Add a macro to mark code sections that only read from the file system,
along with a config option and documentation.
This facilitates implementation of relatively simple file system level
caches without the need to synchronize with the file system.
Enable read-only sections for 'git status' and preload_index.
Signed-off-by: Karsten Blees <blees@dcon.de>
Emulating the POSIX lstat API on Windows via GetFileAttributes[Ex] is quite
slow. Windows operating system APIs seem to be much better at scanning the
status of entire directories than checking single files. A caching
implementation may improve performance by bulk-reading entire directories
or reusing data obtained via opendir / readdir.
Make the lstat implementation pluggable so that it can be switched at
runtime, e.g. based on a config option.
Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Emulating the POSIX `dirent` API on Windows via
`FindFirstFile()`/`FindNextFile()` is pretty staightforward, however,
most of the information provided in the `WIN32_FIND_DATA` structure is
thrown away in the process. A more sophisticated implementation may
cache this data, e.g. for later reuse in calls to `lstat()`.
Make the `dirent` implementation pluggable so that it can be switched at
runtime, e.g. based on a config option.
Define a base DIR structure with pointers to `readdir()`/`closedir()`
that match the `opendir()` implementation (similar to vtable pointers in
Object-Oriented Programming). Define `readdir()`/`closedir()` so that
they call the function pointers in the `DIR` structure. This allows to
choose the `opendir()` implementation on a call-by-call basis.
Make the fixed-size `dirent.d_name` buffer a flex array, as `d_name` may
be implementation specific (e.g. a caching implementation may allocate a
`struct dirent` with _just_ the size needed to hold the `d_name` in
question).
Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
We will use them in the upcoming "FSCache" patches (to accelerate
sequential lstat() calls).
Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This is the branch thicket of patches in Git for Windows that are
considered ready for upstream. To keep them in a ready-to-submit shape,
they are kept as close to the beginning of the branch thicket as
possible.
There has been a slow but steady stream of bug reports triggered by the
warning included in ac33519ddfa818f420b4ef5a09b4a7b3ac8adeb8. Since
introducing the escape hatch for Windows 7 in that same patch, however,
I have not seen a single report that pointed to the kind of bug I
anticipated when writing that warning message.
Let's drop this warning, as well as the escape hatch: Git for Windows
dropped supporting Windows 7 (and Windows 8) directly after Git for
Windows v2.46.2. For full details, see
https://gitforwindows.org/requirements#windows-version.
For good measure, let's keep the fall-back, though: It sometimes helps
work around issues (e.g. when Defender still holds a handle on a file
that Git wants to write out).
In ac33519ddfa8 (mingw: restrict file handle inheritance only on Windows
7 and later, 2019-11-22), I introduced code to safe-guard the
defense-in-depth handling that restricts handles' inheritance so that it
would work with Windows 7, too.
Let's revert this patch: Git for Windows dropped supporting Windows 7 (and
Windows 8) directly after Git for Windows v2.46.2. For full details, see
https://gitforwindows.org/requirements#windows-version.
Actually, on second thought: revert only the part that makes this handle
inheritance restriction logic optional and that suggests to open a bug
report if it fails, but keep the fall-back to try again without said
logic: There have been a few false positives over the past few years
(where the warning was triggered e.g. because Defender was still
accessing a file that Git wanted to overwrite), and the fall-back logic
seems to have helped occasionally in such situations.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This introduces `git survey` to Git for Windows ahead of upstream for
the express purpose of getting the path-based analysis in the hands of
more folks.
The inspiration of this builtin is
[`git-sizer`](https://github.com/github/git-sizer), but since that
command relies on `git cat-file --batch` to get the contents of objects,
it has limits to how much information it can provide.
This is mostly a rewrite of the `git survey` builtin that was introduced
into the `microsoft/git` fork in microsoft/git#667. That version had a
lot more bells and whistles, including an analysis much closer to what
`git-sizer` provides.
