Add `tree artifact generator` command

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

cmd/flux/tree_artifact.go

@@ -0,0 +1,31 @@
+/*
+Copyright 2025 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"github.com/spf13/cobra"
+)
+
+var treeArtifactCmd = &cobra.Command{
+	Use:   "artifact",
+	Short: "Print artifact objects reconciled by Flux",
+	Long:  `The tree artifact sub-commands print a list of artifact objects.`,
+}
+
+func init() {
+	treeCmd.AddCommand(treeArtifactCmd)
+}

cmd/flux/tree_artifact_generator.go

@@ -0,0 +1,115 @@
+/*
+Copyright 2025 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/yaml"
+
+	"github.com/fluxcd/cli-utils/pkg/object"
+	sourcev1 "github.com/fluxcd/source-controller/api/v1"
+	swapi "github.com/fluxcd/source-watcher/api/v2/v1beta1"
+
+	"github.com/fluxcd/flux2/v2/internal/tree"
+	"github.com/fluxcd/flux2/v2/internal/utils"
+)
+
+var treeArtifactGeneratorCmd = &cobra.Command{
+	Use:   "generator [name]",
+	Short: "Print the inventory of an ArtifactGenerator",
+	Long:  withPreviewNote(`The tree command prints the ExternalArtifact list managed by an ArtifactGenerator.'`),
+	Example: `  # Print the ExternalArtifacts managed by an ArtifactGenerator
+  flux tree artifact generator my-generator`,
+	RunE:              treeArtifactGeneratorCmdRun,
+	Args:              cobra.ExactArgs(1),
+	ValidArgsFunction: resourceNamesCompletionFunc(swapi.GroupVersion.WithKind(swapi.ArtifactGeneratorKind)),
+}
+
+type TreeArtifactGeneratorFlags struct {
+	output string
+}
+
+var treeArtifactGeneratorArgs TreeArtifactGeneratorFlags
+
+func init() {
+	treeArtifactGeneratorCmd.Flags().StringVarP(&treeArtifactGeneratorArgs.output, "output", "o", "",
+		"the format in which the tree should be printed. can be 'json' or 'yaml'")
+	treeArtifactCmd.AddCommand(treeArtifactGeneratorCmd)
+}
+
+func treeArtifactGeneratorCmdRun(cmd *cobra.Command, args []string) error {
+	if len(args) < 1 {
+		return fmt.Errorf("generator name is required")
+	}
+	name := args[0]
+
+	ctx, cancel := context.WithTimeout(context.Background(), rootArgs.timeout)
+	defer cancel()
+
+	kubeClient, err := utils.KubeClient(kubeconfigArgs, kubeclientOptions)
+	if err != nil {
+		return err
+	}
+
+	ag := &swapi.ArtifactGenerator{}
+	err = kubeClient.Get(ctx, client.ObjectKey{
+		Namespace: *kubeconfigArgs.Namespace,
+		Name:      name,
+	}, ag)
+	if err != nil {
+		return err
+	}
+
+	kTree := tree.New(object.ObjMetadata{
+		Namespace: ag.Namespace,
+		Name:      ag.Name,
+		GroupKind: schema.GroupKind{Group: swapi.GroupVersion.Group, Kind: swapi.ArtifactGeneratorKind},
+	})
+
+	for _, ea := range ag.Status.Inventory {
+		kTree.Add(object.ObjMetadata{
+			Namespace: ea.Namespace,
+			Name:      ea.Name,
+			GroupKind: schema.GroupKind{Group: sourcev1.GroupVersion.Group, Kind: sourcev1.ExternalArtifactKind},
+		})
+	}
+
+	switch treeArtifactGeneratorArgs.output {
+	case "json":
+		data, err := json.MarshalIndent(kTree, "", "  ")
+		if err != nil {
+			return err
+		}
+		rootCmd.Println(string(data))
+	case "yaml":
+		data, err := yaml.Marshal(kTree)
+		if err != nil {
+			return err
+		}
+		rootCmd.Println(string(data))
+	default:
+		rootCmd.Println(kTree.Print())
+	}
+
+	return nil
+}