Fix regression described in:
https://github.com/git-for-windows/git/issues/1392
which was introduced in:
b2353379bb
Problem Symptoms
================
When the user has a .gitignore file that is a symlink, the fscache
optimization introduced above caused the stat-data from the symlink,
rather that of the target file, to be returned. Later when the ignore
file was read, the buffer length did not match the stat.st_size field
and we called die("cannot use <path> as an exclude file")
Optimization Rationale
======================
The above optimization calls lstat() before open() primarily to ask
fscache if the file exists. It gets the current stat-data as a side
effect essentially for free (since we already have it in memory).
If the file does not exist, it does not need to call open(). And
since very few directories have .gitignore files, we can greatly
reduce time spent in the filesystem.
Discussion of Fix
=================
The above optimization calls lstat() rather than stat() because the
fscache only intercepts lstat() calls. Calls to stat() stay directed
to the mingw_stat() completly bypassing fscache. Furthermore, calls
to mingw_stat() always call {open, fstat, close} so that symlinks are
properly dereferenced, which adds *additional* open/close calls on top
of what the original code in dir.c is doing.
Since the problem only manifests for symlinks, we add code to overwrite
the stat-data when the path is a symlink. This preserves the effect of
the performance gains provided by the fscache in the normal case.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Make fscache_enabled() function public rather than static.
Remove unneeded fscache_is_enabled() function.
Change is_fscache_enabled() macro to call fscache_enabled().
is_fscache_enabled() now takes a pathname so that the answer
is more precise and mean "is fscache enabled for this pathname",
since fscache only stores repo-relative paths and not absolute
paths, we can avoid attempting lookups for absolute paths.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
The hashmap API is just complicated enough that even at least one
long-time Git contributor has to look up how to use it every time he
finds a new use case. When that happens, it is really useful if the
provided example code is correct...
While at it, "fix a memory leak", avoid statements before variable
declarations, fix a const -> no-const cast, several %l specifiers (which
want to be %ld), avoid using an undefined constant, call scanf()
correctly, use FLEX_ALLOC_STR() where appropriate, and adjust the style
here and there.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
The "--format=..." option "git for-each-ref" takes learned to show
the name of the 'remote' repository and the ref at the remote side
that is affected for 'upstream' and 'push' via "%(push:remotename)"
and friends.
* js/for-each-ref-remote-name-and-ref:
for-each-ref: test :remotename and :remoteref
for-each-ref: let upstream/push report the remote ref name
for-each-ref: let upstream/push optionally report the remote name
This is the final iteration that made it into upstream Git's master
branch and that started out as 8148ee40ad (Merge branch
'mingw/ref-filter-remote-name', 2017-10-29).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
When I run git fetch, git tries to find object for each local and remote
refs. Without specifying OBJECT_INFO_QUICK, has_object_file list up
entries in pack directory for each calls.
This patch makes git fetch fast for the repositories having large number
of refs, especially for windows because it's directory list up api is
much slower than linux.
Note: this patch was developed independently also by Jeff King:
https://public-inbox.org/git/20171120202920.7ppcwmzkxifywtoj@sigill.intra.peff.net/
Signed-off-by: Takuto Ikuta <tikuta@chromium.org>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This not only prevents regressions, but also serves as documentation
what this new feature is expected to do.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are times when scripts want to know not only the name of the
push branch on the remote, but also the name of the branch as known
by the remote repository.
An example of this is when a tool wants to push to the very same branch
from which it would pull automatically, i.e. the `<remote>` and the `<to>`
in `git push <remote> <from>:<to>` would be provided by
`%(upstream:remotename)` and `%(upstream:remoteref)`, respectively.
This patch offers the new suffix :remoteref for the `upstream` and `push`
atoms, allowing to show exactly that. Example:
$ cat .git/config
...
[remote "origin"]
url = https://where.do.we.come/from
fetch = refs/heads/*:refs/remote/origin/*
[branch "master"]
remote = origin
merge = refs/heads/master
[branch "develop/with/topics"]
remote = origin
merge = refs/heads/develop/with/topics
...
$ git for-each-ref \
--format='%(push) %(push:remoteref)' \
refs/heads
refs/remotes/origin/master refs/heads/master
refs/remotes/origin/develop/with/topics refs/heads/develop/with/topics
Signed-off-by: J Wyman <jwyman@microsoft.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are times when e.g. scripts want to know not only the name of the
upstream branch on the remote repository, but also the name of the
remote.
