podman system prune support prune unused networks

This is an enhancement for the podman system prune feature.

In this issue, it is mentioned that 'network prune' should be
wired into 'podman system prune'
https://github.com/containers/podman/issues/8673

Therefore, I add the function to remove unused networks.

Signed-off-by: Toshiki Sonoda <sonoda.toshiki@fujitsu.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/cmd/podman/utils/utils.go b/cmd/podman/utils/utils.go
index 6fd6647d0..73bb34983 100644
--- a/cmd/podman/utils/utils.go
+++ b/cmd/podman/utils/utils.go
@@ -84,3 +84,18 @@ func PrintImagePruneResults(imagePruneReports []*reports.PruneReport, heading bo
 
 	return nil
 }
+
+func PrintNetworkPruneResults(networkPruneReport []*reports.PruneReport, heading bool) error {
+	var errs OutputErrors
+	if heading && len(networkPruneReport) > 0 {
+		fmt.Println("Deleted Networks")
+	}
+	for _, r := range networkPruneReport {
+		if r.Err == nil {
+			fmt.Println(r.Id)
+		} else {
+			errs = append(errs, r.Err)
+		}
+	}
+	return errs.PrintErrors()
+}