Select kubectl context based on regular expression matching

kube-context.bash

# alias k for kubectl
# usage: k KUBECTL_ARGS...
function k () {
    kubectl "$@"
}

# print or switch kubectl kubeconfig contexts
# usage: kc [MATCH_REGEXP]
function kc ()
{
    local context=$1
    if [[ ! -n $context ]]; then
        k config get-contexts
    else
        local match
        match=$(k config get-contexts | sed -e 1d -e 's/^[* ]*//' | awk "/$context/ { print \$1; exit 0 }")
        if [[ $? -ne 0 || ! -n $match ]]; then
            echo "kc: no context matched /$context/: $match" 1>&2
            return 1
        fi;
        k config use-context "$match"
    fi
}