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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| package artifact | ||
|
|
||
| type Config interface { | ||
| ArtifactType() (string, error) | ||
| ConfigMediaType() (string, error) | ||
| RawConfigFile() ([]byte, error) | ||
| } | ||
|
|
||
| func EmptyConfig(artifactType string) Config { | ||
| return &emptyConfigArtifact{ | ||
| artifactType: artifactType, | ||
| } | ||
| } | ||
|
|
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| type emptyConfigArtifact struct { | ||
| artifactType string | ||
| } | ||
|
|
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| func (i *emptyConfigArtifact) ArtifactType() (string, error) { | ||
| return i.artifactType, nil | ||
| } | ||
|
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| func (i *emptyConfigArtifact) ConfigMediaType() (string, error) { | ||
| return "application/vnd.oci.empty.v1+json", nil | ||
| } | ||
|
|
||
| func (i *emptyConfigArtifact) RawConfigFile() ([]byte, error) { | ||
| return []byte("{}"), nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,148 @@ | ||
| package artifact | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "sync/atomic" | ||
|
|
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| v1 "github.com/google/go-containerregistry/pkg/v1" | ||
| "github.com/google/go-containerregistry/pkg/v1/partial" | ||
| "github.com/google/go-containerregistry/pkg/v1/types" | ||
| "github.com/opencontainers/go-digest" | ||
| specv1 "github.com/opencontainers/image-spec/specs-go/v1" | ||
| ) | ||
|
|
||
| func Artifact(img v1.Image, c Config) (v1.Image, error) { | ||
| return &artifactImage{ | ||
| Image: img, | ||
| config: c, | ||
| }, nil | ||
| } | ||
|
|
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| type artifactImage struct { | ||
| v1.Image | ||
| config Config | ||
|
|
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| m atomic.Pointer[specv1.Manifest] | ||
| } | ||
|
|
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| func (img *artifactImage) MediaType() (types.MediaType, error) { | ||
| return types.OCIManifestSchema1, nil | ||
| } | ||
|
|
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| func (i *artifactImage) ConfigName() (v1.Hash, error) { | ||
| return partial.ConfigName(i) | ||
| } | ||
|
|
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| func (img *artifactImage) RawConfigFile() ([]byte, error) { | ||
| return img.config.RawConfigFile() | ||
| } | ||
|
|
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| func (img *artifactImage) Manifest() (*v1.Manifest, error) { | ||
| raw, err := img.RawManifest() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| m := &v1.Manifest{} | ||
|
|
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| if err := json.Unmarshal(raw, m); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return m, nil | ||
| } | ||
|
|
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| func (img *artifactImage) RawManifest() ([]byte, error) { | ||
| m, err := img.OCIManifest() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return json.MarshalIndent(m, "", " ") | ||
| } | ||
|
|
||
| func (img *artifactImage) OCIManifest() (*specv1.Manifest, error) { | ||
| if m := img.m.Load(); m != nil { | ||
| return m, nil | ||
| } | ||
|
|
||
| configRaw, err := img.RawConfigFile() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| cfgHash, cfgSize, err := v1.SHA256(bytes.NewReader(configRaw)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| mediaType, err := img.MediaType() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| artifactType, err := img.config.ArtifactType() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| configMediaType, err := img.config.ConfigMediaType() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| m := &specv1.Manifest{ | ||
| MediaType: string(mediaType), | ||
| ArtifactType: artifactType, | ||
| Config: specv1.Descriptor{ | ||
| MediaType: configMediaType, | ||
| Size: cfgSize, | ||
| Digest: digest.Digest(cfgHash.String()), | ||
| }, | ||
| } | ||
| m.SchemaVersion = 2 | ||
|
|
