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name.go
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name.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package oci
import (
"context"
"strings"
"github.com/google/go-containerregistry/pkg/authn"
"github.com/google/go-containerregistry/pkg/name"
v1 "github.com/google/go-containerregistry/pkg/v1"
"namespacelabs.dev/foundation/internal/build/registry"
"namespacelabs.dev/foundation/schema"
)
type Keychain interface {
Resolve(context.Context, authn.Resource) (authn.Authenticator, error)
}
type RepositoryWithParent struct {
Parent interface{}
RepositoryWithAccess
}
type RegistryAccess struct {
InsecureRegistry bool
PublicImage bool
Keychain Keychain
Transport *registry.RegistryTransport
}
type RepositoryWithAccess struct {
RegistryAccess
Repository string
}
func (t RepositoryWithParent) ComputeDigest(context.Context) (schema.Digest, error) {
return schema.DigestOf("insecureRegistry", t.InsecureRegistry, "repository", t.Repository, "transport", t.Transport)
}
func defaultTag(digest v1.Hash) string {
// Registry protocol requires a tag. go-containerregistry uses "latest" by default.
// We configute tags in ECR as immutable to harden versioning in deployments.
// This does not combine well, so we infer a stable tag here.
// Inferring the tag from the digest also helps to avoid AWS tag limits.
// https://docs.aws.amazon.com/AmazonECR/latest/userguide/service-quotas.html
return strings.TrimPrefix(digest.String(), "sha256:")
}
func ParseTag(tag RepositoryWithAccess, digest v1.Hash) (name.Tag, error) {
var opts []name.Option
if tag.InsecureRegistry {
opts = append(opts, name.Insecure)
}
opts = append(opts, name.WithDefaultTag(defaultTag(digest)))
return name.NewTag(tag.Repository, opts...)
}