fix chart linting (newrelic#731)

Author: kilokang

.github/ct-install.yaml

@@ -0,0 +1,19 @@
+# In this repository there are two folder with charts that need to be released. One can think that it would be easier to  simply at to this file
+# a chart-dirs clause pointing to both of the folders at the same time:
+
+# ```yaml
+# chart-dirs:
+#   - library
+#   - charts
+# ```
+
+# In that case `ct install` is going to try to install the library chart and is going to fail. That is the reason there are two `ct.yaml` files, one
+# for the step that lint that includes all the folders at the same time and other of the installation step that test installability
+
+chart-dirs:
+# - library  # I leave this commented for clarity's sake
+  - charts
+
+chart-repos:
+  - kube-state-metrics=https://kubernetes.github.io/kube-state-metrics
+  - pixie-operator=https://pixie-operator-charts.storage.googleapis.com

.github/ct-lint.yaml

@@ -13,3 +13,7 @@
 chart-dirs:
   - library
   - charts
+
+chart-repos:
+  - kube-state-metrics=https://kubernetes.github.io/kube-state-metrics
+  - pixie-operator=https://pixie-operator-charts.storage.googleapis.com

.github/workflows/lint_test_charts.yaml

@@ -50,7 +50,7 @@ jobs:
       - name: Check for changed installable charts
         id: list-changed
         run: |
-          changed=$(ct list-changed)
+          changed=$(ct list-changed --config .github/ct-install.yaml)
           if [[ -n "$changed" ]]; then
             echo "::set-output name=changed::true"
           fi
@@ -63,6 +63,6 @@ jobs:
         run: kubectl create ns ct
 
       - name: Test install charts
-        run: ct install --namespace ct
+        run: ct install --namespace ct --config .github/ct-install.yaml
       - name: Test upgrade charts
-        run: ct install --namespace ct --upgrade
+        run: ct install --namespace ct --config .github/ct-install.yaml --upgrade