58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
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package integration
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import (
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"context"
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"encoding/json"
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"io/ioutil"
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"os"
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"github.com/containerd/containerd/content"
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"github.com/containerd/containerd/content/local"
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"github.com/containerd/containerd/images/archive"
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ocispec "github.com/opencontainers/image-spec/specs-go/v1"
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)
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func providerFromBinary(fn string) (_ ocispec.Descriptor, _ content.Provider, _ func(), err error) {
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ctx := context.TODO()
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tmpDir, err := ioutil.TempDir("", "buildkit-state")
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if err != nil {
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return ocispec.Descriptor{}, nil, nil, err
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}
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close := func() {
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os.RemoveAll(tmpDir)
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}
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defer func() {
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if err != nil {
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close()
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}
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}()
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// can't use contentutil.Buffer because ImportIndex takes content.Store even though only requires Provider/Ingester
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c, err := local.NewStore(tmpDir)
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if err != nil {
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return ocispec.Descriptor{}, nil, nil, err
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}
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f, err := os.Open(fn)
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if err != nil {
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return ocispec.Descriptor{}, nil, nil, err
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}
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defer f.Close()
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desc, err := archive.ImportIndex(ctx, c, f)
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if err != nil {
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return ocispec.Descriptor{}, nil, nil, err
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}
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var idx ocispec.Index
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dt, err := content.ReadBlob(ctx, c, desc)
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if err != nil {
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return ocispec.Descriptor{}, nil, nil, err
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}
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if err := json.Unmarshal(dt, &idx); err != nil {
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return ocispec.Descriptor{}, nil, nil, err
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}
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return idx.Manifests[0], c, close, nil
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}
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