Package software.xdev.testcontainers.imagebuilder.compat

Class DockerfileCOPYParentsEmulator

java.lang.Object

software.xdev.testcontainers.imagebuilder.compat.DockerfileCOPYParentsEmulator

All Implemented Interfaces:

DockerFileLineModifier

public class DockerfileCOPYParentsEmulator
extends Object
implements DockerFileLineModifier

Emulates COPY --parents.

This flag currently (as of 2025-06) requires an experimental version of the Dockerfile syntax, which can only used with BuildKit.

BuildKit is not available due to multiple problems:

• Missing in testcontainers: testcontainers-java#2857
• Missing in upstream docker-java: docker-java#2361
• Build API is broken in multiple places:
  • Always requires to start a session: moby#48112
  • Does not expose BuildKit exporters: moby#50216

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DockerfileCOPYParentsEmulator.GlobMatcher

Constructor Summary

Constructors

Constructor	Description
DockerfileCOPYParentsEmulator()

Method Summary

Modifier and Type	Method	Description
protected Stream<String>	handleLine(String line, Set<String> relativeFiles)
List<String>	modify(List<String> lines, Set<String> relativeFiles)
protected static String	removeRelativeStart(String path)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DockerfileCOPYParentsEmulator

public DockerfileCOPYParentsEmulator()

Method Details

modify

public List<String> modify(List<String> lines,
 Set<String> relativeFiles)

Specified by:

modify in interface DockerFileLineModifier

handleLine

protected Stream<String> handleLine(String line,
 Set<String> relativeFiles)

removeRelativeStart

protected static String removeRelativeStart(String path)