Tiny shell script to get exact stats from DockerHub

dockerhub-stat.sh

#!/usr/bin/env sh

if [ "$#" -eq 0 ]
then
    echo -e "usage:\t$0 <image>" >&2
    echo -e "\t$0 mysql/mysql-server" >&2
    exit 1
fi

if ! command -v jq &> /dev/n
then
    echo "jq is not available on your system" >&2
    exit 1
fi

image=$1
url="https://hub.docker.com/v2/repositories/${image}/"

echo "Getting data for ${image}" >&2

curl -s $url | jq