The biggest difference in this version is that this one is focused on
using the path-walk API in order to visit batches of objects based on a
common path. This allows identifying, for instance, the path that is
contributing the most to the on-disk size across all versions at that
path.
For example, here are the top ten paths contributing to my local Git
repository (which includes `microsoft/git` and `gitster/git`):
```
TOP FILES BY DISK SIZE
============================================================================
Path | Count | Disk Size | Inflated Size
-----------------------------------------+-------+-----------+--------------
whats-cooking.txt | 1373 | 11637459 | 37226854
t/helper/test-gvfs-protocol | 2 | 6847105 | 17233072
git-rebase--helper | 1 | 6027849 | 15269664
compat/mingw.c | 6111 | 5194453 | 463466970
t/helper/test-parse-options | 1 | 3420385 | 8807968
t/helper/test-pkt-line | 1 | 3408661 | 8778960
t/helper/test-dump-untracked-cache | 1 | 3408645 | 8780816
t/helper/test-dump-fsmonitor | 1 | 3406639 | 8776656
po/vi.po | 104 | 1376337 | 51441603
po/de.po | 210 | 1360112 | 71198603
```
This kind of analysis has been helpful in identifying the reasons for
growth in a few internal monorepos. Those findings motivated the changes
in #5157 and #5171.
With this early version in Git for Windows, we can expand the reach of
the experimental tool in advance of it being contributed to the upstream
project.
Unfortunately, this will mean that in the next `microsoft/git` rebase,
Jeff Hostetler's version will need to be pulled out since there are
enough conflicts. These conflicts include how tables are stored and
generated, as the version in this PR is slightly more general to allow
for different kinds of data.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This is a follow up to #5157 as well as motivated by the RFC in
gitgitgadget/git#1786.
We have ways of walking all objects, but it is focused on visiting a
single commit and then expanding the new trees and blobs reachable from
that commit that have not been visited yet. This means that objects
arrive without any locality based on their path.
Add a new "path walk API" that focuses on walking objects in batches
according to their type and path. This will walk all annotated tags, all
commits, all root trees, and then start a depth-first search among all
paths in the repo to collect trees and blobs in batches.
The most important application for this is being fast-tracked to Git for
Windows: `git pack-objects --path-walk`. This application of the path
walk API discovers the objects to pack via this batched walk, and
automatically groups objects that appear at a common path so they can be
checked for delta comparisons.
This use completely avoids any name-hash collisions (even the collisions
that sometimes occur with the new `--full-name-hash` option) and can be
much faster to compute since the first pass of delta calculations does
not waste time on objects that are unlikely to be diffable.
Some statistics are available in the commit messages.
This is an updated version of gitgitgadget/git#1785, intended for early
consumption into Git for Windows.
The idea here is to add a new `--full-name-hash` option to `git
pack-objects` and `git repack`. This adjusts the name-hash value used
for finding delta bases in such a way that uses the full path name with
a lower likelihood of collisions than the default name-hash algorithm.
In many repositories with name-hash collisions and many versions of
those paths, this can significantly reduce the size of a full repack. It
can also help in certain cases of `git push`, but only if the pack is
already artificially inflated by name-hash collisions; cases that find
"sibling" deltas as better choices become worse with `--full-name-hash`.
Thus, this option is currently recommended for full repacks of large
repos, and on client machines without reachability bitmaps.
Some care is taken to ignore this option when using bitmaps, either
writing bitmaps or using a bitmap walk during reads. The bitmap file
format contains name-hash values, but no way to indicate which function
is used, so compatibility is a concern for bitmaps. Future work could
explore this idea.
After this PR is merged, then the more-involved `--path-walk` option may
be considered.
