71 lines
1.7 KiB
Go
71 lines
1.7 KiB
Go
package transports
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import (
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"fmt"
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"sync"
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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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type knownTransports struct {
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transports map[string]types.ImageTransport
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mu sync.Mutex
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}
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func (kt *knownTransports) Get(k string) types.ImageTransport {
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kt.mu.Lock()
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t := kt.transports[k]
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kt.mu.Unlock()
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return t
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}
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func (kt *knownTransports) Remove(k string) {
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kt.mu.Lock()
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delete(kt.transports, k)
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kt.mu.Unlock()
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}
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func (kt *knownTransports) Add(t types.ImageTransport) {
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kt.mu.Lock()
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defer kt.mu.Unlock()
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name := t.Name()
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if t := kt.transports[name]; t != nil {
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panic(fmt.Sprintf("Duplicate image transport name %s", name))
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}
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kt.transports[name] = t
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}
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var kt *knownTransports
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func init() {
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kt = &knownTransports{
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transports: make(map[string]types.ImageTransport),
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}
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}
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// Get returns the transport specified by name or nil when unavailable.
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func Get(name string) types.ImageTransport {
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return kt.Get(name)
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}
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// Delete deletes a transport from the registered transports.
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func Delete(name string) {
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kt.Remove(name)
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}
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// Register registers a transport.
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func Register(t types.ImageTransport) {
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kt.Add(t)
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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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