Simple shell script for building a docker image (with a devenv layer)

another-layer-dockerbuild.sh

#!/bin/sh

# Exit script on any errors
set -e

usage() {
  cat << USAGE
Usage: $(basename $0) [-dhin] [IMAGE-NAME]

This performs a docker build of the default Dockerfile in the current
directory.

If an image name is not provided, it is named after the current directory.

The image name is returned in stdout

OPTIONS:
  -d  builds the devenv layer (or the --target in BUILD_TARGET)
  -i  builds the integration layer
  -n  builds with --no-cache

  -h  displays usage information
USAGE
}

err_exit() {
  err_code=$1
  err_msg="$2"
  echo "ERROR: ${err_msg}[${err_code}]" 1>&2
  exit $err_code
}

# -- MAIN --

# Handle options
while getopts ":dhin" options; do
  case "${options}" in
    d)
      BUILD_TARGET="${BUILD_TARGET:-devenv}"
      build_layer=1
      ;;
    i)
      BUILD_TARGET="deploy-integration"
      build_layer=1
      ;;
    n)
      no_cache="--no-cache"
      ;;
    h)
      usage
      exit
      ;;
    \?)
      usage
      err_exit 1 "Invalid Option: '-$OPTARG'"
      ;;
  esac
done
shift $((OPTIND-1))

# Image Name
image_name=$1

if [ -z "${image_name}" ] ; then
  image_name=$(basename "$(pwd)")
  [ -n "${build_layer}" ] && image_name="${image_name}-${BUILD_TARGET}"
fi

# Default tag is latest
[ "${image_name#*:}" != "$image_name" ] || image_name="${image_name}:latest"

# If building non-default layer
[ -n "${build_layer}" ]&& build_target="--target ${BUILD_TARGET}"

# Build Command
docker_build_cmd="docker build ${no_cache} ${build_target} -t ${image_name} ."

# Redirect command output to stderr
echo "DOCKER BUILD: [${docker_build_cmd}]" 1>&2
$docker_build_cmd 1>&2

# Output the full image name with tag (image_name may not have tag)
echo $image_name

dockerbuild.sh

#!/bin/sh

# Exit script on any errors
set -e

usage() {
  cat << USAGE
Usage: $(basename $0) [-dhn] [IMAGE-NAME]

This performs a docker build of the default Dockerfile in the current
directory.

If an image name is not provided, it is named after the current directory.

The image name is returned in stdout

OPTIONS:
  -d  builds the devenv layer (or the --target in BUILD_TARGET)
  -n  builds with --no-cache

  -h  displays usage information
USAGE
}

err_exit() {
  err_code=$1
  err_msg="$2"
  echo "ERROR: ${err_msg}[${err_code}]" 1>&2
  exit $err_code
}

# -- MAIN --
BUILD_TARGET="${BUILD_TARGET:-devenv}"

# Handle options
while getopts ":dhn" options; do
  case "${options}" in
    d)
      devenv=1
      ;;
    n)
      no_cache="--no-cache"
      ;;
    h)
      usage
      exit
      ;;
    \?)
      usage
      err_exit 1 "Invalid Option: '-$OPTARG'"
      ;;
  esac
done
shift $((OPTIND-1))

# Image Name
image_name=$1

if [ -z "${image_name}" ] ; then
  image_name=$(basename "$(pwd)")
  [ -n "${devenv}" ] && image_name="${image_name}-${BUILD_TARGET}"
fi

# Default tag is latest
[ "${image_name#*:}" != "$image_name" ] || image_name="${image_name}:latest"

# Targeted build (append to image name)
[ -n "${devenv}" ]&& build_target="--target ${BUILD_TARGET}"

# Build Command
docker_build_cmd="docker build ${no_cache} ${build_target} -t ${image_name} ."

# Redirect command output to stderr
echo "DOCKER BUILD: [${docker_build_cmd}]" 1>&2
$docker_build_cmd 1>&2

# Output the full image name with tag (image_name may not have tag)
echo $image_name