added helm schema-gen plugin

Dockerfile

@@ -63,6 +63,14 @@ helm plugin install --version=v${HELM_LOCAL_CHART_VERSION_PLUGIN_VERSION} https:
 helm local-chart-version version
 EOF
 
+# Helm schema-gen plugin
+# renovate: datasource=github-releases depName=knechtionscoding/helm-schema-gen
+ARG HELM_SCHEMA_GEN_PLUGIN_VERSION=0.0.10
+RUN <<EOF
+helm plugin install --version=v${HELM_SCHEMA_GEN_PLUGIN_VERSION} https://github.com/knechtionscoding/helm-schema-gen
+helm schema-gen --help
+EOF
+
 # Chart Doc Gen
 # renovate: datasource=github-releases depName=kubepack/chart-doc-gen
 ARG CHART_DOC_GEN_VERSION=0.4.7

README.md

@@ -43,6 +43,10 @@ bash-5.1# CHARTS_DIR=samples/charts chart-powerlint.sh
 You can auto-generate and format Markdown docs from the chart's values.yaml using [generate-docs.sh](scripts/generate-docs.sh).
 This scripts uses either `chart-doc-gen` if the chart dir contains a `doc.yaml`, or `helm-docs` if it doesn't.
 
+### Generating Chart Schemas
+
+You can auto-generate the Helm schema from the chart's values.yaml using [generate-schemas.sh](scripts/generate-schemas.sh).
+
 ### Generating CHANGELOG files
 
 Finally, there's [generate-chart-changelog.sh](scripts/generate-chart-changelog.sh), which can be used to generate a CHANGELOG.md file from
@@ -55,6 +59,7 @@ You can use this file in conjunction with the [chart-releaser](https://github.co
 - [kubectl](https://github.com/kubernetes/kubectl)
 - [helm](https://github.com/helm/helm)
 - [helm push plugin](https://github.com/chartmuseum/helm-push.git)
+- [helm schema-gen plugin](https://github.com/knechtionscoding/helm-schema-gen.git)
 - [helm-local-chart-version](https://github.com/mbenabda/helm-local-chart-version)
 - [chart-doc-gen](https://github.com/kubepack/chart-doc-gen)
 - [kubeval](https://github.com/instrumenta/kubeval)

scripts/generate-schemas.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -euox pipefail
+
+echo "Running schema-gen..."
+
+CHARTS_DIR=${CHARTS_DIR:-"charts"}
+
+for chart in "${CHARTS_DIR}"/*; do
+  echo "Generating schema for $chart:"
+
+  if test ! -f "${chart}/Chart.yaml"; then
+    echo "No 'Chart.yaml' found in directory ${chart}. Skipping."
+    continue
+  fi
+
+  helm schema-gen ${chart}/values.yaml > ${chart}/values.schema.json
+
+done