This patch offers the new suffix :remotename for the upstream and for
the push atoms, allowing to show exactly that. Example:
$ cat .git/config
...
[remote "origin"]
url = https://where.do.we.come/from
fetch = refs/heads/*:refs/remote/origin/*
[remote "hello-world"]
url = https://hello.world/git
fetch = refs/heads/*:refs/remote/origin/*
pushURL = hello.world:git
push = refs/heads/*:refs/heads/*
[branch "master"]
remote = origin
pushRemote = hello-world
...
$ git for-each-ref \
--format='%(upstream) %(upstream:remotename) %(push:remotename)' \
refs/heads/master
refs/remotes/origin/master origin hello-world
The implementation chooses *not* to DWIM the push remote if no explicit
push remote was configured; The reason is that it is possible to DWIM this
by using
%(if)%(push:remotename)%(then)
%(push:remotename)
%(else)
%(upstream:remotename)
%(end)
while it would be impossible to "un-DWIM" the information in case the
caller is really only interested in explicit push remotes.
While `:remote` would be shorter, it would also be a bit more ambiguous,
and it would also shut the door e.g. for `:remoteref` (which would
obviously refer to the corresponding ref in the remote repository).
Note: the dashless, non-CamelCased form `:remotename` follows the
example of the `:trackshort` example.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The option is deprecated now, and we better make sure that keeps saying
so until we finally remove it.
Suggested by Kevin Willford.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Teach read_directory_recursive() and add_excludes() to
be aware of optional fscache and avoid trying to open()
and fstat() non-existant ".gitignore" files in every
directory in the worktree.
The current code in add_excludes() calls open() and then
fstat() for a ".gitignore" file in each directory present
in the worktree. Change that when fscache is enabled to
call lstat() first and if present, call open().
This seems backwards because both lstat needs to do more
work than fstat. But when fscache is enabled, fscache will
already know if the .gitignore file exists and can completely
avoid the IO calls. This works because of the lstat diversion
to mingw_lstat when fscache is enabled.
This reduced status times on a 350K file enlistment of the
Windows repo on a NVMe SSD by 0.25 seconds.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
It was a bad idea to just remove that option from Git for Windows
v2.15.0, as early users of that (still experimental) option would have
been puzzled what they are supposed to do now.
So let's reintroduce the flag, but make sure to show the user good
advice how to fix this going forward.
We'll remove this option in a more orderly fashion either in v2.16.0 or
in v2.17.0.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
We used to install into $HOME/bin/, which wreaks havoc with installed
versions of Git for Windows (because $HOME/bin is *prepended* to the
PATH, hence would override `git.exe` in Git Bash).
Let's align the MSVC case with the non-MSVC case and install into
/mingw64/bin/ (or /mingw32/bin/ in 32-bit Git for Windows SDKs) instead.
Noticed by Derrick Stolee.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This is an early version of the latest iteration of what used to
be 08f088c809 (Merge branch 'show-ignored-directory', 2017-10-23),
i.e. support for the then-experimental, now-dropped
`--show-ignored-directory` option.
The set of paths output from "git status --ignored" was tied
closely with its "--untracked=<mode>" option, but now it can be
controlled more flexibly. Most notably, a directory that is
ignored because it is listed to be ignored in the ignore/exclude
mechanism can be handled differently from a directory that ends up
to be ignored only because all files in it are ignored.
* jm/status-ignored-files-list:
status: test ignored modes
status: document options to show matching ignored files
status: report matching ignored and normal untracked
status: add option to show ignored files differently
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Add tests around status reporting ignord files that match an exclude
pattern for both --untracked-files=normal and --untracked-files=all.
Signed-off-by: Jameson Miller <jamill@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Teach status command to handle `--ignored=matching` with
`--untracked-files=normal`
Signed-off-by: Jameson Miller <jamill@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Teach the status command more flexibility in how ignored files are
reported. Currently, the reporting of ignored files and untracked
files are linked. You cannot control how ignored files are reported
independently of how untracked files are reported (i.e. `all` vs
`normal`). This makes it impossible to show untracked files with the
`all` option, but show ignored files with the `normal` option.