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| layers, err := img.Image.Layers() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| for _, l := range layers { | ||
| desc, err := partial.Descriptor(l) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| d := specv1.Descriptor{ | ||
| MediaType: string(desc.MediaType), | ||
| Digest: digest.Digest(desc.Digest.String()), | ||
| Size: desc.Size, | ||
| Annotations: desc.Annotations, | ||
| ArtifactType: desc.ArtifactType, | ||
| } | ||
|
|
||
| if p := desc.Platform; p != nil { | ||
| d.Platform = &specv1.Platform{ | ||
| Architecture: p.Architecture, | ||
| OS: p.OS, | ||
| OSVersion: p.OSVersion, | ||
| OSFeatures: p.OSFeatures, | ||
| Variant: p.Variant, | ||
| } | ||
| } | ||
|
|
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| m.Layers = append(m.Layers, d) | ||
| } | ||
|
|
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| img.m.Store(m) | ||
|
|
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| return m, nil | ||
| } | ||
|
|
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| func (img *artifactImage) Size() (int64, error) { | ||
| return partial.Size(img) | ||
| } | ||
|
|
||
| func (img *artifactImage) Digest() (v1.Hash, error) { | ||
| return partial.Digest(img) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| package artifact | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "io" | ||
| "sync" | ||
|
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||
| v1 "github.com/google/go-containerregistry/pkg/v1" | ||
| "github.com/google/go-containerregistry/pkg/v1/partial" | ||
| "github.com/google/go-containerregistry/pkg/v1/types" | ||
| ) | ||
|
|
||
| type Layer = v1.Layer | ||
|
|
||
| func FromBytes(mediaType string, data []byte) (Layer, error) { | ||
| return FromOpener(mediaType, func() (io.ReadCloser, error) { | ||
| return io.NopCloser(bytes.NewBuffer(data)), nil | ||
| }) | ||
| } | ||
|
|
||
| func FromReader(mediaType string, r io.Reader) (Layer, error) { | ||
| return FromOpener(mediaType, func() (io.ReadCloser, error) { | ||
| return io.NopCloser(r), nil | ||
| }) | ||
| } | ||
|
|
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| func FromOpener(mediaType string, uncompressed func() (io.ReadCloser, error)) (Layer, error) { | ||
| return NonCompressedLayer(&artifact{ | ||
| mediaType: mediaType, | ||
| uncompressed: uncompressed, | ||
| }), nil | ||
| } | ||
|
|
||
| type artifact struct { | ||
| mediaType string | ||
| uncompressed func() (io.ReadCloser, error) | ||
| } | ||
|
|
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| func (a *artifact) MediaType() (types.MediaType, error) { | ||
| return types.MediaType(a.mediaType), nil | ||
| } | ||
|
|
||
| func (a *artifact) Uncompressed() (io.ReadCloser, error) { | ||
| return a.uncompressed() | ||
| } | ||
|
|
||
| func Gzipped(l Layer) Layer { | ||
| return &compressed{ | ||
| Layer: l, | ||
| compressedLayer: sync.OnceValues(func() (v1.Layer, error) { | ||
| return partial.UncompressedToLayer(l) | ||
| }), | ||
| } | ||
| } | ||
|
|
||
| type compressed struct { | ||
| Layer | ||
| compressedLayer func() (v1.Layer, error) | ||
| } | ||
|
|
||
| func (a *compressed) MediaType() (types.MediaType, error) { | ||
| m, err := a.Layer.MediaType() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return types.MediaType(fmt.Sprintf("%s+gzip", m)), nil | ||
| } | ||
|
|
||
| func (a *compressed) Compressed() (io.ReadCloser, error) { | ||
| l, err := a.compressedLayer() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return l.Compressed() | ||
| } | ||
|
|
||
| func (a *compressed) Digest() (v1.Hash, error) { | ||
| l, err := a.compressedLayer() | ||
| if err != nil { | ||
| return v1.Hash{}, err | ||
| } | ||
| return l.Digest() | ||
| } | ||
|
|
||
| func WithDescriptor(l Layer, descriptor v1.Descriptor) Layer { | ||
| return &artifactWithDescriptor{ | ||
| desc: descriptor, | ||
| Layer: l, | ||
| } | ||
| } | ||
|
|
||
| type artifactWithDescriptor struct { | ||
| Layer | ||
|
|
||
| desc v1.Descriptor | ||
| } | ||
|
|
||
| func (w *artifactWithDescriptor) Descriptor() (*v1.Descriptor, error) { | ||
| return &w.desc, nil | ||
| } |
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