Use dedicated type for Container State

Co-authored-by: Sebastiaan van Stijn <[email protected]>
Signed-off-by: Renaud Gaubert <[email protected]>

Author: Renaud Gaubert

specs-go/state.go

@@ -1,18 +1,21 @@
 package specs
 
+// ContainerState represents the state of a container.
+type ContainerState string
+
 const (
 	// StateCreating indicates that the container is being created
-	StateCreating = "creating"
+	StateCreating ContainerState  = "creating"
 
 	// StateCreated indicates that the runtime has finished the create operation
-	StateCreated = "created"
+	StateCreated ContainerState  = "created"
 
 	// StateRunning indicates that the container process has executed the
 	// user-specified program but has not exited
-	StateRunning = "running"
+	StateRunning ContainerState  = "running"
 
 	// StateStopped indicates that the container process has exited
-	StateStopped = "stopped"
+	StateStopped ContainerState  = "stopped"
 )
 
 // State holds information about the runtime state of the container.