[Feature] Chart By Tag filter (#1958)

Author: ajanikow

CHANGELOG.md

@@ -6,6 +6,7 @@
 - (Feature) Helm Lint
 - (Bugfix) Helm Lint Indent fix
 - (Feature) Add CA Certificates
+- (Feature) Chart By Tag filter
 
 ## [1.3.0](https://github.com/arangodb/kube-arangodb/tree/1.3.0) (2025-08-01)
 - (Feature) (Platform) Storage Debug

pkg/util/constants/helm.go

@@ -34,4 +34,6 @@ const (
 
 	// HelmLabelArangoDBType set to platform or service
 	HelmLabelArangoDBType = HelmLabelInstallationBase + "/type"
+
+	HelmLabelTag = HelmLabelBase + "/tag"
 )

pkg/util/k8sutil/helm/chart_manager_repo.go

@@ -25,12 +25,16 @@ import (
 	"sort"
 
 	"helm.sh/helm/v3/pkg/repo"
+
+	"github.com/arangodb/kube-arangodb/pkg/util"
+	utilConstants "github.com/arangodb/kube-arangodb/pkg/util/constants"
 )
 
 type ChartManagerRepo interface {
 	Versions() []string
 
 	Get(version string) (ChartManagerRepoVersion, bool)
+	GetByTag(version string) (ChartManagerRepoVersion, bool)
 	Latest() (ChartManagerRepoVersion, bool)
 }
 
@@ -63,6 +67,34 @@ func (c chartManagerRepo) Versions() []string {
 	return s
 }
 
+func (c chartManagerRepo) GetByTag(version string) (ChartManagerRepoVersion, bool) {
+	r, ok := c.manager.index.Entries[c.name]
+	if !ok {
+		return nil, false
+	}
+
+	r = util.FilterList(r, func(v *repo.ChartVersion) bool {
+		if v, ok := v.Annotations[utilConstants.HelmLabelTag]; ok && v == version {
+			return true
+		}
+		return false
+	})
+
+	r = util.Sort(r, func(i, j *repo.ChartVersion) bool {
+		return i.Created.After(j.Created)
+	})
+
+	if len(r) == 0 {
+		return nil, false
+	}
+
+	return chartManagerRepoVersion{
+		version: r[0].Version,
+		manager: c.manager,
+		chart:   r[0],
+	}, true
+}
+
 func (c chartManagerRepo) Get(version string) (ChartManagerRepoVersion, bool) {
 	if version == "latest" {
 		return c.Latest()

pkg/util/k8sutil/helm/chart_manager_test.go

@@ -92,3 +92,13 @@ func Test_Manager(t *testing.T) {
 
 	require.NoError(t, mgr.Reload(context.Background()))
 }
+
+func Test_Manager_Tag(t *testing.T) {
+	mgr, err := NewChartManager(context.Background(), nil, "https://arangodb-platform-dev-chart-registry.s3.amazonaws.com/index.yaml")
+	require.NoError(t, err)
+
+	repo, ok := mgr.Get("platform_test_example")
+	require.True(t, ok)
+
+	repo.GetByTag("dev")
+}