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8adb5f56de
Pull in https://github.com/containers/image/pull/37 , and update for CanonicalDockerReference() returning a reference.Named
33 lines
1.0 KiB
Go
33 lines
1.0 KiB
Go
package docker
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import (
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"fmt"
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"github.com/docker/docker/reference"
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)
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// parseImageName converts a string into a reference.
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// It is guaranteed that reference.IsNameOnly is false for the returned value.
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func parseImageName(img string) (reference.Named, error) {
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ref, err := reference.ParseNamed(img)
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if err != nil {
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return nil, err
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}
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ref = reference.WithDefaultTag(ref)
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if reference.IsNameOnly(ref) { // Sanity check that we are fulfulling our contract
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return nil, fmt.Errorf("Internal inconsistency: reference.IsNameOnly for reference %s (parsed from %s)", ref.String(), img)
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}
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return ref, nil
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}
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// tagOrDigest returns a tag or digest from a reference for which !reference.IsNameOnly.
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func tagOrDigest(ref reference.Named) (string, error) {
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if ref, ok := ref.(reference.Canonical); ok {
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return ref.Digest().String(), nil
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}
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if ref, ok := ref.(reference.NamedTagged); ok {
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return ref.Tag(), nil
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}
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return "", fmt.Errorf("Internal inconsistency: Reference %s unexpectedly has neither a digest nor a tag", ref.String())
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}
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