feat(infra): Add workflow for helm lint

.github/configs/ct.yaml

@@ -0,0 +1,2 @@
+check-version-increment: false
+validate-maintainers: false

.github/configs/lintconf.yaml

@@ -0,0 +1,26 @@
+---
+rules:
+  braces:
+    level: error
+  brackets:
+    level: error
+  colons:
+    level: error
+  commas:
+    level: error
+  comments:
+    level: error
+  document-end: disable
+  document-start: disable           # No --- to start a file
+  hyphens:
+    level: warning
+  indentation:
+    level: warning
+  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

.github/workflows/helm-lint.yaml

@@ -0,0 +1,60 @@
+name: Lint and Test Charts
+
+on:
+  workflow_call:
+    inputs:
+      chartDirs:
+        description: "The root dir or dirs (separated with commas)"
+        type: string
+        required: false
+        default: "."
+
+jobs:
+  lint-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Checkout Shared Workflows repository
+        uses: actions/checkout@v4
+        with:
+          repository: MapColonies/shared-workflows
+          path: shared-workflows
+          token: ${{ secrets.GH_PAT }}
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v4.2.0
+        with:
+          version: v3.16.3
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+          check-latest: true
+
+      - name: Set up chart-testing
+        uses: helm/chart-testing-action@v2.6.1
+
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed --chart-dirs ${{ inputs.chartDirs }} --target-branch ${{ github.event.repository.default_branch }} --config shared-workflows/.github/configs/ct.yaml)
+          echo "changed=$changed"
+          if [[ -n "$changed" ]]; then
+            echo "changed=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Run chart-testing (lint)
+        if: steps.list-changed.outputs.changed == 'true'
+        run: ct lint --chart-dirs ${{ inputs.chartDirs }} --target-branch ${{ github.event.repository.default_branch }} --config shared-workflows/.github/configs/ct.yaml --lint-conf shared-workflows/.github/configs/lintconf.yaml
+
+      - name: Create kind cluster
+        if: steps.list-changed.outputs.changed == 'true'
+        uses: helm/kind-action@v1.10.0
+
+      - name: Run chart-testing (install)
+        if: steps.list-changed.outputs.changed == 'true'
+        run: ct install --chart-dirs ${{ inputs.chartDirs }} --target-branch ${{ github.event.repository.default_branch }} --config shared-workflows/.github/configs/ct.yaml

.github/workflows/pull_request.yaml

@@ -18,8 +18,25 @@ on:
         type: boolean
         required: false
         default: false
+      enableHelmLint:
+        description: "Flag to enable helm lint"
+        type: boolean
+        required: false
+        default: true
+      chartDirs:
+        description: "The root dir or dirs (separated with commas)"
+        type: string
+        required: false
+        default: "."
 
 jobs:
+  helm-lint:
+    if: ${{ inputs.enableHelmLint == true }}
+    uses: MapColonies/shared-workflows/.github/workflows/helm-lint.yaml@master
+    secrets: inherit
+    with:
+      chartDirs: ${{ inputs.chartDirs }}
+
   eslint:
     name: Run eslint
     runs-on: ubuntu-latest