This work 1) adds the ability to control the reporting of ignored
files independently of untracked files and 2) introduces the concept
of status reporting ignored paths that explicitly match an ignored
pattern. There are 2 benefits to these changes: 1) if a consumer needs
all untracked files but not all ignored files, there is a performance
benefit to not scanning all contents of an ignored directory and 2)
returning ignored files that explicitly match a path allow a consumer
to make more informed decisions about when a status result might be
stale.
This commit implements --ignored=matching with --untracked-files=all.
The following commit will implement --ignored=matching with
--untracked=files=normal.
As an example of where this flexibility could be useful is that our
application (Visual Studio) runs the status command and presents the
output. It shows all untracked files individually (e.g. using the
'--untracked-files==all' option), and would like to know about which
paths are ignored. It uses information about ignored paths to make
decisions about when the status result might have changed.
Additionally, many projects place build output into directories inside
a repository's working directory (e.g. in "bin/" and "obj/"
directories). Normal usage is to explicitly ignore these 2 directory
names in the .gitignore file (rather than or in addition to the *.obj
pattern).If an application could know that these directories are
explicitly ignored, it could infer that all contents are ignored as
well and make better informed decisions about files in these
directories. It could infer that any changes under these paths would
not affect the output of status. Additionally, there can be a
significant performance benefit by avoiding scanning through ignored
directories.
When status is set to report matching ignored files, it has the
following behavior. Ignored files and directories that explicitly
match an exclude pattern are reported. If an ignored directory matches
an exclude pattern, then the path of the directory is returned. If a
directory does not match an exclude pattern, but all of its contents
are ignored, then the contained files are reported instead of the
directory.
Signed-off-by: Jameson Miller <jamill@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A very common assumption in Git's source code base is that
offset_1st_component() returns either 0 for relative paths, or 1 for
absolute paths that start with a slash. In other words, the return value
is either 0 or points just after the dir separator.
This assumption is not fulfilled when calling offset_1st_component()
e.g. on UNC paths on Windows, e.g. "//my-server/my-share". In this case,
offset_1st_component() returns the length of the entire string (which is
correct, because stripping the last "component" would not result in a
valid directory), yet the return value still does not point just after a
dir separator.
This assumption is most prominently seen in the
setup_git_directory_gently_1() function, where we want to append a
".git" component and simply assume that there is already a dir
separator. In the UNC example given above, this assumption is incorrect.
As a consequence, Git will fail to handle a worktree at the top of a UNC
share correctly.
Let's fix this by adding a dir separator specifically for that case: we
found that there is no first component in the path and it does not end
in a dir separator? Then add it.
This fixes https://github.com/git-for-windows/git/issues/1320
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
It was observed that the current implementation of of get_proc_addr()
fails to load the kernel32.dll with code ERROR_INVALID_PARAMETER.
Probably the reason is that kernel32.dll is already loaded. The
behavior was seen at Windows SP1, both 32bit and 64bit. Probably it
would behave same way in some or all other Windows versions.
This breaks all usages of "clone --local", including the automatic
tests where they call it.
The function CreateHardLink is available in all supported Windows
versions (since Windows XP), so there is no more need to resolve it
in runtime.
Signed-off-by: Max Kirillov <max@max630.net>
When running an external diff from, say, a diff tool, it is safe to
assume that we want to write the files in question. On Windows, that
means that there cannot be any other process holding an open handle to
said files.
So let's make sure that `git diff` itself is not holding any open handle
to the files in question.
This fixes https://github.com/git-for-windows/git/issues/1315
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
We have this loop where we try to remove the read-only attribute when
rename() fails and try again. If it fails again, let's not try to remove
the read-only attribute and try *again*.
This fixes https://github.com/git-for-windows/git/issues/1299
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
These changes are necessary to support better Git for Windows' new
auto-update feature.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
"Question?" is maybe not the most informative thing to ask. In the
absence of better information, it is the best we can do, of course.
However, Git for Windows' auto updater just learned the trick to use
git-gui--askyesno to ask the user whether to update now or not. And in
this scripted scenario, we can easily pass a command-line option to
change the window title.
So let's support that with the new `--title <title>` option.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
The text wrapping seems to be aligned to the right side of the Yes
button, leaving an awful lot of empty space.