Since Git LFS v3.5.x implicitly dropped Windows 7 support, we now want
users to be advised _what_ is going wrong on that Windows version. This
topic branch goes out of its way to provide users with such guidance.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This topic branch adds support for a more Windows-native user-wide
config file than `XDG_CONFIG_HOME` (or `~/.config/`) will ever be.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This topic branch contains a patch that made it into Git for Windows
v2.45.1 but not into Git v2.45.1 (because the latter does not come with
symlink support on Windows).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Another (hopefully clean) PR for showing the error warning about atomic
append on windows after failure on APFS, which returns EBADF not EINVAL.
Signed-off-by: David Lomas <dl3@pale-eds.co.uk>
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
This patch adds a GitHub workflow (to be triggered manually) to allow
for conveniently verifying that Git and Scalar still work as intended in
Windows Nano Server (a relatively small container base image that is
frequently used where a "small Windows" is needed, e.g. in automation
;-))
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
As per
https://github.com/git-for-windows/git/issues/4350#issuecomment-1485041503,
the major block for upgrading Git for Windows' OpenSSL from v1.1 to v3
is the tricky part where such an upgrade would break `git fetch`/`git
clone` and `git push` because the libcurl depends on the OpenSSL DLL,
and the major version bump will _change_ the file name of said DLL.
To overcome that, the plan is to build libcurl flavors for each
supported SSL/TLS backend, aligning with the way MSYS2 builds libcurl,
then switch Git for Windows' SDK to the Secure Channel-flavored libcurl,
and teach Git to look for the specific flavor of libcurl corresponding
to the `http.sslBackend` setting (if that was configured).
Here is the PR to teach Git that trick.
This is a companion PR of https://github.com/prati0100/git-gui/pull/95
Since Git v2.39.1, we are a bit more stringent in searching the PATH. In
particular, we specifically require the `.exe` suffix.
However, the `Repository>Explore Working Copy` command asks for
`explorer.exe` to be found on the `PATH`, which _already_ has that
suffix.
Let's unstartle the PATH-finding logic about this scenario.
This fixes https://github.com/git-for-windows/git/issues/4356
It is merely a historical wart that, say, `git-commit` exists in the
`libexec/git-core/` directory, a tribute to the original idea to let Git
be essentially a bunch of Unix shell scripts revolving around very few
"plumbing" (AKA low-level) commands.
Git has evolved a lot from there. These days, most of Git's
functionality is contained within the `git` executable, in the form of
"built-in" commands.
To accommodate for scripts that use the "dashed" form of Git commands,
even today, Git provides hard-links that make the `git` executable
available as, say, `git-commit`, just in case that an old script has not
been updated to invoke `git commit`.
Those hard-links do not come cheap: they take about half a minute for
every build of Git on Windows, they are mistaken for taking up huge
amounts of space by some Windows Explorer versions that do not
understand hard-links, and therefore many a "bug" report had to be
addressed.
The "dashed form" has been officially deprecated in Git version 1.5.4,
which was released on February 2nd, 2008, i.e. a very long time ago.
This deprecation was never finalized by skipping these hard-links, but
we can start the process now, in Git for Windows.
This addresses the concern raised in
https://github.com/git-for-windows/git/pull/4185#discussion_r1051661894
It is checked for w.r.t. global repository struct down in the callstack
in compatibility layer for MinGW before being assigned in the function
that `free()`'d it.
**This requires an ARM64-machine with Windows 11 installed (which
supports x64 emulation for MSYS2)**
### The main idea
- Use the main MSYS2/git-sdk-64 setup, which works on Windows 11 on ARM
thanks to x64-emulation
- Configure the official `clangarm64` MSYS2 repo
- Install `mingw-w64-clang-aarch64-toolchain` which contains the
ARM64-native Clang compiler
Add `FileVersion`, which is a required string ([Microsoft
documentation](https://learn.microsoft.com/en-us/windows/win32/menurc/versioninfo-resource))
in the `StringFileInfo` block.
As not all required strings were present in the block, none were being
included.
