Add podman pod prune

podman system prune would leave pods be, and not prune them if they were stopped.
Fix this by adding a `podman pod prune` command that prunes stopped pods similarly to containers.

Signed-off-by: Peter Hunt <pehunt@redhat.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/cmd/podman/pods_prune.go b/cmd/podman/pods_prune.go
new file mode 100644
index 000000000..4ffe6fc27
--- /dev/null
+++ b/cmd/podman/pods_prune.go
@@ -0,0 +1,91 @@
+package main
+
+import (
+	"context"
+
+	"github.com/containers/libpod/cmd/podman/cliconfig"
+	"github.com/containers/libpod/cmd/podman/shared"
+	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/pkg/adapter"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+var (
+	prunePodsCommand     cliconfig.PrunePodsValues
+	prunePodsDescription = `
+	podman pod prune
+
+	Removes all exited pods
+`
+	_prunePodsCommand = &cobra.Command{
+		Use:   "prune",
+		Args:  noSubArgs,
+		Short: "Remove all stopped pods",
+		Long:  prunePodsDescription,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			prunePodsCommand.InputArgs = args
+			prunePodsCommand.GlobalFlags = MainGlobalOpts
+			return prunePodsCmd(&prunePodsCommand)
+		},
+	}
+)
+
+func init() {
+	prunePodsCommand.Command = _prunePodsCommand
+	prunePodsCommand.SetHelpTemplate(HelpTemplate())
+	prunePodsCommand.SetUsageTemplate(UsageTemplate())
+	flags := prunePodsCommand.Flags()
+	flags.BoolVarP(&prunePodsCommand.Force, "force", "f", false, "Force removal of a running pods.  The default is false")
+}
+
+func prunePods(runtime *adapter.LocalRuntime, ctx context.Context, maxWorkers int, force bool) error {
+	var deleteFuncs []shared.ParallelWorkerInput
+
+	filter := func(p *libpod.Pod) bool {
+		state, err := shared.GetPodStatus(p)
+		// pod states should be the same
+		if state == shared.PodStateStopped || (state == shared.PodStateExited && err == nil) {
+			return true
+		}
+		return false
+	}
+	delPods, err := runtime.Pods(filter)
+	if err != nil {
+		return err
+	}
+	if len(delPods) < 1 {
+		return nil
+	}
+	for _, pod := range delPods {
+		p := pod
+		f := func() error {
+			return runtime.RemovePod(ctx, p, force, force)
+		}
+
+		deleteFuncs = append(deleteFuncs, shared.ParallelWorkerInput{
+			ContainerID:  p.ID(),
+			ParallelFunc: f,
+		})
+	}
+	// Run the parallel funcs
+	deleteErrors, errCount := shared.ParallelExecuteWorkerPool(maxWorkers, deleteFuncs)
+	return printParallelOutput(deleteErrors, errCount)
+}
+
+func prunePodsCmd(c *cliconfig.PrunePodsValues) error {
+	runtime, err := adapter.GetRuntime(&c.PodmanCommand)
+	if err != nil {
+		return errors.Wrapf(err, "could not get runtime")
+	}
+	defer runtime.Shutdown(false)
+
+	maxWorkers := shared.Parallelize("rm")
+	if c.GlobalIsSet("max-workers") {
+		maxWorkers = c.GlobalFlags.MaxWorks
+	}
+	logrus.Debugf("Setting maximum workers to %d", maxWorkers)
+
+	return prunePods(runtime, getContext(), maxWorkers, c.Bool("force"))
+}