Only build varlink when buildtag is available

Correct mistake that broke things like dlv where we should only
try to add the varlink command to podman when the 'varlink' build
tag is present.

Signed-off-by: baude <bbaude@redhat.com>

cmd/podman/commands.go

@@ -42,10 +42,13 @@ func getMainCommands() []*cobra.Command {
 		_topCommand,
 		_umountCommand,
 		_unpauseCommand,
-		_varlinkCommand,
 		volumeCommand.Command,
 		_waitCommand,
 	}
+
+	if len(_varlinkCommand.Use) > 0 {
+		rootCommands = append(rootCommands, _varlinkCommand)
+	}
 	return rootCommands
 }
 

cmd/podman/varlink_dummy.go

@@ -2,8 +2,10 @@
 
 package main
 
-import (
-	"github.com/containers/libpod/cmd/podman/cliconfig"
-)
+import "github.com/spf13/cobra"
 
-var varlinkCommand *cliconfig.PodmanCommand
+var (
+	_varlinkCommand = &cobra.Command{
+		Use: "",
+	}
+)