rustup is not available after 'brew install rustup-init' on Appls Silicon

[kuncevic]

Problem

Description:

When installing rustup via Homebrew on an Apple Silicon Mac, the main rustup binary is not being installed in /opt/homebrew/bin.

Expected behavior:

The rustup installation should place the main rustup binary in /opt/homebrew/bin.

Steps

Steps to reproduce:

1. Install Rust via Homebrew

brew install rust

2. Install rustup

brew install rustup-init

3. Check for rustup binary

ls /opt/homebrew/bin

The rustup binary is not present, only the rustup-init executable.

Possible Solution(s)

No response

Notes

No response

Rustup version

rustup-init version: 

1.26.0

Installed toolchains

Environment:
-
    OS: macOS Ventura 13..4.1 (Apple Silicon)
    Install method: Homebrew

[rami3l]

@kuncevic Hi! You are on the right path so far! Please try to run rustup-init once to set everything up.

TLDR (originally from #3426 (comment)):

My personal recommendation for setting up a rust environment on macOS would be:

1. Install rustup-init with brew install rustup-init;
2. Proceed with that rustup-init installation;
3. If you also wish to have brew-installed rust, make sure your rustup-installed rust comes first in the PATH, and optionally configure the system toolchain via rustup toolchain link system <path>.

Here's what a correctly-configured brew-managed rustup installation should look like:

> ls -lah $(which rustup)
... ~/.cargo/bin/rustup -> /opt/homebrew/bin/rustup-init

You can see that after running rustup-init and putting ~/.cargo/bin in your $PATH, you have a rustup link that points to your homebrew rustup-init installation.

In fact, rustup-init is rustup, but with a different file name:

rustup/src/bin/rustup-init.rs

Lines 1 to 12 in a4dd7d0

	//! The main Rustup command-line interface
	//!
	//! The rustup binary is a chimera, changing its behavior based on the
	//! name of the binary. This is used most prominently to enable
	//! Rustup's tool 'proxies' - that is, rustup itself and the rustup
	//! proxies are the same binary: when the binary is called 'rustup' or
	//! 'rustup.exe' it offers the Rustup command-line interface, and
	//! when it is called 'rustc' it behaves as a proxy to 'rustc'.
	//!
	//! This scheme is further used to distinguish the Rustup installer,
	//! called 'rustup-init', which is again just the rustup binary under a
	//! different name.

[kuncevic]

Right I c, I believe there is a bit of gap in documentation. Initially I've read desc onhttps://formulae.brew.sh/formula/rustup-init saying that Also known as: rustup however that was confusing...

All fixed through by brew uninstall rust, brew unlink rust, brew install rustup-init and then, as I am using fish shell, this #478 (comment).

Thank you for following up @rami3l

[rami3l]

@kuncevic Glad to hear that! Please feel free to follow up doc issues in #3460 :)

BTW could you please close this issue as resolved? Sadly I don't currently have the permission to do so. Many thanks!