#!/bin/bash

# This post build hook creates multi-architecture docker manifests.
# It's all a bit complicated for some reason.
set -e -o pipefail

VERSION=$(git tag -l --merged | tail -n1 | tr -d v)
SHORTVER=$(echo $VERSION | cut -d. -f1,2)
if [ "$BUILDS" != "" ] && [ "$VERSION" != "" ]; then
  TAGS=latest
fi

# Push the extra custom images that were created.
for build in $BUILDS; do
  os=$(echo $build | cut -d: -f1)
  name=$(echo $build | cut -d: -f2)
  echo "Pushing Image ${IMAGE_NAME}_${os}_${name}"
  docker push ${IMAGE_NAME}_${os}_${name}
  IMAGES="${IMAGES} ${IMAGE_NAME}_${os}_${name}"
done
echo "Annotating Images: ${IMAGES}"

[ "$VERSION" != "$SOURCE_BRANCH" ] || TAGS="latest $VERSION $SHORTVER stable"
echo "Version: $VERSION, Source: $SOURCE_BRANCH, Building tags: ${TAGS}"

for tag in $TAGS; do
  docker manifest create --amend ${DOCKER_REPO}:${tag} $IMAGES
  for build in $BUILDS; do
    os=$(echo $build | cut -d: -f1)
    name=$(echo $build | cut -d: -f2)
    arch=$(echo $build | cut -d: -f3)
    vari=$(echo $build | cut -d: -f4)
    docker manifest annotate ${DOCKER_REPO}:${tag} ${IMAGE_NAME}_${os}_${name} --os ${os} --arch ${arch} --variant "${vari}"
  done
  echo "Pushing Manifest ${DOCKER_REPO}:${tag}"
  docker manifest push ${DOCKER_REPO}:${tag}
done