kubenv

#!/usr/bin/env bash

kubenv () {
    if [[ -z "$1" ]]; then
        cat <<EOF >/dev/stderr
Usage: kubenv CONTEXT_NAME
EOF
        return 1
    fi

    local -r ctx="$1"
    local -r ctxfile=$(mktemp)
    cat <<EOF >$ctxfile
apiVersion: v1
kind: Config
current-context: ${ctx}
EOF

    if [[ ${KUBECONFIG_SAVED+x} ]]; then
        export KUBECONFIG_SAVED=$KUBECONFIG
    fi
    KUBECONFIG=$KUBECONFIG_SAVED
    if [[ -z "$KUBECONFIG" ]]; then
        KUBECONFIG="${XDG_CACHE_HOME:-$HOME/.kube}/config"
    fi
    KUBECONFIG="$ctxfile:$KUBECONFIG"
    export KUBECONFIG
}