remove.go

// Copyright 2017 VMware, Inc. All Rights Reserved.
//
// 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 task

import (
	"fmt"

	"github.com/vmware/govmomi/vim25/types"
	"github.com/vmware/vic/lib/portlayer/exec"
	"github.com/vmware/vic/pkg/trace"
)

// Remove the task configuration from the containerVM config
func Remove(op *trace.Operation, h interface{}, id string) (interface{}, error) {
	defer trace.End(trace.Begin(id))

	handle, ok := h.(*exec.Handle)
	if !ok {
		return nil, fmt.Errorf("Type assertion failed for %#+v", handle)
	}

	stasks := handle.ExecConfig.Sessions
	etasks := handle.ExecConfig.Execs

	_, okS := stasks[id]
	_, okE := etasks[id]

	if !okS && !okE {
		return nil, fmt.Errorf("unknown task ID: %s", id)
	}

	tasks := stasks
	if handle.Runtime != nil && handle.Runtime.PowerState != types.VirtualMachinePowerStatePoweredOff {
		op.Debugf("Task configuration applies to ephemeral set")
		tasks = etasks

		if err := compatible(h); err != nil {
			return nil, err
		}
	}

	// if no task has been bound to the
	if _, ok := tasks[id]; !ok {
		return nil, fmt.Errorf("Cannot modify task %s in current state", id)
	}

	delete(tasks, id)
	handle.Reload()

	return handle, nil
}