# Rust

#### install

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





## expand 

```bash
# just for mac 
rustup toolchain install nightly-x86_64-apple-darwin

cargo +nightly install cargo-expand


```

## cargo target

cargo 编译保存地址，不保存到当前目录下，多个cargo包可以共用缓存

```bash

mkdir -p ~/.cache/cargo/
export CARGO_TARGET_DIR="$HOME/.cache/cargo"

# or 
echo "[build]" > .cargo/config
echo "target-dir = \"$HOME/shared_rust_target\"" >> .cargo/config
```