RustでHello World

$ docker run -it --rm ubuntu /bin/bash

$ apt update
$ apt install -y curl vim gcc

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

info: downloading installer

Welcome to Rust!

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

Rustup metadata and toolchains will be installed into the Rustup
home directory, located at:

  /root/.rustup

This can be modified with the RUSTUP_HOME environment variable.

The Cargo home directory is located at:

  /root/.cargo

This can be modified with the CARGO_HOME environment variable.

The cargo, rustc, rustup and other commands will be added to
Cargo's bin directory, located at:

  /root/.cargo/bin

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

  /root/.profile
  /root/.bashrc

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

Current installation options:


   default host triple: x86_64-unknown-linux-gnu
     default toolchain: stable (default)
               profile: default
  modify PATH variable: yes

1) Proceed with standard installation (default - just press enter)
2) Customize installation
3) Cancel installation
>

>1

info: profile set to 'default'
info: default host triple is x86_64-unknown-linux-gnu
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
info: latest update on 2024-02-08, rust version 1.76.0 (07dca489a 2024-02-04)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
 14.7 MiB /  14.7 MiB (100 %)  10.0 MiB/s in  1s ETA:  0s
info: downloading component 'rust-std'
 23.9 MiB /  23.9 MiB (100 %)   9.9 MiB/s in  2s ETA:  0s
info: downloading component 'rustc'
 62.3 MiB /  62.3 MiB (100 %)   8.0 MiB/s in  7s ETA:  0s
info: downloading component 'rustfmt'
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-docs'
info: installing component 'rust-std'
 23.9 MiB /  23.9 MiB (100 %)  23.4 MiB/s in  1s ETA:  0s
info: installing component 'rustc'
 62.3 MiB /  62.3 MiB (100 %)  25.6 MiB/s in  2s ETA:  0s
info: installing component 'rustfmt'
info: default toolchain set to 'stable-x86_64-unknown-linux-gnu'

  stable-x86_64-unknown-linux-gnu installed - rustc 1.76.0 (07dca489a 2024-02-04)


Rust is installed now. Great!

To get started you may need to restart your current shell.
This would reload your PATH environment variable to include
Cargo's bin directory ($HOME/.cargo/bin).

To configure your current shell, you need to source
the corresponding env file under $HOME/.cargo.

This is usually done by running one of the following (note the leading DOT):
. "$HOME/.cargo/env"            # For sh/bash/zsh/ash/dash/pdksh
source "$HOME/.cargo/env.fish"  # For fish

$ . "$HOME/.cargo/env"

#!/bin/sh
# rustup shell setup
# affix colons on either side of $PATH to simplify matching
case ":${PATH}:" in
    *:"$HOME/.cargo/bin":*)
        ;;
    *)
        # Prepending path in case a system-installed rustc needs to be overridden
        export PATH="$HOME/.cargo/bin:$PATH"
        ;;
esac

$ which rustc
/root/.cargo/bin/rustc

$ ls /root/.cargo/bin/
cargo         cargo-fmt   clippy-driver  rust-analyzer  rust-gdbgui  rustc    rustfmt
cargo-clippy  cargo-miri  rls            rust-gdb       rust-lldb    rustdoc  rustup

fn main() {
    println!("Hello World!");
}

$ rustc hello.rs

$ ls -lt hello*
-rwxr-xr-x 1 root root 3784344 Mar 13 10:24 hello
-rw-r--r-- 1 root root      44 Mar 13 10:21 hello.rs

$ ./hello
Hello World!

$ rustc --version
rustc 1.76.0 (07dca489a 2024-02-04)

$ rustup toolchain list
stable-x86_64-unknown-linux-gnu (default)

$ rustup toolchain add 1.75

info: syncing channel updates for '1.75-x86_64-unknown-linux-gnu'
info: latest update on 2023-12-28, rust version 1.75.0 (82e1608df 2023-12-21)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
 14.3 MiB /  14.3 MiB (100 %)   9.7 MiB/s in  1s ETA:  0s
info: downloading component 'rust-std'
 23.6 MiB /  23.6 MiB (100 %)   9.1 MiB/s in  2s ETA:  0s
info: downloading component 'rustc'
 61.4 MiB /  61.4 MiB (100 %)   8.8 MiB/s in  7s ETA:  0s
info: downloading component 'rustfmt'
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-docs'
info: installing component 'rust-std'
 23.6 MiB /  23.6 MiB (100 %)  23.3 MiB/s in  1s ETA:  0s
info: installing component 'rustc'
 61.4 MiB /  61.4 MiB (100 %)  25.9 MiB/s in  2s ETA:  0s
info: installing component 'rustfmt'

  1.75-x86_64-unknown-linux-gnu installed - rustc 1.75.0 (82e1608df 2023-12-21)

info: checking for self-update

$ rustup toolchain list
stable-x86_64-unknown-linux-gnu (default)
1.75-x86_64-unknown-linux-gnu

$ rustup default 1.75-x86_64-unknown-linux-gnu
info: using existing install for '1.75-x86_64-unknown-linux-gnu'
info: default toolchain set to '1.75-x86_64-unknown-linux-gnu'

  1.75-x86_64-unknown-linux-gnu unchanged - rustc 1.75.0 (82e1608df 2023-12-21)

$ rustc --version
rustc 1.75.0 (82e1608df 2023-12-21)

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