Book: rustup.sh -> rustup.rs

[steveklabnik]

Fixes #35653

cc rust-lang/prev.rust-lang.org#621

[rust-highfive]

@steveklabnik: no appropriate reviewer found, use r? to override

[retep998]

This only covers installing rustup from a bash terminal. It doesn't cover installing rustup from either powershell or cmd. Granted, cmd doesn't really have a way to download files, but powershell totally does: Invoke-WebRequest. At the very least there should still be a section describing how to download and install the rustup.rs installer on Windows.

[steveklabnik]

@retep998 do you have the time to give me some phrasing of how you'd like it to appear? My only experience has been with bash.

also, cc @carols10cents on this, as we should sync that with the new book too

[retep998]

cc @brson

[carols10cents]

@steveklabnik The new book is already using rustup.rs. For windows, I just said "go to rustup.rs and follow the instructions".

[steveklabnik]

Yeah, I was thinking of the Windows changes that happen.

[ollie27]

Might it be better to actually include less information in the book and basically just link to https://www.rust-lang.org/install.html so there is a single source of truth?

[steveklabnik]

@ollie27 This text is included in the offline documentation, and the website isn't. So I still like having it in the book. Most books have text in them about installing things, even if there's a site.

[Mark-Simulacrum]

Is this now true? https://users.rust-lang.org/t/psa-rust-documentation-is-now-optional-and-opt-in-when-installing-via-rustup/8072/2

[steveklabnik]

Let's see if that behavior actually survives; seems fairly controversial.

[brson]

Looks good.

I agree it should say something about windows.

One option is telling them to navigate to https://www.rust-lang.org/install.html is probably best. You might present it like "Installing Rust is really simple. The instructions are on the Rust website (link), but if you are on Linux and Mac you can just type:"

It might also be worthwhile to present the download link directly in the text.

I guess for now I'd suggest keeping the two sections, one for Linux/Mac and one for Windows. In the windows section link directly to htts://win.rustup.rs saying like "On Windows download and run rustup-init.exe", linking to it.

I do think a link to install.html is warranted still since there's more to learn there. "For other installation options, see the install page on the Rust website". etc.

I'll also try to get a powershell one-liner working. If we had that we might present the curl instructions, the powershell instructions, and then "for other installation methods see the website".

[brson]

Closing in favor of #38122