Implement basic packaging/install/entry scripts

The packaging script will create a new tar.bz2 archive containing an install
script, a set of docker images, and a root folder with files to be installed.
The root folder includes a systemd service, a docker compose file, an entry
script, and a template config file.

On installation docker images are loaded onto the target system, install files
are copied, then systemd services are installed.

package.sh

@@ -0,0 +1,92 @@
+#!/bin/bash
+
+#
+# Copyright (C) Wendepunkt Medical Innovations, Inc - All Rights Reserved.
+# Unauthorized copying of this file, via any medium is strictly prohibited.
+# Proprietary and confidential
+#
+# For information: dev@signalytic.ca
+#
+
+# basic path info
+LOCATION="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+PROJECT_ROOT="$(realpath $LOCATION)"
+PACKAGE_NAME="streamline-emr"
+OUTPUT_DIR="$PROJECT_ROOT/build-packages"
+
+# work from the project root
+pushd $PROJECT_ROOT > /dev/null
+
+# Exit on error:
+set -e
+trap 'echo "Error: Last command failed with exit code $?."' ERR
+
+# generate version name
+# use ci tag name if available (e.g. "v1.2")
+if [ $CI_COMMIT_TAG ]; then
+  VERSION_NAME="$CI_COMMIT_TAG"
+
+# otherwise if ci, use BRANCH-COMMIT
+# Note: commit count is harder to get to from CI - can't reproduce the git
+#       describe functionality as easily
+elif [ $CI_COMMIT_BRANCH ]; then
+  VERSION_NAME="$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA"
+
+# if not ci, try to use git
+elif command -v git &> /dev/null; then
+  VERSION_NAME=$(git describe --always --tags --dirty)
+
+# fallback
+else
+  VERSION_NAME="unknown"
+fi
+
+OUTPUT_NAME="$PACKAGE_NAME-$VERSION_NAME-$(arch)"
+OUTPUT_FILE="$OUTPUT_NAME.tar.bz2"
+OUTPUT_PATH="$OUTPUT_DIR/$OUTPUT_FILE"
+
+# create a new temp directory to stage files
+for i in {1..9999};do
+  STAGING_DIR="tmp-staging-$i"
+  if [ ! -d $STAGING_DIR ]; then
+    break
+  fi
+done
+if [ -d $STAGING_DIR ]; then
+  echo "Failed to generate temp staging dir"
+  exit 1
+fi
+
+# add files
+mkdir ${STAGING_DIR}
+cp ${PROJECT_ROOT}/install.sh ${STAGING_DIR}/
+cp -a ${PROJECT_ROOT}/root ${STAGING_DIR}/
+
+# add images
+IMAGES_DIR=${STAGING_DIR}/images
+mkdir -p ${IMAGES_DIR}
+i=0
+for image in $(find root/ -name docker-compose.yml | xargs grep 'image:.*' | awk '{print $2}');do
+  i=$((i+1))
+  name="image${i}.img"
+  echo "addding '$name' -> '$image'"
+  docker pull $image
+  docker save -o ${IMAGES_DIR}/$name $image
+done
+
+# setup output directory and cleanup old files if necessary
+mkdir -p $OUTPUT_DIR
+rm -rf $OUTPUT_PATH
+
+pushd $STAGING_DIR  > /dev/null
+tar -cjf $OUTPUT_PATH *
+popd > /dev/null
+
+# cleanup staging files
+rm -r $STAGING_DIR
+
+echo "output: $OUTPUT_PATH"
+
+popd > /dev/null
+
+exit 0