automate Helm chart release process (#69)

* automate Helm chart release process

.github/workflows/helm-build.yml

@@ -3,28 +3,60 @@ name: Helm CI - TIP WLAN Cloud Master
 on: 
   push:
     branches: [ master ]
+    tags: [ "v*" ]
 
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-        with:
-          ssh-key: ${{ secrets.GH_AUTOMATION_KEY }}
-          submodules: true
-      - name: Login to TIP Docker registry 
-        uses: azure/docker-login@v1
-        with:
-          login-server: tip-tip-wlan-cloud-docker-repo.jfrog.io
-          username: build-pipeline
-          password: ${{ secrets.DOCKER_REPO_PASSWORD }}
       - name: Login to TIP Helm chart registry
         run: helm repo add tip-wlan-cloud-helm-virtual-repo https://tip.jfrog.io/artifactory/tip-wlan-cloud-helm-virtual-repo --username build-pipeline --password ${{ secrets.HELM_REPO_PASSWORD }}
       - name: Build tip-wlan chart file
-        run: tar -czf tip-wlan.tgz tip-wlan
-      - name: Upload tip-wlan chart to the TIP helm registry
-        run: curl -ubuild-pipeline:${{ secrets.HELM_REPO_PASSWORD }} -T tip-wlan.tgz "https://tip.jfrog.io/artifactory/tip-wlan-cloud-helm-repo/tip-wlan.tgz"
-      - name: Verify that chart was uploaded successfully
         run: |
-          helm repo update
-          helm search repo tip
+          if [[ "${{ github.ref }}" == "refs/tags/"* ]]; then
+            PACKAGE_OPTS="--version ${GITHUB_REF#refs/tags/v}"
+          else
+            PACKAGE_OPTS=""
+          fi
+          helm package $PACKAGE_OPTS -u tip-wlan
+      - name: Store chart as artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: helm-chart
+          path: tip-wlan-*.tgz
+      - name: Upload tip-wlan chart to the TIP helm registry
+        run: |
+          if [[ "${{ github.ref }}" == "refs/tags/"* ]]; then
+            curl -ubuild-pipeline:${{ secrets.HELM_REPO_PASSWORD }} -T tip-wlan-${GITHUB_REF#refs/tags/v}.tgz "https://tip.jfrog.io/artifactory/tip-wlan-cloud-helm-repo/tip-wlan-${GITHUB_REF#refs/tags/v}.tgz"
+          else
+            curl -ubuild-pipeline:${{ secrets.HELM_REPO_PASSWORD }} -T tip-wlan-*.tgz "https://tip.jfrog.io/artifactory/tip-wlan-cloud-helm-repo/tip-wlan-master.tgz"
+          fi
+
+  release:
+    runs-on: ubuntu-latest
+    needs: [ build ]
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+      - uses: actions/checkout@v2
+      - name: setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.8"
+      - name: install keepachangelog
+        run: pip install keepachangelog
+      - name: create release description
+        continue-on-error: true
+        run: python .github/workflows/prepare-release-description.py ${GITHUB_REF#refs/tags/v} > RELEASE.md
+      - name: download Helm chart artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: helm-chart
+      - name: create release
+        uses: softprops/action-gh-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          files: tip-wlan-*.tgz
+          body_path: RELEASE.md
+          prerelease: ${{ contains(github.ref, 'rc') }}

.github/workflows/prepare-release-description.py

@@ -0,0 +1,24 @@
+import sys
+
+import keepachangelog
+
+CATEGORIES = ['added', 'changed', 'deprecated', 'removed', 'fixed', 'security']
+
+version = sys.argv[1]
+
+try:
+    changes = keepachangelog.to_dict("CHANGELOG.md")[version]
+except KeyError:
+    print(f'No changelog entry for version {version}', file=sys.stderr)
+    exit(1)
+
+
+print('## Changelog')
+for category in CATEGORIES:
+    entries = changes.get(category, [])
+
+    if entries:
+        print(f'### {category.capitalize()}') 
+
+    for entry in entries:
+        print(f'- {entry}') 

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased](xxx)
+## [Unreleased] - YYYY-MM-DD
 
 ### Added
 
@@ -26,9 +26,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Various secrets in subcharts as they are now part of the parent chart
 - references to vendor specific values [#40](https://github.com/Telecominfraproject/wlan-cloud-helm/pull/40)
 
-## [0.4.0](https://github.com/Telecominfraproject/wlan-cloud-helm/compare/f7c67645736e3dac498e2caec8c267f04d08b7bc...v0.4) - 2021-01-28
+## [0.4.0] - 2021-01-28
 
 ### Added
 
 - Initial changelog entry. This is the first versioned release. Next releases will include a detailed overview of all the major changes introduced since the last version.
-
+- [Changes since first commit](https://github.com/Telecominfraproject/wlan-cloud-helm/compare/f7c67645736e3dac498e2caec8c267f04d08b7bc...v0.4)