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// Copyright 2015 The appc 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 acirenderer
import (
"container/list"
"github.com/appc/spec/schema/types"
)
// CreateDepListFromImageID returns the flat dependency tree of the image with
// the provided imageID
func CreateDepListFromImageID(imageID types.Hash, ap ACIRegistry) (Images, error) {
key, err := ap.ResolveKey(imageID.String())
if err != nil {
return nil, err
}
return createDepList(key, ap)
}
// CreateDepListFromNameLabels returns the flat dependency tree of the image
// with the provided app name and optional labels.
func CreateDepListFromNameLabels(name types.ACIdentifier, labels types.Labels, ap ACIRegistry) (Images, error) {
key, err := ap.GetACI(name, labels)
if err != nil {
return nil, err
}
return createDepList(key, ap)
}
// createDepList returns the flat dependency tree as a list of Image type
func createDepList(key string, ap ACIRegistry) (Images, error) {
imgsl := list.New()
im, err := ap.GetImageManifest(key)
if err != nil {
return nil, err
}
img := Image{Im: im, Key: key, Level: 0}
imgsl.PushFront(img)
// Create a flat dependency tree. Use a LinkedList to be able to
// insert elements in the list while working on it.
for el := imgsl.Front(); el != nil; el = el.Next() {
img := el.Value.(Image)
dependencies := img.Im.Dependencies
for _, d := range dependencies {
var depimg Image
var depKey string
if d.ImageID != nil && !d.ImageID.Empty() {
depKey, err = ap.ResolveKey(d.ImageID.String())
if err != nil {
return nil, err
}
} else {
var err error
depKey, err = ap.GetACI(d.ImageName, d.Labels)
if err != nil {
return nil, err
}
}
im, err := ap.GetImageManifest(depKey)
if err != nil {
return nil, err
}
depimg = Image{Im: im, Key: depKey, Level: img.Level + 1}
imgsl.InsertAfter(depimg, el)
}
}
imgs := Images{}
for el := imgsl.Front(); el != nil; el = el.Next() {
imgs = append(imgs, el.Value.(Image))
}
return imgs, nil
}
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