forked from TrueCloudLab/distribution
39 lines
1.1 KiB
Go
39 lines
1.1 KiB
Go
package middleware
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import (
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"fmt"
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"github.com/docker/distribution"
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)
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// InitFunc is the type of a RegistryMiddleware factory function and is
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// used to register the constructor for different RegistryMiddleware backends.
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type InitFunc func(registry distribution.Registry, options map[string]interface{}) (distribution.Registry, error)
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var middlewares map[string]InitFunc
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// Register is used to register an InitFunc for
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// a RegistryMiddleware backend with the given name.
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func Register(name string, initFunc InitFunc) error {
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if middlewares == nil {
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middlewares = make(map[string]InitFunc)
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}
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if _, exists := middlewares[name]; exists {
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return fmt.Errorf("name already registered: %s", name)
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}
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middlewares[name] = initFunc
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return nil
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}
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// Get constructs a RegistryMiddleware with the given options using the named backend.
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func Get(name string, options map[string]interface{}, registry distribution.Registry) (distribution.Registry, error) {
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if middlewares != nil {
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if initFunc, exists := middlewares[name]; exists {
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return initFunc(registry, options)
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}
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}
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return nil, fmt.Errorf("no registry middleware registered with name: %s", name)
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}
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