56 lines
1.8 KiB
Go
56 lines
1.8 KiB
Go
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package transports
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import (
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"fmt"
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"strings"
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"github.com/containers/image/directory"
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"github.com/containers/image/docker"
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"github.com/containers/image/oci"
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"github.com/containers/image/openshift"
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"github.com/containers/image/types"
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)
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// KnownTransports is a registry of known ImageTransport instances.
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var KnownTransports map[string]types.ImageTransport
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func init() {
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KnownTransports = make(map[string]types.ImageTransport)
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for _, t := range []types.ImageTransport{
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directory.Transport,
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docker.Transport,
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oci.Transport,
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openshift.Transport,
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} {
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name := t.Name()
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if _, ok := KnownTransports[name]; ok {
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panic(fmt.Sprintf("Duplicate image transport name %s", name))
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}
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KnownTransports[name] = t
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}
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}
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// ParseImageName converts a URL-like image name to a types.ImageReference.
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func ParseImageName(imgName string) (types.ImageReference, error) {
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parts := strings.SplitN(imgName, ":", 2)
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if len(parts) != 2 {
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return nil, fmt.Errorf(`Invalid image name "%s", expected colon-separated transport:reference`, imgName)
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}
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transport, ok := KnownTransports[parts[0]]
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if !ok {
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return nil, fmt.Errorf(`Invalid image name "%s", unknown transport "%s"`, imgName, parts[0])
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}
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return transport.ParseReference(parts[1])
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}
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// ImageName converts a types.ImageReference into an URL-like image name, which MUST be such that
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// ParseImageName(ImageName(reference)) returns an equivalent reference.
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//
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// This is the generally recommended way to refer to images in the UI.
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//
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// NOTE: The returned string is not promised to be equal to the original input to ParseImageName;
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// e.g. default attribute values omitted by the user may be filled in in the return value, or vice versa.
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func ImageName(ref types.ImageReference) string {
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return ref.Transport().Name() + ":" + ref.StringWithinTransport()
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}
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