Let's try to counter this by using pixel units.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
From the documentation of said setting:
This boolean will enable fsync() when writing object files.
This is a total waste of time and effort on a filesystem that
orders data writes properly, but can be useful for filesystems
that do not use journalling (traditional UNIX filesystems) or
that only journal metadata and not file contents (OS X’s HFS+,
or Linux ext3 with "data=writeback").
The most common file system on Windows (NTFS) does not guarantee that
order, therefore a sudden loss of power (or any other event causing an
unclean shutdown) would cause corrupt files (i.e. files filled with
NULs). Therefore we need to change the default.
Note that the documentation makes it sound as if this causes really bad
performance. In reality, writing loose objects is something that is done
only rarely, and only a handful of files at a time.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Add .LIBs for zlib and openssl to <AdditionalDependencies>
to help linker when building with VS2017.
This closes https://github.com/git-for-windows/git/issues/1234
Note: this patch still leaves a couple of TODOs:
- It should be possible to add GEN.DEPS\lib to
<AdditionalLibraryDependencies> and then just set
<AdditionalDependencies> to the library basenames.
- Likewise, you should be able to copy GEN.DEPS\bin\*.dll
to the destination directory rather than using the full
paths in the $afterTargets lines.
(This is in line with items in <AdditionalIncludeDirectories>
referencing GEN.DEPS\include.)
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Git for Windows supports the core.longPaths config setting to allow
writing/reading long paths via the \\?\ trick for a long time now.
However, for that support to work, it is absolutely necessary that
git_default_config() is given a chance to parse the config. Otherwise
Git will be non the wiser.
So let's make sure that as many commands that previously failed to
parse the core.* settings now do that, implicitly enabling long path
support in a lot more places.
Note: this is not a perfect solution, and it cannot be, as there is
a chicken-and-egg problem in reading the config itself...
This fixes https://github.com/git-for-windows/git/issues/1218
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Toolset v120 corresponds to Visual Studio 2013. We already used
dependencies that were hardcoded to v140 (i.e. Visual Studio 2015), so
let's just remove the cruft.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
A ton of Git commands simply do not read (or at least parse) the core.*
settings. This is not good, as Git for Windows relies on the
core.longPaths setting to be read quite early on.
So let's just make sure that all commands read the config and give
platform_core_config() a chance.
This patch teaches tons of Git commands to respect the config setting
`core.longPaths = true`, including `pack-refs`, thereby fixing
https://github.com/git-for-windows/git/issues/1218
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This topic branch teaches Git to accept UNC paths of the form
file://host/share/repository.git.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Teach the top-level git Makefile to use whatever VS compiler
tool chain is installed on the system.
When building git from the command line in a git-sdk BASH
window with MAKE, the shell environment has environment
variables for GCC tools, but not MSVC tools. MSVC bindings
are only avaliable from the various "VcVarsAll.bat" scripts
run by the "Developer Command Prompt" shortcuts.
Add compat/vcbuild/find_vs_env.bat to the Makefile. It
uses the various "VcVarsAll.bat" scripts in a background
Developer Command Prompt process to compute the proper
environment variables and publish them for use by the Makefile.
[jes: fixed typos, used %SystemRoot% instead of C:\WINDOWS]
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Extend the parser to accept file://server/share/repo in the way that
Windows users expect it to be parsed who are used to referring to file
shares by UNC paths of the form \\server\share\folder.
[jes: tightened check to avoid handling file://C:/some/path as a UNC
path.]
This closes https://github.com/git-for-windows/git/issues/1264.
Signed-off-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This topic branch brings slightly experimental changes supporting Git
for Windows to use BusyBox-w32 to execute its shell scripts as well as
its test suite.
The test suite can be run by installing the test artifacts into a MinGit
that has busybox.exe (and using Git for Windows' SDK's Perl for now, as
the test suite requires Perl even when NO_PERL is set, go figure) by
using the `install-mingit-test-artifacts` Makefile target with the
DESTDIR variable pointing to the top-level directory of the MinGit
installation.
