Share setup sub-action in CI (#615)

* Share setup sub-action in CI

Signed-off-by: Yuri Shkuro <github@ysh.us>

.github/actions/prepare-k8s/action.yaml

@@ -0,0 +1,51 @@
+name: Prepare K8s for Helm tests
+runs:
+  using: "composite"
+  steps:
+    - name: Set up Helm
+      uses: azure/setup-helm@v4
+      with:
+        version: v3.14.4
+
+    # Python is required because `ct lint` runs Yamale (https://github.com/23andMe/Yamale) and
+    # yamllint (https://github.com/adrienverge/yamllint) which require Python
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.7
+
+    - name: Set up chart-testing
+      uses: helm/chart-testing-action@v2.6.1
+      with:
+        version: v3.10.1
+
+    - name: Create kind cluster
+      uses: helm/kind-action@v1.9.0
+
+    - name: Install kubectl
+      uses: azure/setup-kubectl@v4.0.0
+      with:
+        version: 'v1.28.8'
+      id: install
+
+    - name: Set up cert-manager
+      shell: bash
+      run: |
+        kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/kind/deploy.yaml --namespace ingress-nginx
+        kubectl label node --all ingress-ready=true
+        kubectl describe pod --selector=app.kubernetes.io/component=controller -n ingress-nginx
+        kubectl wait --namespace ingress-nginx --for=condition=ready pod --selector=app.kubernetes.io/component=controller --timeout=5m
+        kubectl apply --validate=false -f https://github.com/jetstack/cert-manager/releases/download/v1.6.1/cert-manager.yaml
+
+    - name: Set up cmctl
+      shell: bash
+      run: |
+        curl -sSL -o cmctl.tar.gz https://github.com/cert-manager/cert-manager/releases/download/v1.6.1/cmctl-linux-amd64.tar.gz
+        tar xzf cmctl.tar.gz
+        sudo mv cmctl /usr/local/bin
+        cmctl version
+
+    - name: Check if cert-manager is up
+      shell: bash
+      run: |
+        cmctl check api --wait=5m

.github/workflows/lint-test.yaml

@@ -3,11 +3,10 @@ name: Lint and Test Charts
 on: pull_request
 
 jobs:
-  lint-test:
+  lint:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v2
+      - uses: actions/checkout@v2
         with:
           fetch-depth: 0
 
@@ -39,34 +38,14 @@ jobs:
       - name: Run chart-testing (lint)
         run: ct lint --config ct.yaml
 
-      - name: Create kind cluster
-        uses: helm/kind-action@v1.9.0
-        if: steps.list-changed.outputs.changed == 'true'
-
-      - name: Install kubectl
-        uses: azure/setup-kubectl@v4.0.0
+  test-with-cassandra:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
         with:
-          version: 'v1.28.8'
-        id: install
-
-      - name: Set up cert-manager
-        run: |
-          kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/kind/deploy.yaml --namespace ingress-nginx
-          kubectl label node --all ingress-ready=true
-          kubectl describe pod --selector=app.kubernetes.io/component=controller -n ingress-nginx
-          kubectl wait --namespace ingress-nginx --for=condition=ready pod --selector=app.kubernetes.io/component=controller --timeout=5m
-          kubectl apply --validate=false -f https://github.com/jetstack/cert-manager/releases/download/v1.6.1/cert-manager.yaml
-
-      - name: Set up cmctl
-        run: |
-          curl -sSL -o cmctl.tar.gz https://github.com/cert-manager/cert-manager/releases/download/v1.6.1/cmctl-linux-amd64.tar.gz
-          tar xzf cmctl.tar.gz
-          sudo mv cmctl /usr/local/bin
-          cmctl version
+          fetch-depth: 0
 
-      - name: Check if cert-manager is up
-        run: |
-          cmctl check api --wait=5m
+      - uses: ./.github/actions/prepare-k8s
 
       - name: Run chart-testing (install)
         run: ct install --config ct.yaml