cmd/create, pkg/utils: Simplify hint after creating a container

A subsequent commit will add support for configuration files, which can
override the default toolbox image. Since this override affects all
commands, it effectively ends up adding a fourth option to the 'enter'
command, other than the existing options to change the distribution,
release and container. This makes it a lot more difficult to reason
when only 'toolbox enter --release N' is enough to enter the created
container.

https://github.com/containers/toolbox/pull/828
https://github.com/containers/toolbox/pull/851

src/cmd/create.go

@@ -178,7 +178,7 @@ func createContainer(container, image, release string, showCommandToEnter bool)
 		panic("release not specified")
 	}
 
-	enterCommand := getEnterCommand(container, release)
+	enterCommand := getEnterCommand(container)
 
 	logrus.Debugf("Checking if container %s already exists", container)
 
@@ -503,15 +503,12 @@ func getDBusSystemSocket() (string, error) {
 	return pathEvaled, nil
 }
 
-func getEnterCommand(container, release string) string {
+func getEnterCommand(container string) string {
 	var enterCommand string
-	containerNamePrefixDefaultWithRelease := utils.ContainerNamePrefixDefault + "-" + release
 
 	switch container {
 	case utils.ContainerNameDefault:
 		enterCommand = fmt.Sprintf("%s enter", executableBase)
-	case containerNamePrefixDefaultWithRelease:
-		enterCommand = fmt.Sprintf("%s enter --release %s", executableBase, release)
 	default:
 		enterCommand = fmt.Sprintf("%s enter %s", executableBase, container)
 	}

src/pkg/utils/utils.go

@@ -61,6 +61,8 @@ const (
 )
 
 var (
+	containerNamePrefixDefault = "fedora-toolbox"
+
 	distroDefault = "fedora"
 
 	preservedEnvironmentVariables = []string{
@@ -112,8 +114,7 @@ var (
 )
 
 var (
-	ContainerNameDefault       string
-	ContainerNamePrefixDefault = "fedora-toolbox"
+	ContainerNameDefault string
 )
 
 func init() {
@@ -124,14 +125,14 @@ func init() {
 		if distroObj, supportedDistro := supportedDistros[hostID]; supportedDistro {
 			release, err := GetHostVersionID()
 			if err == nil {
-				ContainerNamePrefixDefault = distroObj.ContainerNamePrefix
+				containerNamePrefixDefault = distroObj.ContainerNamePrefix
 				distroDefault = hostID
 				releaseDefault = release
 			}
 		}
 	}
 
-	ContainerNameDefault = ContainerNamePrefixDefault + "-" + releaseDefault
+	ContainerNameDefault = containerNamePrefixDefault + "-" + releaseDefault
 }
 
 func AskForConfirmation(prompt string) bool {

test/system/101-create.bats

@@ -62,7 +62,7 @@ teardown() {
 
   assert_success
   assert_output --partial "Created container: fedora-toolbox-32"
-  assert_output --partial "Enter with: toolbox enter --release 32"
+  assert_output --partial "Enter with: toolbox enter fedora-toolbox-32"
 
   # Make sure the container has actually been created
   run podman ps -a