build_utils.sh

#!/usr/bin/env bash

# Functions to generate version numbers for this project

function version_tag() {
  echo "$(git rev-parse --short=8 HEAD)"
}

# generate less specific versions, eg. given 1.2.3 will print 1.2 and 1
# (note: the argument itself is not printed, append it explicitly if needed)
function gen_versions()
{
  local version=$1
  while [[ $version = *.* ]]; do
    version=${version%.*}
    echo $version
  done
}

# tag_and_publish tag source image1 image2 ...
function tag_and_push() {
  local tag="$1"; shift
  local source="$1"; shift

  for image in "$@"; do
    local target=$image:$tag
    echo "Tagging and pushing $target..."
    docker tag "$source" "$target"
    docker push "$target"
  done
}