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described_reader.go
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/
described_reader.go
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// Copyright 2024 The Carvel Authors.
// SPDX-License-Identifier: Apache-2.0
package imagedesc
import (
regv1 "github.com/google/go-containerregistry/pkg/v1"
)
type DescribedReader struct {
ids *ImageRefDescriptors
layerProvider LayerProvider
}
func NewDescribedReader(ids *ImageRefDescriptors, layerProvider LayerProvider) DescribedReader {
return DescribedReader{ids, layerProvider}
}
func (r DescribedReader) Read() []ImageOrIndex {
var result []ImageOrIndex
for _, td := range r.ids.Descriptors() {
switch {
case td.Image != nil:
var img ImageWithRef = NewDescribedImage(*td.Image, r.layerProvider)
result = append(result, ImageOrIndex{Image: &img, Labels: td.Image.Labels, OrigRef: td.OrigRef()})
case td.ImageIndex != nil:
idx := r.buildIndex(*td.ImageIndex)
result = append(result, ImageOrIndex{Index: &idx, Labels: td.ImageIndex.Labels, OrigRef: td.OrigRef()})
default:
panic("Unknown item")
}
}
return result
}
func (r DescribedReader) buildIndex(iitd ImageIndexDescriptor) ImageIndexWithRef {
var images []regv1.Image
var indexes []regv1.ImageIndex
for _, imgTD := range iitd.Images {
images = append(images, NewDescribedImage(imgTD, r.layerProvider))
}
for _, indexTD := range iitd.Indexes {
indexes = append(indexes, r.buildIndex(indexTD))
}
return NewDescribedImageIndex(iitd, images, indexes)
}