Add Helm linting

.github/workflows/build-push-artifacts.yaml

@@ -2,6 +2,37 @@ name: Publish artifacts
 # Run the tasks on every push
 on: push
 jobs:
+  helm_lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v1
+        with:
+          version: v3.8.1
+
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+
+      - name: Set up chart-testing
+        uses: helm/[email protected]
+
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed --targer-branch main)
+          if [[ -n "$changed" ]]; then
+            echo "::set-output name=changed::true"
+          fi
+
+      - name: Run chart-testing (lint)
+        run: ct lint
+
   build_push_chart:
     name: Build and push Helm charts
     runs-on: ubuntu-latest

chart_schema.yaml

@@ -0,0 +1,37 @@
+name: str()
+home: str(required=False)
+version: str()
+apiVersion: str()
+appVersion: any(str(), num(), required=False)
+description: str(required=False)
+keywords: list(str(), required=False)
+sources: list(str(), required=False)
+maintainers: list(include('maintainer'), required=False)
+dependencies: list(include('dependency'), required=False)
+icon: str(required=False)
+engine: str(required=False)
+condition: str(required=False)
+tags: str(required=False)
+deprecated: bool(required=False)
+kubeVersion: str(required=False)
+annotations: map(str(), str(), required=False)
+type: str(required=False)
+---
+maintainer:
+  name: str(required=False)
+  email: str(required=False)
+  url: str(required=False)
+---
+dependency:
+  name: str()
+  version: str()
+  repository: str(required=False)
+  condition: str(required=False)
+  tags: list(str(), required=False)
+  enabled: bool(required=False)
+  import-values: any(list(str()), list(include('import-value')), required=False)
+  alias: str(required=False)
+---
+import-value:
+  child: str()
+  parent: str()

ct.yaml

@@ -0,0 +1,3 @@
+chart-dirs:
+  - .
+validate-maintainers: false

lintconf.yaml

@@ -0,0 +1,42 @@
+---
+rules:
+  braces:
+    min-spaces-inside: 0
+    max-spaces-inside: 0
+    min-spaces-inside-empty: -1
+    max-spaces-inside-empty: -1
+  brackets:
+    min-spaces-inside: 0
+    max-spaces-inside: 0
+    min-spaces-inside-empty: -1
+    max-spaces-inside-empty: -1
+  colons:
+    max-spaces-before: 0
+    max-spaces-after: 1
+  commas:
+    max-spaces-before: 0
+    min-spaces-after: 1
+    max-spaces-after: 1
+  comments:
+    require-starting-space: true
+    min-spaces-from-content: 2
+  document-end: disable
+  document-start: disable           # No --- to start a file
+  empty-lines:
+    max: 2
+    max-start: 0
+    max-end: 0
+  hyphens:
+    max-spaces-after: 1
+  indentation:
+    spaces: consistent
+    indent-sequences: whatever      # - list indentation will handle both indentation and without
+    check-multi-line-strings: false
+  key-duplicates: enable
+  line-length: disable              # Lines can be any length
+  new-line-at-end-of-file: enable
+  new-lines:
+    type: unix
+  trailing-spaces: enable
+  truthy:
+    level: warning