Added script for building images with injection of build_code

scripts/build.sh

@@ -0,0 +1,97 @@
+#!/bin/bash
+
+################################################################################
+# For this script to work properly it is required to define some environment variables
+# in the CI/CD Env variable declaration, while others should be passed as parameters.
+#
+#------------------------------------------------------------------------------
+# Defined as part of the CD/CI Env Variables:
+#
+# CD_DOCKER_USERNAME
+# A DockerHub username to be used for uploading the build.
+#
+# CD_DOCKER_PASSWORD
+# A DockerHub password to be used for uploading the build.
+#
+# CD_DOCKER_REPO
+# A DockerHub repository. By default the CD_REF_SLUG is also used as the docker repo.
+#
+# CD_BUILD_ALL
+# As the build is supposed to be done only for master (for a nightly deployments) and for releases
+# (like 'release-2.0.5' for production deployments), it is additionally required to include this
+# variable in order to build any other brnach, as it may be required for testing or reviewing work
+# as part of the development process.
+#
+
+display_usage() {
+  echo "This script should be used as part of a CI strategy."
+  echo -e "Usage:\n  build_image.sh [ARGUMENTS]"
+  echo -e "\nMandatory arguments \n"
+  echo -e "  repo_slug     The git repository  (e.g. bigbluebutton/greenlight)"
+  echo -e "\nOptional arguments \n"
+  echo -e "  branch | tag  The branch (e.g. master | release-2.0.5)"
+}
+
+# if less than two arguments supplied, display usage
+if [ $# -le 0 ]; then
+	display_usage
+	exit 1
+fi
+
+# check whether user had supplied -h or --help . If yes display usage
+if [[ ($# == "--help") ||  $# == "-h" ]]; then
+	display_usage
+	exit 0
+fi
+
+export CD_REF_SLUG=$1
+export CD_REF_NAME=$2
+if [ -z $CD_REF_NAME ]; then
+  export CD_REF_NAME=$(git branch | grep \* | cut -d ' ' -f2)
+fi
+
+if [ "$CD_REF_NAME" != "master" ] && [[ "$CD_REF_NAME" != *"release"* ]] && ( [ -z "$CD_BUILD_ALL" ] || [ "$CD_BUILD_ALL" != "true" ] ); then
+  echo "#### Docker image for $CD_REF_SLUG:$CD_REF_NAME won't be built"
+  exit 0
+fi
+
+# Include sqlite for production
+sqliteCount="$(grep "gem 'sqlite3'" Gemfile | wc -l)"
+
+if [ $sqliteCount -lt 2 ]; then
+  sed -i "/^group :production do/a\ \ gem 'sqlite3', '~> 1.3.6'" Gemfile
+fi
+
+# Set the version tag when it is a release or the commit sha was included.
+if [[ "$CD_REF_NAME" == *"release"* ]]; then
+  export CD_BUILD_NUMBER=${CD_REF_NAME:8}
+else
+  export CD_BUILD_NUMBER="$CD_REF_NAME ($(expr substr $(git rev-parse HEAD) 1 7))"
+fi
+
+# Build the image
+if [ -z $CD_DOCKER_REPO ]; then
+  export CD_DOCKER_REPO=$CD_REF_SLUG
+fi
+echo "#### Docker image $CD_DOCKER_REPO:$CD_REF_NAME is being built"
+docker build --build-arg build_number="${CD_BUILD_NUMBER}" -t $CD_DOCKER_REPO:$CD_REF_NAME .
+
+if [ -z "$CD_DOCKER_USERNAME" ] || [ -z "$CD_DOCKER_PASSWORD" ]; then
+  echo "#### Docker image for $CD_DOCKER_REPO can't be published because CD_DOCKER_USERNAME or CD_DOCKER_PASSWORD are missing (Ignore this warning if running outside a CD/CI environment)"
+  exit 0
+fi
+
+# Publish the image
+docker login -u="$CD_DOCKER_USERNAME" -p="$CD_DOCKER_PASSWORD"
+echo "#### Docker image $CD_DOCKER_REPO:$CD_REF_NAME is being published"
+docker push $CD_DOCKER_REPO
+
+# Publish image as latest and v2 if it is a release (excluding alpha and beta)
+if [[ "$CD_REF_NAME" == *"release"* ]] && [[ "$CD_REF_NAME" != *"alpha"* ]] && [[ "$CD_REF_NAME" != *"beta"* ]]; then
+  docker_image_id=$(docker images | grep -E "^$CD_DOCKER_REPO.*$CD_REF_NAME" | awk -e '{print $3}')
+  docker tag $docker_image_id $CD_DOCKER_REPO:latest
+  docker push $CD_DOCKER_REPO:latest
+  docker tag $docker_image_id $CD_DOCKER_REPO:v2
+  docker push $CD_DOCKER_REPO:v2
+fi
+exit 0