go-mode
go env -w GOPROXY=https://goproxy.io,direct
go get golang.org/x/tools/gopls@latest
shell-mode
npm --registry https://registry.npm.taobao.org i -g bash-language-server
rust-mode
emacs ~/.bashrc
export RUST_SRC_PATH=/home/alex/software/rustc-1.34.2-src/src