前回のエントリでは横着してbrew install rustとしたけど、それだといろいろ無いっぽいので、toolchain一式入るように入れ直す。

まずはお掃除

% brew uninstall rust

無いことを確認。

% which rustc
% which cargo

公式ドキュメントに従ってインストール

www.rust-lang.org

% curl https://sh.rustup.rs -sSf | sh

以下、その出力全文

info: downloading installer

Welcome to Rust!

This will download and install the official compiler for the Rust programming
language, and its package manager, Cargo.

It will add the cargo, rustc, rustup and other commands to Cargo's bin
directory, located at:

  /Users/otiai10/.cargo/bin

This path will then be added to your PATH environment variable by modifying the
profile files located at:

  /Users/otiai10/.profile
  /Users/otiai10/.zprofile

You can uninstall at any time with rustup self uninstall and these changes will
be reverted.

Current installation options:

   default host triple: x86_64-apple-darwin
     default toolchain: stable
  modify PATH variable: yes

1) Proceed with installation (default)
2) Customize installation
3) Cancel installation
1

info: syncing channel updates for 'stable-x86_64-apple-darwin'
info: latest update on 2018-02-15, rust version 1.24.0 (4d90ac38c 2018-02-12)
info: downloading component 'rustc'
 38.5 MiB /  38.5 MiB (100 %)  27.1 MiB/s ETA:   0 s
info: downloading component 'rust-std'
 54.6 MiB /  54.6 MiB (100 %)  29.1 MiB/s ETA:   0 s
info: downloading component 'cargo'
info: downloading component 'rust-docs'
info: installing component 'rustc'
info: installing component 'rust-std'
info: installing component 'cargo'
info: installing component 'rust-docs'
info: default toolchain set to 'stable'

  stable installed - rustc 1.24.0 (4d90ac38c 2018-02-12)


Rust is installed now. Great!

To get started you need Cargo's bin directory ($HOME/.cargo/bin) in your PATH
environment variable. Next time you log in this will be done automatically.

To configure your current shell run source $HOME/.cargo/env

ということで、言われたとおり、$HOME/.cargo/binをPATHに追加する。

% ls $HOME/.cargo/bin
cargo     cargo-fmt rls       rust-gdb  rust-lldb rustc     rustdoc   rustfmt   rustup
% echo 'export PATH=${HOME}/.cargo/bin:${PATH}' >> ~/.zshrc
% source ~/.zshrc
% which rustc
/Users/otiai10/.cargo/bin/rustc
% rustc --version
rustc 1.24.0 (4d90ac38c 2018-02-12)

いいですね。

cargo new してみる

% cd ~/proj/rust
% cargo new --help
% cargo new --bin
% cd hello
% cargo run
   Compiling hello v0.1.0 (file:///Users/otiai10/proj/rust/hello)
    Finished dev [unoptimized + debuginfo] target(s) in 0.39 secs
     Running `target/debug/hello`
Hello, world!
%

いい感じに、前回記事の状態を再現できた。

DRY

以下追記 2018/02/27

error: toolchain 'beta-x86_64-apple-darwin' does not have the binary `rustfmt`

rustfmtが動かんかったので

% rustfmt --version
error: toolchain 'beta-x86_64-apple-darwin' does not have the binary `rustfmt`
% rustup update
# ↓ toolchain install は要りません。
# rustup toolchain install stable-x86_64-apple-darwin
% rustup component add rustfmt-preview
% rustfmt --version
0.3.8-nightly (346238f 2018-02-04)

はい。