build

#!/bin/bash -e

DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
DATA_BASE_IMAGE_VERSION=0.9.17

usage() {
  cat <<END
Usage: $progname OPTIONS
  -c            Required: Specify the main container name. Will only be built if it doesn't exist, unless -f is passed
  -f            Force a rebuild of the main container, even if it exists
  -p            Path to the docker root
  -h            Display this help text
${*:-}
END
  exit 1
}

while getopts "fc:p:" OPTION ; do
  case $OPTION in
    c)
      container_name=$OPTARG
      ;;
    f)
      force_rebuild=true
      ;;
    p)
      docker_root=$OPTARG
      ;;
    *)
      usage
      ;;
  esac
done

if [[ -z "$container_name" ]]; then
  echo "Please specify the container name with -c <container_name>"
  exit 1
fi

if [[ -z "$docker_root" ]]; then
  echo "Please specify the container name with -p <docker_root>"
  exit 1
fi

. "$DIR/start_docker"

need_build=false

if [[ "$force_rebuild" == "true" ]]; then
  need_build=true
elif [[ -z "$(docker images | grep -E '^'"$container_name"'\s+')" ]]; then
  # no docker containers with the term "$container_name" in their description
  need_build=true
else
  if [[ ! -z "$(which md5sum)" ]]; then
    md5_tool=md5sum
  elif [[ ! -z "$(which md5)" ]]; then
    md5_tool=md5
  else
    echo "No md5 tool! Forcing rebuild"
    need_build=true
  fi

  if [[ ! -z "$md5_tool" ]]; then
    current_build_md5=$(find . \( -type f \( -name Dockerfile -o -path "./configs/*" -o -path "./container_scripts/*" -o -path "./generated/*" \) \) -exec $md5_tool "{}" \; | $md5_tool | cut -d " " -f 1)
    mkdir -p "$docker_root/tmp"
    build_md5_file=$docker_root/tmp/build_md5
    if [[ ! -f "$build_md5_file" || "$(cat $build_md5_file)" != "$current_build_md5" ]]; then
      echo "build files changed, forcing rebuild"
      printf $current_build_md5 >$build_md5_file
      need_build=true
    fi
  fi
fi

running_output="$(docker ps | grep -E '\s+'"$container_name"'\s+')" || true
if [[ "$need_build" == "true" && ! -z "$running_output" ]]; then
  echo "Trying to rebuild the container image but the container is already running. Stopping the existing container"
  container_id=`echo "$running_output" | perl -e 'printf +(split(/\s+/, <>))[0]'`
  docker stop "$container_id"
fi

if [[ "$need_build" == "true" ]]; then
  docker build -t $container_name "$docker_root"
fi