#!/usr/bin/env bash
#
# Usage: ./dockerhub-image-matrix
set -euo pipefail

microbadge() {
  local name=$1
  local tag=${2:-latest}

  if [[ $tag != latest ]]; then
    name=$name:$tag
  fi

  local homepage=https://microbadger.com/images/$name

  # make sure that microbadger has loaded the image
  curl -o /dev/null -sfL "$homepage"

  echo "[![](https://images.microbadger.com/badges/image/$name.svg)]($homepage)"
}

## Main ##

releases_json=$(nix-instantiate ./release.nix --strict --eval --json)

echo "| Image / Tag | latest | nixos-18.09 | nixos-19.03 |"
echo "| ---         | ---    | ---         | ---         |"

for attr in $(echo "$releases_json" | jq -r "keys[]") ; do
  name=nixpkgs/$attr
  echo "| [$name](https://hub.docker.com/r/$name) | $(microbadge "$name") | $(microbadge "$name" "nixos-18.09") | $(microbadge "$name" "nixos-19.03") |"
done