Fixes#4090
After including the `FileVersion` string, all other defined strings are
now being included on executables.
File version information for `git.exe` has changed from:
```
PS C:\Program Files\Git\bin> [System.Diagnostics.FileVersionInfo]::GetVersionInfo("C:\Data\git-sdk-64\usr\src\git\git.exe") | Select-Object *
FileVersionRaw : 2.38.1.1
ProductVersionRaw : 2.38.1.1
Comments :
CompanyName :
FileBuildPart : 1
FileDescription :
FileMajorPart : 2
FileMinorPart : 38
FileName : C:\Data\git-sdk-64\usr\src\git\git.exe
FilePrivatePart : 1
FileVersion :
InternalName :
IsDebug : False
IsPatched : False
IsPrivateBuild : False
IsPreRelease : False
IsSpecialBuild : False
Language : English (United States)
LegalCopyright :
LegalTrademarks :
OriginalFilename :
PrivateBuild :
ProductBuildPart : 1
ProductMajorPart : 2
ProductMinorPart : 38
ProductName :
ProductPrivatePart : 1
ProductVersion :
SpecialBuild :
```
To the following:
```
PS C:\Program Files\Git\bin> [System.Diagnostics.FileVersionInfo]::GetVersionInfo("C:\Data\git-sdk-64\usr\src\git\git.exe") | Select-Object *
FileVersionRaw : 2.38.1.1
ProductVersionRaw : 2.38.1.1
Comments :
CompanyName : The Git Development Community
FileBuildPart : 1
FileDescription : Git for Windows
FileMajorPart : 2
FileMinorPart : 38
FileName : C:\Data\git-sdk-64\usr\src\git\git.exe
FilePrivatePart : 1
FileVersion : 2.38.1.windows.1.10.g6ed65a6fab
InternalName : git
IsDebug : False
IsPatched : False
IsPrivateBuild : False
IsPreRelease : False
IsSpecialBuild : False
Language : English (United States)
LegalCopyright :
LegalTrademarks :
OriginalFilename : git.exe
PrivateBuild :
ProductBuildPart : 1
ProductMajorPart : 2
ProductMinorPart : 38
ProductName : Git
ProductPrivatePart : 1
ProductVersion : 2.38.1.windows.1.10.g6ed65a6fab
SpecialBuild :
```
I wasn't really expecting `GIT_VERSION` to contain the Git commit, I was
hoping for just `2.38.1` or `2.38.1.1`, at least for the `FileVersion`
string.
Anybody know if it's possible to concatenate the `MAJOR`, `MINOR`,
`MICRO`, and `PATCHLEVEL` fields with dots, or if there's another
variable that can be used (with or without `PATCHLEVEL`)?
Alternatively, use the complete `GIT_VERSION` for both `FileVersion` and
`ProductVersion`.
The first three commits are rebased versions of those in gitgitgadget/git#1215. These allow the following:
1. Fix `git config --global foo.bar <path>` from allowing the `<path>`. As a bonus, users with a config value starting with `/` will not get a warning about "old-style" paths needing a "`%(prefix)/`".
2. When in WSL, the path starts with `/` so it needs to be interpolated properly. Update the warning to include `%(prefix)/` to get the right value for WSL users. (This is specifically for using Git for Windows from Git Bash, but in a WSL directory.)
3. When using WSL, the ownership check fails and reports an error message. This is noisy, and happens even if the user has marked the path with `safe.directory`. Remove that error message.
Even if CMake is not the canonical way to build Git for Windows, but
CMake support merely exists in Git to support building Git for Windows
using Visual Studio, we should include `headless-git` in such a scenario
when installing the binaries to a given location.
This merges the current version of the patch that tries to address Git
GUI's problems with intent-to-add files.
This patch will likely be improved substantially before it is merged
into Git GUI's main branch, but we want to have _something_ resembling a
fix already in Git for Windows v2.29.0.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
