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Since183ea3ea(Merge branch 'ps/mingw-rename', 2024-11-13), a new technique is used on Windows to rename files, where supported. The first step of this technique is to open the file with `CreateFileW`. At that time, `FILE_ATTRIBUTE_NORMAL` was passed as the value of the `dwFlagsAndAttributes` argument. Inb30404df[2], this was improved by passing `FILE_FLAG_BACKUP_SEMANTICS`, to support directories as well as regular files. However, neither value of `dwFlagsAndAttributes` is sufficient to open a symbolic link with the correct semantics to rename it. Symlinks on Windows are reparse points. Attempting to open a reparse point with `CreateFileW` dereferences the reparse point and opens the target instead, unless `FILE_FLAG_OPEN_REPARSE_POINT` is included in `dwFlagsAndAttributes`. This is documented for that flag and in the "Symbolic Link Behavior" section of the `CreateFileW` docs [3]. This produces a regression where attempting to rename a symlink on Windows renames its target to the intended new name and location of the symlink. For example, if `symlink` points to `file`, then running git mv symlink symlink-renamed leaves `symlink` in place and unchanged, but renames `file` to `symlink-renamed` [4]. This regression is detectable by existing tests in `t7001-mv.sh`, but the tests must be run by a Windows user with the ability to create symlinks, and the `ln -s` command used to create the initial symlink must also be able to create a real symlink (such as by setting the `MSYS` environment variable to `winsymlinks:nativestrict`). Then these two tests fail if the regression is present, and pass otherwise: 38 - git mv should overwrite file with a symlink 39 - check moved symlink Let's fix this, so that renaming a symlink again renames the symlink itself and leaves the target unchanged, by passing FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT as the `dwFlagsAndAttributes` argument. This is sufficient (and safe) because including `FILE_FLAG_OPEN_REPARSE_POINT` causes no harm even when used to open a file or directory that is not a reparse point. In that case, as noted in [3], this flag is simply ignored. [1]:183ea3eabf[2]:b30404dfc0[3]: https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfilew [4]: https://github.com/git-for-windows/git/issues/5436 Signed-off-by: Eliah Kagan <eliah.kagan@gmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Git - fast, scalable, distributed revision control system
Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.
Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.
Please read the file INSTALL for installation instructions.
Many Git online resources are accessible from https://git-scm.com/ including full documentation and Git related tools.
See Documentation/gittutorial.txt to get started, then see
Documentation/giteveryday.txt for a useful minimum set of commands, and
Documentation/git-<commandname>.txt for documentation of each command.
If git has been correctly installed, then the tutorial can also be
read with man gittutorial or git help tutorial, and the
documentation of each command with man git-<commandname> or git help <commandname>.
CVS users may also want to read Documentation/gitcvs-migration.txt
(man gitcvs-migration or git help cvs-migration if git is
installed).
The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org (read Documentation/SubmittingPatches for instructions on patch submission and Documentation/CodingGuidelines).
Those wishing to help with error message, usage and informational message
string translations (localization l10) should see po/README.md
(a po file is a Portable Object file that holds the translations).
To subscribe to the list, send an email to git+subscribe@vger.kernel.org (see https://subspace.kernel.org/subscribing.html for details). The mailing list archives are available at https://lore.kernel.org/git/, https://marc.info/?l=git and other archival sites.
Issues which are security relevant should be disclosed privately to the Git Security mailing list git-security@googlegroups.com.
The maintainer frequently sends the "What's cooking" reports that list the current status of various development topics to the mailing list. The discussion following them give a good reference for project status, development direction and remaining tasks.
The name "git" was given by Linus Torvalds when he wrote the very first version. He described the tool as "the stupid content tracker" and the name as (depending on your mood):
- random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant.
- stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
- "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
- "goddamn idiotic truckload of sh*t": when it breaks