#!/usr/bin/env bash
#
# A simplified docker login approach that doesn't depends on the docker binary
#
# Usage: ./docker-login <registry> <username> <password>
set -euo pipefail

registry=$1
username=$2
password=$3

mkdir ~/.docker

cat <<DOCKER_CONF > ~/.docker/config.json
{
  "auths": {
    "$registry": {
      "auth": "$(printf "%s:%s" "$username" "$password" | base64)"
    }
  }
}
DOCKER_CONF