#!/usr/bin/env bash
#
# Travis CI specific build script
#
set -euo pipefail

# default to Docker Hub
# the user has to set REGISTRY_USER and REGISTRY_PASSWORD
: "${REGISTRY:=docker.io}"
: "${IMAGE_PREFIX:=nixpkgs}"

# either set NIX_PATH and IMAGE_TAG, or set NIXPKGS_CHANNEL
if [[ -n "${NIXPKGS_CHANNEL:-}" ]]; then
  : "${IMAGE_TAG:=$NIXPKGS_CHANNEL}"
  export NIX_PATH=nixpkgs=channel:$NIXPKGS_CHANNEL
fi

./build

if [[ "$TRAVIS_BRANCH" = master && -z "${TRAVIS_PULL_REQUEST_BRANCH:-}" ]]; then
  ./docker-login "$REGISTRY_USER" "$REGISTRY_PASSWORD" "$REGISTRY"
  ./push-all "$REGISTRY" "$IMAGE_PREFIX" "$IMAGE_TAG"
  if [[ $REGISTRY = *docker.io ]]; then
    ./dockerhub-metadata "$REGISTRY_USER" "$REGISTRY_PASSWORD" "$IMAGE_PREFIX"
  fi
else
  echo "=== not pushing on non-master ==="
fi