WIP: improving helm setup

.github/ci/ct.yaml

@@ -0,0 +1,5 @@
+chart-dirs:
+  - ./charts
+helm-extra-args: "--timeout=5m"
+check-version-increment: false
+target-branch: master

.github/workflows/helm.yaml

@@ -0,0 +1,44 @@
+name: Helm
+
+on:
+  push:
+    branches:
+      - master
+      - release-*
+    paths:
+      - 'charts/**'
+  pull_request:
+    paths:
+      - 'charts/**'
+
+jobs:
+  lint-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v2.1
+        with:
+          version: v3.4.2
+
+      - uses: actions/setup-python@v3.1.2
+        with:
+          python-version: 3.7
+
+      - name: Set up chart-testing
+        uses: helm/chart-testing-action@v2.2.1
+
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed --config=.github/ci/ct.yaml)
+          if [[ -n "$changed" ]]; then
+            echo "::set-output name=changed::true"
+          fi
+
+      - name: Run chart-testing (lint)
+        run: ct lint --config=.github/ci/ct.yaml

.gitignore

@@ -4,4 +4,5 @@ vendordiff.patch
 .idea/
 *.code-workspace
 .vscode/
-kind
+kind
+bin/

Makefile

@@ -135,13 +135,18 @@ ifndef HAS_GOLANGCI
 endif
 	./_output/bin/golangci-lint run
 
-lint-chart: ensure-helm-install
-	helm lint ./charts/descheduler
-
-test-helm: ensure-helm-install
-	./test/run-helm-tests.sh
+# helm
 
 ensure-helm-install:
 ifndef HAS_HELM
 	curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 && chmod 700 ./get_helm.sh && ./get_helm.sh
 endif
+
+lint-chart: ensure-helm-install
+	helm lint ./charts/descheduler
+
+build-helm:
+	helm package ./charts/descheduler --dependency-update --destination ./bin/chart
+
+test-helm: ensure-helm-install
+	./test/run-helm-tests.sh

docs/contributor-guide.md

@@ -52,5 +52,21 @@ The helm tests runs as part of descheduler CI. But, to run it manually from the
 make test-helm
 ```
 
+## Build Helm Package locally
+
+If you made some changes in the chart, and just want to check if templating is ok, or if the chart is buildable, you can run this command to have a package built from the `./charts` directory.
+
+```
+make build-helm
+```
+
+## Lint Helm Chart locally
+
+To check linting of your changes in the helm chart locally you can run:
+
+```
+make lint-helm
+```
+
 ### Miscellaneous
 See the [hack directory](https://github.com/kubernetes-sigs/descheduler/tree/master/hack) for additional tools and scripts used for developing the descheduler.