go/doc/next/6-stdlib/99-minor/os/61893.md

On Windows, the mode bits reported by [Lstat] and [Stat] for
reparse points changed. Mount points no longer have [ModeSymlink] set,
and reparse points that are not symlinks, Unix sockets, or dedup files
now always have [ModeIrregular] set.
This behavior is controlled by the `winsymlink` setting.
For Go 1.23, it defaults to `winsymlink=1`.
Previous versions default to `winsymlink=0`.
doc: make use of simpler symbol links for relnotes This is a practical use of CL 577915, follow-up to CL 577835. Change-Id: Ibe7e2fa11b444afa1898dc6f6aba1512fe98f1fe Reviewed-on: https://go-review.googlesource.com/c/go/+/578195 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Jonathan Amsterdam <jba@google.com> Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org> 2024-04-11 22:25:27 +08:00			`On Windows, the mode bits reported by [Lstat] and [Stat] for`
			`reparse points changed. Mount points no longer have [ModeSymlink] set,`
			`and reparse points that are not symlinks, Unix sockets, or dedup files`
			`now always have [ModeIrregular] set.`
os: don't treat mount points as symbolic links This CL changes the behavior of os.Lstat to stop setting the os.ModeSymlink type mode bit for mount points on Windows. As a result, filepath.EvalSymlinks no longer evaluates mount points, which was the cause of many inconsistencies and bugs. Additionally, os.Lstat starts setting the os.ModeIrregular type mode bit for all reparse tags on Windows, except for those that are explicitly supported by the os package, which, since this CL, doesn't include mount points. This helps to identify files that need special handling outside of the os package. This behavior is controlled by the `winsymlink` GODEBUG setting. For Go 1.23, it defaults to `winsymlink=1`. Previous versions default to `winsymlink=0`. Fixes #39786 Fixes #40176 Fixes #61893 Updates #63703 Updates #40180 Updates #63429 Cq-Include-Trybots: luci.golang.try:gotip-windows-amd64-longtest,gotip-windows-arm64 Change-Id: I2e7372ab8862f5062667d30db6958d972bce5407 Reviewed-on: https://go-review.googlesource.com/c/go/+/565136 Reviewed-by: Bryan Mills <bcmills@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> 2024-02-28 16:06:04 +01:00			This behavior is controlled by the `winsymlink` setting.
			For Go 1.23, it defaults to `winsymlink=1`.
			Previous versions default to `winsymlink=0`.