[bitnami/charts] Automate license checks (#17421)

* [bitnami/charts] Automate license checks

Signed-off-by: Raúl López <rlorpez@vmware.com>
Co-authored-by: Carlos Rodríguez Hernández <carlosrh@vmware.com>

.github/workflows/license-headers.yml

@@ -0,0 +1,16 @@
+# Copyright VMware, Inc.
+# SPDX-License-Identifier: APACHE-2.0
+
+---
+name: '[License] Check license headers'
+
+on:
+  pull_request:
+
+jobs:
+  license-headers-linter:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Check license Headers
+        uses: apache/skywalking-eyes/header@v0.4.0

.licenserc.yaml

@@ -0,0 +1,37 @@
+# Copyright VMware, Inc.
+# SPDX-License-Identifier: APACHE-2.0
+
+---
+header:
+  # License format for Helm templates
+  - comment: on-failure
+    license:
+      spdx-id: Apache-2.0
+      copyright-owner: VMware, Inc.
+
+      content: |
+        {{- /*
+        Copyright VMware, Inc.
+        SPDX-License-Identifier: APACHE-2.0
+        */}}
+
+    paths:
+      - "bitnami/**/templates/**/*.yml"
+      - "bitnami/**/templates/**/*.yaml"
+
+  # License format for all other YAML files
+  - comment: on-failure
+    license:
+      spdx-id: Apache-2.0
+      copyright-owner: VMware, Inc.
+
+      content: |
+        # Copyright VMware, Inc.
+        # SPDX-License-Identifier: APACHE-2.0
+
+    paths:
+      - "bitnami/**/*.yml"
+      - "bitnami/**/*.yaml"
+    paths-ignore:
+      - "bitnami/**/templates/**/*.yml"
+      - "bitnami/**/templates/**/*.yaml"

CONTRIBUTING.md

@@ -18,6 +18,14 @@ When submitting a PR make sure that it:
 - Must pass CI jobs for linting and test the changes on top of different k8s platforms. (Automatically done by the Bitnami CI/CD pipeline).
 - Must follow [Helm best practices](https://helm.sh/docs/chart_best_practices/).
 - Any change to a chart requires a version bump following [semver](https://semver.org/) principles. This is the version that is going to be merged in the GitHub repository, then our CI/CD system is going to publish in the Helm registry a new patch version including your changes and the latest images and dependencies.
+- Any change to a Helm template (especially new templates) must include a license header like the following:
+
+```yaml
+{{- /*
+Copyright VMware, Inc.
+SPDX-License-Identifier: APACHE-2.0
+*/}}
+```
 
 #### Sign Your Work
 
@@ -70,10 +78,25 @@ Notice the `Author` and `Signed-off-by` lines match. If they don't your PR will
 
 ### Adding a new chart to the repository
 
-There are three major technical requirements to add a new Helm chart to our catalog:
+There are five major technical requirements to add a new Helm chart to our catalog:
 
 - The chart should use Bitnami based container images. If they don't exist, you can [open a GitHub issue](https://github.com/bitnami/charts/issues/new/choose) and we will work together to create them.
 - Follow the same structure/patterns that the rest of the Bitnami charts (you can find a basic scaffolding in the [`template` directory](https://github.com/bitnami/charts/tree/main/template)) and the [Best Practices for Creating Production-Ready Helm charts](https://docs.bitnami.com/tutorials/production-ready-charts/) guide.
 - Use an [OSI approved license](https://opensource.org/licenses) for all the software.
+- Every new Helm template must include a license header like the following:
+
+```yaml
+{{- /*
+Copyright VMware, Inc.
+SPDX-License-Identifier: APACHE-2.0
+*/}}
+```
+
+- The exception to the license header rule above are `Chart.yaml` and `values.yaml` files, that use the following format instead:
+
+```yaml
+# Copyright VMware, Inc.
+# SPDX-License-Identifier: APACHE-2.0
+```
 
 Please, note we will need to check internally and evaluate the feasibility of adding the new solution to the catalog. Due to limited resources this step could take some time.

bitnami/clickhouse/templates/configmap-users-extra.yaml

@@ -1,3 +1,8 @@
+{{- /*
+Copyright VMware, Inc.
+SPDX-License-Identifier: APACHE-2.0
+*/}}
+
 {{- if and .Values.usersExtraOverrides (not .Values.usersExtraOverridesConfigmap) }}
 apiVersion: v1
 kind: ConfigMap

bitnami/jupyterhub/templates/proxy/service-account.yaml

@@ -1,3 +1,8 @@
+{{- /*
+Copyright VMware, Inc.
+SPDX-License-Identifier: APACHE-2.0
+*/}}
+
 {{- if .Values.proxy.serviceAccount.create }}
 apiVersion: v1
 kind: ServiceAccount