drone-yaml/yaml/compiler/image/image.go

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2019-02-10 19:00:16 +00:00
// Copyright 2019 Drone IO, Inc.
//
// 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.
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package image
import "github.com/docker/distribution/reference"
// Trim returns the short image name without tag.
func Trim(name string) string {
ref, err := reference.ParseAnyReference(name)
if err != nil {
return name
}
named, err := reference.ParseNamed(ref.String())
if err != nil {
return name
}
named = reference.TrimNamed(named)
return reference.FamiliarName(named)
}
// Expand returns the fully qualified image name.
func Expand(name string) string {
ref, err := reference.ParseAnyReference(name)
if err != nil {
return name
}
named, err := reference.ParseNamed(ref.String())
if err != nil {
return name
}
named = reference.TagNameOnly(named)
return named.String()
}
// Match returns true if the image name matches
// an image in the list. Note the image tag is not used
// in the matching logic.
func Match(from string, to ...string) bool {
from = Trim(from)
for _, match := range to {
if from == Trim(match) {
return true
}
}
return false
}
// MatchTag returns true if the image name matches
// an image in the list, including the tag.
func MatchTag(a, b string) bool {
return Expand(a) == Expand(b)
}
// MatchHostname returns true if the image hostname
// matches the specified hostname.
func MatchHostname(image, hostname string) bool {
ref, err := reference.ParseAnyReference(image)
if err != nil {
return false
}
named, err := reference.ParseNamed(ref.String())
if err != nil {
return false
}
if hostname == "index.docker.io" {
hostname = "docker.io"
}
return reference.Domain(named) == hostname
}