Linux知识培训哪家好 千锋教你在键盘上弹钢琴

确保系统已经安装了 Rust 编程语言。若还未安装，运行下面命令来安装它。

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

（LCTT 译注：这种直接用 curl 执行远程 shell 脚本是一种非常危险和不成熟的做法。）

安装程序会问你是否默认安装还是自定义安装还是取消安装。我希望默认安装，因此输入1（数字一）。

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:

/home/sk/.cargo/bin

This path will then be added to your PATH environment variable by modifying the

profile files located at:

/home/sk/.profile

/home/sk/.bash_profile

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

 modify PATH variable: yes

1) Proceed with installation (default)

2) Customize installation

3) Cancel installation

1

info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'

223.6 KiB / 223.6 KiB (100 %) 215.1 KiB/s ETA: 0 s

info: latest update on 2018-10-12, rust version 1.21.0 (3b72af97e 2018-10-09)

info: downloading component 'rustc'

 38.5 MiB / 38.5 MiB (100 %) 459.3 KiB/s ETA: 0 s

info: downloading component 'rust-std'

 56.7 MiB / 56.7 MiB (100 %) 220.6 KiB/s ETA: 0 s

info: downloading component 'cargo'

 3.7 MiB / 3.7 MiB (100 %) 173.5 KiB/s ETA: 0 s

info: downloading component 'rust-docs'

 4.1 MiB / 4.1 MiB (100 %) 224.0 KiB/s ETA: 0 s

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 1.21.0 (3b72af97e 2018-10-09)

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

登出然后重启系统来将 cargo 的 bin 目录纳入 PATH变量中。

校验 Rust 是否正确安装：

$ rustc --version

rustc 1.21.0 (3b72af97e 2018-10-09)

太棒了！Rust 成功安装了。是时候构建 piano-rs 应用了。

使用下面命令克隆 Piano-rs 仓库：

git clone https://github.com/ritiek/piano-rs

上面命令会在当前工作目录创建一个名为piano-rs的目录并下载所有内容到其中。进入该目录：

cd piano-rs

末了，运行下面命令来构建 Piano-rs：

cargo build --release

编译过程要花上一阵子。

编译完成后，在piano-rs目录中运行下面命令：

./target/release/piano-rs

这就是我们在终端上的钢琴键盘了！可以开始弹指一些音符了。按下按键可以弹奏相应音符。使用左/右方向键可以在弹奏时调整音频。而，使用上/下方向键以在弹奏时调整音长。

Piano-rs 使用与 multiplayerpiano.com一样的音符和按键。另外，你可以使用这些音符来学习弹指各种流行歌曲。

要查看帮助。输入：

$ ./target/release/piano-rs -h

piano-rs 0.1.0

Ritiek Malhotra <ritiekmalhotra123@gmail.com>

Play piano in the terminal using PC keyboard.

USAGE:

 piano-rs [OPTIONS]

FLAGS:

 -h, --help Prints help information

 -V, --version Prints version information

OPTIONS:

 -c, --color <COLOR> Color of block to generate when a note is played (Default: "red")

 -d, --duration <DURATION> Duration to play each note for, where 0 means till the end of note (Default: 0)

 -s, --sequence <SEQUENCE> Frequency sequence from 0 to 5 to begin with (Default: 2)

我必须承认这是个超级酷的项目。那些手头比较紧却想玩钢琴的同学，很适合使用这款应用。