Version bump script

Adds an simple script to be used when a new version of the app should be
released. It will create a version tag on git and update the helm chart
to point to the version.

Makefile

@@ -135,3 +135,7 @@ stop-elasticsearch:
 
 wait-elasticsearch:
 	$(call wait-for, localhost:9200)
+
+.PHONY: bump-version
+bump-version:
+	bash scripts/bump-version.sh

scripts/bump-version.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+# This script should be used to bump new versions. It will create a git tag for 
+# the new version and it will update the Helm Chart used to deploy the app in 
+# Kubernetes.
+
+get_latest_version() {
+	git describe --tags
+}
+
+latest_version=`get_latest_version`
+if [ ! $? -eq 0 ]; then
+	echo "Cannot find any previous version. Please, check if there is some version tag."
+	exit 1
+fi
+echo "Latest version detected $latest_version"
+
+major=`echo $latest_version | sed 's/^v//g'  | sed 's/-.*$//' | sed 's/+.*$//'| awk '{split($0,version,"."); print version[1]}'`
+minor=`echo $latest_version | sed 's/^v//g'  | sed 's/-.*$//' | sed 's/+.*$//'| awk '{split($0,version,"."); print version[2]}'`
+patch=`echo $latest_version | sed 's/^v//g'  | sed 's/-.*$//' | sed 's/+.*$//'| awk '{split($0,version,"."); print version[3]}'`
+
+minor=$(($minor+1))
+
+new_version="$major.$minor.$patch"
+echo "New version: $new_version"
+
+echo "Creating new git tag."
+git tag $new_version -m "Version bump: $new_version"
+
+echo "Updating app version in the helm chart."
+sed -i "s/^appVersion:.*/appVersion: $new_version/" helm/Chart.yaml
+
+echo ""
+echo "Now you need to commit the changes! ;)"