.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-23MinGW: Add a simple getpass()Johannes Schindelin
We need getpass() to activate curl on MinGW. Although the default Makefile currently has 'NO_CURL = YesPlease', msysgit releases do provide curl support, so getpass() is used. [spr: - edited commit message. - squashed commit that provides getpass() declaration.] Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Steffen Prohaska <prohaska@zib.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-23MinGW: Scan for \r in addition to \n when reading shbang linesPeter Harris
\r is common on Windows, so we should handle it gracefully. Signed-off-by: Steffen Prohaska <prohaska@zib.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-01Fix a bunch of pointer declarations (codestyle)Felipe Contreras
Essentially; s/type* /type */ as per the coding guidelines. Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-23Fix typos / spelling in commentsMike Ralphson
Signed-off-by: Mike Ralphson <mike@abacus.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-20Windows: Work around intermittent failures in mingw_renameJohannes Sixt
We have replaced rename() with a version that can rename a file to a destination that already exists. Nevertheless, many users, the author included, observe failures in the code that are not reproducible. The theory is that the failures are due to some other process that happens to have opened the destination file briefly at the wrong moment. (And there is no way on Windows to delete or replace a file that is currently open.) The most likely candidate for such a process is a virus scanner. The failure is more often observed while there is heavy git activity (for example while the test suite is running or during a rebase operation). We work around the failure by retrying the rename operation if it failed due to ERROR_ACCESS_DENIED. The retries are delayed a bit: The first only by giving up the time slice, the next after the minimal scheduling granularity, and if more retries are needed, then we wait some non-trivial amount of time with exponential back-off. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>