[NEW FEATURE] make git-for-windows supports posix file mode bits in WSL's way #4438
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Thank you for contributing this feature! It is pretty well-written, and I only have one suggestion regarding its form: to separate out the WSL-related file mode functions into their own file.
Having said that, I have a major concern about the design of the feature: it requires calling CreateFileW() for potentially many, many files, and we know for a fact that this API function is quite slow and therefore the impact would be noticeable for monorepo users.
Maybe we can strike a compromise here? I would suggest a new config option that is opt-in, enabling WSL compatibility (which I would probably use myself on a couple of repositories of mine), and leaving the original behavior intact for users who do not need WSL compatibility.
@swigger what do you think?
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This looks already pretty awesome! I offer a couple of recommendations how to polish this PR further. In addition, I would like to ask for two things:
- Please use your real name in the author information and the Signed-off-by: line (it is totally allowed, even encouraged, to use non-ASCII characters there).
- Please rebase the branch onto the latest
main: Git for Windows v2.41.0 was released in the meantime (and this was the reason why I did not have time to review this PR in-depth earlier than today).
In Git for Windows v2.39.0, we fixed a regression where `git.exe` would no longer work in Windows Nano Server (frequently used in Docker containers). This GitHub workflow can be used to verify manually that the Git/Scalar executables work in Nano Server. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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This commit should probably still mention https://devblogs.microsoft.com/commandline/chmod-chown-wsl-improvements/, and I would like to verify for myself that it works with my WSL setup. Sadly, |
I got to test this, and can testify that it works! (You'll need to set It's a bit too late over here to start releasing Git for Windows with this PR today, but I'll do it first thing in the morning tomorrow. |
The Windows Subsystem for Linux (WSL) version 2 allows to use `chmod` on NTFS volumes provided that they are mounted with metadata enabled (see https://devblogs.microsoft.com/commandline/chmod-chown-wsl-improvements/ for details), for example: $ chmod 0755 /mnt/d/test/a.sh In order to facilitate better collaboration between the Windows version of Git and the WSL version of Git, we can make the Windows version of Git also support reading and writing NTFS file modes in a manner compatible with WSL. Since this slightly slows down operations where lots of files are created (such as an initial checkout), this feature is only enabled when `core.WSLCompat` is set to true. Note that you also have to set `core.fileMode=true` in repositories that have been initialized without enabling WSL compatibility. There are several ways to enable metadata loading for NTFS volumes in WSL, one of which is to modify `/etc/wsl.conf` by adding: ``` [automount] enabled = true options = "metadata,umask=027,fmask=117" ``` And reboot WSL. It can also be enabled temporarily by this incantation: $ sudo umount /mnt/c && sudo mount -t drvfs C: /mnt/c -o metadata,uid=1000,gid=1000,umask=22,fmask=111 It's important to note that this modification is compatible with, but does not depend on WSL. The helper functions in this commit can operate independently and functions normally on devices where WSL is not installed or properly configured. Signed-off-by: xungeng li <xungeng@gmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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/git-artifacts The |
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/add release note feature To support interoperability with Windows Subsystem for Linux (WSL) better, it is now possible to let Git set e.g. the executable bits of files (this needs The workflow run was started |
To support interoperability with Windows Subsystem for Linux (WSL) better, it [is now possible to let Git set](git-for-windows/git#4438) e.g. the executable bits of files (this needs `core.WSLCompat` to be set, and [the NTFS volume needs to be mounted in WSL using the appropriate options](https://devblogs.microsoft.com/commandline/chmod-chown-wsl-improvements/)). Signed-off-by: gitforwindowshelper[bot] <gitforwindowshelper-bot@users.noreply.github.com>
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/release The |
Support for wsl mode bits was previously added to git, but there was a bug because the filenames provided by fscache did not contain paths. This commit fixes the issue. The previous feature is added in PR #4438, but at that time I didn't tested so much. Sorry to have this bug. To test this feature, set core.wslcompat to ture and core.filemode to true and make sure repo is on NTFS.
In WSL(2), we can set the mode for an NTFS file, for example:
$ chmod 0755 /mnt/d/test/a.sh
provided that WSL has enabled metadata mounting NTFS volumes.
In order to facilitate better collaboration between the Windows
version of Git and the WSL version of Git, we can make the Windows
version of Git also support reading and writing NTFS file modes
in a manner compatible with WSL.
In this pull request, I've incorporated two commits. The initial commit
introduces two helper functions for reading and writing file mode bits.
The subsequent commit enhances Git with WSL compatibility for
improved collaboration.