Add rename to std.fs API

- Moves fs.rename functions to fs.renameAbsolute to match other functions outside of fs.Dir
- Adds fs.Dir.rename that takes two paths relative to the given Dir
- Adds fs.rename that takes two separate Dir's that the given paths are relative to (for renaming across directories without having to make the second path relative to a single directory)
- Fixes FileNotFound error return in std.os.windows.MoveFileExW
- Returns error.RenameAcrossMountPoints from renameatW
  + Matches the RenameAcrossMountPoints error return in renameatWasi/renameatZ

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/std/os.zig b/lib/std/os.zig
index bdc746419a..7fc63d7853 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -1890,7 +1890,7 @@ pub fn unlinkatW(dirfd: fd_t, sub_path_w: []const u16, flags: u32) UnlinkatError
     return windows.DeleteFile(sub_path_w, .{ .dir = dirfd, .remove_dir = remove_dir });
 }
 
-const RenameError = error{
+pub const RenameError = error{
     /// In WASI, this error may occur when the file descriptor does
     /// not hold the required rights to rename a resource by path relative to it.
     AccessDenied,
@@ -2107,6 +2107,7 @@ pub fn renameatW(
         .ACCESS_DENIED => return error.AccessDenied,
         .OBJECT_NAME_NOT_FOUND => return error.FileNotFound,
         .OBJECT_PATH_NOT_FOUND => return error.FileNotFound,
+        .NOT_SAME_DEVICE => error.RenameAcrossMountPoints,
         else => return windows.unexpectedStatus(rc),
     }
 }