Repeat system pruning until there is nothing removed

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

6 files changed, 29 insertions, 18 deletions

diff --git a/cmd/podman/containers/prune.go b/cmd/podman/containers/prune.go
index 9ac529b1c..d3842778b 100644
--- a/cmd/podman/containers/prune.go
+++ b/cmd/podman/containers/prune.go
@@ -78,5 +78,5 @@ func prune(cmd *cobra.Command, args []string) error {
 	if err != nil {
 		return err
 	}
-	return utils.PrintContainerPruneResults(responses)
+	return utils.PrintContainerPruneResults(responses, false)
 }
diff --git a/cmd/podman/images/prune.go b/cmd/podman/images/prune.go
index e68fe5f40..268a68681 100644
--- a/cmd/podman/images/prune.go
+++ b/cmd/podman/images/prune.go
@@ -71,5 +71,5 @@ Are you sure you want to continue? [y/N] `)
 		return err
 	}
 
-	return utils.PrintImagePruneResults(results)
+	return utils.PrintImagePruneResults(results, false)
 }
diff --git a/cmd/podman/pods/prune.go b/cmd/podman/pods/prune.go
index 444b0f5e0..e069c9b7f 100644
--- a/cmd/podman/pods/prune.go
+++ b/cmd/podman/pods/prune.go
@@ -60,5 +60,5 @@ func prune(cmd *cobra.Command, args []string) error {
 	if err != nil {
 		return err
 	}
-	return utils.PrintPodPruneResults(responses)
+	return utils.PrintPodPruneResults(responses, false)
 }
diff --git a/cmd/podman/system/prune.go b/cmd/podman/system/prune.go
index f2b9a3db5..f57689584 100644
--- a/cmd/podman/system/prune.go
+++ b/cmd/podman/system/prune.go
@@ -73,32 +73,31 @@ Are you sure you want to continue? [y/N] `, volumeString)
 			return nil
 		}
 	}
+
 	// TODO: support for filters in system prune
 	response, err := registry.ContainerEngine().SystemPrune(context.Background(), pruneOptions)
 	if err != nil {
 		return err
 	}
-	// Print pod prune results
-	fmt.Println("Deleted Pods")
-	err = utils.PrintPodPruneResults(response.PodPruneReport)
+	// Print container prune results
+	err = utils.PrintContainerPruneResults(response.ContainerPruneReport, true)
 	if err != nil {
 		return err
 	}
-	// Print container prune results
-	fmt.Println("Deleted Containers")
-	err = utils.PrintContainerPruneResults(response.ContainerPruneReport)
+	// Print pod prune results
+	err = utils.PrintPodPruneResults(response.PodPruneReport, true)
 	if err != nil {
 		return err
 	}
 	// Print Volume prune results
 	if pruneOptions.Volume {
-		fmt.Println("Deleted Volumes")
-		err = utils.PrintVolumePruneResults(response.VolumePruneReport)
+		err = utils.PrintVolumePruneResults(response.VolumePruneReport, true)
 		if err != nil {
 			return err
 		}
 	}
 	// Print Images prune results
-	fmt.Println("Deleted Images")
-	return utils.PrintImagePruneResults(response.ImagePruneReport)
+	utils.PrintImagePruneResults(response.ImagePruneReport, true)
+
+	return nil
 }
diff --git a/cmd/podman/utils/utils.go b/cmd/podman/utils/utils.go
index 1c9e4d786..2ca2c4c92 100644
--- a/cmd/podman/utils/utils.go
+++ b/cmd/podman/utils/utils.go
@@ -26,8 +26,11 @@ func FileExists(path string) bool {
 	return !file.IsDir()
 }
 
-func PrintPodPruneResults(podPruneReports []*entities.PodPruneReport) error {
+func PrintPodPruneResults(podPruneReports []*entities.PodPruneReport, heading bool) error {
 	var errs OutputErrors
+	if heading && len(podPruneReports) > 0 {
+		fmt.Println("Deleted Pods")
+	}
 	for _, r := range podPruneReports {
 		if r.Err == nil {
 			fmt.Println(r.Id)
@@ -38,8 +41,11 @@ func PrintPodPruneResults(podPruneReports []*entities.PodPruneReport) error {
 	return errs.PrintErrors()
 }
 
-func PrintContainerPruneResults(containerPruneReport *entities.ContainerPruneReport) error {
+func PrintContainerPruneResults(containerPruneReport *entities.ContainerPruneReport, heading bool) error {
 	var errs OutputErrors
+	if heading && (len(containerPruneReport.ID) > 0 || len(containerPruneReport.Err) > 0) {
+		fmt.Println("Deleted Containers")
+	}
 	for k := range containerPruneReport.ID {
 		fmt.Println(k)
 	}
@@ -49,8 +55,11 @@ func PrintContainerPruneResults(containerPruneReport *entities.ContainerPruneRep
 	return errs.PrintErrors()
 }
 
-func PrintVolumePruneResults(volumePruneReport []*entities.VolumePruneReport) error {
+func PrintVolumePruneResults(volumePruneReport []*entities.VolumePruneReport, heading bool) error {
 	var errs OutputErrors
+	if heading && len(volumePruneReport) > 0 {
+		fmt.Println("Deleted Volumes")
+	}
 	for _, r := range volumePruneReport {
 		if r.Err == nil {
 			fmt.Println(r.Id)
@@ -61,7 +70,10 @@ func PrintVolumePruneResults(volumePruneReport []*entities.VolumePruneReport) er
 	return errs.PrintErrors()
 }
 
-func PrintImagePruneResults(imagePruneReport *entities.ImagePruneReport) error {
+func PrintImagePruneResults(imagePruneReport *entities.ImagePruneReport, heading bool) error {
+	if heading && (len(imagePruneReport.Report.Id) > 0 || len(imagePruneReport.Report.Err) > 0) {
+		fmt.Println("Deleted Images")
+	}
 	for _, i := range imagePruneReport.Report.Id {
 		fmt.Println(i)
 	}
diff --git a/cmd/podman/volumes/prune.go b/cmd/podman/volumes/prune.go
index 4c2136dcf..d1370120b 100644
--- a/cmd/podman/volumes/prune.go
+++ b/cmd/podman/volumes/prune.go
@@ -62,5 +62,5 @@ func prune(cmd *cobra.Command, args []string) error {
 	if err != nil {
 		return err
 	}
-	return utils.PrintVolumePruneResults(responses)
+	return utils.PrintVolumePruneResults(responses, false)
 }