feat(manager/helmfile): allow forward slashes in OCI chart names

lib/modules/manager/helmfile/extract.spec.ts

@@ -363,6 +363,32 @@ describe('modules/manager/helmfile/extract', () => {
       });
     });
 
+    it('allows OCI chart names containing forward slashes', async () => {
+      const content = `
+      repositories:
+        - name: oci-repo
+          url: ghcr.io/example/oci-repo
+          oci: true
+      releases:
+        - name: nested-example
+          version: 1.2.3
+          chart: oci-repo/nested/path/chart
+      `;
+      const fileName = 'helmfile.yaml';
+      const result = await extractPackageFile(content, fileName, {});
+      expect(result).toMatchObject({
+        datasource: 'helm',
+        deps: [
+          {
+            currentValue: '1.2.3',
+            depName: 'nested/path/chart',
+            datasource: 'docker',
+            packageName: 'ghcr.io/example/oci-repo/nested/path/chart',
+          },
+        ],
+      });
+    });
+
     it('parses a chart with an oci repository with ---', async () => {
       const content = codeBlock`
       repositories:

lib/modules/manager/helmfile/extract.ts

@@ -18,8 +18,13 @@ import {
   localChartHasKustomizationsYaml,
 } from './utils';
 
-const isValidChartName = (name: string | undefined): boolean =>
-  !!name && !regEx(/[!@#$%^&*(),.?":{}/|<>A-Z]/).test(name);
+function isValidChartName(name: string | undefined, oci: boolean): boolean {
+  if (oci) {
+    return !!name && !regEx(/[!@#$%^&*(),.?":{}|<>A-Z]/).test(name);
+  } else {
+    return !!name && !regEx(/[!@#$%^&*(),.?":{}/|<>A-Z]/).test(name);
+  }
+}
 
 function isLocalPath(possiblePath: string): boolean {
   return ['./', '../', '/'].some((localPrefix) =>
@@ -118,7 +123,12 @@ export async function extractPackageFile(
 
       // By definition on helm the chart name should be lowercase letter + number + -
       // However helmfile support templating of that field
-      if (!isValidChartName(res.depName)) {
+      if (
+        !isValidChartName(
+          res.depName,
+          isOCIRegistry(dep.chart) || (registryData[repoName]?.oci ?? false),
+        )
+      ) {
         res.skipReason = 'unsupported-chart-type';
       }