mirror of https://github.com/containers/image.git
19 lines
504 B
Go
19 lines
504 B
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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// 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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