Move runc shim code into common package

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

runtime/v2/runc/util.go

@@ -0,0 +1,55 @@
+// +build linux
+
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package runc
+
+import (
+	"github.com/containerd/containerd/api/events"
+	"github.com/containerd/containerd/runtime"
+	"github.com/sirupsen/logrus"
+)
+
+// GetTopic converts an event from an interface type to the specific
+// event topic id
+func GetTopic(e interface{}) string {
+	switch e.(type) {
+	case *events.TaskCreate:
+		return runtime.TaskCreateEventTopic
+	case *events.TaskStart:
+		return runtime.TaskStartEventTopic
+	case *events.TaskOOM:
+		return runtime.TaskOOMEventTopic
+	case *events.TaskExit:
+		return runtime.TaskExitEventTopic
+	case *events.TaskDelete:
+		return runtime.TaskDeleteEventTopic
+	case *events.TaskExecAdded:
+		return runtime.TaskExecAddedEventTopic
+	case *events.TaskExecStarted:
+		return runtime.TaskExecStartedEventTopic
+	case *events.TaskPaused:
+		return runtime.TaskPausedEventTopic
+	case *events.TaskResumed:
+		return runtime.TaskResumedEventTopic
+	case *events.TaskCheckpointed:
+		return runtime.TaskCheckpointedEventTopic
+	default:
+		logrus.Warnf("no topic for type %#v", e)
+	}
+	return runtime.TaskUnknownTopic
+}