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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.provision;
import com.yahoo.component.Version;
import java.util.Objects;
import java.util.Optional;
/**
* A container image.
*
* @author mpolden
*/
// TODO: Rename to ContainerImage. Compatibility with older config-models must be preserved.
public class DockerImage {
public static final DockerImage EMPTY = new DockerImage("", "", Optional.empty());
private final String registry;
private final String repository;
private final Optional<String> tag;
DockerImage(String registry, String repository, Optional<String> tag) {
this.registry = Objects.requireNonNull(registry, "registry must be non-null");
this.repository = Objects.requireNonNull(repository, "repository must be non-null");
this.tag = Objects.requireNonNull(tag, "tag must be non-null");
if (tag.isPresent() && tag.get().isBlank())
throw new IllegalArgumentException("Set tag cannot be empty");
}
/** Returns the registry-part of this, i.e. the host/port of the registry. */
public String registry() {
return registry;
}
/** Returns the repository-part of this */
public String repository() {
return repository;
}
/** Returns the registry and repository for this image, excluding its tag */
public String untagged() {
return new DockerImage(registry, repository, Optional.empty()).asString();
}
/** Returns this image's tag, if any */
public Optional<String> tag() {
return tag;
}
/** Returns the tag as a {@link Version}, {@link Version#emptyVersion} if tag is not set */
public Version tagAsVersion() {
return tag.map(Version::new).orElse(Version.emptyVersion);
}
/** Returns a copy of this tagged with the given version */
public DockerImage withTag(Version version) {
return new DockerImage(registry, repository, Optional.of(version.toFullString()));
}
/** Returns a copy of this with registry set to given value */
public DockerImage withRegistry(String registry) {
if (registry.isBlank()) throw new IllegalArgumentException("Registry cannot be empty");
if (registry.charAt(registry.length() - 1) == '/') throw new IllegalArgumentException("Registry cannot end with '/': " + registry);
return new DockerImage(registry, repository, tag);
}
public String asString() {
if (equals(EMPTY)) return "";
return registry + "/" + repository + tag.map(t -> ':' + t).orElse("");
}
@Override
public String toString() {
return asString();
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
DockerImage that = (DockerImage) o;
return registry.equals(that.registry) &&
repository.equals(that.repository) &&
tag.equals(that.tag);
}
@Override
public int hashCode() {
return Objects.hash(registry, repository, tag);
}
public static DockerImage fromString(String s) {
if (s.isEmpty()) return EMPTY;
int repositoryStart = s.lastIndexOf('/', s.lastIndexOf('/') - 1);
if (repositoryStart < 0) throw new IllegalArgumentException("Expected to find at least 2 path segments in: " + s);
String registry = s.substring(0, repositoryStart);
String repository = s.substring(repositoryStart + 1);
int tagStart = repository.indexOf(':');
Optional<String> tag = tagStart < 0 ? Optional.empty() : Optional.of(repository.substring(tagStart + 1));
if (tagStart >= 0) repository = repository.substring(0, tagStart);
if (repository.isEmpty()) throw new IllegalArgumentException("Repository must be non-empty in '" + s + "'");
return new DockerImage(registry, repository, tag);
}
}
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