Automatically version switch using fnm

Recent, I've been interested in Rust. While leaning, I have also converted some of using tools to rust builds.

I was using nvm to manage my node version. However, I found fnm,and it's built by Rust.

After using fnm for a while, I realized that fnm doesn't seem to support automatic switching of node versions, so I wrote a script to support it.

shell

#!/bin/bash
version=""
current=`pwd`

if [ -f ${current}"/.nvmrc" ];then
version=`cat ${current}"/.nvmrc"`;
else
len=${#current}

target=("use/node/16" "use/node/18")
node_version=("16" "18")

for idx in ${!target[@]};
do
path=${target[$idx]}
sub=${current#*$path}
sub_len=${#sub}
if [ $len != $sub_len ];then
version=${node_version[$idx]}
break
fi
done
fi

if [ version !== "" ];then
exec=`fnm use ${version}`
fi