Pretty download wrapper for wget

pretty_wget_download.sh

#!/usr/bin/env bash

download() {
    local url="$1"
    local destin="$2"

    echo -n "   "
    if [ ! -z "${destin}" ]; then
        wget --progress=dot "${url}" -O  "${destin}" 2>&1 | grep --line-buffered "%" | \
        sed -u -e "s,\.,,g" | awk '{printf("\b\b\b\b%4s", $2)}'
    else
        wget --progress=dot "${url}" 2>&1 | grep --line-buffered "%" | \
        sed -u -e "s,\.,,g" | awk '{printf("\b\b\b\b%4s", $2)}'
    fi
    echo -ne "\b\b\b\b"
    echo "done"
}


# Example
kernel_url="http://stable.release.core-os.net/amd64-usr/current/coreos_production_pxe.vmlinuz"
echo -n "Downloading ${kernel_url}:  "
download "${kernel_url}" "vmlinuz"