Daniel Silverstone

A read-only rustup installation is not something rustup expects to deal with. You could be careful to not run anything which could cause writes to the installation (e.g. nothing which...

> I wonder in [Nix](https://nixos.org/) package manager could be of any help for a multi-user setup. Just a thought. It's a nice idea, but sadly this requires system level support...

Hi @vanillajonathan There's already this kind of functionality - see: https://rust-lang.github.io/rustup/installation/index.html#enable-tab-completion-for-bash-fish-zsh-or-powershell

I shall rework this issue to that effect.

I would not object to a serialisation implementation, but I've never been quite sure what the best approach would be. For example, attempting to maintain the marks during serialisation might...

As for serialising `MarkedNode` etc. I guess that would have to happen only if you think that's appropriate for round-tripping -- I'd be content with an expectation that people would...

This is expected behaviour, rustup does not deduplicate toolchain installations because you could potentially encounter confusing behaviour if it did. Consider if it worked the way you suggest it should:...

In theory doing that for stable/numbered toolchains would be possible, however extending it to beta/nightly would be near impossible to do reliably since the channel names and the compiler versions...

@comicfans The full story around verifying the security of the files `rustup` downloads has yet to be completed. For now, we rely on the SSL certificates authenticating the `RUSTUP_DIST_SERVER` and...

Yes, you have to trust the dist server currently.