Rust Crates 镜像设置教程:
window下c盘,用户目录下,找到.cargo进入到当前目录,一般目录中是没有config文件的,创建一个config文件不需要后缀,然后写
[source.crates-io]
registry = "https://github.com/rust-lang/crates.io-index"
replace-with = 'ustc'
[source.ustc]
registry = "git://mirrors.ustc.edu.cn/crates.io-index"