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67 lines
2 KiB
Go
67 lines
2 KiB
Go
// +build !windows
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package distribution // import "github.com/docker/docker/distribution"
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import (
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"context"
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"github.com/containerd/containerd/platforms"
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"github.com/docker/distribution"
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"github.com/docker/distribution/manifest/manifestlist"
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specs "github.com/opencontainers/image-spec/specs-go/v1"
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"github.com/sirupsen/logrus"
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)
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func (ld *v2LayerDescriptor) open(ctx context.Context) (distribution.ReadSeekCloser, error) {
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blobs := ld.repo.Blobs(ctx)
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return blobs.Open(ctx, ld.digest)
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}
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func filterManifests(manifests []manifestlist.ManifestDescriptor, p specs.Platform) []manifestlist.ManifestDescriptor {
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p = platforms.Normalize(withDefault(p))
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m := platforms.NewMatcher(p)
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var matches []manifestlist.ManifestDescriptor
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for _, desc := range manifests {
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if m.Match(toOCIPlatform(desc.Platform)) {
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matches = append(matches, desc)
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logrus.Debugf("found match for %s with media type %s, digest %s", platforms.Format(p), desc.MediaType, desc.Digest.String())
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}
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}
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// deprecated: backwards compatibility with older versions that didn't compare variant
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if len(matches) == 0 && p.Architecture == "arm" {
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p = platforms.Normalize(p)
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for _, desc := range manifests {
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if desc.Platform.OS == p.OS && desc.Platform.Architecture == p.Architecture {
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matches = append(matches, desc)
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logrus.Debugf("found deprecated partial match for %s with media type %s, digest %s", platforms.Format(p), desc.MediaType, desc.Digest.String())
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}
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}
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}
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return matches
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}
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// checkImageCompatibility is a Windows-specific function. No-op on Linux
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func checkImageCompatibility(imageOS, imageOSVersion string) error {
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return nil
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}
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func withDefault(p specs.Platform) specs.Platform {
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def := platforms.DefaultSpec()
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if p.OS == "" {
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p.OS = def.OS
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}
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if p.Architecture == "" {
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p.Architecture = def.Architecture
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p.Variant = def.Variant
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}
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return p
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}
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func formatPlatform(platform specs.Platform) string {
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if platform.OS == "" {
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platform = platforms.DefaultSpec()
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}
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return platforms.Format(platform)
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}
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