Add --replace flag to "podman container runlabel"

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1677908

Signed-off-by: Jhon Honce <jhonce@redhat.com>

cmd/podman/cliconfig/config.go

@@ -416,14 +416,15 @@ type RmiValues struct {
 type RunlabelValues struct {
 	PodmanCommand
 	Authfile        string
-	Display         bool
 	CertDir         string
 	Creds           string
+	Display         bool
 	Name            string
 	Opt1            string
 	Opt2            string
 	Opt3            string
 	Quiet           bool
+	Replace         bool
 	SignaturePolicy string
 	TlsVerify       bool
 }

cmd/podman/runlabel.go

@@ -10,9 +10,11 @@ import (
 	"github.com/containers/libpod/cmd/podman/cliconfig"
 	"github.com/containers/libpod/cmd/podman/libpodruntime"
 	"github.com/containers/libpod/cmd/podman/shared"
+	"github.com/containers/libpod/libpod"
 	"github.com/containers/libpod/libpod/image"
 	"github.com/containers/libpod/utils"
 	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
@@ -45,6 +47,7 @@ func init() {
 	flags.StringVar(&runlabelCommand.CertDir, "cert-dir", "", "`Pathname` of a directory containing TLS certificates and keys")
 	flags.StringVar(&runlabelCommand.Creds, "creds", "", "`Credentials` (USERNAME:PASSWORD) to use for authenticating to a registry")
 	flags.BoolVar(&runlabelCommand.Display, "display", false, "Preview the command that the label would run")
+	flags.BoolVar(&runlabelCommand.Replace, "replace", false, "Replace existing container with a new one from the image")
 	flags.StringVar(&runlabelCommand.Name, "name", "", "Assign a name to the container")
 
 	flags.StringVar(&runlabelCommand.Opt1, "opt1", "", "Optional parameter to pass for install")
@@ -146,10 +149,33 @@ func runlabelCmd(c *cliconfig.RunlabelValues) error {
 		return err
 	}
 	if !c.Quiet {
-		fmt.Printf("Command: %s\n", strings.Join(cmd, " "))
+		fmt.Printf("command: %s\n", strings.Join(cmd, " "))
 		if c.Display {
 			return nil
 		}
 	}
+
+	// If container already exists && --replace given -- Nuke it
+	if c.Replace {
+		for i, entry := range cmd {
+			if entry == "--name" {
+				name := cmd[i+1]
+				ctr, err := runtime.LookupContainer(name)
+				if err != nil {
+					if errors.Cause(err) != libpod.ErrNoSuchCtr {
+						logrus.Debugf("Error occurred searching for container %s: %s", name, err.Error())
+						return err
+					}
+				} else {
+					logrus.Debugf("Runlabel --replace option given. Container %s will be deleted. The new container will be named %s", ctr.ID(), name)
+					if err := runtime.RemoveContainer(ctx, ctr, true, false); err != nil {
+						return err
+					}
+				}
+				break
+			}
+		}
+	}
+
 	return utils.ExecCmdWithStdStreams(stdIn, stdOut, stdErr, env, cmd[0], cmd[1:]...)
 }

completions/bash/podman

@@ -2469,6 +2469,7 @@ _podman_container_runlabel() {
 	 -h
 	 -q
 	 --quiet
+	 --replace
 	 --tls-verify
   "
 

docs/podman-container-runlabel.1.md

@@ -12,6 +12,7 @@ podman-container-runlabel - Execute Image Label Method
 [**--rootfs**=*ROOTFS*]
 [**--set**=*NAME*=*VALUE*]
 [**--storage**]
+[**--replace**]
 LABEL IMAGE [ARG...]
 
 # DESCRIPTION
@@ -85,6 +86,11 @@ Print usage statement
 
 Suppress output information when pulling images
 
+**--replace**
+
+If a container exists of the default or given name, as needed it will be stopped, deleted and a new container will be
+created from this image.
+
 **--signature-policy="PATHNAME"**
 
 Pathname of a signature policy file to use.  It is not recommended that this