Rename gotk binary to flux

Signed-off-by: Hidde Beydals <hello@hidde.co>

cmd/flux/uninstall.go

@@ -0,0 +1,169 @@
+/*
+Copyright 2020 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"
+	"fmt"
+
+	"github.com/manifoldco/promptui"
+	"github.com/spf13/cobra"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/types"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
+	helmv2 "github.com/fluxcd/helm-controller/api/v2beta1"
+	kustomizev1 "github.com/fluxcd/kustomize-controller/api/v1beta1"
+	sourcev1 "github.com/fluxcd/source-controller/api/v1beta1"
+	"github.com/fluxcd/toolkit/internal/utils"
+)
+
+var uninstallCmd = &cobra.Command{
+	Use:   "uninstall",
+	Short: "Uninstall the toolkit components",
+	Long:  "The uninstall command removes the namespace, cluster roles, cluster role bindings and CRDs from the cluster.",
+	Example: `  # Dry-run uninstall of all components
+  flux uninstall --dry-run --namespace=flux-system
+
+  # Uninstall all components and delete custom resource definitions
+  flux uninstall --resources --crds --namespace=flux-system
+`,
+	RunE: uninstallCmdRun,
+}
+
+var (
+	uninstallCRDs      bool
+	uninstallResources bool
+	uninstallDryRun    bool
+	uninstallSilent    bool
+)
+
+func init() {
+	uninstallCmd.Flags().BoolVar(&uninstallResources, "resources", true,
+		"removes custom resources such as Kustomizations, GitRepositories and HelmRepositories")
+	uninstallCmd.Flags().BoolVar(&uninstallCRDs, "crds", false,
+		"removes all CRDs previously installed")
+	uninstallCmd.Flags().BoolVar(&uninstallDryRun, "dry-run", false,
+		"only print the object that would be deleted")
+	uninstallCmd.Flags().BoolVarP(&uninstallSilent, "silent", "s", false,
+		"delete components without asking for confirmation")
+
+	rootCmd.AddCommand(uninstallCmd)
+}
+
+func uninstallCmdRun(cmd *cobra.Command, args []string) error {
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+
+	kubeClient, err := utils.KubeClient(kubeconfig)
+	if err != nil {
+		return err
+	}
+
+	if !uninstallDryRun && !uninstallSilent {
+		prompt := promptui.Prompt{
+			Label:     fmt.Sprintf("Are you sure you want to delete the %s namespace", namespace),
+			IsConfirm: true,
+		}
+		if _, err := prompt.Run(); err != nil {
+			return fmt.Errorf("aborting")
+		}
+	}
+
+	dryRun := "--dry-run=server"
+	deleteResources := uninstallResources || uninstallCRDs
+
+	// known kinds with finalizers
+	namespacedKinds := []string{
+		sourcev1.GitRepositoryKind,
+		sourcev1.HelmRepositoryKind,
+		sourcev1.BucketKind,
+	}
+
+	// suspend bootstrap kustomization to avoid finalizers deadlock
+	kustomizationName := types.NamespacedName{
+		Namespace: namespace,
+		Name:      namespace,
+	}
+	var kustomization kustomizev1.Kustomization
+	err = kubeClient.Get(ctx, kustomizationName, &kustomization)
+	if err == nil {
+		kustomization.Spec.Suspend = true
+		if err := kubeClient.Update(ctx, &kustomization); err != nil {
+			return fmt.Errorf("unable to suspend kustomization '%s': %w", kustomizationName.String(), err)
+		}
+	}
+	if err == nil || apierrors.IsNotFound(err) {
+		namespacedKinds = append(namespacedKinds, kustomizev1.KustomizationKind)
+	}
+
+	// add HelmRelease kind to deletion list if exists
+	var list helmv2.HelmReleaseList
+	if err := kubeClient.List(ctx, &list, client.InNamespace(namespace)); err == nil {
+		namespacedKinds = append(namespacedKinds, helmv2.HelmReleaseKind)
+	}
+
+	if deleteResources {
+		logger.Actionf("uninstalling custom resources")
+		for _, kind := range namespacedKinds {
+			if err := deleteAll(ctx, kind, uninstallDryRun); err != nil {
+				logger.Failuref("kubectl: %s", err.Error())
+			}
+		}
+	}
+
+	var kinds []string
+	if uninstallCRDs {
+		kinds = append(kinds, "crds")
+	}
+
+	kinds = append(kinds, "clusterroles,clusterrolebindings", "namespace")
+
+	logger.Actionf("uninstalling components")
+
+	for _, kind := range kinds {
+		kubectlArgs := []string{
+			"delete", kind,
+			"-l", fmt.Sprintf("app.kubernetes.io/instance=%s", namespace),
+			"--ignore-not-found", "--timeout", timeout.String(),
+		}
+		if uninstallDryRun {
+			kubectlArgs = append(kubectlArgs, dryRun)
+		}
+		if _, err := utils.ExecKubectlCommand(ctx, utils.ModeOS, kubectlArgs...); err != nil {
+			return fmt.Errorf("uninstall failed: %w", err)
+		}
+	}
+
+	logger.Successf("uninstall finished")
+	return nil
+}
+
+func deleteAll(ctx context.Context, kind string, dryRun bool) error {
+	kubectlArgs := []string{
+		"delete", kind, "--ignore-not-found",
+		"--all", "--all-namespaces",
+		"--timeout", timeout.String(),
+	}
+
+	if dryRun {
+		kubectlArgs = append(kubectlArgs, "--dry-run=server")
+	}
+
+	_, err := utils.ExecKubectlCommand(ctx, utils.ModeOS, kubectlArgs...)
+	return err
+}