Offer/apply Shell autocompletion as part of `rustup-init.sh` ?

[vanillajonathan]

When installing, we should detect the user's login shell if possible and then offer to add autocompletion sourcing to their init files. Perhaps this could be done generically in the $CARGO_HOME/env file, but if not, then we may need to do per-shell handling.

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As an 'agile' story this might be:

• As a users of rustup
• When I freshly install Rust
• I would like to have shell autocompletion so that when I type "rustup c" and press Tab then it expands that to "rustup check".

[kinnison]

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

[vanillajonathan]

Thanks, but I feel like this should have just have worked without me having to find out how enable it manually myself.

I think it should have done this for me when I went to https://www.rust-lang.org/learn/get-started and installed it with:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

[kinnison]

I shall rework this issue to that effect.