TLDR:

# Make the folder for the kubeconfigs
mkdir -p $HOME/.kube/contexts

# Grab ctx and put it in $PATH 
sudo curl -sSLk https://hireryan.today/wp-content/uploads/2021/11/kubectx -o /usr/local/bin/ctx
sudo chmod 700 /usr/local/bin/ctx
sudo chown $USER /usr/local/bin/ctx


# Add this to your bash or zsh rc
KUBECONFIG=""
BASE_PATH=$HOME/.kube/contexts
for i in `\ls $BASE_PATH`; do
    export KUBECONFIG="$KUBECONFIG:$BASE_PATH/$i"
done

# Or this. This one is made to remove cert data from from both aws and rancher generated configs. Made for mac, should be portable though. 

KUBECONFIG=""
BASE_PATH=$HOME/.kube/contexts
for i in `\ls $BASE_PATH | grep yaml$`; do
    sed -i.bak '/certificate-authority/d' "$BASE_PATH/$i"
    sed -i.bak '/\\$/,/"/g' "$BASE_PATH/$i"
    grep certificate-authority "$BASE_PATH/$i" >/dev/null
    if ! [ $? = 0 ]; then
        grep insecure-skip-tls-verify "$BASE_PATH/$i" >/dev/null
        if ! [ $? = 0 ]; then
            sed -i.bak '/cluster:/s/.*/&\
    insecure-skip-tls-verify: true/' "$BASE_PATH/$i"
        fi
    fi
    export KUBECONFIG="$KUBECONFIG:$BASE_PATH/$i"
    rm -f "$BASE_PATH/$i.bak"
done

# optional - fzf for easy select

brew install fzf

# To install useful key bindings and fuzzy completion:
$(brew --prefix)/opt/fzf/install

I’m pretty sure I stole the core idea of this from someone else’s blog, but something didn’t work, or it was too convoluted.

The last shell based version of kucectx was

https://github.com/ahmetb/kubectx/releases/tag/v0.8.0

Or here as a non zip version:
https://hireryan.today/wp-content/uploads/2021/11/kubens
https://hireryan.today/wp-content/uploads/2021/11/kubectx