added a script to build/publish docker images
diff --git a/docker/ci-docker.sh b/docker/ci-docker.sh
new file mode 100755
index 0000000..d891976
--- /dev/null
+++ b/docker/ci-docker.sh
@@ -0,0 +1,135 @@
+#!/bin/bash
+set -o errexit
+
+realpath() {
+ echo "$(cd "$(dirname "$1")"; pwd)/$(basename "$1")"
+}
+
+DOCKER_DIR=$(dirname $(realpath $0))
+PROJECT_DIR=$(dirname $DOCKER_DIR )
+SCRATCH_DIR="$HOME/.heron-docker"
+
+cleanup() {
+ if [ -d $SCRATCH_DIR ]; then
+ echo "Cleaning up scratch dir"
+ rm -rf $SCRATCH_DIR
+ fi
+}
+
+trap cleanup EXIT
+
+
+setup_scratch_dir() {
+ if [ ! -f "$1" ]; then
+ mkdir $1
+ mkdir $1/artifacts
+ fi
+
+ cp $DOCKER_DIR/* $1
+}
+
+build_exec_image() {
+ INPUT_TARGET_PLATFORM=$1
+ HERON_VERSION=$2
+ DOCKER_TAG_PREFIX=$3
+ OUTPUT_DIRECTORY=$(realpath $4)
+
+ if [ "$INPUT_TARGET_PLATFORM" == "latest" ]; then
+ TARGET_PLATFORM="ubuntu14.04"
+ DOCKER_TAG="$DOCKER_TAG_PREFIX/heron:$HERON_VERSION"
+ DOCKER_LATEST_TAG="$DOCKER_TAG_PREFIX/heron:latest"
+ DOCKER_IMAGE_FILE="$OUTPUT_DIRECTORY/heron-$HERON_VERSION.tar"
+ else
+ TARGET_PLATFORM="$INPUT_TARGET_PLATFORM"
+ DOCKER_TAG="$DOCKER_TAG_PREFIX/heron-$TARGET_PLATFORM:$HERON_VERSION"
+ DOCKER_LATEST_TAG="$DOCKER_TAG_PREFIX/heron-$TARGET_PLATFORM:latest"
+ DOCKER_IMAGE_FILE="$OUTPUT_DIRECTORY/heron-$TARGET_PLATFORM-$HERON_VERSION.tar"
+ fi
+
+ DOCKER_FILE="$SCRATCH_DIR/Dockerfile.dist.$TARGET_PLATFORM"
+
+ setup_scratch_dir $SCRATCH_DIR
+
+ # need to copy artifacts locally
+ TOOLS_FILE="$OUTPUT_DIRECTORY/heron-tools-install.sh"
+ TOOLS_OUT_FILE="$SCRATCH_DIR/artifacts/heron-tools-install.sh"
+
+ CORE_FILE="$OUTPUT_DIRECTORY/heron-core.tar.gz"
+ CORE_OUT_FILE="$SCRATCH_DIR/artifacts/heron-core.tar.gz"
+
+ cp $TOOLS_FILE $TOOLS_OUT_FILE
+ cp $CORE_FILE $CORE_OUT_FILE
+
+ export HERON_VERSION
+
+ # build the image
+ echo "Building docker image with tag:$DOCKER_TAG"
+ if [ "$HERON_VERSION" == "nightly" ]; then
+ docker build --build-arg heronVersion=$HERON_VERSION -t "$DOCKER_TAG" -f "$DOCKER_FILE" "$SCRATCH_DIR"
+ else
+ docker build --build-arg heronVersion=$HERON_VERSION -t "$DOCKER_TAG" -t "$DOCKER_LATEST_TAG" -f "$DOCKER_FILE" "$SCRATCH_DIR"
+ fi
+
+ # save the image as a tar file
+ echo "Saving docker image to $DOCKER_IMAGE_FILE"
+ docker save -o $DOCKER_IMAGE_FILE $DOCKER_TAG
+}
+
+publish_exec_image() {
+ INPUT_TARGET_PLATFORM=$1
+ HERON_VERSION=$2
+ DOCKER_TAG_PREFIX=$3
+ INPUT_DIRECTORY=$(realpath $4)
+
+ if [ "$INPUT_TARGET_PLATFORM" -eq "latest" ]; then
+ TARGET_PLATFORM="ubuntu14.04"
+ DOCKER_TAG="$DOCKER_TAG_PREFIX/heron:$HERON_VERSION"
+ DOCKER_LATEST_TAG="$DOCKER_TAG_PREFIX/heron:latest"
+ DOCKER_IMAGE_FILE="$INPUT_DIRECTORY/heron-$HERON_VERSION.tar"
+ else
+ TARGET_PLATFORM="$INPUT_TARGET_PLATFORM"
+ DOCKER_TAG="$DOCKER_TAG_PREFIX/heron-$TARGET_PLATFORM:$HERON_VERSION"
+ DOCKER_LATEST_TAG="$DOCKER_TAG_PREFIX/heron-$TARGET_PLATFORM:latest"
+ DOCKER_IMAGE_FILE="$INPUT_DIRECTORY/heron-$TARGET_PLATFORM-$HERON_VERSION.tar"
+ fi
+
+ # publish the image to docker hub
+ if [ "$HERON_VERSION" == "nightly" ]; then
+ docker load -i $DOCKER_IMAGE_FILE
+ docker push "$DOCKER_TAG"
+ else
+ docker load -i $DOCKER_IMAGE_FILE
+ docker push "$DOCKER_TAG"
+ docker push "$DOCKER_LATEST_TAG"
+ fi
+}
+
+docker_image() {
+ OPERATION=$1
+
+ if [ "$OPERATION" == "build" ]; then
+ build_exec_image $2 $3 $4 $5
+ elif [ "$OPERATION" == "publish" ]; then
+ publish_exec_image $2 $3 $4 $5
+ else
+ echo "invalid operation"
+ fi
+}
+
+case $# in
+ 5)
+ docker_image $1 $2 $3 $4 $5
+ ;;
+
+ *)
+ echo "Usage: $0 <operation> <platform> <version_string> <tag-prefix> <input-output-directory> "
+ echo " "
+ echo "Platforms Supported: latest ubuntu14.04, ubuntu15.10, ubuntu16.04 centos7"
+ echo " "
+ echo "Example:"
+ echo " $0 build ubuntu14.04 0.12.0 heron ."
+ echo " $0 publish ubuntu14.04 0.12.0 streamlio ~/ubuntu"
+ echo " "
+ exit 1
+ ;;
+esac
