Add script to publish release and auto generate CHANGELOG

Makefile

@@ -2,28 +2,28 @@ IMAGE_REPO=infracloud/botkube
 TAG=$(shell cut -d'=' -f2- .release)
 
 .DEFAULT_GOAL := build
-.PHONY: release git-tag check-git-status build pre-build tag-image publish helm-chart
+.PHONY: release git-tag check-git-status build container-image pre-build tag-image publish
 
 #Docker Tasks
 #Make a release
-release: check-git-status build tag-image publish helm-chart git-tag 
+release: check-git-status container-image tag-image publish git-tag 
 	@echo "Successfully released version $(TAG)"
 
 #Create a git tag
 git-tag:
 	@echo "Creating a git tag"
-	@git add .
-	@git commit -m "Bumped to version $(TAG)" ;
+	@git add .release helm/botkube deploy-all-in-one.yaml deploy-all-in-one-tls.yaml CHANGELOG.md
+	@git commit -m "Release $(TAG)" ;
 	@git tag $(TAG) ;
 	@git push --tags origin master;
 	@echo 'Git tag pushed successfully' ;
 
 #Check git status
 check-git-status:
 	@echo "Checking git status"
-	@if [ -n "$(shell git tag | grep $(TAG))" ] ; then echo 'Tag already exists' && exit 1 ; fi
-	@if [ -z "$(shell git remote -v)" ] ; then echo 'No remote to push tags to' && exit 1 ; fi
-	@if [ -z "$(shell git config user.email)" ] ; then echo 'Unable to detect git credentials' && exit 1 ; fi
+	@if [ -n "$(shell git tag | grep $(TAG))" ] ; then echo 'ERROR: Tag already exists' && exit 1 ; fi
+	@if [ -z "$(shell git remote -v)" ] ; then echo 'ERROR: No remote to push tags to' && exit 1 ; fi
+	@if [ -z "$(shell git config user.email)" ] ; then echo 'ERROR: Unable to detect git credentials' && exit 1 ; fi
 
 #Build the binary
 build: pre-build
@@ -38,24 +38,17 @@ container-image: pre-build
 #Pre-build checks
 pre-build:
 	@echo "Checking system information"
-	@if [ -z "$(shell go env GOOS)" ] || [ -z "$(shell go env GOARCH)" ] ; then echo 'Could not determine the system architecture.' && exit 1 ; fi
+	@if [ -z "$(shell go env GOOS)" ] || [ -z "$(shell go env GOARCH)" ] ; then echo 'ERROR: Could not determine the system architecture.' && exit 1 ; fi
 
 
 #Tag images
 tag-image: 
 	@echo 'Tagging image'
 	@docker tag $(IMAGE_REPO) $(IMAGE_REPO):$(TAG)
-	@docker tag $(IMAGE_REPO) $(IMAGE_REPO):latest
 
 #Docker push image
 publish:
 	@echo "Pushing docker image to repository"
 	@docker login
 	@docker push $(IMAGE_REPO):$(TAG)
 	@docker push $(IMAGE_REPO):latest	
-
-#Update Helm chart
-helm-chart:
-	@echo "Updating helm charts"
-	@sed -i 's/version.*/version: $(TAG)/' helm/botkube/Chart.yaml
-	@sed -i 's/{BOTKUBE_VERSION}/$(TAG)/' deploy-all-in-one.yaml

hack/release.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+set -e
+
+version=$(cut -d'=' -f2- .release)
+if [[ -z ${version} ]]; then
+    echo "Invalid version set in .release";
+    exit 1
+fi
+
+echo "Publishing release ${version}"
+
+generate_changelog() {
+    local version=$1
+
+    # generate changelog from github
+    github_changelog_generator infracloudio/botkube -t ${GITHUB_TOKEN} --future-release ${version} -o CHANGELOG.md
+    sed -i '$d' CHANGELOG.md
+}
+
+update_chart_yamls() {
+    local version=$1
+
+    sed -i "s/version.*/version: ${version}/" helm/botkube/Chart.yaml
+    sed -i "s/appVersion.*/appVersion: ${version}/" helm/botkube/Chart.yaml
+    sed -i "s/\bimage: \"infracloud\/botkube.*\b/image: \"infracloud\/botkube:${version}/g" deploy-all-in-one.yaml
+    sed -i "s/\bimage: \"infracloud\/botkube.*\b/image: \"infracloud\/botkube:${version}/g" deploy-all-in-one-tls.yaml
+
+    oldVersion=$(echo $(awk '/BOTKUBE_VERSION/ {getline; print}' deploy-all-in-one.yaml))
+    sed -i "s/\b${oldVersion}\b/value: ${version}/g" deploy-all-in-one.yaml
+    sed -i "s/\b${oldVersion}\b/value: ${version}/g" deploy-all-in-one-tls.yaml
+}
+
+update_chart_yamls $version
+generate_changelog $version
+make release
+
+echo "=========================== Done ============================="
+echo "Congratulations!! Release ${version} tagged."
+echo "Now go to github releases and public the release."
+echo "=============================================================="