| /* |
| Copyright 2015 The Kubernetes Authors. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| package parsers |
| |
| import ( |
| "fmt" |
| // Import the crypto sha256 algorithm for the docker image parser to work |
| _ "crypto/sha256" |
| // Import the crypto/sha512 algorithm for the docker image parser to work with 384 and 512 sha hashes |
| _ "crypto/sha512" |
| |
| dockerref "github.com/docker/distribution/reference" |
| ) |
| |
| const ( |
| DefaultImageTag = "latest" |
| ) |
| |
| // ParseImageName parses a docker image string into three parts: repo, tag and digest. |
| // If both tag and digest are empty, a default image tag will be returned. |
| func ParseImageName(image string) (string, string, string, error) { |
| named, err := dockerref.ParseNormalizedNamed(image) |
| if err != nil { |
| return "", "", "", fmt.Errorf("couldn't parse image name: %v", err) |
| } |
| |
| repoToPull := named.Name() |
| var tag, digest string |
| |
| tagged, ok := named.(dockerref.Tagged) |
| if ok { |
| tag = tagged.Tag() |
| } |
| |
| digested, ok := named.(dockerref.Digested) |
| if ok { |
| digest = digested.Digest().String() |
| } |
| // If no tag was specified, use the default "latest". |
| if len(tag) == 0 && len(digest) == 0 { |
| tag = DefaultImageTag |
| } |
| return repoToPull, tag, digest, nil |
| } |