配置 crates.io 镜像 
单独为一个项目配置镜像 
在项目根目录创建 .cargo/config.toml 文件
任选其一配置镜像
- 字节跳动toml
[source.crates-io] replace-with = 'rsproxy-sparse' [source.rsproxy] registry = "https://rsproxy.cn/crates.io-index" [source.rsproxy-sparse] registry = "sparse+https://rsproxy.cn/index/" - 阿里云toml
[source.crates-io] replace-with = "aliyun" [source.aliyun] registry = "https://mirrors.aliyun.com/crates.io-index/" - 中国科学技术大学toml
[source.crates-io] replace-with = "ustc" [source.ustc] registry = "https://mirrors.ustc.edu.cn/crates.io-index" - 华为云toml
[source.crates-io] replace-with = "huaweicloud" [source.huaweicloud] registry = "https://mirrors.huaweicloud.com/repository/git/crates.io-index.git"