#!/usr/bin/env bash

echoerr() { echo -e "$@" 1>&2; }

check_is_installed() {
    local __name="$1"
    local __extra_msg="$2"
    if ! is_installed "$__name"; then
        echo "FATAL: Missing requirement '$__name'"
        echo "Please install $__name before running this script."
        if [[ -n $__extra_msg ]]; then
            echo ""
            echo "$__extra_msg"
            echo ""
        fi
        exit 1
    fi
}

is_installed() {
    local __name="$1"
    if $(which $__name >/dev/null 2>&1); then
        return 0
    else
        return 1
    fi
}