rustup doc bad path separator on windows

[gfries]

Problem

Windows 10
Version 21H2 Build (19044.2006)

rustup 1.25.1 (bb60b1e 2022-07-12)

The path to the file index.html is build by concatenating the folder and "index.html".
On Windows "/" instead of "" is used.

Steps

1. rustup doc --book
2. firefox fails to open D:\Rust\toolchains\stable-x86_64-pc-windows-msvc\share\doc\rust\html\book/index.html
3. Should be D:\Rust\toolchains\stable-x86_64-pc-windows-msvc\share\doc\rust\html\book\index.html

Possible Solution(s)

No response

Notes

No response

Rustup version

rustup 1.25.1 (bb60b1e89 2022-07-12)

Installed toolchains

Default host: x86_64-pc-windows-msvc
rustup home:  D:\Rust

installed toolchains
--------------------

stable-x86_64-pc-windows-gnu
stable-x86_64-pc-windows-msvc

installed targets for active toolchain
--------------------------------------

wasm32-unknown-unknown
x86_64-pc-windows-msvc

active toolchain
----------------

stable-x86_64-pc-windows-msvc (default)
rustc 1.64.0 (a55dd71d5 2022-09-19)

[gfries]

Problem description:
[Fix] On Windows "/" instead of "\" is used.

[0xPoe]

I think this because we store the path here.

rustup/src/cli/rustup_mode.rs

Line 1509 in e40ca12

("book", "The Rust Programming Language book", "book/index.html"),

And we use it here

rustup/src/toolchain.rs

Line 214 in e40ca12

doc_dir.push(relative);

.