tree 8f6918f82c04bfe9e9a230c9ce6a9c344a255b46
parent 91d71f6c2f04d59719a95392fef75b3c4c00d375
author Bryan C. Mills <bcmills@google.com> 1589862789 -0400
committer Bryan C. Mills <bcmills@google.com> 1590095967 +0000

internal/fastwalk: attempt Symlink tests on Windows

Windows does actually support symlinks, but older versions of
Windows only support symlinks when running as an administrator.
Newer versions of Windows support symlinks for all users.

Instead of skipping based on GOOS, first try the Symlink operation.
If it succeeds, we can proceed with the test; otherwise, we can try to
write a regular file to determine whether the problem was the symlink
operation itself or the destination path.

For golang/go#38772

Change-Id: Idaa9592011473de7f514b889859e420a84db6d01
Reviewed-on: https://go-review.googlesource.com/c/tools/+/234537
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>