37 lines
1.7 KiB
Go
37 lines
1.7 KiB
Go
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package transports
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import (
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"fmt"
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"github.com/containers/image/types"
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)
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// stubTransport is an implementation of types.ImageTransport which has a name, but rejects any references with “the transport $name: is not supported in this build”.
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type stubTransport string
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// NewStubTransport returns an implementation of types.ImageTransport which has a name, but rejects any references with “the transport $name: is not supported in this build”.
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func NewStubTransport(name string) types.ImageTransport {
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return stubTransport(name)
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}
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// Name returns the name of the transport, which must be unique among other transports.
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func (s stubTransport) Name() string {
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return string(s)
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}
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// ParseReference converts a string, which should not start with the ImageTransport.Name prefix, into an ImageReference.
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func (s stubTransport) ParseReference(reference string) (types.ImageReference, error) {
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return nil, fmt.Errorf(`The transport "%s:" is not supported in this build`, string(s))
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}
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// ValidatePolicyConfigurationScope checks that scope is a valid name for a signature.PolicyTransportScopes keys
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// (i.e. a valid PolicyConfigurationIdentity() or PolicyConfigurationNamespaces() return value).
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// It is acceptable to allow an invalid value which will never be matched, it can "only" cause user confusion.
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// scope passed to this function will not be "", that value is always allowed.
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func (s stubTransport) ValidatePolicyConfigurationScope(scope string) error {
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// Allowing any reference in here allows tools with some transports stubbed-out to still
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// use signature verification policies which refer to these stubbed-out transports.
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// See also the treatment of unknown transports in policyTransportScopesWithTransport.UnmarshalJSON .
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return nil
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}
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