build-images

#!/bin/bash

unset CDPATH
SCRIPT_NAME=$( basename "$0" )
SCRIPT_HOME=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
CURRENT_DIR=$PWD

# defaults
source $SCRIPT_HOME/.env
BUILD_ARGS="--no-cache"
PUSH='false'

evalrc() {
    if [ "$1" -ne "0" ]; then
        echo "$2"
        cd $CURRENT_DIR
        exit $1
    fi
}

usage() {
    cat <<HELP
Usage: $SCRIPT_NAME [options] [IMAGE]
  * if IMAGE is omitted, all images will be built

OPTIONS:
  -h          Prints this message.
  -p          Push images to a repository or registry
  -d <repo>   Specify the destination repo to receive the images; implies -p;
              defaults to: "$REGISTRY"
  -c          Use cached layers when building containers; defaults to false
  -v          Enable verbose/debug output
HELP
}

while getopts ":pd:cv" opt; do
    case $opt in
        h  ) usage; exit 0;;
        p  ) PUSH='true';;
        d  ) PUSH='true'
             REGISTRY="${OPTARG}";;
        c  ) BUILD_ARGS="$(echo $BUILD_ARGS | sed -e s/--no-cache//g)";;
        v  ) set -x;;
        \?)
          echo "Invalid option: -$OPTARG" >&2
          usage
          exit 1
          ;;
        :)
          echo "Option -$OPTARG requires an argument." >&2
          usage
          exit 1
          ;;
    esac
done

shift $(($OPTIND - 1))

# Determine image name
if [ "$1" != "" ]; then
    IMAGE=$1
fi

get_image_names() {
  python -c 'import yaml,sys;y=yaml.safe_load(sys.stdin); print " ".join(y["services"].keys())' < $SCRIPT_HOME/docker-compose-build.yml
}

# tags a docker image with a version
tag_images() {
  TAG_IMAGES=${IMAGE:-$(get_image_names)}
  CP_VERSION="$( git describe | cut -d- -f 2 )"
  for IMG in ${TAG_IMAGES}; do
    docker tag $REGISTRY/$IMG:latest $REGISTRY/$IMG:$CP_VERSION
  done
}

echo "Building images..."
cd $SCRIPT_HOME
docker-compose -f docker-compose-build.yml build $BUILD_ARGS $IMAGE && tag_images
evalrc $? "Build not successful."

if [ $PUSH = true ]; then
  echo "Pushing images..."
  # pushes the version tag
  for IMG in ${TAG_IMAGES}; do
    docker push $REGISTRY/$IMG
    evalrc $? "Push not successful."
  done
fi