Add ability to adopt unmanaged resources

(cherry picked from commit 93bf18c7aabc3bfbd494fd2503b08a1e77ac71e8)

pkg/action/install.go

@@ -71,6 +71,7 @@ type Install struct {
 
 	ClientOnly      bool
 	Force           bool
+	ForceAdopt      bool
 	CreateNamespace bool
 	DryRun          bool
 	DryRunOption    string
@@ -350,7 +351,7 @@ func (i *Install) RunWithContext(ctx context.Context, chrt *chart.Chart, vals ma
 		if i.TakeOwnership {
 			toBeAdopted, err = requireAdoption(resources)
 		} else {
-			toBeAdopted, err = existingResourceConflict(resources, rel.Name, rel.Namespace)
+			toBeAdopted, err = existingResourceConflict(resources, rel.Name, rel.Namespace, i.ForceAdopt)
 		}
 		if err != nil {
 			return nil, errors.Wrap(err, "Unable to continue with install")

pkg/action/upgrade.go

@@ -46,6 +46,7 @@ type Upgrade struct {
 
 	ChartPathOptions
 
+	Adopt bool
 	// Install is a purely informative flag that indicates whether this upgrade was done in "install" mode.
 	//
 	// Applications may use this to determine whether this Upgrade operation was done as part of a
@@ -347,7 +348,7 @@ func (u *Upgrade) performUpgrade(ctx context.Context, originalRelease, upgradedR
 	if u.TakeOwnership {
 		toBeUpdated, err = requireAdoption(toBeCreated)
 	} else {
-		toBeUpdated, err = existingResourceConflict(toBeCreated, upgradedRelease.Name, upgradedRelease.Namespace)
+		toBeUpdated, err = existingResourceConflict(toBeCreated, upgradedRelease.Name, upgradedRelease.Namespace, u.Adopt)
 	}
 	if err != nil {
 		return nil, errors.Wrap(err, "Unable to continue with update")

pkg/action/validate.go

@@ -62,7 +62,7 @@ func requireAdoption(resources kube.ResourceList) (kube.ResourceList, error) {
 	return requireUpdate, err
 }
 
-func existingResourceConflict(resources kube.ResourceList, releaseName, releaseNamespace string) (kube.ResourceList, error) {
+func existingResourceConflict(resources kube.ResourceList, releaseName, releaseNamespace string, forceAdopt bool) (kube.ResourceList, error) {
 	var requireUpdate kube.ResourceList
 
 	err := resources.Visit(func(info *resource.Info, err error) error {
@@ -79,10 +79,12 @@ func existingResourceConflict(resources kube.ResourceList, releaseName, releaseN
 			return errors.Wrapf(err, "could not get information about the resource %s", resourceString(info))
 		}
 
+		if !forceAdopt {
 			// Allow adoption of the resource if it is managed by Helm and is annotated with correct release name and namespace.
 			if err := checkOwnership(existing, releaseName, releaseNamespace); err != nil {
 				return fmt.Errorf("%s exists and cannot be imported into the current release: %s", resourceString(info), err)
 			}
+		}
 
 		requireUpdate.Append(info)
 		return nil