update-rust-nightly

#!/bin/bash

# Based on:
# https://github.com/zargony/dotfiles/blob/1edf635/bin/update-rust-nightly

set -e

rust_url="https://static.rust-lang.org/dist/rust-nightly-x86_64-apple-darwin.tar.gz"

install_dir="$(brew --cellar)/rust/HEAD"
new_dir="${install_dir}.new"
old_dir="${install_dir}.old"

[[ -d "$new_dir" ]] && rm -rf "$new_dir"
mkdir -p "$new_dir"
curl "$rust_url" | tar -C "$new_dir" --strip-components 1 -zxf -

brew unlink rust
[[ -d "$old_dir" ]] && rm -rf "$old_dir"
[[ -d "$install_dir" ]] && mv "$install_dir" "$old_dir"
mv "$new_dir" "$install_dir"
brew link rust