To facilitate running the test suite (without having `make` available,
as `make.exe` is not part of MinGit), this branch brings an experimental
patch to the `test-run-command` helper to run Git's test suite. It is
still very experimental, though: in this developer's tests it seemed
that the `poll()` emulation required for `run_parallel_processes()` to
work sometimes hiccups on Windows, causing infinite "hangs". It is also
possible that BusyBox itself has problems writing to the pipes opened by
`test-run-command` (and merging this branch will help investigate
further). Caveat emptor.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
The Makefile target `install-mingit-test-artifacts` simply copies stuff
and things directly into a MinGit directory, including an init.bat
script to set everything up so that the tests can be run in a cmd
window.
Sadly, Git's test suite still relies on a Perl interpreter even if
compiled with NO_PERL=YesPlease. We punt for now, installing a small
script into /usr/bin/perl that hands off to an existing Perl of a Git
for Windows SDK.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Win32 CONDITION_VARIABLE has better performance and is easier to
maintain.
Since CONDITION_VARIABLE is not available in Windows XP and below,
old implementation of pthread_cond_t is kept under define guard
'GIT_WIN_XP_SUPPORT'. To enable old implementation, build with
make CFLAGS="-DGIT_WIN_XP_SUPPORT".
Signed-off-by: Loo Rong Jie <loorongjie@gmail.com>
fast-forwarded.
In the BusyBox-w32 version that is currently under consideration for
MinGit for Windows (to reduce the .zip size, and to avoid problems with
the MSYS2 runtime), the UTF-16 environment present in Windows is
considered to be authoritative, and the 8-bit version is always in UTF-8
encoding.
As a consequence, the ISO-8859-1 test in t9350-fast-export (which tries
to set GIT_AUTHOR_NAME to a ISO-8859-1 encoded value) *must* fail in
that setup.
So let's detect when it would fail (due to an environment being purely
kept UTF-8 encoded), and skip that test in that case.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
On Windows, the current working directory is pretty much guaranteed to
contain a colon. If we feed that path to CVS, it mistakes it for a
separator between host and port, though.
This has not been a problem so far because Git for Windows uses MSYS2's
Bash using a POSIX emulation layer that also pretends that the current
directory is a Unix path (at least as long as we're in a shell script).
However, that is rather limiting, as Git for Windows also explores other
ports of other Unix shells. One of those is BusyBox-w32's ash, which is
a native port (i.e. *not* using any POSIX emulation layer, and certainly
not emulating Unix paths).
So let's just detect if there is a colon in $PWD and punt in that case.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
BusyBox' find implementation does not understand the -ls option, so
let's not use it when we're running inside BusyBox.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Git for Windows uses MSYS2's Bash to run the test suite, which comes
with benefits but also at a heavy price: on the plus side, MSYS2's
POSIX emulation layer allows us to continue pretending that we are on a
Unix system, e.g. use Unix paths instead of Windows ones, yet this is
bought at a rather noticeable performance penalty.
There *are* some more native ports of Unix shells out there, though,
most notably BusyBox-w32's ash. These native ports do not use any POSIX
emulation layer (or at most a *very* thin one, choosing to avoid
features such as fork() that are expensive to emulate on Windows), and
they use native Windows paths (usually with forward slashes instead of
backslashes, which is perfectly legal in almost all use cases).
And here comes the problem: with a $PWD looking like, say,
C:/git-sdk-64/usr/src/git/t/trash directory.t5813-proto-disable-ssh
Git's test scripts get quite a bit confused, as their assumptions have
been shattered. Not only does this path contain a colon (oh no!), it
also does not start with a slash.
This is a problem e.g. when constructing a URL as t5813 does it:
ssh://remote$PWD. Not only is it impossible to separate the "host" from
the path with a $PWD as above, even prefixing $PWD by a slash won't
work, as /C:/git-sdk-64/... is not a valid path.
As a workaround, detect when $PWD does not start with a slash on
Windows, and simply strip the drive prefix, using an obscure feature of
Windows paths: if an absolute Windows path starts with a slash, it is
implicitly prefixed by the drive prefix of the current directory. As we
are talking about the current directory here, anyway, that strategy
works.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
When t5605 tries to verify that files are hardlinked (or that they are
not), it uses the `-links` option of the `find` utility.
BusyBox' implementation does not support that option, and BusyBox-w32's
lstat() does not even report the number of hard links correctly (for
performance reasons).
So let's just switch to a different method that actually works on
Windows.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
